mostly: figured out how to initialize the LEDs with PWM
Ben Blazak
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6fb3bf7a57
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37b504adfe
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@ -73,6 +73,9 @@
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(http://svn.savannah.nongnu.org/viewvc/trunk/avr-libc/include/avr/iom32u4.h?revision=2288&root=avr-libc&view=markup)
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: list of registers and associated bit numbers for ATmega32U4
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* [A Brief Tutorial on Programming the AVR without Arduino] by Chris Kuethe
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(https://www.mainframe.cx/~ckuethe/avr-c-tutorial/)
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## Articles / Tutorials
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@ -1,4 +1,5 @@
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# [ergodox-firmware][1]: Firmware for the [ergoDOX keyboard][2]
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[1]: https://github.com/benblazak/ergodox-firmware
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[2]: http://geekhack.org/showthread.php?22780-Interest-Check-Custom-split-ergo-keyboard
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# [ergodox-firmware][]: Firmware for the [ergoDOX keyboard][]
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[ergodox-firmware]: https://github.com/benblazak/ergodox-firmware
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[ergodox keyboard]: http://geekhack.org/showthread.php?22780-Interest-Check-Custom-split-ergo-keyboard
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@ -8,9 +8,9 @@
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* ------------------------------------------------------------------------- */
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// ----------------------------------------------------------------------------
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// documentation
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// ----------------------------------------------------------------------------
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/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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* ~~~ documentation ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
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/* ----------------------------------------------------------------------------
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* Matrix [row.column] assignments
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@ -36,16 +36,16 @@
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#include "ergodox.h"
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// ----------------------------------------------------------------------------
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// macros
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// ----------------------------------------------------------------------------
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/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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* ~~~ macros ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
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// TODO
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// ----------------------------------------------------------------------------
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// variables
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// ----------------------------------------------------------------------------
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/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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* ~~~ variables ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
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uint8_t kb_is_pressed[KB_ROWS][KB_COLUMNS] = {
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// --- right hand ---
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@ -87,9 +87,9 @@ uint8_t kb_maps[KB_LAYERS][KB_ROWS][KB_COLUMNS] = {
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0, 0, 0, 0, 0, 0, 0, //row 0xB
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}
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// ----------------------------------------------------------------------------
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// functions
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// ----------------------------------------------------------------------------
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/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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* ~~~ functions ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
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// TODO
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void kb_init() {
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@ -8,9 +8,9 @@
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* ------------------------------------------------------------------------- */
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// ----------------------------------------------------------------------------
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// documentation
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// ----------------------------------------------------------------------------
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/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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* ~~~ documentation ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
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/* ----------------------------------------------------------------------------
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* Pinouts and Pin assignments
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@ -68,6 +68,12 @@
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* column4 PD3 + + PB4 column0
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* column1 PC6 + + PD7 column5
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* column2 PC7 +-o-o-o-o-o-o
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*
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* notes:
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* - SCL and SDA: Need external pull-up resistors. Sometimes the internal
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* pull-ups are enough (see datasheet section 20.5.1), but i think for this
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* project we'll want external ones, in case people want to separate the
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* halves very far.
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* ----------------------------------------------------------------------------
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* MCP32018 Pin Assignments
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* ========================
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@ -91,10 +97,51 @@
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* - note: The user-defined bits are the three least significant
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* ------------------------------------------------------------------------- */
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/* ----------------------------------------------------------------------------
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* Registers
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* ----------------------------------------------------------------------------
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* General I/O (see datasheet section 10.2.1)
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*
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* DDRxn function PINxn function
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* 1 output 1 drive high
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* 0 drive low
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* 0 input 1 internal pull-up on
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* 0 internal pull-up off
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*
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* notes:
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* - Unused pins should be set as input with internal pullup enabled (see
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* datasheet section 10.2.6).
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* ----------------------------------------------------------------------------
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* PWM on ports OC1(A|B|C) (see datasheet section 14.10)
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*
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* notes:
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* - PWM pins should be set as outputs.
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* - we want Waveform Generation Mode 15
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* (fast PWM, TOP = OCRnA)
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* (see table 14-5)
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* - set (TCCRB[4,3],TCCRA[1,0]) to (1,1,1,1)
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* - we want "Compare Output Mode, Fast PWM" to be 0b10
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* "Clear OCnA/OCnB/OCnC on compare match, set OCnA/OCnB/OCnC at TOP"
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* (see table 14-3)
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* this way higher values of OCR1(A|B|C) will mean longer 'on' times for the
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* LEDs
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* - when in a fast PWM mode, set (TCCR1A[7,6,5,4,3,2]) to (1,0,1,0,1,0)
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* - we want "Clock Select Bit Description" to be 0b001
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* "clkI/O/1 (No prescaling)"
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* (see table 14-6)
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* - set (TCCR1B[2,1,0]) to (0,0,1)
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* - LEDs will be at minimum brightness until OCR1(A|B|C) are changed (since
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* the default value of all the bits in those registers is 0)
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*
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* abbreviations:
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* - OC = Output Compare
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* - TCCR = Timer/Counter Control Register
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* ------------------------------------------------------------------------- */
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// ----------------------------------------------------------------------------
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// macros
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// ----------------------------------------------------------------------------
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/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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* ~~~ macros ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
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// processor frequency (from <http://www.pjrc.com/teensy/prescaler.html>)
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#define CPU_PRESCALE(n) (CLKPR = 0x80, CLKPR = (n))
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@ -108,6 +155,20 @@
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#define CPU_125kHz 0x07
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#define CPU_62kHz 0x08
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// pins
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#define CONTROLLER_LED1_ON (OCR1A = 0xFFFF)
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#define CONTROLLER_LED1_OFF (OCR1A = 0)
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#define CONTROLLER_LED1_SET(n) (OCR1A = (n))
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#define CONTROLLER_LED1_SET_PERCENT(n) (OCR1A = (n) * 0xFFFF)
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#define CONTROLLER_LED2_ON (OCR1B = 0xFFFF)
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#define CONTROLLER_LED2_OFF (OCR1B = 0)
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#define CONTROLLER_LED2_SET(n) (OCR1B = (n))
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#define CONTROLLER_LED2_SET_PERCENT(n) (OCR1B = (n) * 0xFFFF)
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#define CONTROLLER_LED3_ON (OCR1C = 0xFFFF)
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#define CONTROLLER_LED3_OFF (OCR1C = 0)
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#define CONTROLLER_LED3_SET(n) (OCR1C = (n))
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#define CONTROLLER_LED3_SET_PERCENT(n) (OCR1C = (n) * 0xFFFF)
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// teensy pins
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// TODO
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// I2C SCL PD0
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@ -115,6 +176,12 @@
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// LED1 OC1A PB5
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// LED2 OC1B PB6
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// LED3 OC1C PB7
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// ROW_0 PF0
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// ROW_1 PF1
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// ROW_2 PF4
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// ROW_3 PF5
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// ROW_4 PF6
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// ROW_5 PF7
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// COLUMN_0_RH PB4
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// COLUMN_1_RH PC6
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// COLUMN_2_RH PC7
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@ -122,17 +189,17 @@
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// COLUMN_4_RH PD3
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// COLUMN_5_RH PD7
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// COLUMN_6_RH PB0
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// ROW_0 PF0
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// ROW_1 PF1
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// ROW_2 PF4
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// ROW_3 PF5
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// ROW_4 PF6
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// ROW_5 PF7
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// mcp23018 pins
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// TODO
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// I2C SCL
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// I2C SDA
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// ROW_6 GPA0
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// ROW_7 GPA1
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// ROW_8 GPA2
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// ROW_9 GPA3
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// ROW_A GPA4
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// ROW_B GPA5
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// COLUMN_0_LH GPB0
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// COLUMN_1_LH GPB1
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// COLUMN_2_LH GPB2
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@ -140,57 +207,43 @@
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// COLUMN_4_LH GPB4
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// COLUMN_5_LH GPB5
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// COLUMN_6_LH GPB6
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// ROW_6 GPA0
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// ROW_7 GPA1
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// ROW_8 GPA2
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// ROW_9 GPA3
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// ROW_A GPA4
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// ROW_B GPA5
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// pins logically common to both
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// TODO
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// (i don't think we're going to use these this way...)
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// COLUMN_0 GPB0
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// COLUMN_0 PB4
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// COLUMN_1 GPB1
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// COLUMN_1 PC6
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// COLUMN_2 GPB2
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// COLUMN_2 PC7
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// COLUMN_3 GPB3
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// COLUMN_3 PD2
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// COLUMN_4 GPB4
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// COLUMN_4 PD3
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// COLUMN_5 GPB5
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// COLUMN_5 PD7
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// COLUMN_6 GPB6
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// COLUMN_6 PB0
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/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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* ~~~ functions ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
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// ----------------------------------------------------------------------------
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// functions
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// ----------------------------------------------------------------------------
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void controller_init() {
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teensy_init();
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mcp23018_init();
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}
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// TODO
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// - set internal brown-out detection circuit?
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void controller_init() {
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// teensy
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// --- processor frequency
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void teensy_init() {
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CPU_PRESCALE(CPU_16MHz); // speed should match F_CPU in makefile
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// --- pins
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// --- --- unused: set as input with internal pullup enabled (see
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// teensy 2.0 datasheet section 10.2.6)
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// unused pins
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DDRB &= ~0b00001110; // set B(1,2,3) as input
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PORTB |= 0b00001110; // set B(1,2,3) internal pullup enabled
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DDRD &= ~0b01110000; // set D(4,5,6) as input
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PORTD |= 0b01110000; // set D(4,5,6) internal pullup enabled
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DDRE &= ~0b01000000; // set E(6) as input
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PORTE |= 0b01000000; // set E(6) internal pullup enabled
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// --- --- [used]
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// TODO
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// mcp32018
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// TODO
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// LEDs with PWM
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DDRB |= 0b11100000; // set B(5,6,7) as output
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TCCR1A = 0b10101011; // set and configure fast PWM
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TCCR1B |= 0b00011001; // set and configure fast PWM
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// --- --- rows
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// TODO: set to high output
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// --- --- columns
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// TODO: set to input with pullup enabled
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// --- --- I2C (TWI)
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// TODO: use twi library
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}
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// TODO
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void mcp23018_init() {
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}
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