keyboard/hhkb/hhkb_avr.h

   1 #ifndef HHKB_AVR_H
   2 #define HHKB_AVR_H
   3
   4 #include <stdint.h>
   5 #include <stdbool.h>
   6 #include <avr/io.h>
   7 #include <avr/interrupt.h>
   8 #include <util/delay.h>
   9
  10
  11 // Timer resolution check
  12 #if (1000000/TIMER_RAW_FREQ > 20)
  13 #   error "Timer resolution(>20us) is not enough for HHKB matrix scan tweak on V-USB."
  14 #endif
  15
  16
  17 /*
  18  * HHKB Matrix I/O
  19  *
  20  * row:     HC4051[A,B,C]  selects scan row0-7
  21  * row-ext: [En0,En1] row extention for JP
  22  * col:     LS145[A,B,C,D] selects scan col0-7 and enable(D)
  23  * key:     on: 0/off: 1
  24  * prev:    hysteresis control: assert(1) when previous key state is on
  25  */
  26
  27
  28 #if defined(__AVR_ATmega32U4__)
  29 /*
  30  * For TMK HHKB alt controller(ATMega32U4)
  31  *
  32  * row:     PB0-2
  33  * col:     PB3-5,6
  34  * key:     PD7(pull-uped)
  35  * prev:    PB7
  36  * power:   PD4(L:off/H:on)
  37  * row-ext: PC6,7 for HHKB JP(active low)
  38  */
  39 static inline void KEY_ENABLE(void) { (PORTB &= ~(1<<6)); }
  40 static inline void KEY_UNABLE(void) { (PORTB |=  (1<<6)); }
  41 static inline bool KEY_STATE(void) { return (PIND & (1<<7)); }
  42 static inline void KEY_PREV_ON(void) { (PORTB |=  (1<<7)); }
  43 static inline void KEY_PREV_OFF(void) { (PORTB &= ~(1<<7)); }
  44 static inline void KEY_POWER_ON(void) {}
  45 static inline void KEY_POWER_OFF(void) {}
  46 static inline void KEY_INIT(void)
  47 {
  48     DDRB  = 0xFF;
  49     PORTB = 0x00;
  50     DDRD  &= ~0x80;
  51     PORTD |= 0x80;
  52     /* keyswitch board power on */
  53     DDRD  |=  (1<<4);
  54     PORTD |=  (1<<4);
  55 #ifdef HHKB_JP
  56     /* row extention for HHKB JP */
  57     DDRC  |= (1<<6|1<<7);
  58     PORTC |= (1<<6|1<<7);
  59 #endif
  60     KEY_UNABLE();
  61     KEY_PREV_OFF();
  62 }
  63 static inline void KEY_SELECT(uint8_t ROW, uint8_t COL)
  64 {
  65     PORTB = (PORTB & 0xC0) | (((COL) & 0x07)<<3) | ((ROW) & 0x07);
  66 #ifdef HHKB_JP
  67     if ((ROW) & 0x08) PORTC = (PORTC & ~(1<<6|1<<7)) | (1<<6);
  68     else              PORTC = (PORTC & ~(1<<6|1<<7)) | (1<<7);
  69 #endif
  70 }
  71
  72
  73 #elif defined(__AVR_AT90USB1286__)
  74 /*
  75  * For Teensy++(AT90USB1286)
  76  *
  77  * row:     PB0-2
  78  * col:     PB3-5,6
  79  * key:     PE6(pull-uped)
  80  * prev:    PE7
  81  *
  82  * TODO: convert into 'staitc inline' function
  83  */
  84 #define KEY_INIT()              do {    \
  85     DDRB |= 0x7F;                       \
  86     DDRE |=  (1<<7);                    \
  87     DDRE &= ~(1<<6);                    \
  88     PORTE |= (1<<6);                    \
  89 } while (0)
  90 #define KEY_SELECT(ROW, COL)    (PORTB = (PORTB & 0xC0) |       \
  91                                          (((COL) & 0x07)<<3) |  \
  92                                          ((ROW) & 0x07))
  93 #define KEY_ENABLE()            (PORTB &= ~(1<<6))
  94 #define KEY_UNABLE()            (PORTB |=  (1<<6))
  95 #define KEY_STATE()             (PINE & (1<<6))
  96 #define KEY_PREV_ON()           (PORTE |=  (1<<7))
  97 #define KEY_PREV_OFF()          (PORTE &= ~(1<<7))
  98 #define KEY_POWER_ON()
  99 #define KEY_POWER_OFF()
 100
 101
 102 #else
 103 #   error "define code for matrix scan"
 104 #endif
 105
 106
 107 #if 0
 108 // For ATMega328P with V-USB
 109 //
 110 // #elif defined(__AVR_ATmega328P__)
 111 // Ports for V-USB
 112 // key:     PB0(pull-uped)
 113 // prev:    PB1
 114 // row:     PB2-4
 115 // col:     PC0-2,3
 116 // power:   PB5(Low:on/Hi-z:off)
 117 #define KEY_INIT()              do {    \
 118     DDRB  |= 0x3E;                      \
 119     DDRB  &= ~(1<<0);                   \
 120     PORTB |= 1<<0;                      \
 121     DDRC  |= 0x0F;                      \
 122     KEY_UNABLE();                       \
 123     KEY_PREV_OFF();                     \
 124 } while (0)
 125 #define KEY_SELECT(ROW, COL)    do {    \
 126     PORTB = (PORTB & 0xE3) | ((ROW) & 0x07)<<2; \
 127     PORTC = (PORTC & 0xF8) | ((COL) & 0x07);    \
 128 } while (0)
 129 #define KEY_ENABLE()            (PORTC &= ~(1<<3))
 130 #define KEY_UNABLE()            (PORTC |=  (1<<3))
 131 #define KEY_STATE()             (PINB & (1<<0))
 132 #define KEY_PREV_ON()           (PORTB |=  (1<<1))
 133 #define KEY_PREV_OFF()          (PORTB &= ~(1<<1))
 134 // Power supply switching
 135 #define KEY_POWER_ON()          do {    \
 136     KEY_INIT();                         \
 137     PORTB &= ~(1<<5);                   \
 138     _delay_ms(1);                       \
 139 } while (0)
 140 #define KEY_POWER_OFF()         do {    \
 141     DDRB  &= ~0x3F;                     \
 142     PORTB &= ~0x3F;                     \
 143     DDRC  &= ~0x0F;                     \
 144     PORTC &= ~0x0F;                     \
 145 } while (0)
 146 #endif
 147
 148 #endif