added ergodox circuit diagram; and a few misc things; time to clean up
Ben Blazak
parent
cd6826eeb5
commit
98033358f4
|
|
@ -103,6 +103,7 @@
|
|||
(https://www.mainframe.cx/~ckuethe/avr-c-tutorial/)
|
||||
by Chris Kuethe
|
||||
|
||||
|
||||
## Protocol Stuff
|
||||
|
||||
### I²C
|
||||
|
|
@ -135,7 +136,9 @@
|
|||
: pdf (from <http://www.usb.org/developers/hidpage>)
|
||||
|
||||
|
||||
## Other Firmware / Code
|
||||
## Other People's Code
|
||||
|
||||
### Keyboard Firmware
|
||||
|
||||
* zip: [Phantom Firmware from PrinsValium]
|
||||
(http://geekhack.org/attachment.php?attachmentid=38982&d=1327895092)
|
||||
|
|
@ -173,10 +176,17 @@
|
|||
* mentioned on [the designer's blog]
|
||||
(http://humblehacker.com/blog/)
|
||||
|
||||
### TWI Libraries
|
||||
|
||||
* github: [TWI library in C]
|
||||
(https://github.com/arduino/Arduino/tree/master/libraries/Wire/utility)
|
||||
: (arduino / Arduino / libraries / Wire / utility)
|
||||
|
||||
* zip: [i2cmaster]
|
||||
(http://homepage.hispeed.ch/peterfleury/i2cmaster.zip)
|
||||
(by Peter Fleury, on [his homepage]
|
||||
(http://homepage.hispeed.ch/peterfleury/))
|
||||
|
||||
* forum: [Interfacing MCP23018 io expander via Arduino]
|
||||
(http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1282150189)
|
||||
: contains a quick MCP23017 library in C++
|
||||
|
|
@ -185,12 +195,16 @@
|
|||
(https://github.com/maniacbug/Arduino/tree/master/libraries/MCP23018)
|
||||
: library in C++
|
||||
|
||||
### USB
|
||||
|
||||
* zip: [PJRC: usb_keyboard]
|
||||
(http://pjrc.com/teensy/usb_keyboard.zip)
|
||||
|
||||
* mentioned on [the PJRC website]
|
||||
(http://pjrc.com/teensy/usb_keyboard.html)
|
||||
|
||||
### Miscellaneous
|
||||
|
||||
* zip: [PJRC: blinky]
|
||||
(http://pjrc.com/teensy/blinky.zip)
|
||||
|
||||
|
|
@ -248,9 +262,39 @@
|
|||
|
||||
## Miscellaneous
|
||||
|
||||
### Documentation and Design Tools
|
||||
|
||||
* [Markdown: Syntax]
|
||||
(http://daringfireball.net/projects/markdown/syntax)
|
||||
|
||||
* [KiCAD Tutorial]
|
||||
(http://teholabs.com/knowledge/kicad.html)
|
||||
(on <http://teholabs.com/>)
|
||||
|
||||
* mentioned on the [circuit/block-diagram drawing]
|
||||
(http://stackoverflow.com/questions/6422603/circuit-block-diagram-drawing)
|
||||
question (on <http://stackoverflow.com/>)
|
||||
|
||||
* [Ti_k_Z and PGF]
|
||||
(http://www.texample.net/tikz/)
|
||||
: a TeX graphics package
|
||||
|
||||
* mentioned on the [circuit/block-diagram drawing]
|
||||
(http://stackoverflow.com/questions/6422603/circuit-block-diagram-drawing)
|
||||
question (on <http://stackoverflow.com/>)
|
||||
|
||||
* [Documentation (for version 2010-09-28)]
|
||||
(http://www.texample.net/media/pgf/builds/pgfmanualCVS2010-09-28.pdf)
|
||||
: pdf
|
||||
|
||||
* [Example: Block diagram line junctions]
|
||||
(http://www.texample.net/tikz/examples/line-junctions/)
|
||||
|
||||
* [Inkscape : Connector tool tutorial]
|
||||
(http://wiki.inkscape.org/wiki/index.php/UsingTheConnectorTool)
|
||||
|
||||
### Typical Keyboard Information
|
||||
|
||||
* [Keyboard Scan Rates]
|
||||
(http://geekhack.org/showwiki.php?title=Keyboard+scan+rates)
|
||||
list (on <http://geekhack.org/>)
|
||||
|
|
|
|||
File diff suppressed because it is too large
Load Diff
|
After Width: | Height: | Size: 143 KiB |
|
|
@ -9,7 +9,7 @@
|
|||
|
||||
### Teensy 2.0
|
||||
|
||||
GND +---.....---+ VCC
|
||||
GND +---.....---+ Vcc
|
||||
SS PB0 + + PF0 ADC0
|
||||
SCLK PB1 + + PF1 ADC1
|
||||
MOSI PB2 + + PF4 ADC4
|
||||
|
|
@ -22,7 +22,7 @@
|
|||
OC3A (OC4A) -------- PC6 + + PD7 ADC10 T0 -- OC4D
|
||||
ICP3 ----- OC4A --------- PC7 +-+-+-+-+-+-+ PD6 ADC9 T1 - (OC4D) onboardLED
|
||||
CTS XCK1 PD5 --/ | | | \-- PD4 ADC8 ------------ ICP1
|
||||
VCC ------------------/ | \-------------- RST
|
||||
Vcc ------------------/ | \-------------- RST
|
||||
GND --------------------/
|
||||
|
||||
### Teensy 2.0 Pin Assignments
|
||||
|
|
|
|||
|
|
@ -1,476 +0,0 @@
|
|||
/*
|
||||
twi.c - TWI/I2C library for Wiring & Arduino
|
||||
Copyright (c) 2006 Nicholas Zambetti. All right reserved.
|
||||
|
||||
This library is free software; you can redistribute it and/or
|
||||
modify it under the terms of the GNU Lesser General Public
|
||||
License as published by the Free Software Foundation; either
|
||||
version 2.1 of the License, or (at your option) any later version.
|
||||
|
||||
This library is distributed in the hope that it will be useful,
|
||||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
Lesser General Public License for more details.
|
||||
|
||||
You should have received a copy of the GNU Lesser General Public
|
||||
License along with this library; if not, write to the Free Software
|
||||
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
||||
*/
|
||||
|
||||
#include <math.h>
|
||||
#include <stdlib.h>
|
||||
#include <inttypes.h>
|
||||
#include <avr/io.h>
|
||||
#include <avr/interrupt.h>
|
||||
#include <compat/twi.h>
|
||||
|
||||
#ifndef cbi
|
||||
#define cbi(sfr, bit) (_SFR_BYTE(sfr) &= ~_BV(bit))
|
||||
#endif
|
||||
|
||||
#ifndef sbi
|
||||
#define sbi(sfr, bit) (_SFR_BYTE(sfr) |= _BV(bit))
|
||||
#endif
|
||||
|
||||
#include "twi.h"
|
||||
|
||||
static volatile uint8_t twi_state;
|
||||
static uint8_t twi_slarw;
|
||||
|
||||
static void (*twi_onSlaveTransmit)(void);
|
||||
static void (*twi_onSlaveReceive)(uint8_t*, int);
|
||||
|
||||
static uint8_t twi_masterBuffer[TWI_BUFFER_LENGTH];
|
||||
static volatile uint8_t twi_masterBufferIndex;
|
||||
static uint8_t twi_masterBufferLength;
|
||||
|
||||
static uint8_t twi_txBuffer[TWI_BUFFER_LENGTH];
|
||||
static volatile uint8_t twi_txBufferIndex;
|
||||
static volatile uint8_t twi_txBufferLength;
|
||||
|
||||
static uint8_t twi_rxBuffer[TWI_BUFFER_LENGTH];
|
||||
static volatile uint8_t twi_rxBufferIndex;
|
||||
|
||||
static volatile uint8_t twi_error;
|
||||
|
||||
/*
|
||||
* Function twi_init
|
||||
* Desc readys twi pins and sets twi bitrate
|
||||
* Input none
|
||||
* Output none
|
||||
*/
|
||||
void twi_init(void)
|
||||
{
|
||||
// initialize state
|
||||
twi_state = TWI_READY;
|
||||
|
||||
#if defined(__AVR_ATmega168__) || defined(__AVR_ATmega8__) || defined(__AVR_ATmega328P__)
|
||||
// activate internal pull-ups for twi
|
||||
// as per note from atmega8 manual pg167
|
||||
sbi(PORTC, 4);
|
||||
sbi(PORTC, 5);
|
||||
#else
|
||||
// activate internal pull-ups for twi
|
||||
// as per note from atmega128 manual pg204
|
||||
sbi(PORTD, 0);
|
||||
sbi(PORTD, 1);
|
||||
#endif
|
||||
|
||||
// initialize twi prescaler and bit rate
|
||||
cbi(TWSR, TWPS0);
|
||||
cbi(TWSR, TWPS1);
|
||||
TWBR = ((CPU_FREQ / TWI_FREQ) - 16) / 2;
|
||||
|
||||
/* twi bit rate formula from atmega128 manual pg 204
|
||||
SCL Frequency = CPU Clock Frequency / (16 + (2 * TWBR))
|
||||
note: TWBR should be 10 or higher for master mode
|
||||
It is 72 for a 16mhz Wiring board with 100kHz TWI */
|
||||
|
||||
// enable twi module, acks, and twi interrupt
|
||||
TWCR = _BV(TWEN) | _BV(TWIE) | _BV(TWEA);
|
||||
}
|
||||
|
||||
/*
|
||||
* Function twi_slaveInit
|
||||
* Desc sets slave address and enables interrupt
|
||||
* Input none
|
||||
* Output none
|
||||
*/
|
||||
void twi_setAddress(uint8_t address)
|
||||
{
|
||||
// set twi slave address (skip over TWGCE bit)
|
||||
TWAR = address << 1;
|
||||
}
|
||||
|
||||
/*
|
||||
* Function twi_readFrom
|
||||
* Desc attempts to become twi bus master and read a
|
||||
* series of bytes from a device on the bus
|
||||
* Input address: 7bit i2c device address
|
||||
* data: pointer to byte array
|
||||
* length: number of bytes to read into array
|
||||
* Output number of bytes read
|
||||
*/
|
||||
uint8_t twi_readFrom(uint8_t address, uint8_t* data, uint8_t length)
|
||||
{
|
||||
uint8_t i;
|
||||
|
||||
// ensure data will fit into buffer
|
||||
if(TWI_BUFFER_LENGTH < length){
|
||||
return 0;
|
||||
}
|
||||
|
||||
// wait until twi is ready, become master receiver
|
||||
while(TWI_READY != twi_state){
|
||||
continue;
|
||||
}
|
||||
twi_state = TWI_MRX;
|
||||
// reset error state (0xFF.. no error occured)
|
||||
twi_error = 0xFF;
|
||||
|
||||
// initialize buffer iteration vars
|
||||
twi_masterBufferIndex = 0;
|
||||
twi_masterBufferLength = length-1; // This is not intuitive, read on...
|
||||
// On receive, the previously configured ACK/NACK setting is transmitted in
|
||||
// response to the received byte before the interrupt is signalled.
|
||||
// Therefor we must actually set NACK when the _next_ to last byte is
|
||||
// received, causing that NACK to be sent in response to receiving the last
|
||||
// expected byte of data.
|
||||
|
||||
// build sla+w, slave device address + w bit
|
||||
twi_slarw = TW_READ;
|
||||
twi_slarw |= address << 1;
|
||||
|
||||
// send start condition
|
||||
TWCR = _BV(TWEN) | _BV(TWIE) | _BV(TWEA) | _BV(TWINT) | _BV(TWSTA);
|
||||
|
||||
// wait for read operation to complete
|
||||
while(TWI_MRX == twi_state){
|
||||
continue;
|
||||
}
|
||||
|
||||
if (twi_masterBufferIndex < length)
|
||||
length = twi_masterBufferIndex;
|
||||
|
||||
// copy twi buffer to data
|
||||
for(i = 0; i < length; ++i){
|
||||
data[i] = twi_masterBuffer[i];
|
||||
}
|
||||
|
||||
return length;
|
||||
}
|
||||
|
||||
/*
|
||||
* Function twi_writeTo
|
||||
* Desc attempts to become twi bus master and write a
|
||||
* series of bytes to a device on the bus
|
||||
* Input address: 7bit i2c device address
|
||||
* data: pointer to byte array
|
||||
* length: number of bytes in array
|
||||
* wait: boolean indicating to wait for write or not
|
||||
* Output 0 .. success
|
||||
* 1 .. length to long for buffer
|
||||
* 2 .. address send, NACK received
|
||||
* 3 .. data send, NACK received
|
||||
* 4 .. other twi error (lost bus arbitration, bus error, ..)
|
||||
*/
|
||||
uint8_t twi_writeTo(uint8_t address, uint8_t* data, uint8_t length, uint8_t wait)
|
||||
{
|
||||
uint8_t i;
|
||||
|
||||
// ensure data will fit into buffer
|
||||
if(TWI_BUFFER_LENGTH < length){
|
||||
return 1;
|
||||
}
|
||||
|
||||
// wait until twi is ready, become master transmitter
|
||||
while(TWI_READY != twi_state){
|
||||
continue;
|
||||
}
|
||||
twi_state = TWI_MTX;
|
||||
// reset error state (0xFF.. no error occured)
|
||||
twi_error = 0xFF;
|
||||
|
||||
// initialize buffer iteration vars
|
||||
twi_masterBufferIndex = 0;
|
||||
twi_masterBufferLength = length;
|
||||
|
||||
// copy data to twi buffer
|
||||
for(i = 0; i < length; ++i){
|
||||
twi_masterBuffer[i] = data[i];
|
||||
}
|
||||
|
||||
// build sla+w, slave device address + w bit
|
||||
twi_slarw = TW_WRITE;
|
||||
twi_slarw |= address << 1;
|
||||
|
||||
// send start condition
|
||||
TWCR = _BV(TWEN) | _BV(TWIE) | _BV(TWEA) | _BV(TWINT) | _BV(TWSTA);
|
||||
|
||||
// wait for write operation to complete
|
||||
while(wait && (TWI_MTX == twi_state)){
|
||||
continue;
|
||||
}
|
||||
|
||||
if (twi_error == 0xFF)
|
||||
return 0; // success
|
||||
else if (twi_error == TW_MT_SLA_NACK)
|
||||
return 2; // error: address send, nack received
|
||||
else if (twi_error == TW_MT_DATA_NACK)
|
||||
return 3; // error: data send, nack received
|
||||
else
|
||||
return 4; // other twi error
|
||||
}
|
||||
|
||||
/*
|
||||
* Function twi_transmit
|
||||
* Desc fills slave tx buffer with data
|
||||
* must be called in slave tx event callback
|
||||
* Input data: pointer to byte array
|
||||
* length: number of bytes in array
|
||||
* Output 1 length too long for buffer
|
||||
* 2 not slave transmitter
|
||||
* 0 ok
|
||||
*/
|
||||
uint8_t twi_transmit(uint8_t* data, uint8_t length)
|
||||
{
|
||||
uint8_t i;
|
||||
|
||||
// ensure data will fit into buffer
|
||||
if(TWI_BUFFER_LENGTH < length){
|
||||
return 1;
|
||||
}
|
||||
|
||||
// ensure we are currently a slave transmitter
|
||||
if(TWI_STX != twi_state){
|
||||
return 2;
|
||||
}
|
||||
|
||||
// set length and copy data into tx buffer
|
||||
twi_txBufferLength = length;
|
||||
for(i = 0; i < length; ++i){
|
||||
twi_txBuffer[i] = data[i];
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* Function twi_attachSlaveRxEvent
|
||||
* Desc sets function called before a slave read operation
|
||||
* Input function: callback function to use
|
||||
* Output none
|
||||
*/
|
||||
void twi_attachSlaveRxEvent( void (*function)(uint8_t*, int) )
|
||||
{
|
||||
twi_onSlaveReceive = function;
|
||||
}
|
||||
|
||||
/*
|
||||
* Function twi_attachSlaveTxEvent
|
||||
* Desc sets function called before a slave write operation
|
||||
* Input function: callback function to use
|
||||
* Output none
|
||||
*/
|
||||
void twi_attachSlaveTxEvent( void (*function)(void) )
|
||||
{
|
||||
twi_onSlaveTransmit = function;
|
||||
}
|
||||
|
||||
/*
|
||||
* Function twi_reply
|
||||
* Desc sends byte or readys receive line
|
||||
* Input ack: byte indicating to ack or to nack
|
||||
* Output none
|
||||
*/
|
||||
void twi_reply(uint8_t ack)
|
||||
{
|
||||
// transmit master read ready signal, with or without ack
|
||||
if(ack){
|
||||
TWCR = _BV(TWEN) | _BV(TWIE) | _BV(TWINT) | _BV(TWEA);
|
||||
}else{
|
||||
TWCR = _BV(TWEN) | _BV(TWIE) | _BV(TWINT);
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* Function twi_stop
|
||||
* Desc relinquishes bus master status
|
||||
* Input none
|
||||
* Output none
|
||||
*/
|
||||
void twi_stop(void)
|
||||
{
|
||||
// send stop condition
|
||||
TWCR = _BV(TWEN) | _BV(TWIE) | _BV(TWEA) | _BV(TWINT) | _BV(TWSTO);
|
||||
|
||||
// wait for stop condition to be exectued on bus
|
||||
// TWINT is not set after a stop condition!
|
||||
while(TWCR & _BV(TWSTO)){
|
||||
continue;
|
||||
}
|
||||
|
||||
// update twi state
|
||||
twi_state = TWI_READY;
|
||||
}
|
||||
|
||||
/*
|
||||
* Function twi_releaseBus
|
||||
* Desc releases bus control
|
||||
* Input none
|
||||
* Output none
|
||||
*/
|
||||
void twi_releaseBus(void)
|
||||
{
|
||||
// release bus
|
||||
TWCR = _BV(TWEN) | _BV(TWIE) | _BV(TWEA) | _BV(TWINT);
|
||||
|
||||
// update twi state
|
||||
twi_state = TWI_READY;
|
||||
}
|
||||
|
||||
SIGNAL(TWI_vect)
|
||||
{
|
||||
switch(TW_STATUS){
|
||||
// All Master
|
||||
case TW_START: // sent start condition
|
||||
case TW_REP_START: // sent repeated start condition
|
||||
// copy device address and r/w bit to output register and ack
|
||||
TWDR = twi_slarw;
|
||||
twi_reply(1);
|
||||
break;
|
||||
|
||||
// Master Transmitter
|
||||
case TW_MT_SLA_ACK: // slave receiver acked address
|
||||
case TW_MT_DATA_ACK: // slave receiver acked data
|
||||
// if there is data to send, send it, otherwise stop
|
||||
if(twi_masterBufferIndex < twi_masterBufferLength){
|
||||
// copy data to output register and ack
|
||||
TWDR = twi_masterBuffer[twi_masterBufferIndex++];
|
||||
twi_reply(1);
|
||||
}else{
|
||||
twi_stop();
|
||||
}
|
||||
break;
|
||||
case TW_MT_SLA_NACK: // address sent, nack received
|
||||
twi_error = TW_MT_SLA_NACK;
|
||||
twi_stop();
|
||||
break;
|
||||
case TW_MT_DATA_NACK: // data sent, nack received
|
||||
twi_error = TW_MT_DATA_NACK;
|
||||
twi_stop();
|
||||
break;
|
||||
case TW_MT_ARB_LOST: // lost bus arbitration
|
||||
twi_error = TW_MT_ARB_LOST;
|
||||
twi_releaseBus();
|
||||
break;
|
||||
|
||||
// Master Receiver
|
||||
case TW_MR_DATA_ACK: // data received, ack sent
|
||||
// put byte into buffer
|
||||
twi_masterBuffer[twi_masterBufferIndex++] = TWDR;
|
||||
case TW_MR_SLA_ACK: // address sent, ack received
|
||||
// ack if more bytes are expected, otherwise nack
|
||||
if(twi_masterBufferIndex < twi_masterBufferLength){
|
||||
twi_reply(1);
|
||||
}else{
|
||||
twi_reply(0);
|
||||
}
|
||||
break;
|
||||
case TW_MR_DATA_NACK: // data received, nack sent
|
||||
// put final byte into buffer
|
||||
twi_masterBuffer[twi_masterBufferIndex++] = TWDR;
|
||||
case TW_MR_SLA_NACK: // address sent, nack received
|
||||
twi_stop();
|
||||
break;
|
||||
// TW_MR_ARB_LOST handled by TW_MT_ARB_LOST case
|
||||
|
||||
// Slave Receiver
|
||||
case TW_SR_SLA_ACK: // addressed, returned ack
|
||||
case TW_SR_GCALL_ACK: // addressed generally, returned ack
|
||||
case TW_SR_ARB_LOST_SLA_ACK: // lost arbitration, returned ack
|
||||
case TW_SR_ARB_LOST_GCALL_ACK: // lost arbitration, returned ack
|
||||
// enter slave receiver mode
|
||||
twi_state = TWI_SRX;
|
||||
// indicate that rx buffer can be overwritten and ack
|
||||
twi_rxBufferIndex = 0;
|
||||
twi_reply(1);
|
||||
break;
|
||||
case TW_SR_DATA_ACK: // data received, returned ack
|
||||
case TW_SR_GCALL_DATA_ACK: // data received generally, returned ack
|
||||
// if there is still room in the rx buffer
|
||||
if(twi_rxBufferIndex < TWI_BUFFER_LENGTH){
|
||||
// put byte in buffer and ack
|
||||
twi_rxBuffer[twi_rxBufferIndex++] = TWDR;
|
||||
twi_reply(1);
|
||||
}else{
|
||||
// otherwise nack
|
||||
twi_reply(0);
|
||||
}
|
||||
break;
|
||||
case TW_SR_STOP: // stop or repeated start condition received
|
||||
// put a null char after data if there's room
|
||||
if(twi_rxBufferIndex < TWI_BUFFER_LENGTH){
|
||||
twi_rxBuffer[twi_rxBufferIndex] = '\0';
|
||||
}
|
||||
// sends ack and stops interface for clock stretching
|
||||
twi_stop();
|
||||
// callback to user defined callback
|
||||
twi_onSlaveReceive(twi_rxBuffer, twi_rxBufferIndex);
|
||||
// since we submit rx buffer to "wire" library, we can reset it
|
||||
twi_rxBufferIndex = 0;
|
||||
// ack future responses and leave slave receiver state
|
||||
twi_releaseBus();
|
||||
break;
|
||||
case TW_SR_DATA_NACK: // data received, returned nack
|
||||
case TW_SR_GCALL_DATA_NACK: // data received generally, returned nack
|
||||
// nack back at master
|
||||
twi_reply(0);
|
||||
break;
|
||||
|
||||
// Slave Transmitter
|
||||
case TW_ST_SLA_ACK: // addressed, returned ack
|
||||
case TW_ST_ARB_LOST_SLA_ACK: // arbitration lost, returned ack
|
||||
// enter slave transmitter mode
|
||||
twi_state = TWI_STX;
|
||||
// ready the tx buffer index for iteration
|
||||
twi_txBufferIndex = 0;
|
||||
// set tx buffer length to be zero, to verify if user changes it
|
||||
twi_txBufferLength = 0;
|
||||
// request for txBuffer to be filled and length to be set
|
||||
// note: user must call twi_transmit(bytes, length) to do this
|
||||
twi_onSlaveTransmit();
|
||||
// if they didn't change buffer & length, initialize it
|
||||
if(0 == twi_txBufferLength){
|
||||
twi_txBufferLength = 1;
|
||||
twi_txBuffer[0] = 0x00;
|
||||
}
|
||||
// transmit first byte from buffer, fall
|
||||
case TW_ST_DATA_ACK: // byte sent, ack returned
|
||||
// copy data to output register
|
||||
TWDR = twi_txBuffer[twi_txBufferIndex++];
|
||||
// if there is more to send, ack, otherwise nack
|
||||
if(twi_txBufferIndex < twi_txBufferLength){
|
||||
twi_reply(1);
|
||||
}else{
|
||||
twi_reply(0);
|
||||
}
|
||||
break;
|
||||
case TW_ST_DATA_NACK: // received nack, we are done
|
||||
case TW_ST_LAST_DATA: // received ack, but we are done already!
|
||||
// ack future responses
|
||||
twi_reply(1);
|
||||
// leave slave receiver state
|
||||
twi_state = TWI_READY;
|
||||
break;
|
||||
|
||||
// All
|
||||
case TW_NO_INFO: // no state information
|
||||
break;
|
||||
case TW_BUS_ERROR: // bus error, illegal stop/start
|
||||
twi_error = TW_BUS_ERROR;
|
||||
twi_stop();
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
|
|
@ -1,57 +0,0 @@
|
|||
/*
|
||||
twi.h - TWI/I2C library for Wiring & Arduino
|
||||
Copyright (c) 2006 Nicholas Zambetti. All right reserved.
|
||||
|
||||
This library is free software; you can redistribute it and/or
|
||||
modify it under the terms of the GNU Lesser General Public
|
||||
License as published by the Free Software Foundation; either
|
||||
version 2.1 of the License, or (at your option) any later version.
|
||||
|
||||
This library is distributed in the hope that it will be useful,
|
||||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
Lesser General Public License for more details.
|
||||
|
||||
You should have received a copy of the GNU Lesser General Public
|
||||
License along with this library; if not, write to the Free Software
|
||||
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
||||
*/
|
||||
|
||||
#ifndef twi_h
|
||||
#define twi_h
|
||||
|
||||
#include <inttypes.h>
|
||||
|
||||
//#define ATMEGA8
|
||||
|
||||
#ifndef CPU_FREQ
|
||||
#define CPU_FREQ 16000000L
|
||||
#endif
|
||||
|
||||
#ifndef TWI_FREQ
|
||||
#define TWI_FREQ 100000L
|
||||
#endif
|
||||
|
||||
#ifndef TWI_BUFFER_LENGTH
|
||||
#define TWI_BUFFER_LENGTH 32
|
||||
#endif
|
||||
|
||||
#define TWI_READY 0
|
||||
#define TWI_MRX 1
|
||||
#define TWI_MTX 2
|
||||
#define TWI_SRX 3
|
||||
#define TWI_STX 4
|
||||
|
||||
void twi_init(void);
|
||||
void twi_setAddress(uint8_t);
|
||||
uint8_t twi_readFrom(uint8_t, uint8_t*, uint8_t);
|
||||
uint8_t twi_writeTo(uint8_t, uint8_t*, uint8_t, uint8_t);
|
||||
uint8_t twi_transmit(uint8_t*, uint8_t);
|
||||
void twi_attachSlaveRxEvent( void (*)(uint8_t*, int) );
|
||||
void twi_attachSlaveTxEvent( void (*)(void) );
|
||||
void twi_reply(uint8_t);
|
||||
void twi_stop(void);
|
||||
void twi_releaseBus(void);
|
||||
|
||||
#endif
|
||||
|
||||
|
|
@ -1,473 +0,0 @@
|
|||
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
|
||||
<html><head><meta http-equiv="Content-Type" content="text/html;charset=iso-8859-1">
|
||||
<title>AVR-GCC libraries: I2C Master library</title>
|
||||
<link href="doxygen.css" rel="stylesheet" type="text/css">
|
||||
</head><body>
|
||||
<!-- Generated by Doxygen 1.4.1 -->
|
||||
<h1>I2C Master library</h1><hr><a name="_details"></a><h2>Detailed Description</h2>
|
||||
I2C (TWI) Master Software Library.
|
||||
<p>
|
||||
<div class="fragment"><pre class="fragment"><span class="preprocessor"> #include <i2cmaster.h></span>
|
||||
</pre></div><p>
|
||||
Basic routines for communicating with I2C slave devices. This single master implementation is limited to one bus master on the I2C bus.<p>
|
||||
This I2c library is implemented as a compact assembler software implementation of the I2C protocol which runs on any AVR (i2cmaster.S) and as a TWI hardware interface for all AVR with built-in TWI hardware (twimaster.c). Since the API for these two implementations is exactly the same, an application can be linked either against the software I2C implementation or the hardware I2C implementation.<p>
|
||||
Use 4.7k pull-up resistor on the SDA and SCL pin.<p>
|
||||
Adapt the SCL and SDA port and pin definitions and eventually the delay routine in the module i2cmaster.S to your target when using the software I2C implementation !<p>
|
||||
Adjust the CPU clock frequence F_CPU in twimaster.c or in the Makfile when using the TWI hardware implementaion.<p>
|
||||
<dl compact><dt><b>Note:</b></dt><dd>The module i2cmaster.S is based on the Atmel Application Note AVR300, corrected and adapted to GNU assembler and AVR-GCC C call interface. Replaced the incorrect quarter period delays found in AVR300 with half period delays.</dd></dl>
|
||||
<dl compact><dt><b>Author:</b></dt><dd>Peter Fleury <a href="mailto:pfleury@gmx.ch">pfleury@gmx.ch</a> <a href="http://jump.to/fleury">http://jump.to/fleury</a></dd></dl>
|
||||
<dl compact><dt><b>API Usage Example</b></dt><dd>The following code shows typical usage of this library, see example test_i2cmaster.c</dd></dl>
|
||||
<div class="fragment"><pre class="fragment"><span class="preprocessor"> #include <i2cmaster.h></span>
|
||||
|
||||
|
||||
<span class="preprocessor"> #define Dev24C02 0xA2 // device address of EEPROM 24C02, see datasheet</span>
|
||||
<span class="preprocessor"></span>
|
||||
<span class="keywordtype">int</span> main(<span class="keywordtype">void</span>)
|
||||
{
|
||||
<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> ret;
|
||||
|
||||
<a class="code" href="group__pfleury__ic2master.html#ga0">i2c_init</a>(); <span class="comment">// initialize I2C library</span>
|
||||
|
||||
<span class="comment">// write 0x75 to EEPROM address 5 (Byte Write) </span>
|
||||
<a class="code" href="group__pfleury__ic2master.html#ga4">i2c_start_wait</a>(Dev24C02+I2C_WRITE); <span class="comment">// set device address and write mode</span>
|
||||
<a class="code" href="group__pfleury__ic2master.html#ga5">i2c_write</a>(0x05); <span class="comment">// write address = 5</span>
|
||||
<a class="code" href="group__pfleury__ic2master.html#ga5">i2c_write</a>(0x75); <span class="comment">// write value 0x75 to EEPROM</span>
|
||||
<a class="code" href="group__pfleury__ic2master.html#ga1">i2c_stop</a>(); <span class="comment">// set stop conditon = release bus</span>
|
||||
|
||||
|
||||
<span class="comment">// read previously written value back from EEPROM address 5 </span>
|
||||
<a class="code" href="group__pfleury__ic2master.html#ga4">i2c_start_wait</a>(Dev24C02+I2C_WRITE); <span class="comment">// set device address and write mode</span>
|
||||
|
||||
<a class="code" href="group__pfleury__ic2master.html#ga5">i2c_write</a>(0x05); <span class="comment">// write address = 5</span>
|
||||
<a class="code" href="group__pfleury__ic2master.html#ga3">i2c_rep_start</a>(Dev24C02+I2C_READ); <span class="comment">// set device address and read mode</span>
|
||||
|
||||
ret = <a class="code" href="group__pfleury__ic2master.html#ga7">i2c_readNak</a>(); <span class="comment">// read one byte from EEPROM</span>
|
||||
<a class="code" href="group__pfleury__ic2master.html#ga1">i2c_stop</a>();
|
||||
|
||||
<span class="keywordflow">for</span>(;;);
|
||||
}
|
||||
</pre></div>
|
||||
<p>
|
||||
<table border="0" cellpadding="0" cellspacing="0">
|
||||
<tr><td></td></tr>
|
||||
<tr><td colspan="2"><br><h2>Defines</h2></td></tr>
|
||||
<tr><td class="memItemLeft" nowrap align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__pfleury__ic2master.html#ga9">I2C_READ</a> 1</td></tr>
|
||||
|
||||
<tr><td class="memItemLeft" nowrap align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__pfleury__ic2master.html#ga10">I2C_WRITE</a> 0</td></tr>
|
||||
|
||||
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="ga11" doxytag="pfleury_ic2master::i2c_read"></a>
|
||||
#define </td><td class="memItemRight" valign="bottom"><b>i2c_read</b>(ack) (ack) ? i2c_readAck() : i2c_readNak();</td></tr>
|
||||
|
||||
<tr><td colspan="2"><br><h2>Functions</h2></td></tr>
|
||||
<tr><td class="memItemLeft" nowrap align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="group__pfleury__ic2master.html#ga0">i2c_init</a> (void)</td></tr>
|
||||
|
||||
<tr><td class="mdescLeft"> </td><td class="mdescRight">initialize the I2C master interace. Need to be called only once <a href="#ga0"></a><br></td></tr>
|
||||
<tr><td class="memItemLeft" nowrap align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="group__pfleury__ic2master.html#ga1">i2c_stop</a> (void)</td></tr>
|
||||
|
||||
<tr><td class="mdescLeft"> </td><td class="mdescRight">Terminates the data transfer and releases the I2C bus. <a href="#ga1"></a><br></td></tr>
|
||||
<tr><td class="memItemLeft" nowrap align="right" valign="top">unsigned char </td><td class="memItemRight" valign="bottom"><a class="el" href="group__pfleury__ic2master.html#ga2">i2c_start</a> (unsigned char addr)</td></tr>
|
||||
|
||||
<tr><td class="mdescLeft"> </td><td class="mdescRight">Issues a start condition and sends address and transfer direction. <a href="#ga2"></a><br></td></tr>
|
||||
<tr><td class="memItemLeft" nowrap align="right" valign="top">unsigned char </td><td class="memItemRight" valign="bottom"><a class="el" href="group__pfleury__ic2master.html#ga3">i2c_rep_start</a> (unsigned char addr)</td></tr>
|
||||
|
||||
<tr><td class="mdescLeft"> </td><td class="mdescRight">Issues a repeated start condition and sends address and transfer direction. <a href="#ga3"></a><br></td></tr>
|
||||
<tr><td class="memItemLeft" nowrap align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="group__pfleury__ic2master.html#ga4">i2c_start_wait</a> (unsigned char addr)</td></tr>
|
||||
|
||||
<tr><td class="mdescLeft"> </td><td class="mdescRight">Issues a start condition and sends address and transfer direction. <a href="#ga4"></a><br></td></tr>
|
||||
<tr><td class="memItemLeft" nowrap align="right" valign="top">unsigned char </td><td class="memItemRight" valign="bottom"><a class="el" href="group__pfleury__ic2master.html#ga5">i2c_write</a> (unsigned char data)</td></tr>
|
||||
|
||||
<tr><td class="mdescLeft"> </td><td class="mdescRight">Send one byte to I2C device. <a href="#ga5"></a><br></td></tr>
|
||||
<tr><td class="memItemLeft" nowrap align="right" valign="top">unsigned char </td><td class="memItemRight" valign="bottom"><a class="el" href="group__pfleury__ic2master.html#ga6">i2c_readAck</a> (void)</td></tr>
|
||||
|
||||
<tr><td class="mdescLeft"> </td><td class="mdescRight">read one byte from the I2C device, request more data from device <a href="#ga6"></a><br></td></tr>
|
||||
<tr><td class="memItemLeft" nowrap align="right" valign="top">unsigned char </td><td class="memItemRight" valign="bottom"><a class="el" href="group__pfleury__ic2master.html#ga7">i2c_readNak</a> (void)</td></tr>
|
||||
|
||||
<tr><td class="mdescLeft"> </td><td class="mdescRight">read one byte from the I2C device, read is followed by a stop condition <a href="#ga7"></a><br></td></tr>
|
||||
<tr><td class="memItemLeft" nowrap align="right" valign="top">unsigned char </td><td class="memItemRight" valign="bottom"><a class="el" href="group__pfleury__ic2master.html#ga8">i2c_read</a> (unsigned char ack)</td></tr>
|
||||
|
||||
<tr><td class="mdescLeft"> </td><td class="mdescRight">read one byte from the I2C device <a href="#ga8"></a><br></td></tr>
|
||||
</table>
|
||||
<hr><h2>Define Documentation</h2>
|
||||
<a class="anchor" name="ga9" doxytag="i2cmaster.h::I2C_READ"></a><p>
|
||||
<table class="mdTable" cellpadding="2" cellspacing="0">
|
||||
<tr>
|
||||
<td class="mdRow">
|
||||
<table cellpadding="0" cellspacing="0" border="0">
|
||||
<tr>
|
||||
<td class="md" nowrap valign="top">#define I2C_READ 1 </td>
|
||||
</tr>
|
||||
</table>
|
||||
</td>
|
||||
</tr>
|
||||
</table>
|
||||
<table cellspacing="5" cellpadding="0" border="0">
|
||||
<tr>
|
||||
<td>
|
||||
|
||||
</td>
|
||||
<td>
|
||||
|
||||
<p>
|
||||
defines the data direction (reading from I2C device) in <a class="el" href="group__pfleury__ic2master.html#ga2">i2c_start()</a>,<a class="el" href="group__pfleury__ic2master.html#ga3">i2c_rep_start()</a> </td>
|
||||
</tr>
|
||||
</table>
|
||||
<a class="anchor" name="ga10" doxytag="i2cmaster.h::I2C_WRITE"></a><p>
|
||||
<table class="mdTable" cellpadding="2" cellspacing="0">
|
||||
<tr>
|
||||
<td class="mdRow">
|
||||
<table cellpadding="0" cellspacing="0" border="0">
|
||||
<tr>
|
||||
<td class="md" nowrap valign="top">#define I2C_WRITE 0 </td>
|
||||
</tr>
|
||||
</table>
|
||||
</td>
|
||||
</tr>
|
||||
</table>
|
||||
<table cellspacing="5" cellpadding="0" border="0">
|
||||
<tr>
|
||||
<td>
|
||||
|
||||
</td>
|
||||
<td>
|
||||
|
||||
<p>
|
||||
defines the data direction (writing to I2C device) in <a class="el" href="group__pfleury__ic2master.html#ga2">i2c_start()</a>,<a class="el" href="group__pfleury__ic2master.html#ga3">i2c_rep_start()</a> </td>
|
||||
</tr>
|
||||
</table>
|
||||
<hr><h2>Function Documentation</h2>
|
||||
<a class="anchor" name="ga0" doxytag="i2cmaster.h::i2c_init"></a><p>
|
||||
<table class="mdTable" cellpadding="2" cellspacing="0">
|
||||
<tr>
|
||||
<td class="mdRow">
|
||||
<table cellpadding="0" cellspacing="0" border="0">
|
||||
<tr>
|
||||
<td class="md" nowrap valign="top">void i2c_init </td>
|
||||
<td class="md" valign="top">( </td>
|
||||
<td class="md" nowrap valign="top">void </td>
|
||||
<td class="mdname1" valign="top" nowrap> </td>
|
||||
<td class="md" valign="top"> ) </td>
|
||||
<td class="md" nowrap></td>
|
||||
</tr>
|
||||
</table>
|
||||
</td>
|
||||
</tr>
|
||||
</table>
|
||||
<table cellspacing="5" cellpadding="0" border="0">
|
||||
<tr>
|
||||
<td>
|
||||
|
||||
</td>
|
||||
<td>
|
||||
|
||||
<p>
|
||||
initialize the I2C master interace. Need to be called only once
|
||||
<p>
|
||||
<dl compact><dt><b>Parameters:</b></dt><dd>
|
||||
<table border="0" cellspacing="2" cellpadding="0">
|
||||
<tr><td valign="top"></td><td valign="top"><em>void</em> </td><td></td></tr>
|
||||
</table>
|
||||
</dl>
|
||||
<dl compact><dt><b>Returns:</b></dt><dd>none </dd></dl>
|
||||
</td>
|
||||
</tr>
|
||||
</table>
|
||||
<a class="anchor" name="ga1" doxytag="i2cmaster.h::i2c_stop"></a><p>
|
||||
<table class="mdTable" cellpadding="2" cellspacing="0">
|
||||
<tr>
|
||||
<td class="mdRow">
|
||||
<table cellpadding="0" cellspacing="0" border="0">
|
||||
<tr>
|
||||
<td class="md" nowrap valign="top">void i2c_stop </td>
|
||||
<td class="md" valign="top">( </td>
|
||||
<td class="md" nowrap valign="top">void </td>
|
||||
<td class="mdname1" valign="top" nowrap> </td>
|
||||
<td class="md" valign="top"> ) </td>
|
||||
<td class="md" nowrap></td>
|
||||
</tr>
|
||||
</table>
|
||||
</td>
|
||||
</tr>
|
||||
</table>
|
||||
<table cellspacing="5" cellpadding="0" border="0">
|
||||
<tr>
|
||||
<td>
|
||||
|
||||
</td>
|
||||
<td>
|
||||
|
||||
<p>
|
||||
Terminates the data transfer and releases the I2C bus.
|
||||
<p>
|
||||
<dl compact><dt><b>Parameters:</b></dt><dd>
|
||||
<table border="0" cellspacing="2" cellpadding="0">
|
||||
<tr><td valign="top"></td><td valign="top"><em>void</em> </td><td></td></tr>
|
||||
</table>
|
||||
</dl>
|
||||
<dl compact><dt><b>Returns:</b></dt><dd>none </dd></dl>
|
||||
</td>
|
||||
</tr>
|
||||
</table>
|
||||
<a class="anchor" name="ga2" doxytag="i2cmaster.h::i2c_start"></a><p>
|
||||
<table class="mdTable" cellpadding="2" cellspacing="0">
|
||||
<tr>
|
||||
<td class="mdRow">
|
||||
<table cellpadding="0" cellspacing="0" border="0">
|
||||
<tr>
|
||||
<td class="md" nowrap valign="top">unsigned char i2c_start </td>
|
||||
<td class="md" valign="top">( </td>
|
||||
<td class="md" nowrap valign="top">unsigned char </td>
|
||||
<td class="mdname1" valign="top" nowrap> <em>addr</em> </td>
|
||||
<td class="md" valign="top"> ) </td>
|
||||
<td class="md" nowrap></td>
|
||||
</tr>
|
||||
</table>
|
||||
</td>
|
||||
</tr>
|
||||
</table>
|
||||
<table cellspacing="5" cellpadding="0" border="0">
|
||||
<tr>
|
||||
<td>
|
||||
|
||||
</td>
|
||||
<td>
|
||||
|
||||
<p>
|
||||
Issues a start condition and sends address and transfer direction.
|
||||
<p>
|
||||
<dl compact><dt><b>Parameters:</b></dt><dd>
|
||||
<table border="0" cellspacing="2" cellpadding="0">
|
||||
<tr><td valign="top"></td><td valign="top"><em>addr</em> </td><td>address and transfer direction of I2C device </td></tr>
|
||||
</table>
|
||||
</dl>
|
||||
<dl compact><dt><b>Return values:</b></dt><dd>
|
||||
<table border="0" cellspacing="2" cellpadding="0">
|
||||
<tr><td valign="top"></td><td valign="top"><em>0</em> </td><td>device accessible </td></tr>
|
||||
<tr><td valign="top"></td><td valign="top"><em>1</em> </td><td>failed to access device </td></tr>
|
||||
</table>
|
||||
</dl>
|
||||
</td>
|
||||
</tr>
|
||||
</table>
|
||||
<a class="anchor" name="ga3" doxytag="i2cmaster.h::i2c_rep_start"></a><p>
|
||||
<table class="mdTable" cellpadding="2" cellspacing="0">
|
||||
<tr>
|
||||
<td class="mdRow">
|
||||
<table cellpadding="0" cellspacing="0" border="0">
|
||||
<tr>
|
||||
<td class="md" nowrap valign="top">unsigned char i2c_rep_start </td>
|
||||
<td class="md" valign="top">( </td>
|
||||
<td class="md" nowrap valign="top">unsigned char </td>
|
||||
<td class="mdname1" valign="top" nowrap> <em>addr</em> </td>
|
||||
<td class="md" valign="top"> ) </td>
|
||||
<td class="md" nowrap></td>
|
||||
</tr>
|
||||
</table>
|
||||
</td>
|
||||
</tr>
|
||||
</table>
|
||||
<table cellspacing="5" cellpadding="0" border="0">
|
||||
<tr>
|
||||
<td>
|
||||
|
||||
</td>
|
||||
<td>
|
||||
|
||||
<p>
|
||||
Issues a repeated start condition and sends address and transfer direction.
|
||||
<p>
|
||||
<dl compact><dt><b>Parameters:</b></dt><dd>
|
||||
<table border="0" cellspacing="2" cellpadding="0">
|
||||
<tr><td valign="top"></td><td valign="top"><em>addr</em> </td><td>address and transfer direction of I2C device </td></tr>
|
||||
</table>
|
||||
</dl>
|
||||
<dl compact><dt><b>Return values:</b></dt><dd>
|
||||
<table border="0" cellspacing="2" cellpadding="0">
|
||||
<tr><td valign="top"></td><td valign="top"><em>0</em> </td><td>device accessible </td></tr>
|
||||
<tr><td valign="top"></td><td valign="top"><em>1</em> </td><td>failed to access device </td></tr>
|
||||
</table>
|
||||
</dl>
|
||||
</td>
|
||||
</tr>
|
||||
</table>
|
||||
<a class="anchor" name="ga4" doxytag="i2cmaster.h::i2c_start_wait"></a><p>
|
||||
<table class="mdTable" cellpadding="2" cellspacing="0">
|
||||
<tr>
|
||||
<td class="mdRow">
|
||||
<table cellpadding="0" cellspacing="0" border="0">
|
||||
<tr>
|
||||
<td class="md" nowrap valign="top">void i2c_start_wait </td>
|
||||
<td class="md" valign="top">( </td>
|
||||
<td class="md" nowrap valign="top">unsigned char </td>
|
||||
<td class="mdname1" valign="top" nowrap> <em>addr</em> </td>
|
||||
<td class="md" valign="top"> ) </td>
|
||||
<td class="md" nowrap></td>
|
||||
</tr>
|
||||
</table>
|
||||
</td>
|
||||
</tr>
|
||||
</table>
|
||||
<table cellspacing="5" cellpadding="0" border="0">
|
||||
<tr>
|
||||
<td>
|
||||
|
||||
</td>
|
||||
<td>
|
||||
|
||||
<p>
|
||||
Issues a start condition and sends address and transfer direction.
|
||||
<p>
|
||||
If device is busy, use ack polling to wait until device ready <dl compact><dt><b>Parameters:</b></dt><dd>
|
||||
<table border="0" cellspacing="2" cellpadding="0">
|
||||
<tr><td valign="top"></td><td valign="top"><em>addr</em> </td><td>address and transfer direction of I2C device </td></tr>
|
||||
</table>
|
||||
</dl>
|
||||
<dl compact><dt><b>Returns:</b></dt><dd>none </dd></dl>
|
||||
</td>
|
||||
</tr>
|
||||
</table>
|
||||
<a class="anchor" name="ga5" doxytag="i2cmaster.h::i2c_write"></a><p>
|
||||
<table class="mdTable" cellpadding="2" cellspacing="0">
|
||||
<tr>
|
||||
<td class="mdRow">
|
||||
<table cellpadding="0" cellspacing="0" border="0">
|
||||
<tr>
|
||||
<td class="md" nowrap valign="top">unsigned char i2c_write </td>
|
||||
<td class="md" valign="top">( </td>
|
||||
<td class="md" nowrap valign="top">unsigned char </td>
|
||||
<td class="mdname1" valign="top" nowrap> <em>data</em> </td>
|
||||
<td class="md" valign="top"> ) </td>
|
||||
<td class="md" nowrap></td>
|
||||
</tr>
|
||||
</table>
|
||||
</td>
|
||||
</tr>
|
||||
</table>
|
||||
<table cellspacing="5" cellpadding="0" border="0">
|
||||
<tr>
|
||||
<td>
|
||||
|
||||
</td>
|
||||
<td>
|
||||
|
||||
<p>
|
||||
Send one byte to I2C device.
|
||||
<p>
|
||||
<dl compact><dt><b>Parameters:</b></dt><dd>
|
||||
<table border="0" cellspacing="2" cellpadding="0">
|
||||
<tr><td valign="top"></td><td valign="top"><em>data</em> </td><td>byte to be transfered </td></tr>
|
||||
</table>
|
||||
</dl>
|
||||
<dl compact><dt><b>Return values:</b></dt><dd>
|
||||
<table border="0" cellspacing="2" cellpadding="0">
|
||||
<tr><td valign="top"></td><td valign="top"><em>0</em> </td><td>write successful </td></tr>
|
||||
<tr><td valign="top"></td><td valign="top"><em>1</em> </td><td>write failed </td></tr>
|
||||
</table>
|
||||
</dl>
|
||||
</td>
|
||||
</tr>
|
||||
</table>
|
||||
<a class="anchor" name="ga6" doxytag="i2cmaster.h::i2c_readAck"></a><p>
|
||||
<table class="mdTable" cellpadding="2" cellspacing="0">
|
||||
<tr>
|
||||
<td class="mdRow">
|
||||
<table cellpadding="0" cellspacing="0" border="0">
|
||||
<tr>
|
||||
<td class="md" nowrap valign="top">unsigned char i2c_readAck </td>
|
||||
<td class="md" valign="top">( </td>
|
||||
<td class="md" nowrap valign="top">void </td>
|
||||
<td class="mdname1" valign="top" nowrap> </td>
|
||||
<td class="md" valign="top"> ) </td>
|
||||
<td class="md" nowrap></td>
|
||||
</tr>
|
||||
</table>
|
||||
</td>
|
||||
</tr>
|
||||
</table>
|
||||
<table cellspacing="5" cellpadding="0" border="0">
|
||||
<tr>
|
||||
<td>
|
||||
|
||||
</td>
|
||||
<td>
|
||||
|
||||
<p>
|
||||
read one byte from the I2C device, request more data from device
|
||||
<p>
|
||||
<dl compact><dt><b>Returns:</b></dt><dd>byte read from I2C device </dd></dl>
|
||||
</td>
|
||||
</tr>
|
||||
</table>
|
||||
<a class="anchor" name="ga7" doxytag="i2cmaster.h::i2c_readNak"></a><p>
|
||||
<table class="mdTable" cellpadding="2" cellspacing="0">
|
||||
<tr>
|
||||
<td class="mdRow">
|
||||
<table cellpadding="0" cellspacing="0" border="0">
|
||||
<tr>
|
||||
<td class="md" nowrap valign="top">unsigned char i2c_readNak </td>
|
||||
<td class="md" valign="top">( </td>
|
||||
<td class="md" nowrap valign="top">void </td>
|
||||
<td class="mdname1" valign="top" nowrap> </td>
|
||||
<td class="md" valign="top"> ) </td>
|
||||
<td class="md" nowrap></td>
|
||||
</tr>
|
||||
</table>
|
||||
</td>
|
||||
</tr>
|
||||
</table>
|
||||
<table cellspacing="5" cellpadding="0" border="0">
|
||||
<tr>
|
||||
<td>
|
||||
|
||||
</td>
|
||||
<td>
|
||||
|
||||
<p>
|
||||
read one byte from the I2C device, read is followed by a stop condition
|
||||
<p>
|
||||
<dl compact><dt><b>Returns:</b></dt><dd>byte read from I2C device </dd></dl>
|
||||
</td>
|
||||
</tr>
|
||||
</table>
|
||||
<a class="anchor" name="ga8" doxytag="i2cmaster.h::i2c_read"></a><p>
|
||||
<table class="mdTable" cellpadding="2" cellspacing="0">
|
||||
<tr>
|
||||
<td class="mdRow">
|
||||
<table cellpadding="0" cellspacing="0" border="0">
|
||||
<tr>
|
||||
<td class="md" nowrap valign="top">unsigned char i2c_read </td>
|
||||
<td class="md" valign="top">( </td>
|
||||
<td class="md" nowrap valign="top">unsigned char </td>
|
||||
<td class="mdname1" valign="top" nowrap> <em>ack</em> </td>
|
||||
<td class="md" valign="top"> ) </td>
|
||||
<td class="md" nowrap></td>
|
||||
</tr>
|
||||
</table>
|
||||
</td>
|
||||
</tr>
|
||||
</table>
|
||||
<table cellspacing="5" cellpadding="0" border="0">
|
||||
<tr>
|
||||
<td>
|
||||
|
||||
</td>
|
||||
<td>
|
||||
|
||||
<p>
|
||||
read one byte from the I2C device
|
||||
<p>
|
||||
Implemented as a macro, which calls either i2c_readAck or i2c_readNak<p>
|
||||
<dl compact><dt><b>Parameters:</b></dt><dd>
|
||||
<table border="0" cellspacing="2" cellpadding="0">
|
||||
<tr><td valign="top"></td><td valign="top"><em>ack</em> </td><td>1 send ack, request more data from device<br>
|
||||
0 send nak, read is followed by a stop condition </td></tr>
|
||||
</table>
|
||||
</dl>
|
||||
<dl compact><dt><b>Returns:</b></dt><dd>byte read from I2C device </dd></dl>
|
||||
</td>
|
||||
</tr>
|
||||
</table>
|
||||
<hr size="1"><address style="align: right;"><small>Generated on Tue Mar 29 16:54:08 2005 for AVR-GCC libraries by
|
||||
<a href="http://www.doxygen.org/index.html">
|
||||
<img src="doxygen.png" alt="doxygen" align="middle" border="0"></a> 1.4.1 </small></address>
|
||||
</body>
|
||||
</html>
|
||||
|
|
@ -1,302 +0,0 @@
|
|||
;*************************************************************************
|
||||
; Title : I2C (Single) Master Implementation
|
||||
; Author: Peter Fleury <pfleury@gmx.ch> http://jump.to/fleury
|
||||
; based on Atmel Appl. Note AVR300
|
||||
; File: $Id: i2cmaster.S,v 1.12 2008/03/02 08:51:27 peter Exp $
|
||||
; Software: AVR-GCC 3.3 or higher
|
||||
; Target: any AVR device
|
||||
;
|
||||
; DESCRIPTION
|
||||
; Basic routines for communicating with I2C slave devices. This
|
||||
; "single" master implementation is limited to one bus master on the
|
||||
; I2C bus.
|
||||
;
|
||||
; Based on the Atmel Application Note AVR300, corrected and adapted
|
||||
; to GNU assembler and AVR-GCC C call interface
|
||||
; Replaced the incorrect quarter period delays found in AVR300 with
|
||||
; half period delays.
|
||||
;
|
||||
; USAGE
|
||||
; These routines can be called from C, refere to file i2cmaster.h.
|
||||
; See example test_i2cmaster.c
|
||||
; Adapt the SCL and SDA port and pin definitions and eventually
|
||||
; the delay routine to your target !
|
||||
; Use 4.7k pull-up resistor on the SDA and SCL pin.
|
||||
;
|
||||
; NOTES
|
||||
; The I2C routines can be called either from non-interrupt or
|
||||
; interrupt routines, not both.
|
||||
;
|
||||
;*************************************************************************
|
||||
|
||||
#if (__GNUC__ * 100 + __GNUC_MINOR__) < 303
|
||||
#error "This library requires AVR-GCC 3.3 or later, update to newer AVR-GCC compiler !"
|
||||
#endif
|
||||
|
||||
|
||||
#include <avr/io.h>
|
||||
|
||||
|
||||
|
||||
;***** Adapt these SCA and SCL port and pin definition to your target !!
|
||||
;
|
||||
#define SDA 4 // SDA Port D, Pin 4
|
||||
#define SCL 5 // SCL Port D, Pin 5
|
||||
#define SDA_PORT PORTD // SDA Port D
|
||||
#define SCL_PORT PORTD // SCL Port D
|
||||
|
||||
;******
|
||||
|
||||
;-- map the IO register back into the IO address space
|
||||
#define SDA_DDR (_SFR_IO_ADDR(SDA_PORT) - 1)
|
||||
#define SCL_DDR (_SFR_IO_ADDR(SCL_PORT) - 1)
|
||||
#define SDA_OUT _SFR_IO_ADDR(SDA_PORT)
|
||||
#define SCL_OUT _SFR_IO_ADDR(SCL_PORT)
|
||||
#define SDA_IN (_SFR_IO_ADDR(SDA_PORT) - 2)
|
||||
#define SCL_IN (_SFR_IO_ADDR(SCL_PORT) - 2)
|
||||
|
||||
|
||||
#ifndef __tmp_reg__
|
||||
#define __tmp_reg__ 0
|
||||
#endif
|
||||
|
||||
|
||||
.section .text
|
||||
|
||||
;*************************************************************************
|
||||
; delay half period
|
||||
; For I2C in normal mode (100kHz), use T/2 > 5us
|
||||
; For I2C in fast mode (400kHz), use T/2 > 1.3us
|
||||
;*************************************************************************
|
||||
.stabs "",100,0,0,i2c_delay_T2
|
||||
.stabs "i2cmaster.S",100,0,0,i2c_delay_T2
|
||||
.func i2c_delay_T2 ; delay 5.0 microsec with 4 Mhz crystal
|
||||
i2c_delay_T2: ; 4 cycles
|
||||
rjmp 1f ; 2 "
|
||||
1: rjmp 2f ; 2 "
|
||||
2: rjmp 3f ; 2 "
|
||||
3: rjmp 4f ; 2 "
|
||||
4: rjmp 5f ; 2 "
|
||||
5: rjmp 6f ; 2 "
|
||||
6: nop ; 1 "
|
||||
ret ; 3 "
|
||||
.endfunc ; total 20 cyles = 5.0 microsec with 4 Mhz crystal
|
||||
|
||||
|
||||
;*************************************************************************
|
||||
; Initialization of the I2C bus interface. Need to be called only once
|
||||
;
|
||||
; extern void i2c_init(void)
|
||||
;*************************************************************************
|
||||
.global i2c_init
|
||||
.func i2c_init
|
||||
i2c_init:
|
||||
cbi SDA_DDR,SDA ;release SDA
|
||||
cbi SCL_DDR,SCL ;release SCL
|
||||
cbi SDA_OUT,SDA
|
||||
cbi SCL_OUT,SCL
|
||||
ret
|
||||
.endfunc
|
||||
|
||||
|
||||
;*************************************************************************
|
||||
; Issues a start condition and sends address and transfer direction.
|
||||
; return 0 = device accessible, 1= failed to access device
|
||||
;
|
||||
; extern unsigned char i2c_start(unsigned char addr);
|
||||
; addr = r24, return = r25(=0):r24
|
||||
;*************************************************************************
|
||||
|
||||
.global i2c_start
|
||||
.func i2c_start
|
||||
i2c_start:
|
||||
sbi SDA_DDR,SDA ;force SDA low
|
||||
rcall i2c_delay_T2 ;delay T/2
|
||||
|
||||
rcall i2c_write ;write address
|
||||
ret
|
||||
.endfunc
|
||||
|
||||
|
||||
;*************************************************************************
|
||||
; Issues a repeated start condition and sends address and transfer direction.
|
||||
; return 0 = device accessible, 1= failed to access device
|
||||
;
|
||||
; extern unsigned char i2c_rep_start(unsigned char addr);
|
||||
; addr = r24, return = r25(=0):r24
|
||||
;*************************************************************************
|
||||
|
||||
.global i2c_rep_start
|
||||
.func i2c_rep_start
|
||||
i2c_rep_start:
|
||||
sbi SCL_DDR,SCL ;force SCL low
|
||||
rcall i2c_delay_T2 ;delay T/2
|
||||
cbi SDA_DDR,SDA ;release SDA
|
||||
rcall i2c_delay_T2 ;delay T/2
|
||||
cbi SCL_DDR,SCL ;release SCL
|
||||
rcall i2c_delay_T2 ;delay T/2
|
||||
sbi SDA_DDR,SDA ;force SDA low
|
||||
rcall i2c_delay_T2 ;delay T/2
|
||||
|
||||
rcall i2c_write ;write address
|
||||
ret
|
||||
.endfunc
|
||||
|
||||
|
||||
;*************************************************************************
|
||||
; Issues a start condition and sends address and transfer direction.
|
||||
; If device is busy, use ack polling to wait until device is ready
|
||||
;
|
||||
; extern void i2c_start_wait(unsigned char addr);
|
||||
; addr = r24
|
||||
;*************************************************************************
|
||||
|
||||
.global i2c_start_wait
|
||||
.func i2c_start_wait
|
||||
i2c_start_wait:
|
||||
mov __tmp_reg__,r24
|
||||
i2c_start_wait1:
|
||||
sbi SDA_DDR,SDA ;force SDA low
|
||||
rcall i2c_delay_T2 ;delay T/2
|
||||
mov r24,__tmp_reg__
|
||||
rcall i2c_write ;write address
|
||||
tst r24 ;if device not busy -> done
|
||||
breq i2c_start_wait_done
|
||||
rcall i2c_stop ;terminate write operation
|
||||
rjmp i2c_start_wait1 ;device busy, poll ack again
|
||||
i2c_start_wait_done:
|
||||
ret
|
||||
.endfunc
|
||||
|
||||
|
||||
;*************************************************************************
|
||||
; Terminates the data transfer and releases the I2C bus
|
||||
;
|
||||
; extern void i2c_stop(void)
|
||||
;*************************************************************************
|
||||
|
||||
.global i2c_stop
|
||||
.func i2c_stop
|
||||
i2c_stop:
|
||||
sbi SCL_DDR,SCL ;force SCL low
|
||||
sbi SDA_DDR,SDA ;force SDA low
|
||||
rcall i2c_delay_T2 ;delay T/2
|
||||
cbi SCL_DDR,SCL ;release SCL
|
||||
rcall i2c_delay_T2 ;delay T/2
|
||||
cbi SDA_DDR,SDA ;release SDA
|
||||
rcall i2c_delay_T2 ;delay T/2
|
||||
ret
|
||||
.endfunc
|
||||
|
||||
|
||||
;*************************************************************************
|
||||
; Send one byte to I2C device
|
||||
; return 0 = write successful, 1 = write failed
|
||||
;
|
||||
; extern unsigned char i2c_write( unsigned char data );
|
||||
; data = r24, return = r25(=0):r24
|
||||
;*************************************************************************
|
||||
.global i2c_write
|
||||
.func i2c_write
|
||||
i2c_write:
|
||||
sec ;set carry flag
|
||||
rol r24 ;shift in carry and out bit one
|
||||
rjmp i2c_write_first
|
||||
i2c_write_bit:
|
||||
lsl r24 ;if transmit register empty
|
||||
i2c_write_first:
|
||||
breq i2c_get_ack
|
||||
sbi SCL_DDR,SCL ;force SCL low
|
||||
brcc i2c_write_low
|
||||
nop
|
||||
cbi SDA_DDR,SDA ;release SDA
|
||||
rjmp i2c_write_high
|
||||
i2c_write_low:
|
||||
sbi SDA_DDR,SDA ;force SDA low
|
||||
rjmp i2c_write_high
|
||||
i2c_write_high:
|
||||
rcall i2c_delay_T2 ;delay T/2
|
||||
cbi SCL_DDR,SCL ;release SCL
|
||||
rcall i2c_delay_T2 ;delay T/2
|
||||
rjmp i2c_write_bit
|
||||
|
||||
i2c_get_ack:
|
||||
sbi SCL_DDR,SCL ;force SCL low
|
||||
cbi SDA_DDR,SDA ;release SDA
|
||||
rcall i2c_delay_T2 ;delay T/2
|
||||
cbi SCL_DDR,SCL ;release SCL
|
||||
i2c_ack_wait:
|
||||
sbis SCL_IN,SCL ;wait SCL high (in case wait states are inserted)
|
||||
rjmp i2c_ack_wait
|
||||
|
||||
clr r24 ;return 0
|
||||
sbic SDA_IN,SDA ;if SDA high -> return 1
|
||||
ldi r24,1
|
||||
rcall i2c_delay_T2 ;delay T/2
|
||||
clr r25
|
||||
ret
|
||||
.endfunc
|
||||
|
||||
|
||||
|
||||
;*************************************************************************
|
||||
; read one byte from the I2C device, send ack or nak to device
|
||||
; (ack=1, send ack, request more data from device
|
||||
; ack=0, send nak, read is followed by a stop condition)
|
||||
;
|
||||
; extern unsigned char i2c_read(unsigned char ack);
|
||||
; ack = r24, return = r25(=0):r24
|
||||
; extern unsigned char i2c_readAck(void);
|
||||
; extern unsigned char i2c_readNak(void);
|
||||
; return = r25(=0):r24
|
||||
;*************************************************************************
|
||||
.global i2c_readAck
|
||||
.global i2c_readNak
|
||||
.global i2c_read
|
||||
.func i2c_read
|
||||
i2c_readNak:
|
||||
clr r24
|
||||
rjmp i2c_read
|
||||
i2c_readAck:
|
||||
ldi r24,0x01
|
||||
i2c_read:
|
||||
ldi r23,0x01 ;data = 0x01
|
||||
i2c_read_bit:
|
||||
sbi SCL_DDR,SCL ;force SCL low
|
||||
cbi SDA_DDR,SDA ;release SDA (from previous ACK)
|
||||
rcall i2c_delay_T2 ;delay T/2
|
||||
|
||||
cbi SCL_DDR,SCL ;release SCL
|
||||
rcall i2c_delay_T2 ;delay T/2
|
||||
|
||||
i2c_read_stretch:
|
||||
sbis SCL_IN, SCL ;loop until SCL is high (allow slave to stretch SCL)
|
||||
rjmp i2c_read_stretch
|
||||
|
||||
clc ;clear carry flag
|
||||
sbic SDA_IN,SDA ;if SDA is high
|
||||
sec ; set carry flag
|
||||
|
||||
rol r23 ;store bit
|
||||
brcc i2c_read_bit ;while receive register not full
|
||||
|
||||
i2c_put_ack:
|
||||
sbi SCL_DDR,SCL ;force SCL low
|
||||
cpi r24,1
|
||||
breq i2c_put_ack_low ;if (ack=0)
|
||||
cbi SDA_DDR,SDA ; release SDA
|
||||
rjmp i2c_put_ack_high
|
||||
i2c_put_ack_low: ;else
|
||||
sbi SDA_DDR,SDA ; force SDA low
|
||||
i2c_put_ack_high:
|
||||
rcall i2c_delay_T2 ;delay T/2
|
||||
cbi SCL_DDR,SCL ;release SCL
|
||||
i2c_put_ack_wait:
|
||||
sbis SCL_IN,SCL ;wait SCL high
|
||||
rjmp i2c_put_ack_wait
|
||||
rcall i2c_delay_T2 ;delay T/2
|
||||
mov r24,r23
|
||||
clr r25
|
||||
ret
|
||||
.endfunc
|
||||
|
||||
|
|
@ -1,178 +0,0 @@
|
|||
#ifndef _I2CMASTER_H
|
||||
#define _I2CMASTER_H 1
|
||||
/*************************************************************************
|
||||
* Title: C include file for the I2C master interface
|
||||
* (i2cmaster.S or twimaster.c)
|
||||
* Author: Peter Fleury <pfleury@gmx.ch> http://jump.to/fleury
|
||||
* File: $Id: i2cmaster.h,v 1.10 2005/03/06 22:39:57 Peter Exp $
|
||||
* Software: AVR-GCC 3.4.3 / avr-libc 1.2.3
|
||||
* Target: any AVR device
|
||||
* Usage: see Doxygen manual
|
||||
**************************************************************************/
|
||||
|
||||
#ifdef DOXYGEN
|
||||
/**
|
||||
@defgroup pfleury_ic2master I2C Master library
|
||||
@code #include <i2cmaster.h> @endcode
|
||||
|
||||
@brief I2C (TWI) Master Software Library
|
||||
|
||||
Basic routines for communicating with I2C slave devices. This single master
|
||||
implementation is limited to one bus master on the I2C bus.
|
||||
|
||||
This I2c library is implemented as a compact assembler software implementation of the I2C protocol
|
||||
which runs on any AVR (i2cmaster.S) and as a TWI hardware interface for all AVR with built-in TWI hardware (twimaster.c).
|
||||
Since the API for these two implementations is exactly the same, an application can be linked either against the
|
||||
software I2C implementation or the hardware I2C implementation.
|
||||
|
||||
Use 4.7k pull-up resistor on the SDA and SCL pin.
|
||||
|
||||
Adapt the SCL and SDA port and pin definitions and eventually the delay routine in the module
|
||||
i2cmaster.S to your target when using the software I2C implementation !
|
||||
|
||||
Adjust the CPU clock frequence F_CPU in twimaster.c or in the Makfile when using the TWI hardware implementaion.
|
||||
|
||||
@note
|
||||
The module i2cmaster.S is based on the Atmel Application Note AVR300, corrected and adapted
|
||||
to GNU assembler and AVR-GCC C call interface.
|
||||
Replaced the incorrect quarter period delays found in AVR300 with
|
||||
half period delays.
|
||||
|
||||
@author Peter Fleury pfleury@gmx.ch http://jump.to/fleury
|
||||
|
||||
@par API Usage Example
|
||||
The following code shows typical usage of this library, see example test_i2cmaster.c
|
||||
|
||||
@code
|
||||
|
||||
#include <i2cmaster.h>
|
||||
|
||||
|
||||
#define Dev24C02 0xA2 // device address of EEPROM 24C02, see datasheet
|
||||
|
||||
int main(void)
|
||||
{
|
||||
unsigned char ret;
|
||||
|
||||
i2c_init(); // initialize I2C library
|
||||
|
||||
// write 0x75 to EEPROM address 5 (Byte Write)
|
||||
i2c_start_wait(Dev24C02+I2C_WRITE); // set device address and write mode
|
||||
i2c_write(0x05); // write address = 5
|
||||
i2c_write(0x75); // write value 0x75 to EEPROM
|
||||
i2c_stop(); // set stop conditon = release bus
|
||||
|
||||
|
||||
// read previously written value back from EEPROM address 5
|
||||
i2c_start_wait(Dev24C02+I2C_WRITE); // set device address and write mode
|
||||
|
||||
i2c_write(0x05); // write address = 5
|
||||
i2c_rep_start(Dev24C02+I2C_READ); // set device address and read mode
|
||||
|
||||
ret = i2c_readNak(); // read one byte from EEPROM
|
||||
i2c_stop();
|
||||
|
||||
for(;;);
|
||||
}
|
||||
@endcode
|
||||
|
||||
*/
|
||||
#endif /* DOXYGEN */
|
||||
|
||||
/**@{*/
|
||||
|
||||
#if (__GNUC__ * 100 + __GNUC_MINOR__) < 304
|
||||
#error "This library requires AVR-GCC 3.4 or later, update to newer AVR-GCC compiler !"
|
||||
#endif
|
||||
|
||||
#include <avr/io.h>
|
||||
|
||||
/** defines the data direction (reading from I2C device) in i2c_start(),i2c_rep_start() */
|
||||
#define I2C_READ 1
|
||||
|
||||
/** defines the data direction (writing to I2C device) in i2c_start(),i2c_rep_start() */
|
||||
#define I2C_WRITE 0
|
||||
|
||||
|
||||
/**
|
||||
@brief initialize the I2C master interace. Need to be called only once
|
||||
@param void
|
||||
@return none
|
||||
*/
|
||||
extern void i2c_init(void);
|
||||
|
||||
|
||||
/**
|
||||
@brief Terminates the data transfer and releases the I2C bus
|
||||
@param void
|
||||
@return none
|
||||
*/
|
||||
extern void i2c_stop(void);
|
||||
|
||||
|
||||
/**
|
||||
@brief Issues a start condition and sends address and transfer direction
|
||||
|
||||
@param addr address and transfer direction of I2C device
|
||||
@retval 0 device accessible
|
||||
@retval 1 failed to access device
|
||||
*/
|
||||
extern unsigned char i2c_start(unsigned char addr);
|
||||
|
||||
|
||||
/**
|
||||
@brief Issues a repeated start condition and sends address and transfer direction
|
||||
|
||||
@param addr address and transfer direction of I2C device
|
||||
@retval 0 device accessible
|
||||
@retval 1 failed to access device
|
||||
*/
|
||||
extern unsigned char i2c_rep_start(unsigned char addr);
|
||||
|
||||
|
||||
/**
|
||||
@brief Issues a start condition and sends address and transfer direction
|
||||
|
||||
If device is busy, use ack polling to wait until device ready
|
||||
@param addr address and transfer direction of I2C device
|
||||
@return none
|
||||
*/
|
||||
extern void i2c_start_wait(unsigned char addr);
|
||||
|
||||
|
||||
/**
|
||||
@brief Send one byte to I2C device
|
||||
@param data byte to be transfered
|
||||
@retval 0 write successful
|
||||
@retval 1 write failed
|
||||
*/
|
||||
extern unsigned char i2c_write(unsigned char data);
|
||||
|
||||
|
||||
/**
|
||||
@brief read one byte from the I2C device, request more data from device
|
||||
@return byte read from I2C device
|
||||
*/
|
||||
extern unsigned char i2c_readAck(void);
|
||||
|
||||
/**
|
||||
@brief read one byte from the I2C device, read is followed by a stop condition
|
||||
@return byte read from I2C device
|
||||
*/
|
||||
extern unsigned char i2c_readNak(void);
|
||||
|
||||
/**
|
||||
@brief read one byte from the I2C device
|
||||
|
||||
Implemented as a macro, which calls either i2c_readAck or i2c_readNak
|
||||
|
||||
@param ack 1 send ack, request more data from device<br>
|
||||
0 send nak, read is followed by a stop condition
|
||||
@return byte read from I2C device
|
||||
*/
|
||||
extern unsigned char i2c_read(unsigned char ack);
|
||||
#define i2c_read(ack) (ack) ? i2c_readAck() : i2c_readNak();
|
||||
|
||||
|
||||
/**@}*/
|
||||
#endif
|
||||
|
|
@ -1,392 +0,0 @@
|
|||
# Makefile to compile and link the I2C Master library and test program
|
||||
#
|
||||
# based on
|
||||
# WinAVR Sample makefile written by Eric B. Weddington, Jörg Wunsch, et al.
|
||||
#
|
||||
# Note:
|
||||
# The warnings which appear while converting ELF to AVR Extended COFF (make extcoff)
|
||||
# can be ignored
|
||||
#
|
||||
#
|
||||
# On command line:
|
||||
#
|
||||
# make all = Make software.
|
||||
#
|
||||
# make clean = Clean out built project files.
|
||||
#
|
||||
# make coff = Convert ELF to AVR COFF (for use with AVR Studio 3.x or VMLAB).
|
||||
#
|
||||
# make extcoff = Convert ELF to AVR Extended COFF (for use with AVR Studio
|
||||
# 4.07 or greater).
|
||||
#
|
||||
# make program = Download the hex file to the device, using avrdude. Please
|
||||
# customize the avrdude settings below first!
|
||||
#
|
||||
# make filename.s = Just compile filename.c into the assembler code only
|
||||
#
|
||||
# To rebuild project do "make clean" then "make all".
|
||||
#
|
||||
|
||||
|
||||
# MCU name
|
||||
MCU = at90s8515
|
||||
|
||||
# Output format. (can be srec, ihex, binary)
|
||||
FORMAT = ihex
|
||||
|
||||
# Optimization level, can be [0, 1, 2, 3, s]. 0 turns off optimization.
|
||||
# (Note: 3 is not always the best optimization level. See avr-libc FAQ.)
|
||||
OPT = s
|
||||
|
||||
|
||||
# Target file name (without extension).
|
||||
TARGET = test_i2cmaster
|
||||
|
||||
|
||||
# List C source files here. (C dependencies are automatically generated.)
|
||||
SRC = $(TARGET).c
|
||||
|
||||
# List Assembler source files here.
|
||||
# Make them always end in a capital .S. Files ending in a lowercase .s
|
||||
# will not be considered source files but generated files (assembler
|
||||
# output from the compiler), and will be deleted upon "make clean"!
|
||||
# Even though the DOS/Win* filesystem matches both .s and .S the same,
|
||||
# it will preserve the spelling of the filenames, and gcc itself does
|
||||
# care about how the name is spelled on its command-line.
|
||||
ASRC = i2cmaster.S
|
||||
|
||||
|
||||
# List any extra directories to look for include files here.
|
||||
# Each directory must be seperated by a space.
|
||||
EXTRAINCDIRS =
|
||||
|
||||
|
||||
# Optional compiler flags.
|
||||
# -g: generate debugging information (for GDB, or for COFF conversion)
|
||||
# -O*: optimization level
|
||||
# -f...: tuning, see gcc manual and avr-libc documentation
|
||||
# -Wall...: warning level
|
||||
# -Wa,...: tell GCC to pass this to the assembler.
|
||||
# -ahlms: create assembler listing
|
||||
CFLAGS = -g -O$(OPT) \
|
||||
-funsigned-char -funsigned-bitfields -fpack-struct -fshort-enums \
|
||||
-Wall -Wstrict-prototypes \
|
||||
-Wa,-adhlns=$(<:.c=.lst) \
|
||||
$(patsubst %,-I%,$(EXTRAINCDIRS))
|
||||
|
||||
|
||||
# Set a "language standard" compiler flag.
|
||||
# Unremark just one line below to set the language standard to use.
|
||||
# gnu99 = C99 + GNU extensions. See GCC manual for more information.
|
||||
#CFLAGS += -std=c89
|
||||
#CFLAGS += -std=gnu89
|
||||
#CFLAGS += -std=c99
|
||||
CFLAGS += -std=gnu99
|
||||
|
||||
|
||||
|
||||
# Optional assembler flags.
|
||||
# -Wa,...: tell GCC to pass this to the assembler.
|
||||
# -ahlms: create listing
|
||||
# -gstabs: have the assembler create line number information; note that
|
||||
# for use in COFF files, additional information about filenames
|
||||
# and function names needs to be present in the assembler source
|
||||
# files -- see avr-libc docs [FIXME: not yet described there]
|
||||
ASFLAGS = -Wa,-adhlns=$(<:.S=.lst),-gstabs
|
||||
|
||||
|
||||
|
||||
# Optional linker flags.
|
||||
# -Wl,...: tell GCC to pass this to linker.
|
||||
# -Map: create map file
|
||||
# --cref: add cross reference to map file
|
||||
LDFLAGS = -Wl,-Map=$(TARGET).map,--cref
|
||||
|
||||
|
||||
|
||||
# Additional libraries
|
||||
|
||||
# Minimalistic printf version
|
||||
#LDFLAGS += -Wl,-u,vfprintf -lprintf_min
|
||||
|
||||
# Floating point printf version (requires -lm below)
|
||||
#LDFLAGS += -Wl,-u,vfprintf -lprintf_flt
|
||||
|
||||
# -lm = math library
|
||||
LDFLAGS += -lm
|
||||
|
||||
|
||||
|
||||
|
||||
# Programming support using avrdude. Settings and variables.
|
||||
|
||||
# Programming hardware: alf avr910 avrisp bascom bsd
|
||||
# dt006 pavr picoweb pony-stk200 sp12 stk200 stk500
|
||||
#
|
||||
# Type: avrdude -c ?
|
||||
# to get a full listing.
|
||||
#
|
||||
AVRDUDE_PROGRAMMER = stk500
|
||||
|
||||
|
||||
AVRDUDE_PORT = com1 # programmer connected to serial device
|
||||
#AVRDUDE_PORT = lpt1 # programmer connected to parallel port
|
||||
|
||||
AVRDUDE_WRITE_FLASH = -U flash:w:$(TARGET).hex
|
||||
#AVRDUDE_WRITE_EEPROM = -U eeprom:w:$(TARGET).eep
|
||||
|
||||
AVRDUDE_FLAGS = -p $(MCU) -P $(AVRDUDE_PORT) -c $(AVRDUDE_PROGRAMMER)
|
||||
|
||||
# Uncomment the following if you want avrdude's erase cycle counter.
|
||||
# Note that this counter needs to be initialized first using -Yn,
|
||||
# see avrdude manual.
|
||||
#AVRDUDE_ERASE += -y
|
||||
|
||||
# Uncomment the following if you do /not/ wish a verification to be
|
||||
# performed after programming the device.
|
||||
#AVRDUDE_FLAGS += -V
|
||||
|
||||
# Increase verbosity level. Please use this when submitting bug
|
||||
# reports about avrdude. See <http://savannah.nongnu.org/projects/avrdude>
|
||||
# to submit bug reports.
|
||||
#AVRDUDE_FLAGS += -v -v
|
||||
|
||||
|
||||
|
||||
|
||||
# ---------------------------------------------------------------------------
|
||||
|
||||
# Define directories, if needed.
|
||||
DIRAVR = c:/winavr
|
||||
DIRAVRBIN = $(DIRAVR)/bin
|
||||
DIRAVRUTILS = $(DIRAVR)/utils/bin
|
||||
DIRINC = .
|
||||
DIRLIB = $(DIRAVR)/avr/lib
|
||||
|
||||
|
||||
# Define programs and commands.
|
||||
SHELL = sh
|
||||
|
||||
CC = avr-gcc
|
||||
|
||||
OBJCOPY = avr-objcopy
|
||||
OBJDUMP = avr-objdump
|
||||
SIZE = avr-size
|
||||
|
||||
|
||||
# Programming support using avrdude.
|
||||
AVRDUDE = avrdude
|
||||
|
||||
|
||||
REMOVE = rm -f
|
||||
COPY = cp
|
||||
|
||||
HEXSIZE = $(SIZE) --target=$(FORMAT) $(TARGET).hex
|
||||
ELFSIZE = $(SIZE) -A $(TARGET).elf
|
||||
|
||||
|
||||
|
||||
# Define Messages
|
||||
# English
|
||||
MSG_ERRORS_NONE = Errors: none
|
||||
MSG_BEGIN = -------- begin --------
|
||||
MSG_END = -------- end --------
|
||||
MSG_SIZE_BEFORE = Size before:
|
||||
MSG_SIZE_AFTER = Size after:
|
||||
MSG_COFF = Converting to AVR COFF:
|
||||
MSG_EXTENDED_COFF = Converting to AVR Extended COFF:
|
||||
MSG_FLASH = Creating load file for Flash:
|
||||
MSG_EEPROM = Creating load file for EEPROM:
|
||||
MSG_EXTENDED_LISTING = Creating Extended Listing:
|
||||
MSG_SYMBOL_TABLE = Creating Symbol Table:
|
||||
MSG_LINKING = Linking:
|
||||
MSG_COMPILING = Compiling:
|
||||
MSG_ASSEMBLING = Assembling:
|
||||
MSG_CLEANING = Cleaning project:
|
||||
|
||||
|
||||
|
||||
|
||||
# Define all object files.
|
||||
OBJ = $(SRC:.c=.o) $(ASRC:.S=.o)
|
||||
|
||||
# Define all listing files.
|
||||
LST = $(ASRC:.S=.lst) $(SRC:.c=.lst)
|
||||
|
||||
# Combine all necessary flags and optional flags.
|
||||
# Add target processor to flags.
|
||||
ALL_CFLAGS = -mmcu=$(MCU) -I. $(CFLAGS)
|
||||
ALL_ASFLAGS = -mmcu=$(MCU) -I. -x assembler-with-cpp $(ASFLAGS)
|
||||
|
||||
|
||||
|
||||
# Default target.
|
||||
all: begin gccversion sizebefore $(TARGET).elf $(TARGET).hex $(TARGET).eep \
|
||||
$(TARGET).lss $(TARGET).sym sizeafter finished end
|
||||
|
||||
|
||||
# Eye candy.
|
||||
# AVR Studio 3.x does not check make's exit code but relies on
|
||||
# the following magic strings to be generated by the compile job.
|
||||
begin:
|
||||
@echo
|
||||
@echo $(MSG_BEGIN)
|
||||
|
||||
finished:
|
||||
@echo $(MSG_ERRORS_NONE)
|
||||
|
||||
end:
|
||||
@echo $(MSG_END)
|
||||
@echo
|
||||
|
||||
|
||||
# Display size of file.
|
||||
sizebefore:
|
||||
@if [ -f $(TARGET).elf ]; then echo; echo $(MSG_SIZE_BEFORE); $(ELFSIZE); echo; fi
|
||||
|
||||
sizeafter:
|
||||
@if [ -f $(TARGET).elf ]; then echo; echo $(MSG_SIZE_AFTER); $(ELFSIZE); echo; fi
|
||||
|
||||
|
||||
|
||||
# Display compiler version information.
|
||||
gccversion :
|
||||
@$(CC) --version
|
||||
|
||||
|
||||
|
||||
|
||||
# Convert ELF to COFF for use in debugging / simulating in
|
||||
# AVR Studio or VMLAB.
|
||||
COFFCONVERT=$(OBJCOPY) --debugging \
|
||||
--change-section-address .data-0x800000 \
|
||||
--change-section-address .bss-0x800000 \
|
||||
--change-section-address .noinit-0x800000 \
|
||||
--change-section-address .eeprom-0x810000
|
||||
|
||||
|
||||
coff: $(TARGET).elf
|
||||
@echo
|
||||
@echo $(MSG_COFF) $(TARGET).cof
|
||||
$(COFFCONVERT) -O coff-avr $< $(TARGET).cof
|
||||
|
||||
|
||||
extcoff: $(TARGET).elf
|
||||
@echo
|
||||
@echo $(MSG_EXTENDED_COFF) $(TARGET).cof
|
||||
$(COFFCONVERT) -O coff-ext-avr $< $(TARGET).cof
|
||||
|
||||
|
||||
|
||||
|
||||
# Program the device.
|
||||
program: $(TARGET).hex $(TARGET).eep
|
||||
$(AVRDUDE) $(AVRDUDE_FLAGS) $(AVRDUDE_WRITE_FLASH) $(AVRDUDE_WRITE_EEPROM)
|
||||
|
||||
|
||||
|
||||
|
||||
# Create final output files (.hex, .eep) from ELF output file.
|
||||
%.hex: %.elf
|
||||
@echo
|
||||
@echo $(MSG_FLASH) $@
|
||||
$(OBJCOPY) -O $(FORMAT) -R .eeprom $< $@
|
||||
|
||||
%.eep: %.elf
|
||||
@echo
|
||||
@echo $(MSG_EEPROM) $@
|
||||
-$(OBJCOPY) -j .eeprom --set-section-flags=.eeprom="alloc,load" \
|
||||
--change-section-lma .eeprom=0 -O $(FORMAT) $< $@
|
||||
|
||||
# Create extended listing file from ELF output file.
|
||||
%.lss: %.elf
|
||||
@echo
|
||||
@echo $(MSG_EXTENDED_LISTING) $@
|
||||
$(OBJDUMP) -h -S $< > $@
|
||||
|
||||
# Create a symbol table from ELF output file.
|
||||
%.sym: %.elf
|
||||
@echo
|
||||
@echo $(MSG_SYMBOL_TABLE) $@
|
||||
avr-nm -n $< > $@
|
||||
|
||||
|
||||
|
||||
# Link: create ELF output file from object files.
|
||||
.SECONDARY : $(TARGET).elf
|
||||
.PRECIOUS : $(OBJ)
|
||||
%.elf: $(OBJ)
|
||||
@echo
|
||||
@echo $(MSG_LINKING) $@
|
||||
$(CC) $(ALL_CFLAGS) $(OBJ) --output $@ $(LDFLAGS)
|
||||
|
||||
|
||||
# Compile: create object files from C source files.
|
||||
%.o : %.c
|
||||
@echo
|
||||
@echo $(MSG_COMPILING) $<
|
||||
$(CC) -c $(ALL_CFLAGS) $< -o $@
|
||||
|
||||
|
||||
# Compile: create assembler files from C source files.
|
||||
%.s : %.c
|
||||
$(CC) -S $(ALL_CFLAGS) $< -o $@
|
||||
|
||||
|
||||
# Assemble: create object files from assembler source files.
|
||||
%.o : %.S
|
||||
@echo
|
||||
@echo $(MSG_ASSEMBLING) $<
|
||||
$(CC) -c $(ALL_ASFLAGS) $< -o $@
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
# Target: clean project.
|
||||
clean: begin clean_list finished end
|
||||
|
||||
clean_list :
|
||||
@echo
|
||||
@echo $(MSG_CLEANING)
|
||||
$(REMOVE) $(TARGET).hex
|
||||
$(REMOVE) $(TARGET).eep
|
||||
$(REMOVE) $(TARGET).obj
|
||||
$(REMOVE) $(TARGET).cof
|
||||
$(REMOVE) $(TARGET).elf
|
||||
$(REMOVE) $(TARGET).map
|
||||
$(REMOVE) $(TARGET).obj
|
||||
$(REMOVE) $(TARGET).a90
|
||||
$(REMOVE) $(TARGET).sym
|
||||
$(REMOVE) $(TARGET).lnk
|
||||
$(REMOVE) $(TARGET).lss
|
||||
$(REMOVE) $(OBJ)
|
||||
$(REMOVE) $(LST)
|
||||
$(REMOVE) $(SRC:.c=.s)
|
||||
$(REMOVE) $(SRC:.c=.d)
|
||||
|
||||
|
||||
# Automatically generate C source code dependencies.
|
||||
# (Code originally taken from the GNU make user manual and modified
|
||||
# (See README.txt Credits).)
|
||||
#
|
||||
# Note that this will work with sh (bash) and sed that is shipped with WinAVR
|
||||
# (see the SHELL variable defined above).
|
||||
# This may not work with other shells or other seds.
|
||||
#
|
||||
%.d: %.c
|
||||
set -e; $(CC) -MM $(ALL_CFLAGS) $< \
|
||||
| sed 's,\(.*\)\.o[ :]*,\1.o \1.d : ,g' > $@; \
|
||||
[ -s $@ ] || rm -f $@
|
||||
|
||||
|
||||
# Remove the '-' if you want to see the dependency files generated.
|
||||
-include $(SRC:.c=.d)
|
||||
|
||||
|
||||
|
||||
# Listing of phony targets.
|
||||
.PHONY : all begin finish end sizebefore sizeafter gccversion coff extcoff \
|
||||
clean clean_list program
|
||||
|
||||
|
|
@ -1,392 +0,0 @@
|
|||
# Makefile to compile and link the I2C Master library and test program
|
||||
#
|
||||
# based on
|
||||
# WinAVR Sample makefile written by Eric B. Weddington, Jörg Wunsch, et al.
|
||||
#
|
||||
# Note:
|
||||
# The warnings which appear while converting ELF to AVR Extended COFF (make extcoff)
|
||||
# can be ignored
|
||||
#
|
||||
#
|
||||
# On command line:
|
||||
#
|
||||
# make all = Make software.
|
||||
#
|
||||
# make clean = Clean out built project files.
|
||||
#
|
||||
# make coff = Convert ELF to AVR COFF (for use with AVR Studio 3.x or VMLAB).
|
||||
#
|
||||
# make extcoff = Convert ELF to AVR Extended COFF (for use with AVR Studio
|
||||
# 4.07 or greater).
|
||||
#
|
||||
# make program = Download the hex file to the device, using avrdude. Please
|
||||
# customize the avrdude settings below first!
|
||||
#
|
||||
# make filename.s = Just compile filename.c into the assembler code only
|
||||
#
|
||||
# To rebuild project do "make clean" then "make all".
|
||||
#
|
||||
|
||||
|
||||
# MCU name
|
||||
MCU = at90s8515
|
||||
|
||||
# Output format. (can be srec, ihex, binary)
|
||||
FORMAT = ihex
|
||||
|
||||
# Optimization level, can be [0, 1, 2, 3, s]. 0 turns off optimization.
|
||||
# (Note: 3 is not always the best optimization level. See avr-libc FAQ.)
|
||||
OPT = s
|
||||
|
||||
|
||||
# Target file name (without extension).
|
||||
TARGET = test_i2cmaster
|
||||
|
||||
|
||||
# List C source files here. (C dependencies are automatically generated.)
|
||||
SRC = $(TARGET).c
|
||||
|
||||
# List Assembler source files here.
|
||||
# Make them always end in a capital .S. Files ending in a lowercase .s
|
||||
# will not be considered source files but generated files (assembler
|
||||
# output from the compiler), and will be deleted upon "make clean"!
|
||||
# Even though the DOS/Win* filesystem matches both .s and .S the same,
|
||||
# it will preserve the spelling of the filenames, and gcc itself does
|
||||
# care about how the name is spelled on its command-line.
|
||||
ASRC = i2cmaster.S
|
||||
|
||||
|
||||
# List any extra directories to look for include files here.
|
||||
# Each directory must be seperated by a space.
|
||||
EXTRAINCDIRS =
|
||||
|
||||
|
||||
# Optional compiler flags.
|
||||
# -g: generate debugging information (for GDB, or for COFF conversion)
|
||||
# -O*: optimization level
|
||||
# -f...: tuning, see gcc manual and avr-libc documentation
|
||||
# -Wall...: warning level
|
||||
# -Wa,...: tell GCC to pass this to the assembler.
|
||||
# -ahlms: create assembler listing
|
||||
CFLAGS = -g -O$(OPT) \
|
||||
-funsigned-char -funsigned-bitfields -fpack-struct -fshort-enums \
|
||||
-Wall -Wstrict-prototypes \
|
||||
-Wa,-adhlns=$(<:.c=.lst) \
|
||||
$(patsubst %,-I%,$(EXTRAINCDIRS))
|
||||
|
||||
|
||||
# Set a "language standard" compiler flag.
|
||||
# Unremark just one line below to set the language standard to use.
|
||||
# gnu99 = C99 + GNU extensions. See GCC manual for more information.
|
||||
#CFLAGS += -std=c89
|
||||
#CFLAGS += -std=gnu89
|
||||
#CFLAGS += -std=c99
|
||||
CFLAGS += -std=gnu99
|
||||
|
||||
|
||||
|
||||
# Optional assembler flags.
|
||||
# -Wa,...: tell GCC to pass this to the assembler.
|
||||
# -ahlms: create listing
|
||||
# -gstabs: have the assembler create line number information; note that
|
||||
# for use in COFF files, additional information about filenames
|
||||
# and function names needs to be present in the assembler source
|
||||
# files -- see avr-libc docs [FIXME: not yet described there]
|
||||
ASFLAGS = -Wa,-adhlns=$(<:.S=.lst),-gstabs
|
||||
|
||||
|
||||
|
||||
# Optional linker flags.
|
||||
# -Wl,...: tell GCC to pass this to linker.
|
||||
# -Map: create map file
|
||||
# --cref: add cross reference to map file
|
||||
LDFLAGS = -Wl,-Map=$(TARGET).map,--cref
|
||||
|
||||
|
||||
|
||||
# Additional libraries
|
||||
|
||||
# Minimalistic printf version
|
||||
#LDFLAGS += -Wl,-u,vfprintf -lprintf_min
|
||||
|
||||
# Floating point printf version (requires -lm below)
|
||||
#LDFLAGS += -Wl,-u,vfprintf -lprintf_flt
|
||||
|
||||
# -lm = math library
|
||||
LDFLAGS += -lm
|
||||
|
||||
|
||||
|
||||
|
||||
# Programming support using avrdude. Settings and variables.
|
||||
|
||||
# Programming hardware: alf avr910 avrisp bascom bsd
|
||||
# dt006 pavr picoweb pony-stk200 sp12 stk200 stk500
|
||||
#
|
||||
# Type: avrdude -c ?
|
||||
# to get a full listing.
|
||||
#
|
||||
AVRDUDE_PROGRAMMER = stk500
|
||||
|
||||
|
||||
AVRDUDE_PORT = com1 # programmer connected to serial device
|
||||
#AVRDUDE_PORT = lpt1 # programmer connected to parallel port
|
||||
|
||||
AVRDUDE_WRITE_FLASH = -U flash:w:$(TARGET).hex
|
||||
#AVRDUDE_WRITE_EEPROM = -U eeprom:w:$(TARGET).eep
|
||||
|
||||
AVRDUDE_FLAGS = -p $(MCU) -P $(AVRDUDE_PORT) -c $(AVRDUDE_PROGRAMMER)
|
||||
|
||||
# Uncomment the following if you want avrdude's erase cycle counter.
|
||||
# Note that this counter needs to be initialized first using -Yn,
|
||||
# see avrdude manual.
|
||||
#AVRDUDE_ERASE += -y
|
||||
|
||||
# Uncomment the following if you do /not/ wish a verification to be
|
||||
# performed after programming the device.
|
||||
#AVRDUDE_FLAGS += -V
|
||||
|
||||
# Increase verbosity level. Please use this when submitting bug
|
||||
# reports about avrdude. See <http://savannah.nongnu.org/projects/avrdude>
|
||||
# to submit bug reports.
|
||||
#AVRDUDE_FLAGS += -v -v
|
||||
|
||||
|
||||
|
||||
|
||||
# ---------------------------------------------------------------------------
|
||||
|
||||
# Define directories, if needed.
|
||||
DIRAVR = c:/winavr
|
||||
DIRAVRBIN = $(DIRAVR)/bin
|
||||
DIRAVRUTILS = $(DIRAVR)/utils/bin
|
||||
DIRINC = .
|
||||
DIRLIB = $(DIRAVR)/avr/lib
|
||||
|
||||
|
||||
# Define programs and commands.
|
||||
SHELL = sh
|
||||
|
||||
CC = avr-gcc
|
||||
|
||||
OBJCOPY = avr-objcopy
|
||||
OBJDUMP = avr-objdump
|
||||
SIZE = avr-size
|
||||
|
||||
|
||||
# Programming support using avrdude.
|
||||
AVRDUDE = avrdude
|
||||
|
||||
|
||||
REMOVE = rm -f
|
||||
COPY = cp
|
||||
|
||||
HEXSIZE = $(SIZE) --target=$(FORMAT) $(TARGET).hex
|
||||
ELFSIZE = $(SIZE) -A $(TARGET).elf
|
||||
|
||||
|
||||
|
||||
# Define Messages
|
||||
# English
|
||||
MSG_ERRORS_NONE = Errors: none
|
||||
MSG_BEGIN = -------- begin --------
|
||||
MSG_END = -------- end --------
|
||||
MSG_SIZE_BEFORE = Size before:
|
||||
MSG_SIZE_AFTER = Size after:
|
||||
MSG_COFF = Converting to AVR COFF:
|
||||
MSG_EXTENDED_COFF = Converting to AVR Extended COFF:
|
||||
MSG_FLASH = Creating load file for Flash:
|
||||
MSG_EEPROM = Creating load file for EEPROM:
|
||||
MSG_EXTENDED_LISTING = Creating Extended Listing:
|
||||
MSG_SYMBOL_TABLE = Creating Symbol Table:
|
||||
MSG_LINKING = Linking:
|
||||
MSG_COMPILING = Compiling:
|
||||
MSG_ASSEMBLING = Assembling:
|
||||
MSG_CLEANING = Cleaning project:
|
||||
|
||||
|
||||
|
||||
|
||||
# Define all object files.
|
||||
OBJ = $(SRC:.c=.o) $(ASRC:.S=.o)
|
||||
|
||||
# Define all listing files.
|
||||
LST = $(ASRC:.S=.lst) $(SRC:.c=.lst)
|
||||
|
||||
# Combine all necessary flags and optional flags.
|
||||
# Add target processor to flags.
|
||||
ALL_CFLAGS = -mmcu=$(MCU) -I. $(CFLAGS)
|
||||
ALL_ASFLAGS = -mmcu=$(MCU) -I. -x assembler-with-cpp $(ASFLAGS)
|
||||
|
||||
|
||||
|
||||
# Default target.
|
||||
all: begin gccversion sizebefore $(TARGET).elf $(TARGET).hex $(TARGET).eep \
|
||||
$(TARGET).lss $(TARGET).sym sizeafter finished end
|
||||
|
||||
|
||||
# Eye candy.
|
||||
# AVR Studio 3.x does not check make's exit code but relies on
|
||||
# the following magic strings to be generated by the compile job.
|
||||
begin:
|
||||
@echo
|
||||
@echo $(MSG_BEGIN)
|
||||
|
||||
finished:
|
||||
@echo $(MSG_ERRORS_NONE)
|
||||
|
||||
end:
|
||||
@echo $(MSG_END)
|
||||
@echo
|
||||
|
||||
|
||||
# Display size of file.
|
||||
sizebefore:
|
||||
@if [ -f $(TARGET).elf ]; then echo; echo $(MSG_SIZE_BEFORE); $(ELFSIZE); echo; fi
|
||||
|
||||
sizeafter:
|
||||
@if [ -f $(TARGET).elf ]; then echo; echo $(MSG_SIZE_AFTER); $(ELFSIZE); echo; fi
|
||||
|
||||
|
||||
|
||||
# Display compiler version information.
|
||||
gccversion :
|
||||
@$(CC) --version
|
||||
|
||||
|
||||
|
||||
|
||||
# Convert ELF to COFF for use in debugging / simulating in
|
||||
# AVR Studio or VMLAB.
|
||||
COFFCONVERT=$(OBJCOPY) --debugging \
|
||||
--change-section-address .data-0x800000 \
|
||||
--change-section-address .bss-0x800000 \
|
||||
--change-section-address .noinit-0x800000 \
|
||||
--change-section-address .eeprom-0x810000
|
||||
|
||||
|
||||
coff: $(TARGET).elf
|
||||
@echo
|
||||
@echo $(MSG_COFF) $(TARGET).cof
|
||||
$(COFFCONVERT) -O coff-avr $< $(TARGET).cof
|
||||
|
||||
|
||||
extcoff: $(TARGET).elf
|
||||
@echo
|
||||
@echo $(MSG_EXTENDED_COFF) $(TARGET).cof
|
||||
$(COFFCONVERT) -O coff-ext-avr $< $(TARGET).cof
|
||||
|
||||
|
||||
|
||||
|
||||
# Program the device.
|
||||
program: $(TARGET).hex $(TARGET).eep
|
||||
$(AVRDUDE) $(AVRDUDE_FLAGS) $(AVRDUDE_WRITE_FLASH) $(AVRDUDE_WRITE_EEPROM)
|
||||
|
||||
|
||||
|
||||
|
||||
# Create final output files (.hex, .eep) from ELF output file.
|
||||
%.hex: %.elf
|
||||
@echo
|
||||
@echo $(MSG_FLASH) $@
|
||||
$(OBJCOPY) -O $(FORMAT) -R .eeprom $< $@
|
||||
|
||||
%.eep: %.elf
|
||||
@echo
|
||||
@echo $(MSG_EEPROM) $@
|
||||
-$(OBJCOPY) -j .eeprom --set-section-flags=.eeprom="alloc,load" \
|
||||
--change-section-lma .eeprom=0 -O $(FORMAT) $< $@
|
||||
|
||||
# Create extended listing file from ELF output file.
|
||||
%.lss: %.elf
|
||||
@echo
|
||||
@echo $(MSG_EXTENDED_LISTING) $@
|
||||
$(OBJDUMP) -h -S $< > $@
|
||||
|
||||
# Create a symbol table from ELF output file.
|
||||
%.sym: %.elf
|
||||
@echo
|
||||
@echo $(MSG_SYMBOL_TABLE) $@
|
||||
avr-nm -n $< > $@
|
||||
|
||||
|
||||
|
||||
# Link: create ELF output file from object files.
|
||||
.SECONDARY : $(TARGET).elf
|
||||
.PRECIOUS : $(OBJ)
|
||||
%.elf: $(OBJ)
|
||||
@echo
|
||||
@echo $(MSG_LINKING) $@
|
||||
$(CC) $(ALL_CFLAGS) $(OBJ) --output $@ $(LDFLAGS)
|
||||
|
||||
|
||||
# Compile: create object files from C source files.
|
||||
%.o : %.c
|
||||
@echo
|
||||
@echo $(MSG_COMPILING) $<
|
||||
$(CC) -c $(ALL_CFLAGS) $< -o $@
|
||||
|
||||
|
||||
# Compile: create assembler files from C source files.
|
||||
%.s : %.c
|
||||
$(CC) -S $(ALL_CFLAGS) $< -o $@
|
||||
|
||||
|
||||
# Assemble: create object files from assembler source files.
|
||||
%.o : %.S
|
||||
@echo
|
||||
@echo $(MSG_ASSEMBLING) $<
|
||||
$(CC) -c $(ALL_ASFLAGS) $< -o $@
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
# Target: clean project.
|
||||
clean: begin clean_list finished end
|
||||
|
||||
clean_list :
|
||||
@echo
|
||||
@echo $(MSG_CLEANING)
|
||||
$(REMOVE) $(TARGET).hex
|
||||
$(REMOVE) $(TARGET).eep
|
||||
$(REMOVE) $(TARGET).obj
|
||||
$(REMOVE) $(TARGET).cof
|
||||
$(REMOVE) $(TARGET).elf
|
||||
$(REMOVE) $(TARGET).map
|
||||
$(REMOVE) $(TARGET).obj
|
||||
$(REMOVE) $(TARGET).a90
|
||||
$(REMOVE) $(TARGET).sym
|
||||
$(REMOVE) $(TARGET).lnk
|
||||
$(REMOVE) $(TARGET).lss
|
||||
$(REMOVE) $(OBJ)
|
||||
$(REMOVE) $(LST)
|
||||
$(REMOVE) $(SRC:.c=.s)
|
||||
$(REMOVE) $(SRC:.c=.d)
|
||||
|
||||
|
||||
# Automatically generate C source code dependencies.
|
||||
# (Code originally taken from the GNU make user manual and modified
|
||||
# (See README.txt Credits).)
|
||||
#
|
||||
# Note that this will work with sh (bash) and sed that is shipped with WinAVR
|
||||
# (see the SHELL variable defined above).
|
||||
# This may not work with other shells or other seds.
|
||||
#
|
||||
%.d: %.c
|
||||
set -e; $(CC) -MM $(ALL_CFLAGS) $< \
|
||||
| sed 's,\(.*\)\.o[ :]*,\1.o \1.d : ,g' > $@; \
|
||||
[ -s $@ ] || rm -f $@
|
||||
|
||||
|
||||
# Remove the '-' if you want to see the dependency files generated.
|
||||
-include $(SRC:.c=.d)
|
||||
|
||||
|
||||
|
||||
# Listing of phony targets.
|
||||
.PHONY : all begin finish end sizebefore sizeafter gccversion coff extcoff \
|
||||
clean clean_list program
|
||||
|
||||
|
|
@ -1,502 +0,0 @@
|
|||
# ----------------------------------------------------------------------------
|
||||
# Makefile to compile and link the TWImaster library and test program
|
||||
# Author: Peter Fleury
|
||||
# File: $Id: makefile.twimaster,v 1.1 2005/03/29 14:50:05 Peter Exp $
|
||||
# based on WinAVR Makefile Template written by Eric B. Weddington, Jörg Wunsch, et al.
|
||||
#
|
||||
# Adjust F_CPU below to the clock frequency in Mhz of your AVR target
|
||||
#
|
||||
# rename this file to "makefile" or invoke with "make -f makefile.twimaster"
|
||||
#
|
||||
#----------------------------------------------------------------------------
|
||||
# On command line:
|
||||
#
|
||||
# make all = Make software.
|
||||
#
|
||||
# make clean = Clean out built project files.
|
||||
#
|
||||
# make coff = Convert ELF to AVR COFF.
|
||||
#
|
||||
# make extcoff = Convert ELF to AVR Extended COFF.
|
||||
#
|
||||
# make program = Download the hex file to the device, using avrdude.
|
||||
# Please customize the avrdude settings below first!
|
||||
#
|
||||
# make debug = Start either simulavr or avarice as specified for debugging,
|
||||
# with avr-gdb or avr-insight as the front end for debugging.
|
||||
#
|
||||
# make filename.s = Just compile filename.c into the assembler code only.
|
||||
#
|
||||
# make filename.i = Create a preprocessed source file for use in submitting
|
||||
# bug reports to the GCC project.
|
||||
#
|
||||
# To rebuild project do "make clean" then "make all".
|
||||
#----------------------------------------------------------------------------
|
||||
|
||||
|
||||
# MCU name
|
||||
MCU = atmega8
|
||||
|
||||
|
||||
# Processor frequency.
|
||||
# This will define a symbol, F_CPU, in all source code files equal to the
|
||||
# processor frequency. You can then use this symbol in your source code to
|
||||
# calculate timings. Do NOT tack on a 'UL' at the end, this will be done
|
||||
# automatically to create a 32-bit value in your source code.
|
||||
F_CPU = 4000000
|
||||
|
||||
|
||||
# Output format. (can be srec, ihex, binary)
|
||||
FORMAT = ihex
|
||||
|
||||
|
||||
# Target file name (without extension).
|
||||
TARGET = test_i2cmaster
|
||||
|
||||
|
||||
# List C source files here. (C dependencies are automatically generated.)
|
||||
SRC = $(TARGET).c twimaster.c
|
||||
|
||||
|
||||
# List Assembler source files here.
|
||||
# Make them always end in a capital .S. Files ending in a lowercase .s
|
||||
# will not be considered source files but generated files (assembler
|
||||
# output from the compiler), and will be deleted upon "make clean"!
|
||||
# Even though the DOS/Win* filesystem matches both .s and .S the same,
|
||||
# it will preserve the spelling of the filenames, and gcc itself does
|
||||
# care about how the name is spelled on its command-line.
|
||||
ASRC =
|
||||
|
||||
|
||||
# Optimization level, can be [0, 1, 2, 3, s].
|
||||
# 0 = turn off optimization. s = optimize for size.
|
||||
# (Note: 3 is not always the best optimization level. See avr-libc FAQ.)
|
||||
OPT = s
|
||||
|
||||
|
||||
# Debugging format.
|
||||
# Native formats for AVR-GCC's -g are dwarf-2 [default] or stabs.
|
||||
# AVR Studio 4.10 requires dwarf-2.
|
||||
# AVR [Extended] COFF format requires stabs, plus an avr-objcopy run.
|
||||
DEBUG = dwarf-2
|
||||
|
||||
|
||||
# List any extra directories to look for include files here.
|
||||
# Each directory must be seperated by a space.
|
||||
# Use forward slashes for directory separators.
|
||||
# For a directory that has spaces, enclose it in quotes.
|
||||
EXTRAINCDIRS =
|
||||
|
||||
|
||||
# Compiler flag to set the C Standard level.
|
||||
# c89 = "ANSI" C
|
||||
# gnu89 = c89 plus GCC extensions
|
||||
# c99 = ISO C99 standard (not yet fully implemented)
|
||||
# gnu99 = c99 plus GCC extensions
|
||||
CSTANDARD = -std=gnu99
|
||||
|
||||
|
||||
# Place -D or -U options here
|
||||
CDEFS = -DF_CPU=$(F_CPU)UL
|
||||
|
||||
|
||||
# Place -I options here
|
||||
CINCS =
|
||||
|
||||
|
||||
|
||||
#---------------- Compiler Options ----------------
|
||||
# -g*: generate debugging information
|
||||
# -O*: optimization level
|
||||
# -f...: tuning, see GCC manual and avr-libc documentation
|
||||
# -Wall...: warning level
|
||||
# -Wa,...: tell GCC to pass this to the assembler.
|
||||
# -adhlns...: create assembler listing
|
||||
CFLAGS = -g$(DEBUG)
|
||||
CFLAGS += $(CDEFS) $(CINCS)
|
||||
CFLAGS += -O$(OPT)
|
||||
CFLAGS += -funsigned-char -funsigned-bitfields -fpack-struct -fshort-enums
|
||||
CFLAGS += -Wall -Wstrict-prototypes
|
||||
CFLAGS += -Wa,-adhlns=$(<:.c=.lst)
|
||||
CFLAGS += $(patsubst %,-I%,$(EXTRAINCDIRS))
|
||||
CFLAGS += $(CSTANDARD)
|
||||
|
||||
|
||||
#---------------- Assembler Options ----------------
|
||||
# -Wa,...: tell GCC to pass this to the assembler.
|
||||
# -ahlms: create listing
|
||||
# -gstabs: have the assembler create line number information; note that
|
||||
# for use in COFF files, additional information about filenames
|
||||
# and function names needs to be present in the assembler source
|
||||
# files -- see avr-libc docs [FIXME: not yet described there]
|
||||
ASFLAGS = -Wa,-adhlns=$(<:.S=.lst),-gstabs
|
||||
|
||||
|
||||
#---------------- Library Options ----------------
|
||||
# Minimalistic printf version
|
||||
PRINTF_LIB_MIN = -Wl,-u,vfprintf -lprintf_min
|
||||
|
||||
# Floating point printf version (requires MATH_LIB = -lm below)
|
||||
PRINTF_LIB_FLOAT = -Wl,-u,vfprintf -lprintf_flt
|
||||
|
||||
# If this is left blank, then it will use the Standard printf version.
|
||||
PRINTF_LIB =
|
||||
#PRINTF_LIB = $(PRINTF_LIB_MIN)
|
||||
#PRINTF_LIB = $(PRINTF_LIB_FLOAT)
|
||||
|
||||
|
||||
# Minimalistic scanf version
|
||||
SCANF_LIB_MIN = -Wl,-u,vfscanf -lscanf_min
|
||||
|
||||
# Floating point + %[ scanf version (requires MATH_LIB = -lm below)
|
||||
SCANF_LIB_FLOAT = -Wl,-u,vfscanf -lscanf_flt
|
||||
|
||||
# If this is left blank, then it will use the Standard scanf version.
|
||||
SCANF_LIB =
|
||||
#SCANF_LIB = $(SCANF_LIB_MIN)
|
||||
#SCANF_LIB = $(SCANF_LIB_FLOAT)
|
||||
|
||||
|
||||
MATH_LIB = -lm
|
||||
|
||||
|
||||
|
||||
#---------------- External Memory Options ----------------
|
||||
|
||||
# 64 KB of external RAM, starting after internal RAM (ATmega128!),
|
||||
# used for variables (.data/.bss) and heap (malloc()).
|
||||
#EXTMEMOPTS = -Wl,-Tdata=0x801100,--defsym=__heap_end=0x80ffff
|
||||
|
||||
# 64 KB of external RAM, starting after internal RAM (ATmega128!),
|
||||
# only used for heap (malloc()).
|
||||
#EXTMEMOPTS = -Wl,--defsym=__heap_start=0x801100,--defsym=__heap_end=0x80ffff
|
||||
|
||||
EXTMEMOPTS =
|
||||
|
||||
|
||||
|
||||
#---------------- Linker Options ----------------
|
||||
# -Wl,...: tell GCC to pass this to linker.
|
||||
# -Map: create map file
|
||||
# --cref: add cross reference to map file
|
||||
LDFLAGS = -Wl,-Map=$(TARGET).map,--cref
|
||||
LDFLAGS += $(EXTMEMOPTS)
|
||||
LDFLAGS += $(PRINTF_LIB) $(SCANF_LIB) $(MATH_LIB)
|
||||
|
||||
|
||||
|
||||
#---------------- Programming Options (avrdude) ----------------
|
||||
|
||||
# Programming hardware: alf avr910 avrisp bascom bsd
|
||||
# dt006 pavr picoweb pony-stk200 sp12 stk200 stk500
|
||||
#
|
||||
# Type: avrdude -c ?
|
||||
# to get a full listing.
|
||||
#
|
||||
AVRDUDE_PROGRAMMER = stk500
|
||||
|
||||
# com1 = serial port. Use lpt1 to connect to parallel port.
|
||||
AVRDUDE_PORT = com1 # programmer connected to serial device
|
||||
|
||||
AVRDUDE_WRITE_FLASH = -U flash:w:$(TARGET).hex
|
||||
#AVRDUDE_WRITE_EEPROM = -U eeprom:w:$(TARGET).eep
|
||||
|
||||
|
||||
# Uncomment the following if you want avrdude's erase cycle counter.
|
||||
# Note that this counter needs to be initialized first using -Yn,
|
||||
# see avrdude manual.
|
||||
#AVRDUDE_ERASE_COUNTER = -y
|
||||
|
||||
# Uncomment the following if you do /not/ wish a verification to be
|
||||
# performed after programming the device.
|
||||
#AVRDUDE_NO_VERIFY = -V
|
||||
|
||||
# Increase verbosity level. Please use this when submitting bug
|
||||
# reports about avrdude. See <http://savannah.nongnu.org/projects/avrdude>
|
||||
# to submit bug reports.
|
||||
#AVRDUDE_VERBOSE = -v -v
|
||||
|
||||
AVRDUDE_FLAGS = -p $(MCU) -P $(AVRDUDE_PORT) -c $(AVRDUDE_PROGRAMMER)
|
||||
AVRDUDE_FLAGS += $(AVRDUDE_NO_VERIFY)
|
||||
AVRDUDE_FLAGS += $(AVRDUDE_VERBOSE)
|
||||
AVRDUDE_FLAGS += $(AVRDUDE_ERASE_COUNTER)
|
||||
|
||||
|
||||
|
||||
#---------------- Debugging Options ----------------
|
||||
|
||||
# For simulavr only - target MCU frequency.
|
||||
DEBUG_MFREQ = $(F_CPU)
|
||||
|
||||
# Set the DEBUG_UI to either gdb or insight.
|
||||
# DEBUG_UI = gdb
|
||||
DEBUG_UI = insight
|
||||
|
||||
# Set the debugging back-end to either avarice, simulavr.
|
||||
DEBUG_BACKEND = avarice
|
||||
#DEBUG_BACKEND = simulavr
|
||||
|
||||
# GDB Init Filename.
|
||||
GDBINIT_FILE = __avr_gdbinit
|
||||
|
||||
# When using avarice settings for the JTAG
|
||||
JTAG_DEV = /dev/com1
|
||||
|
||||
# Debugging port used to communicate between GDB / avarice / simulavr.
|
||||
DEBUG_PORT = 4242
|
||||
|
||||
# Debugging host used to communicate between GDB / avarice / simulavr, normally
|
||||
# just set to localhost unless doing some sort of crazy debugging when
|
||||
# avarice is running on a different computer.
|
||||
DEBUG_HOST = localhost
|
||||
|
||||
|
||||
|
||||
#============================================================================
|
||||
|
||||
|
||||
# Define programs and commands.
|
||||
SHELL = sh
|
||||
CC = avr-gcc
|
||||
OBJCOPY = avr-objcopy
|
||||
OBJDUMP = avr-objdump
|
||||
SIZE = avr-size
|
||||
NM = avr-nm
|
||||
AVRDUDE = avrdude
|
||||
REMOVE = rm -f
|
||||
COPY = cp
|
||||
WINSHELL = cmd
|
||||
|
||||
|
||||
# Define Messages
|
||||
# English
|
||||
MSG_ERRORS_NONE = Errors: none
|
||||
MSG_BEGIN = -------- begin --------
|
||||
MSG_END = -------- end --------
|
||||
MSG_SIZE_BEFORE = Size before:
|
||||
MSG_SIZE_AFTER = Size after:
|
||||
MSG_COFF = Converting to AVR COFF:
|
||||
MSG_EXTENDED_COFF = Converting to AVR Extended COFF:
|
||||
MSG_FLASH = Creating load file for Flash:
|
||||
MSG_EEPROM = Creating load file for EEPROM:
|
||||
MSG_EXTENDED_LISTING = Creating Extended Listing:
|
||||
MSG_SYMBOL_TABLE = Creating Symbol Table:
|
||||
MSG_LINKING = Linking:
|
||||
MSG_COMPILING = Compiling:
|
||||
MSG_ASSEMBLING = Assembling:
|
||||
MSG_CLEANING = Cleaning project:
|
||||
|
||||
|
||||
|
||||
|
||||
# Define all object files.
|
||||
OBJ = $(SRC:.c=.o) $(ASRC:.S=.o)
|
||||
|
||||
# Define all listing files.
|
||||
LST = $(SRC:.c=.lst) $(ASRC:.S=.lst)
|
||||
|
||||
|
||||
# Compiler flags to generate dependency files.
|
||||
GENDEPFLAGS = -MD -MP -MF .dep/$(@F).d
|
||||
|
||||
|
||||
# Combine all necessary flags and optional flags.
|
||||
# Add target processor to flags.
|
||||
ALL_CFLAGS = -mmcu=$(MCU) -I. $(CFLAGS) $(GENDEPFLAGS)
|
||||
ALL_ASFLAGS = -mmcu=$(MCU) -I. -x assembler-with-cpp $(ASFLAGS)
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
# Default target.
|
||||
all: begin gccversion sizebefore build sizeafter end
|
||||
|
||||
build: elf hex eep lss sym
|
||||
|
||||
elf: $(TARGET).elf
|
||||
hex: $(TARGET).hex
|
||||
eep: $(TARGET).eep
|
||||
lss: $(TARGET).lss
|
||||
sym: $(TARGET).sym
|
||||
|
||||
|
||||
|
||||
# Eye candy.
|
||||
# AVR Studio 3.x does not check make's exit code but relies on
|
||||
# the following magic strings to be generated by the compile job.
|
||||
begin:
|
||||
@echo
|
||||
@echo $(MSG_BEGIN)
|
||||
|
||||
end:
|
||||
@echo $(MSG_END)
|
||||
@echo
|
||||
|
||||
|
||||
# Display size of file.
|
||||
HEXSIZE = $(SIZE) --target=$(FORMAT) $(TARGET).hex
|
||||
ELFSIZE = $(SIZE) -A $(TARGET).elf
|
||||
AVRMEM = avr-mem.sh $(TARGET).elf $(MCU)
|
||||
|
||||
sizebefore:
|
||||
@if test -f $(TARGET).elf; then echo; echo $(MSG_SIZE_BEFORE); $(ELFSIZE); \
|
||||
$(AVRMEM) 2>/dev/null; echo; fi
|
||||
|
||||
sizeafter:
|
||||
@if test -f $(TARGET).elf; then echo; echo $(MSG_SIZE_AFTER); $(ELFSIZE); \
|
||||
$(AVRMEM) 2>/dev/null; echo; fi
|
||||
|
||||
|
||||
|
||||
# Display compiler version information.
|
||||
gccversion :
|
||||
@$(CC) --version
|
||||
|
||||
|
||||
|
||||
# Program the device.
|
||||
program: $(TARGET).hex $(TARGET).eep
|
||||
$(AVRDUDE) $(AVRDUDE_FLAGS) $(AVRDUDE_WRITE_FLASH) $(AVRDUDE_WRITE_EEPROM)
|
||||
|
||||
|
||||
# Generate avr-gdb config/init file which does the following:
|
||||
# define the reset signal, load the target file, connect to target, and set
|
||||
# a breakpoint at main().
|
||||
gdb-config:
|
||||
@$(REMOVE) $(GDBINIT_FILE)
|
||||
@echo define reset >> $(GDBINIT_FILE)
|
||||
@echo SIGNAL SIGHUP >> $(GDBINIT_FILE)
|
||||
@echo end >> $(GDBINIT_FILE)
|
||||
@echo file $(TARGET).elf >> $(GDBINIT_FILE)
|
||||
@echo target remote $(DEBUG_HOST):$(DEBUG_PORT) >> $(GDBINIT_FILE)
|
||||
ifeq ($(DEBUG_BACKEND),simulavr)
|
||||
@echo load >> $(GDBINIT_FILE)
|
||||
endif
|
||||
@echo break main >> $(GDBINIT_FILE)
|
||||
|
||||
debug: gdb-config $(TARGET).elf
|
||||
ifeq ($(DEBUG_BACKEND), avarice)
|
||||
@echo Starting AVaRICE - Press enter when "waiting to connect" message displays.
|
||||
@$(WINSHELL) /c start avarice --jtag $(JTAG_DEV) --erase --program --file \
|
||||
$(TARGET).elf $(DEBUG_HOST):$(DEBUG_PORT)
|
||||
@$(WINSHELL) /c pause
|
||||
|
||||
else
|
||||
@$(WINSHELL) /c start simulavr --gdbserver --device $(MCU) --clock-freq \
|
||||
$(DEBUG_MFREQ) --port $(DEBUG_PORT)
|
||||
endif
|
||||
@$(WINSHELL) /c start avr-$(DEBUG_UI) --command=$(GDBINIT_FILE)
|
||||
|
||||
|
||||
|
||||
|
||||
# Convert ELF to COFF for use in debugging / simulating in AVR Studio or VMLAB.
|
||||
COFFCONVERT=$(OBJCOPY) --debugging \
|
||||
--change-section-address .data-0x800000 \
|
||||
--change-section-address .bss-0x800000 \
|
||||
--change-section-address .noinit-0x800000 \
|
||||
--change-section-address .eeprom-0x810000
|
||||
|
||||
|
||||
coff: $(TARGET).elf
|
||||
@echo
|
||||
@echo $(MSG_COFF) $(TARGET).cof
|
||||
$(COFFCONVERT) -O coff-avr $< $(TARGET).cof
|
||||
|
||||
|
||||
extcoff: $(TARGET).elf
|
||||
@echo
|
||||
@echo $(MSG_EXTENDED_COFF) $(TARGET).cof
|
||||
$(COFFCONVERT) -O coff-ext-avr $< $(TARGET).cof
|
||||
|
||||
|
||||
|
||||
# Create final output files (.hex, .eep) from ELF output file.
|
||||
%.hex: %.elf
|
||||
@echo
|
||||
@echo $(MSG_FLASH) $@
|
||||
$(OBJCOPY) -O $(FORMAT) -R .eeprom $< $@
|
||||
|
||||
%.eep: %.elf
|
||||
@echo
|
||||
@echo $(MSG_EEPROM) $@
|
||||
-$(OBJCOPY) -j .eeprom --set-section-flags=.eeprom="alloc,load" \
|
||||
--change-section-lma .eeprom=0 -O $(FORMAT) $< $@
|
||||
|
||||
# Create extended listing file from ELF output file.
|
||||
%.lss: %.elf
|
||||
@echo
|
||||
@echo $(MSG_EXTENDED_LISTING) $@
|
||||
$(OBJDUMP) -h -S $< > $@
|
||||
|
||||
# Create a symbol table from ELF output file.
|
||||
%.sym: %.elf
|
||||
@echo
|
||||
@echo $(MSG_SYMBOL_TABLE) $@
|
||||
$(NM) -n $< > $@
|
||||
|
||||
|
||||
|
||||
# Link: create ELF output file from object files.
|
||||
.SECONDARY : $(TARGET).elf
|
||||
.PRECIOUS : $(OBJ)
|
||||
%.elf: $(OBJ)
|
||||
@echo
|
||||
@echo $(MSG_LINKING) $@
|
||||
$(CC) $(ALL_CFLAGS) $^ --output $@ $(LDFLAGS)
|
||||
|
||||
|
||||
# Compile: create object files from C source files.
|
||||
%.o : %.c
|
||||
@echo
|
||||
@echo $(MSG_COMPILING) $<
|
||||
$(CC) -c $(ALL_CFLAGS) $< -o $@
|
||||
|
||||
|
||||
# Compile: create assembler files from C source files.
|
||||
%.s : %.c
|
||||
$(CC) -S $(ALL_CFLAGS) $< -o $@
|
||||
|
||||
|
||||
# Assemble: create object files from assembler source files.
|
||||
%.o : %.S
|
||||
@echo
|
||||
@echo $(MSG_ASSEMBLING) $<
|
||||
$(CC) -c $(ALL_ASFLAGS) $< -o $@
|
||||
|
||||
# Create preprocessed source for use in sending a bug report.
|
||||
%.i : %.c
|
||||
$(CC) -E -mmcu=$(MCU) -I. $(CFLAGS) $< -o $@
|
||||
|
||||
|
||||
# Target: clean project.
|
||||
clean: begin clean_list end
|
||||
|
||||
clean_list :
|
||||
@echo
|
||||
@echo $(MSG_CLEANING)
|
||||
$(REMOVE) $(TARGET).hex
|
||||
$(REMOVE) $(TARGET).eep
|
||||
$(REMOVE) $(TARGET).cof
|
||||
$(REMOVE) $(TARGET).elf
|
||||
$(REMOVE) $(TARGET).map
|
||||
$(REMOVE) $(TARGET).sym
|
||||
$(REMOVE) $(TARGET).lss
|
||||
$(REMOVE) $(OBJ)
|
||||
$(REMOVE) $(LST)
|
||||
$(REMOVE) $(SRC:.c=.s)
|
||||
$(REMOVE) $(SRC:.c=.d)
|
||||
$(REMOVE) .dep/*
|
||||
|
||||
|
||||
|
||||
# Include the dependency files.
|
||||
-include $(shell mkdir .dep 2>/dev/null) $(wildcard .dep/*)
|
||||
|
||||
|
||||
# Listing of phony targets.
|
||||
.PHONY : all begin finish end sizebefore sizeafter gccversion \
|
||||
build elf hex eep lss sym coff extcoff \
|
||||
clean clean_list program debug gdb-config
|
||||
|
||||
|
|
@ -1,78 +0,0 @@
|
|||
/****************************************************************************
|
||||
Title: Access serial EEPROM 24C02 using I2C interace
|
||||
Author: Peter Fleury <pfleury@gmx.ch> http://jump.to/fleury
|
||||
File: $Id: test_i2cmaster.c,v 1.2 2003/12/06 17:07:18 peter Exp $
|
||||
Software: AVR-GCC 3.3
|
||||
Hardware: AT90S8515 at 4 Mhz, any AVR device can be used
|
||||
|
||||
Description:
|
||||
This example shows how the I2C library i2cmaster.S can be used to
|
||||
access a serial eeprom.
|
||||
Based on Atmel Application Note AVR300, adapted to AVR-GCC C interface
|
||||
|
||||
*****************************************************************************/
|
||||
#include <avr/io.h>
|
||||
#include "i2cmaster.h"
|
||||
|
||||
|
||||
#define Dev24C02 0xA2 // device address of EEPROM 24C02, see datasheet
|
||||
|
||||
|
||||
int main(void)
|
||||
{
|
||||
unsigned char ret;
|
||||
|
||||
|
||||
DDRB = 0xff; // use all pins on port B for output
|
||||
PORTB = 0xff; // (active low LED's )
|
||||
|
||||
i2c_init(); // init I2C interface
|
||||
|
||||
/* write 0x75 to eeprom address 0x05 (Byte Write) */
|
||||
ret = i2c_start(Dev24C02+I2C_WRITE); // set device address and write mode
|
||||
if ( ret ) {
|
||||
/* failed to issue start condition, possibly no device found */
|
||||
i2c_stop();
|
||||
PORTB=0x00; // activate all 8 LED to show error */
|
||||
}else {
|
||||
/* issuing start condition ok, device accessible */
|
||||
i2c_write(0x05); // write address = 5
|
||||
i2c_write(0x75); // ret=0 -> Ok, ret=1 -> no ACK
|
||||
i2c_stop(); // set stop conditon = release bus
|
||||
|
||||
/* write ok, read value back from eeprom address 0x05, wait until
|
||||
the device is no longer busy from the previous write operation */
|
||||
i2c_start_wait(Dev24C02+I2C_WRITE); // set device address and write mode
|
||||
i2c_write(0x05); // write address = 5
|
||||
i2c_rep_start(Dev24C02+I2C_READ); // set device address and read mode
|
||||
ret = i2c_readNak(); // read one byte
|
||||
i2c_stop();
|
||||
|
||||
PORTB = ~ret; // output byte on the LED's
|
||||
|
||||
/* write 0x70,0x71,072,073 to eeprom address 0x00..0x03 (Page Write),
|
||||
wait until the device is no longer busy from the previous write operation */
|
||||
i2c_start_wait(Dev24C02+I2C_WRITE); // set device address and write mode
|
||||
i2c_write(0x00); // write start address = 0
|
||||
i2c_write(0x70); // write data to address 0
|
||||
i2c_write(0x71); // " " " " 1
|
||||
i2c_write(0x72); // " " " " 2
|
||||
i2c_write(0x74); // " " " " 3
|
||||
i2c_stop(); // set stop conditon = release bus
|
||||
|
||||
/* write ok, read value back from eeprom address 0..3 (Sequencial Read),
|
||||
wait until the device is no longer busy from the previous write operation */
|
||||
i2c_start_wait(Dev24C02+I2C_WRITE); // set device address and write mode
|
||||
i2c_write(0x00); // write address = 0
|
||||
i2c_rep_start(Dev24C02+I2C_READ); // set device address and read mode
|
||||
ret = i2c_readAck(); // read one byte form address 0
|
||||
ret = i2c_readAck(); // " " " " " 1
|
||||
ret = i2c_readAck(); // " " " " " 2
|
||||
ret = i2c_readNak(); // " " " " " 3
|
||||
i2c_stop(); // set stop condition = release bus
|
||||
|
||||
PORTB = ~ret; // output byte on the LED's
|
||||
}
|
||||
|
||||
for(;;);
|
||||
}
|
||||
|
|
@ -1,202 +0,0 @@
|
|||
/*************************************************************************
|
||||
* Title: I2C master library using hardware TWI interface
|
||||
* Author: Peter Fleury <pfleury@gmx.ch> http://jump.to/fleury
|
||||
* File: $Id: twimaster.c,v 1.3 2005/07/02 11:14:21 Peter Exp $
|
||||
* Software: AVR-GCC 3.4.3 / avr-libc 1.2.3
|
||||
* Target: any AVR device with hardware TWI
|
||||
* Usage: API compatible with I2C Software Library i2cmaster.h
|
||||
**************************************************************************/
|
||||
#include <inttypes.h>
|
||||
#include <compat/twi.h>
|
||||
|
||||
#include "i2cmaster.h"
|
||||
|
||||
|
||||
/* define CPU frequency in Mhz here if not defined in Makefile */
|
||||
#ifndef F_CPU
|
||||
#define F_CPU 4000000UL
|
||||
#endif
|
||||
|
||||
/* I2C clock in Hz */
|
||||
#define SCL_CLOCK 400000 // previously set to 100000L ::2012, Ben Blazak::
|
||||
|
||||
|
||||
/*************************************************************************
|
||||
Initialization of the I2C bus interface. Need to be called only once
|
||||
*************************************************************************/
|
||||
void i2c_init(void)
|
||||
{
|
||||
/* initialize TWI clock: 100 kHz clock, TWPS = 0 => prescaler = 1 */
|
||||
|
||||
TWSR = 0; /* no prescaler */
|
||||
TWBR = ((F_CPU/SCL_CLOCK)-16)/2; /* must be > 10 for stable operation */
|
||||
|
||||
}/* i2c_init */
|
||||
|
||||
|
||||
/*************************************************************************
|
||||
Issues a start condition and sends address and transfer direction.
|
||||
return 0 = device accessible, 1= failed to access device
|
||||
*************************************************************************/
|
||||
unsigned char i2c_start(unsigned char address)
|
||||
{
|
||||
uint8_t twst;
|
||||
|
||||
// send START condition
|
||||
TWCR = (1<<TWINT) | (1<<TWSTA) | (1<<TWEN);
|
||||
|
||||
// wait until transmission completed
|
||||
while(!(TWCR & (1<<TWINT)));
|
||||
|
||||
// check value of TWI Status Register. Mask prescaler bits.
|
||||
twst = TW_STATUS & 0xF8;
|
||||
if ( (twst != TW_START) && (twst != TW_REP_START)) return 1;
|
||||
|
||||
// send device address
|
||||
TWDR = address;
|
||||
TWCR = (1<<TWINT) | (1<<TWEN);
|
||||
|
||||
// wail until transmission completed and ACK/NACK has been received
|
||||
while(!(TWCR & (1<<TWINT)));
|
||||
|
||||
// check value of TWI Status Register. Mask prescaler bits.
|
||||
twst = TW_STATUS & 0xF8;
|
||||
if ( (twst != TW_MT_SLA_ACK) && (twst != TW_MR_SLA_ACK) ) return 1;
|
||||
|
||||
return 0;
|
||||
|
||||
}/* i2c_start */
|
||||
|
||||
|
||||
/*************************************************************************
|
||||
Issues a start condition and sends address and transfer direction.
|
||||
If device is busy, use ack polling to wait until device is ready
|
||||
|
||||
Input: address and transfer direction of I2C device
|
||||
*************************************************************************/
|
||||
void i2c_start_wait(unsigned char address)
|
||||
{
|
||||
uint8_t twst;
|
||||
|
||||
|
||||
while ( 1 )
|
||||
{
|
||||
// send START condition
|
||||
TWCR = (1<<TWINT) | (1<<TWSTA) | (1<<TWEN);
|
||||
|
||||
// wait until transmission completed
|
||||
while(!(TWCR & (1<<TWINT)));
|
||||
|
||||
// check value of TWI Status Register. Mask prescaler bits.
|
||||
twst = TW_STATUS & 0xF8;
|
||||
if ( (twst != TW_START) && (twst != TW_REP_START)) continue;
|
||||
|
||||
// send device address
|
||||
TWDR = address;
|
||||
TWCR = (1<<TWINT) | (1<<TWEN);
|
||||
|
||||
// wail until transmission completed
|
||||
while(!(TWCR & (1<<TWINT)));
|
||||
|
||||
// check value of TWI Status Register. Mask prescaler bits.
|
||||
twst = TW_STATUS & 0xF8;
|
||||
if ( (twst == TW_MT_SLA_NACK )||(twst ==TW_MR_DATA_NACK) )
|
||||
{
|
||||
/* device busy, send stop condition to terminate write operation */
|
||||
TWCR = (1<<TWINT) | (1<<TWEN) | (1<<TWSTO);
|
||||
|
||||
// wait until stop condition is executed and bus released
|
||||
while(TWCR & (1<<TWSTO));
|
||||
|
||||
continue;
|
||||
}
|
||||
//if( twst != TW_MT_SLA_ACK) return 1;
|
||||
break;
|
||||
}
|
||||
|
||||
}/* i2c_start_wait */
|
||||
|
||||
|
||||
/*************************************************************************
|
||||
Issues a repeated start condition and sends address and transfer direction
|
||||
|
||||
Input: address and transfer direction of I2C device
|
||||
|
||||
Return: 0 device accessible
|
||||
1 failed to access device
|
||||
*************************************************************************/
|
||||
unsigned char i2c_rep_start(unsigned char address)
|
||||
{
|
||||
return i2c_start( address );
|
||||
|
||||
}/* i2c_rep_start */
|
||||
|
||||
|
||||
/*************************************************************************
|
||||
Terminates the data transfer and releases the I2C bus
|
||||
*************************************************************************/
|
||||
void i2c_stop(void)
|
||||
{
|
||||
/* send stop condition */
|
||||
TWCR = (1<<TWINT) | (1<<TWEN) | (1<<TWSTO);
|
||||
|
||||
// wait until stop condition is executed and bus released
|
||||
while(TWCR & (1<<TWSTO));
|
||||
|
||||
}/* i2c_stop */
|
||||
|
||||
|
||||
/*************************************************************************
|
||||
Send one byte to I2C device
|
||||
|
||||
Input: byte to be transfered
|
||||
Return: 0 write successful
|
||||
1 write failed
|
||||
*************************************************************************/
|
||||
unsigned char i2c_write( unsigned char data )
|
||||
{
|
||||
uint8_t twst;
|
||||
|
||||
// send data to the previously addressed device
|
||||
TWDR = data;
|
||||
TWCR = (1<<TWINT) | (1<<TWEN);
|
||||
|
||||
// wait until transmission completed
|
||||
while(!(TWCR & (1<<TWINT)));
|
||||
|
||||
// check value of TWI Status Register. Mask prescaler bits
|
||||
twst = TW_STATUS & 0xF8;
|
||||
if( twst != TW_MT_DATA_ACK) return 1;
|
||||
return 0;
|
||||
|
||||
}/* i2c_write */
|
||||
|
||||
|
||||
/*************************************************************************
|
||||
Read one byte from the I2C device, request more data from device
|
||||
|
||||
Return: byte read from I2C device
|
||||
*************************************************************************/
|
||||
unsigned char i2c_readAck(void)
|
||||
{
|
||||
TWCR = (1<<TWINT) | (1<<TWEN) | (1<<TWEA);
|
||||
while(!(TWCR & (1<<TWINT)));
|
||||
|
||||
return TWDR;
|
||||
|
||||
}/* i2c_readAck */
|
||||
|
||||
|
||||
/*************************************************************************
|
||||
Read one byte from the I2C device, read is followed by a stop condition
|
||||
|
||||
Return: byte read from I2C device
|
||||
*************************************************************************/
|
||||
unsigned char i2c_readNak(void)
|
||||
{
|
||||
TWCR = (1<<TWINT) | (1<<TWEN);
|
||||
while(!(TWCR & (1<<TWINT)));
|
||||
|
||||
return TWDR;
|
||||
|
||||
}/* i2c_readNak */
|
||||
|
|
@ -1,34 +1,11 @@
|
|||
<!--
|
||||
TODO: move the links into references if they're going to disappear from here
|
||||
-->
|
||||
# src/lib-other
|
||||
Files taken from other projects
|
||||
|
||||
## links to original files
|
||||
|
||||
* [pjrc] (http://pjrc.com/teensy/)
|
||||
* [blinky] (http://pjrc.com/teensy/blinky.zip)
|
||||
* [usb_keyboard] (http://pjrc.com/teensy/usb_keyboard.zip)
|
||||
|
||||
* [peter-fleury] (http://homepage.hispeed.ch/peterfleury/)
|
||||
* note: This code is licensed under the GNU GPL
|
||||
(per [the author's web site]
|
||||
(http://homepage.hispeed.ch/peterfleury/avr-software.html)).
|
||||
The MIT License is compatible with GPL
|
||||
(see [the Wikipedia entry]
|
||||
(http://en.wikipedia.org/wiki/MIT_License),
|
||||
and [the list of compatible licenses]
|
||||
(http://www.gnu.org/licenses/license-list.html#GPLCompatibleLicenses)
|
||||
on <http://www.gnu.org/>).
|
||||
* [i2cmaster] (http://homepage.hispeed.ch/peterfleury/i2cmaster.zip)
|
||||
|
||||
* [arduino] (https://github.com/arduino)
|
||||
* [arduino] (https://github.com/arduino/Arduino)
|
||||
* .../twi.c and .../twi.h
|
||||
* note: The version here is from the Ubuntu package, so it's probably
|
||||
old. The (new) version from github has dependencies galore on random
|
||||
other Arduino files, so it wasn't really usable.
|
||||
|
||||
-------------------------------------------------------------------------------
|
||||
|
||||
Copyright © 2012 Ben Blazak <benblazak.dev@gmail.com>
|
||||
|
|
|
|||
|
|
@ -52,7 +52,7 @@ int main(void) {
|
|||
if (counter == 0)
|
||||
_toggle_led3();
|
||||
counter++;
|
||||
if (counter >= 1000)
|
||||
if (counter >= 250)
|
||||
counter = 0;
|
||||
///
|
||||
static uint8_t current_layer = 0;
|
||||
|
|
|
|||
|
|
@ -18,7 +18,7 @@ SRC = $(shell find -maxdepth 1 -name '*.c') \
|
|||
|
||||
EXTRAINCDIRS = .
|
||||
|
||||
TEENSY_MAKE = $(MAKE) -f 'lib-other/pjrc/blinky/Makefile' \
|
||||
TEENSY_MAKE = $(MAKE) -f 'lib-other/pjrc/usb_keyboard/Makefile' \
|
||||
TARGET='$(TARGET)' \
|
||||
SRC='$(SRC)' \
|
||||
EXTRAINCDIRS='$(EXTRAINCDIRS)'
|
||||
|
|
|
|||
|
|
@ -0,0 +1,12 @@
|
|||
# src/test
|
||||
Files used for testing (at some point)
|
||||
|
||||
* I'm keeping these around for reference; they probably won't be maintained,
|
||||
and are quite likely to become broken at some point in the future.
|
||||
|
||||
-------------------------------------------------------------------------------
|
||||
|
||||
Copyright © 2012 Ben Blazak <benblazak.dev@gmail.com>
|
||||
Released under The MIT License (MIT) (see "license.md")
|
||||
Project located at <https://github.com/benblazak/ergodox-firmware>
|
||||
|
||||
Loading…
Reference in New Issue