keyboard/fc980c/fc980c.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 "fc980c.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     debug_enable = true;
  50     debug_matrix = true;
  51
  52     KEY_INIT();
  53
  54     // LEDs on NumLock, CapsLock and ScrollLock(PB4, PB5, PB6)
  55     DDRB  |= (1<<4) | (1<<5) | (1<<6);
  56     PORTB |= (1<<4) | (1<<5) | (1<<6);
  57
  58     // initialize matrix state: all keys off
  59     for (uint8_t i=0; i < MATRIX_ROWS; i++) _matrix0[i] = 0x00;
  60     for (uint8_t i=0; i < MATRIX_ROWS; i++) _matrix1[i] = 0x00;
  61     matrix = _matrix0;
  62     matrix_prev = _matrix1;
  63 }
  64
  65 uint8_t matrix_scan(void)
  66 {
  67     matrix_row_t *tmp;
  68
  69     tmp = matrix_prev;
  70     matrix_prev = matrix;
  71     matrix = tmp;
  72
  73     uint8_t row, col;
  74     for (col = 0; col < MATRIX_COLS; col++) {
  75         SET_COL(col);
  76         for (row = 0; row < MATRIX_ROWS; row++) {
  77             //KEY_SELECT(row, col);
  78             SET_ROW(row);
  79             _delay_us(2);
  80
  81             // Not sure this is needed. This just emulates HHKB controller's behaviour.
  82             if (matrix_prev[row] & (1<<col)) {
  83                 KEY_HYS_ON();
  84             }
  85             _delay_us(10);
  86
  87             // NOTE: KEY_STATE is valid only in 20us after KEY_ENABLE.
  88             // If V-USB interrupts in this section we could lose 40us or so
  89             // and would read invalid value from KEY_STATE.
  90             uint8_t last = TIMER_RAW;
  91
  92             KEY_ENABLE();
  93
  94             // Wait for KEY_STATE outputs its value.
  95             _delay_us(2);
  96
  97             if (KEY_STATE()) {
  98                 matrix[row] &= ~(1<<col);
  99             } else {
 100                 matrix[row] |= (1<<col);
 101             }
 102
 103             // Ignore if this code region execution time elapses more than 20us.
 104             // MEMO: 20[us] * (TIMER_RAW_FREQ / 1000000)[count per us]
 105             // MEMO: then change above using this rule: a/(b/c) = a*1/(b/c) = a*(c/b)
 106             if (TIMER_DIFF_RAW(TIMER_RAW, last) > 20/(1000000/TIMER_RAW_FREQ)) {
 107                 matrix[row] = matrix_prev[row];
 108             }
 109
 110             _delay_us(5);
 111             KEY_HYS_OFF();
 112             KEY_UNABLE();
 113
 114             // NOTE: KEY_STATE keep its state in 20us after KEY_ENABLE.
 115             // This takes 25us or more to make sure KEY_STATE returns to idle state.
 116             _delay_us(75);
 117         }
 118         if (matrix[row] ^ matrix_prev[row]) {
 119             matrix_last_modified = timer_read32();
 120         }
 121     }
 122     return 1;
 123 }
 124
 125 inline
 126 matrix_row_t matrix_get_row(uint8_t row)
 127 {
 128     return matrix[row];
 129 }
 130
 131 void led_set(uint8_t usb_led)
 132 {
 133     if (usb_led & (1<<USB_LED_NUM_LOCK)) {
 134         PORTB |=  (1<<4);
 135     } else {
 136         PORTB &= ~(1<<4);
 137     }
 138     if (usb_led & (1<<USB_LED_CAPS_LOCK)) {
 139         PORTB |=  (1<<5);
 140     } else {
 141         PORTB &= ~(1<<5);
 142     }
 143     if (usb_led & (1<<USB_LED_SCROLL_LOCK)) {
 144         PORTB |=  (1<<6);
 145     } else {
 146         PORTB &= ~(1<<6);
 147     }
 148 }
 149
 150
 151 #ifdef UNIMAP_ENABLE
 152 #include <avr/pgmspace.h>
 153 #include "unimap.h"
 154
 155 const uint8_t PROGMEM unimap_trans[MATRIX_ROWS][MATRIX_COLS] = {
 156     { UNIMAP_LEFT, UNIMAP_RCTL, UNIMAP_RALT, UNIMAP_NO  , UNIMAP_DOWN, UNIMAP_PDOT, UNIMAP_RGHT, UNIMAP_P0  ,
 157       UNIMAP_X   , UNIMAP_LGUI, UNIMAP_GRV , UNIMAP_V   , UNIMAP_NO  , UNIMAP_ESC , UNIMAP_M   , UNIMAP_SPC   },
 158     { UNIMAP_RGUI, UNIMAP_DOT , UNIMAP_NO  , UNIMAP_NO  , UNIMAP_P1  , UNIMAP_PENT, UNIMAP_P2  , UNIMAP_P3  ,
 159       UNIMAP_Z   , UNIMAP_LALT, UNIMAP_RCTL, UNIMAP_C   , UNIMAP_K   , UNIMAP_NO  , UNIMAP_N   , UNIMAP_B     },
 160     { UNIMAP_QUOT, UNIMAP_SLSH, UNIMAP_COMM, UNIMAP_NO  , UNIMAP_P4  , UNIMAP_PPLS, UNIMAP_P5  , UNIMAP_P6  ,
 161       UNIMAP_D   , UNIMAP_A   , UNIMAP_LSFT, UNIMAP_F   , UNIMAP_J   , UNIMAP_F1  , UNIMAP_H   , UNIMAP_G     },
 162     { UNIMAP_RSFT, UNIMAP_SCLN, UNIMAP_L   , UNIMAP_RBRC, UNIMAP_UP  , UNIMAP_NO  , UNIMAP_NO  , UNIMAP_NO  ,
 163       UNIMAP_S   , UNIMAP_Q   , UNIMAP_CAPS, UNIMAP_R   , UNIMAP_I   , UNIMAP_F3  , UNIMAP_U   , UNIMAP_T     },
 164     { UNIMAP_NO  , UNIMAP_NO  , UNIMAP_NO  , UNIMAP_NO  , UNIMAP_NO  , UNIMAP_NO  , UNIMAP_NO  , UNIMAP_NO  ,
 165       UNIMAP_NO  , UNIMAP_NO  , UNIMAP_NO  , UNIMAP_NO  , UNIMAP_NO  , UNIMAP_NO  , UNIMAP_NO  , UNIMAP_NO    },
 166     { UNIMAP_EQL , UNIMAP_MINS, UNIMAP_0   , UNIMAP_BSLS, UNIMAP_NLCK, UNIMAP_BSPC, UNIMAP_PSLS, UNIMAP_PAST,
 167       UNIMAP_3   , UNIMAP_2   , UNIMAP_NO  , UNIMAP_4   , UNIMAP_9   , UNIMAP_F2  , UNIMAP_7   , UNIMAP_6     },
 168     { UNIMAP_LBRC, UNIMAP_P   , UNIMAP_O   , UNIMAP_ENT , UNIMAP_P7  , UNIMAP_PMNS, UNIMAP_P8  , UNIMAP_P9  ,
 169       UNIMAP_W   , UNIMAP_1   , UNIMAP_TAB , UNIMAP_E   , UNIMAP_8   , UNIMAP_F4  , UNIMAP_Y   , UNIMAP_5     },
 170     { UNIMAP_F11 , UNIMAP_F10 , UNIMAP_F9  , UNIMAP_F12 , UNIMAP_DEL , UNIMAP_PGDN, UNIMAP_INS , UNIMAP_PGUP,
 171       UNIMAP_NO  , UNIMAP_NO  , UNIMAP_NO  , UNIMAP_NO  , UNIMAP_F8  , UNIMAP_F5  , UNIMAP_F7  , UNIMAP_F6    }
 172
 173 };
 174 #endif