197 lines
7.3 KiB
C
197 lines
7.3 KiB
C
/* ----------------------------------------------------------------------------
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* ergodox controller (Teensy 2.0 and MCP23018) specific stuff
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* - public things are prefixed by `controller_` or `CONTROLLER_`
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* ----------------------------------------------------------------------------
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* Copyright (c) 2012 Ben Blazak
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* Released under The MIT License (MIT) (see "license.md") at
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* <https://github.com/benblazak/ergodox-firmware>
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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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* - '+' indicates pin
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* - 'o' indicates unused pin
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* - '-'s inserted between some of the pin names for readability
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* - 'OC**' pins enclosed in parenthesis had lines over them in the pinout
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* ----------------------------------------------------------------------------
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* ----------------------------------------------------------------------------
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* Teensy 2.0
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* ========== GND +---.....---+ VCC
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* SS PB0 + + PF0 ADC0
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* SCLK PB1 + + PF1 ADC1
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* MOSI PB2 + + PF4 ADC4
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* MISO PB3 + + + + PF5 ADC5
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* RTS OC1C OC0A --------- PB7 + PE6 AREF + PF6 ADC6
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* OC0B INT0 SCL PD0 + AIN0 + PF7 ADC7
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* INT1 SDA PD1 + INT6 + PB6 ADC13 OC1B OC4B
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* RXD1 ----------- INT2 --- PD2 + + PB5 ADC12 OC1A (OC4B)
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* TXD1 ----------- INT3 --- PD3 + + PB4 ADC11
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* OC3A (OC4A) -------- PC6 + + PD7 ADC10 T0 -- OC4D
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* ICP3 ----- OC4A --------- PC7 +-+-+-+-+-+-+ PD6 ADC9 T1 - (OC4D) onboardLED
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* CTS XCK1 PD5 --/ | | | \-- PD4 ADC8 ------------ ICP1
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* VCC ------------------/ | \-------------- RST
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* GND --------------------/
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* ----------------------------------------------------------------------------
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* MCP23018
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* ======== Vss(GND) +01---.---28+ NC
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* GPNC +02 27+ GPAC
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* GPB0 +03 26+ GPA6
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* GPB1 +04 25+ GPAC
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* GPB2 +05 24+ GPAC
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* GPB3 +06 23+ GPAC
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* GPB4 +07 22+ GPAC
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* GPB5 +08 21+ GPAC
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* GPB6 +09 20+ GPAC
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* GPB7 +10 19+ INTC
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* Vdd(Vcc) +11 18+ INTC
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* SCL +12 17+ NC
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* SDA +13 16+ RESET
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* NC +14-------15+ ADDR
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* ----------------------------------------------------------------------------
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* ----------------------------------------------------------------------------
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* Teensy 2.0 Pin Assignments
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* ==========================
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* power_negative GND +---.....---+ Vcc power_positive
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* column6 PB0 + + PF0 row6
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* o + PF1 row7
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* o + PF4 row8
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* o o o + PF5 row9
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* LED3 OC1C + + PF6 rowA
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* I2C SCL + + PF7 rowB
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* I2C SDA + + OC1B LED2
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* column3 PD2 + + OC1A LED1
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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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* MCP32018 Pin Assignments
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* ========================
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* power_negative Vss(GND) +01---.---28o
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* o02 27o
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* column0 GPB0 +03 26o
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* column1 GPB1 +04 25+ GPA5 rowB
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* column2 GPB2 +05 24+ GPA4 rowA
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* column3 GPB3 +06 23+ GPA3 row9
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* column4 GPB4 +07 22+ GPA2 row8
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* column5 GPB5 +08 21+ GPA1 row7
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* column6 GPB6 +09 20+ GPA0 row6
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* o10 19o
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* power_positive Vdd(Vcc) +11 18o
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* I2C SCL +12 17o
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* I2C SDA +13 16o
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* o14-------15+ ADDR (see note)
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*
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* notes:
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* - ADDR (pin15): Set slave address to 0b0100000 by connecting to Vss(GND)
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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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// 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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#define CPU_16MHz 0x00
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#define CPU_8MHz 0x01
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#define CPU_4MHz 0x02
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#define CPU_2MHz 0x03
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#define CPU_1MHz 0x04
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#define CPU_500kHz 0x05
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#define CPU_250kHz 0x06
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#define CPU_125kHz 0x07
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#define CPU_62kHz 0x08
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// teensy pins
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// TODO
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// I2C SCL PD0
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// I2C SDA PD1
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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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// COLUMN_0_RH PB4
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// COLUMN_1_RH PC6
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// COLUMN_2_RH PC7
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// COLUMN_3_RH PD2
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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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// COLUMN_0_LH GPB0
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// COLUMN_1_LH GPB1
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// COLUMN_2_LH GPB2
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// COLUMN_3_LH GPB3
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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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// 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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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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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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}
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