168 lines
5.0 KiB
C
168 lines
5.0 KiB
C
#ifndef HHKB_AVR_H
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#define HHKB_AVR_H
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#include <stdint.h>
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#include <stdbool.h>
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#include <avr/io.h>
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#include <avr/interrupt.h>
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#include <util/delay.h>
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// Timer resolution check
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#if (1000000/TIMER_RAW_FREQ > 20)
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# error "Timer resolution(>20us) is not enough for HHKB matrix scan tweak on V-USB."
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#endif
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/*
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* HHKB Matrix I/O
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*
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* row: HC4051[A,B,C] selects scan row0-7
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* row-ext: [En0,En1] row extention for JP
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* col: LS145[A,B,C,D] selects scan col0-7 and enable(D)
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* key: on: 0/off: 1
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* prev: hysteresis control: assert(1) when previous key state is on
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*/
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#if defined(__AVR_ATmega32U4__)
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/*
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* For TMK HHKB alt controller(ATMega32U4)
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*
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* row: PB0-2
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* col: PB3-5,6
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* key: PD7(pull-uped)
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* prev: PB7
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* power: PD4(L:off/H:on)
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* row-ext: PC6,7 for HHKB JP(active low)
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*/
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static inline void KEY_ENABLE(void) { (PORTB &= ~(1<<6)); }
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static inline void KEY_UNABLE(void) { (PORTB |= (1<<6)); }
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static inline bool KEY_STATE(void) { return (PIND & (1<<7)); }
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static inline void KEY_PREV_ON(void) { (PORTB |= (1<<7)); }
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static inline void KEY_PREV_OFF(void) { (PORTB &= ~(1<<7)); }
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#ifdef HHKB_POWER_SAVING
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static inline void KEY_POWER_ON(void) {
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DDRB = 0xFF; PORTB = 0x40; // change pins output
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DDRD |= (1<<4); PORTD |= (1<<4); // MOS FET switch on
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/* Without this wait you will miss or get false key events. */
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_delay_ms(5); // wait for powering up
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}
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static inline void KEY_POWER_OFF(void) {
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/* input with pull-up consumes less than without it when pin is open. */
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DDRB = 0x00; PORTB = 0xFF; // change pins input with pull-up
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DDRD |= (1<<4); PORTD &= ~(1<<4); // MOS FET switch off
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}
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static inline bool KEY_POWER_STATE(void) { return PORTD & (1<<4); }
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#else
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static inline void KEY_POWER_ON(void) {}
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static inline void KEY_POWER_OFF(void) {}
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static inline bool KEY_POWER_STATE(void) { return true; }
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#endif
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static inline void KEY_INIT(void)
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{
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/* row,col,prev: output */
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DDRB = 0xFF;
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PORTB = 0x40; // unable
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/* key: input with pull-up */
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DDRD &= ~0x80;
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PORTD |= 0x80;
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#ifdef HHKB_JP
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/* row extention for HHKB JP */
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DDRC |= (1<<6|1<<7);
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PORTC |= (1<<6|1<<7);
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#endif
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KEY_UNABLE();
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KEY_PREV_OFF();
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KEY_POWER_OFF();
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}
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static inline void KEY_SELECT(uint8_t ROW, uint8_t COL)
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{
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PORTB = (PORTB & 0xC0) | (((COL) & 0x07)<<3) | ((ROW) & 0x07);
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#ifdef HHKB_JP
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if ((ROW) & 0x08) PORTC = (PORTC & ~(1<<6|1<<7)) | (1<<6);
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else PORTC = (PORTC & ~(1<<6|1<<7)) | (1<<7);
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#endif
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}
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#elif defined(__AVR_AT90USB1286__)
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/*
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* For Teensy++(AT90USB1286)
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*
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* HHKB pro HHKB pro2
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* row: PB0-2 (6-8) (5-7)
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* col: PB3-5,6 (9-12) (8-11)
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* key: PE6(pull-uped) (4) (3)
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* prev: PE7 (5) (4)
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*
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* TODO: convert into 'staitc inline' function
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*/
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#define KEY_INIT() do { \
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DDRB |= 0x7F; \
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DDRE |= (1<<7); \
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DDRE &= ~(1<<6); \
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PORTE |= (1<<6); \
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} while (0)
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#define KEY_SELECT(ROW, COL) (PORTB = (PORTB & 0xC0) | \
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(((COL) & 0x07)<<3) | \
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((ROW) & 0x07))
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#define KEY_ENABLE() (PORTB &= ~(1<<6))
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#define KEY_UNABLE() (PORTB |= (1<<6))
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#define KEY_STATE() (PINE & (1<<6))
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#define KEY_PREV_ON() (PORTE |= (1<<7))
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#define KEY_PREV_OFF() (PORTE &= ~(1<<7))
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#define KEY_POWER_ON()
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#define KEY_POWER_OFF()
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#define KEY_POWER_STATE() true
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#else
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# error "define code for matrix scan"
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#endif
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#if 0
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// For ATMega328P with V-USB
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//
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// #elif defined(__AVR_ATmega328P__)
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// Ports for V-USB
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// key: PB0(pull-uped)
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// prev: PB1
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// row: PB2-4
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// col: PC0-2,3
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// power: PB5(Low:on/Hi-z:off)
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#define KEY_INIT() do { \
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DDRB |= 0x3E; \
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DDRB &= ~(1<<0); \
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PORTB |= 1<<0; \
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DDRC |= 0x0F; \
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KEY_UNABLE(); \
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KEY_PREV_OFF(); \
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} while (0)
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#define KEY_SELECT(ROW, COL) do { \
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PORTB = (PORTB & 0xE3) | ((ROW) & 0x07)<<2; \
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PORTC = (PORTC & 0xF8) | ((COL) & 0x07); \
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} while (0)
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#define KEY_ENABLE() (PORTC &= ~(1<<3))
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#define KEY_UNABLE() (PORTC |= (1<<3))
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#define KEY_STATE() (PINB & (1<<0))
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#define KEY_PREV_ON() (PORTB |= (1<<1))
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#define KEY_PREV_OFF() (PORTB &= ~(1<<1))
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// Power supply switching
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#define KEY_POWER_ON() do { \
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KEY_INIT(); \
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PORTB &= ~(1<<5); \
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_delay_ms(1); \
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} while (0)
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#define KEY_POWER_OFF() do { \
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DDRB &= ~0x3F; \
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PORTB &= ~0x3F; \
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DDRC &= ~0x0F; \
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PORTC &= ~0x0F; \
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} while (0)
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#endif
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#endif
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