converter/m0110_usb/matrix.c

   1 /*
   2 Copyright 2011,2012 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 <avr/io.h>
  24 #include <util/delay.h>
  25 #include "print.h"
  26 #include "util.h"
  27 #include "debug.h"
  28 #include "host.h"
  29 #include "led.h"
  30 #include "m0110.h"
  31 #include "matrix.h"
  32
  33
  34 #define CAPS        0x39
  35 #define CAPS_BREAK  (CAPS | 0x80)
  36 #define ROW(key)    ((key)>>3&0x0F)
  37 #define COL(key)    ((key)&0x07)
  38
  39
  40 static bool is_modified = false;
  41
  42 // matrix state buffer(1:on, 0:off)
  43 static uint8_t *matrix;
  44 static uint8_t _matrix0[MATRIX_ROWS];
  45
  46 static void register_key(uint8_t key);
  47
  48
  49 inline
  50 uint8_t matrix_rows(void)
  51 {
  52     return MATRIX_ROWS;
  53 }
  54
  55 inline
  56 uint8_t matrix_cols(void)
  57 {
  58     return MATRIX_COLS;
  59 }
  60
  61 void matrix_init(void)
  62 {
  63     m0110_init();
  64     // initialize matrix state: all keys off
  65     for (uint8_t i=0; i < MATRIX_ROWS; i++) _matrix0[i] = 0x00;
  66     matrix = _matrix0;
  67     return;
  68 }
  69
  70 uint8_t matrix_scan(void)
  71 {
  72     uint8_t key;
  73
  74     is_modified = false;
  75     key = m0110_recv_key();
  76
  77 #ifdef MATRIX_HAS_LOCKING_CAPS
  78     // Send Caps key up event
  79     if (matrix_is_on(ROW(CAPS), COL(CAPS))) {
  80         is_modified = true;
  81         register_key(CAPS_BREAK);
  82     }
  83 #endif
  84     if (key == M0110_NULL) {
  85         return 0;
  86     } else if (key == M0110_ERROR) {
  87         return 0;
  88     } else {
  89 #ifdef MATRIX_HAS_LOCKING_CAPS
  90         if (host_keyboard_leds() & (1<<USB_LED_CAPS_LOCK)) {
  91             // CAPS LOCK on:
  92             // Ignore LockingCaps key down event
  93             if (key == CAPS) return 0;
  94             // Convert LockingCaps key up event into down event
  95             if (key == CAPS_BREAK) key = CAPS;
  96         } else {
  97             // CAPS LOCK off:
  98             // Ignore LockingCaps key up event
  99             if (key == CAPS_BREAK) return 0;
 100         }
 101 #endif
 102         is_modified = true;
 103         register_key(key);
 104     }
 105
 106     if (debug_enable) {
 107         print("["); phex(key); print("]\n");
 108     }
 109     return 1;
 110 }
 111
 112 bool matrix_is_modified(void)
 113 {
 114     return is_modified;
 115 }
 116
 117 inline
 118 bool matrix_has_ghost(void)
 119 {
 120     return false;
 121 }
 122
 123 inline
 124 bool matrix_is_on(uint8_t row, uint8_t col)
 125 {
 126     return (matrix[row] & (1<<col));
 127 }
 128
 129 inline
 130 uint8_t matrix_get_row(uint8_t row)
 131 {
 132     return matrix[row];
 133 }
 134
 135 void matrix_print(void)
 136 {
 137     print("\nr/c 01234567\n");
 138     for (uint8_t row = 0; row < matrix_rows(); row++) {
 139         phex(row); print(": ");
 140         pbin_reverse(matrix_get_row(row));
 141         print("\n");
 142     }
 143 }
 144
 145 uint8_t matrix_key_count(void)
 146 {
 147     uint8_t count = 0;
 148     for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
 149         count += bitpop(matrix[i]);
 150     }
 151     return count;
 152 }
 153
 154 inline
 155 static void register_key(uint8_t key)
 156 {
 157     if (key&0x80) {
 158         matrix[ROW(key)] &= ~(1<<COL(key));
 159     } else {
 160         matrix[ROW(key)] |=  (1<<COL(key));
 161     }
 162 }