keyboard/fc660c/fc660c.c

   1 /*
   2 Copyright 2017 Jun Wako <wakojun@gmail.com>
   3
   4 This program is free software: you can redistribute it and/or modify
   5 it under the terms of the GNU General Public License as published by
   6 the Free Software Foundation, either version 2 of the License, or
   7 (at your option) any later version.
   8
   9 This program is distributed in the hope that it will be useful,
  10 but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 GNU General Public License for more details.
  13
  14 You should have received a copy of the GNU General Public License
  15 along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16 */
  17
  18 /*
  19  * scan matrix
  20  */
  21 #include <stdint.h>
  22 #include <stdbool.h>
  23 #include <util/delay.h>
  24 #include "print.h"
  25 #include "debug.h"
  26 #include "util.h"
  27 #include "timer.h"
  28 #include "matrix.h"
  29 #include "led.h"
  30 #include "fc660c.h"
  31
  32
  33 static uint32_t matrix_last_modified = 0;
  34
  35 // matrix state buffer(1:on, 0:off)
  36 static matrix_row_t *matrix;
  37 static matrix_row_t *matrix_prev;
  38 static matrix_row_t _matrix0[MATRIX_ROWS];
  39 static matrix_row_t _matrix1[MATRIX_ROWS];
  40
  41
  42 void matrix_init(void)
  43 {
  44 #if 0
  45     debug_enable = true;
  46     debug_keyboard = true;
  47     debug_matrix = true;
  48 #endif
  49
  50     KEY_INIT();
  51
  52     // LEDs on CapsLock and Insert
  53     DDRB  |= (1<<5) | (1<<6);
  54     PORTB |= (1<<5) | (1<<6);
  55
  56     // initialize matrix state: all keys off
  57     for (uint8_t i=0; i < MATRIX_ROWS; i++) _matrix0[i] = 0x00;
  58     for (uint8_t i=0; i < MATRIX_ROWS; i++) _matrix1[i] = 0x00;
  59     matrix = _matrix0;
  60     matrix_prev = _matrix1;
  61 }
  62
  63 uint8_t matrix_scan(void)
  64 {
  65     matrix_row_t *tmp;
  66
  67     tmp = matrix_prev;
  68     matrix_prev = matrix;
  69     matrix = tmp;
  70
  71     uint8_t row, col;
  72     for (col = 0; col < MATRIX_COLS; col++) {
  73         SET_COL(col);
  74         for (row = 0; row < MATRIX_ROWS; row++) {
  75             //KEY_SELECT(row, col);
  76             SET_ROW(row);
  77             _delay_us(2);
  78
  79             // Not sure this is needed. This just emulates HHKB controller's behaviour.
  80             if (matrix_prev[row] & (1<<col)) {
  81                 KEY_HYS_ON();
  82             }
  83             _delay_us(10);
  84
  85             // NOTE: KEY_STATE is valid only in 20us after KEY_ENABLE.
  86             // If V-USB interrupts in this section we could lose 40us or so
  87             // and would read invalid value from KEY_STATE.
  88             uint8_t last = TIMER_RAW;
  89
  90             KEY_ENABLE();
  91
  92             // Wait for KEY_STATE outputs its value.
  93             _delay_us(2);
  94
  95             if (KEY_STATE()) {
  96                 matrix[row] &= ~(1<<col);
  97             } else {
  98                 matrix[row] |= (1<<col);
  99             }
 100
 101             // Ignore if this code region execution time elapses more than 20us.
 102             // MEMO: 20[us] * (TIMER_RAW_FREQ / 1000000)[count per us]
 103             // MEMO: then change above using this rule: a/(b/c) = a*1/(b/c) = a*(c/b)
 104             if (TIMER_DIFF_RAW(TIMER_RAW, last) > 20/(1000000/TIMER_RAW_FREQ)) {
 105                 matrix[row] = matrix_prev[row];
 106             }
 107
 108             _delay_us(5);
 109             KEY_HYS_OFF();
 110             KEY_UNABLE();
 111
 112             // NOTE: KEY_STATE keep its state in 20us after KEY_ENABLE.
 113             // This takes 25us or more to make sure KEY_STATE returns to idle state.
 114             _delay_us(75);
 115         }
 116         if (matrix[row] ^ matrix_prev[row]) {
 117             matrix_last_modified = timer_read32();
 118         }
 119     }
 120     return 1;
 121 }
 122
 123 inline
 124 matrix_row_t matrix_get_row(uint8_t row)
 125 {
 126     return matrix[row];
 127 }
 128
 129 void led_set(uint8_t usb_led)
 130 {
 131     if (usb_led & (1<<USB_LED_CAPS_LOCK)) {
 132         PORTB &= ~(1<<6);
 133     } else {
 134         PORTB |=  (1<<6);
 135     }
 136 }
 137
 138
 139 #ifdef UNIMAP_ENABLE
 140 #include <avr/pgmspace.h>
 141 #include "unimap.h"
 142
 143 const uint8_t PROGMEM unimap_trans[MATRIX_ROWS][MATRIX_COLS] = {
 144     { UNIMAP_Q,     UNIMAP_W,     UNIMAP_E,     UNIMAP_TAB,   UNIMAP_R,     UNIMAP_U,     UNIMAP_T,     UNIMAP_Y,
 145       UNIMAP_O,     UNIMAP_P,     UNIMAP_LBRC,  UNIMAP_I,     UNIMAP_RBRC,  UNIMAP_NO,    UNIMAP_BSLS,  UNIMAP_DEL   },
 146     { UNIMAP_1,     UNIMAP_2,     UNIMAP_3,     UNIMAP_GRV,   UNIMAP_4,     UNIMAP_7,     UNIMAP_5,     UNIMAP_6,
 147       UNIMAP_9,     UNIMAP_0,     UNIMAP_MINS,  UNIMAP_8,     UNIMAP_EQL,   UNIMAP_NO,    UNIMAP_BSPC,  UNIMAP_INS   },
 148     { UNIMAP_NO,    UNIMAP_LGUI,  UNIMAP_LALT,  UNIMAP_LCTL,  UNIMAP_NO,    UNIMAP_NO,    UNIMAP_NO,    UNIMAP_SPC,
 149       UNIMAP_RALT,  UNIMAP_NO,    UNIMAP_RCTL,  UNIMAP_NO,    UNIMAP_RGUI,  UNIMAP_DOWN,  UNIMAP_LEFT,  UNIMAP_RGHT  },
 150     { UNIMAP_NO,    UNIMAP_Z,     UNIMAP_X,     UNIMAP_LSFT,  UNIMAP_C,     UNIMAP_N,     UNIMAP_V,     UNIMAP_B,
 151       UNIMAP_COMM,  UNIMAP_DOT,   UNIMAP_SLSH,  UNIMAP_M,     UNIMAP_RSFT,  UNIMAP_UP,    UNIMAP_NO,    UNIMAP_NO    },
 152     { UNIMAP_A,     UNIMAP_S,     UNIMAP_D,     UNIMAP_CAPS,  UNIMAP_F,     UNIMAP_J,     UNIMAP_G,     UNIMAP_H,
 153       UNIMAP_L,     UNIMAP_SCLN,  UNIMAP_QUOT,  UNIMAP_K,     UNIMAP_NO,    UNIMAP_NO,    UNIMAP_ENT,   UNIMAP_NO    },
 154     { UNIMAP_NO,    UNIMAP_NO,    UNIMAP_NO,    UNIMAP_NO,    UNIMAP_NO,    UNIMAP_NO,    UNIMAP_NO,    UNIMAP_NO,
 155       UNIMAP_NO,    UNIMAP_NO,    UNIMAP_NO,    UNIMAP_NO,    UNIMAP_NO,    UNIMAP_NO,    UNIMAP_NO,    UNIMAP_NO    },
 156     { UNIMAP_NO,    UNIMAP_NO,    UNIMAP_NO,    UNIMAP_NO,    UNIMAP_NO,    UNIMAP_NO,    UNIMAP_NO,    UNIMAP_NO,
 157       UNIMAP_NO,    UNIMAP_NO,    UNIMAP_NO,    UNIMAP_NO,    UNIMAP_NO,    UNIMAP_NO,    UNIMAP_NO,    UNIMAP_NO    },
 158     { UNIMAP_NO,    UNIMAP_NO,    UNIMAP_NO,    UNIMAP_NO,    UNIMAP_NO,    UNIMAP_NO,    UNIMAP_NO,    UNIMAP_NO,
 159       UNIMAP_NO,    UNIMAP_NO,    UNIMAP_NO,    UNIMAP_NO,    UNIMAP_NO,    UNIMAP_NO,    UNIMAP_NO,    UNIMAP_NO    }
 160 };
 161 #endif