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
  68     // LED flash
  69     DDRD |= (1<<6); PORTD |= (1<<6);
  70     _delay_ms(500);
  71     DDRD |= (1<<6); PORTD &= ~(1<<6);
  72
  73     return;
  74 }
  75
  76 uint8_t matrix_scan(void)
  77 {
  78     uint8_t key;
  79
  80     is_modified = false;
  81     key = m0110_recv_key();
  82
  83     if (key == M0110_NULL) {
  84         return 0;
  85     } else if (key == M0110_ERROR) {
  86         return 0;
  87     } else {
  88         is_modified = true;
  89         register_key(key);
  90     }
  91
  92     if (debug_enable) {
  93         print("["); phex(key); print("]\n");
  94     }
  95     return 1;
  96 }
  97
  98 bool matrix_is_modified(void)
  99 {
 100     return is_modified;
 101 }
 102
 103 inline
 104 bool matrix_has_ghost(void)
 105 {
 106     return false;
 107 }
 108
 109 inline
 110 bool matrix_is_on(uint8_t row, uint8_t col)
 111 {
 112     return (matrix[row] & (1<<col));
 113 }
 114
 115 inline
 116 uint8_t matrix_get_row(uint8_t row)
 117 {
 118     return matrix[row];
 119 }
 120
 121 void matrix_print(void)
 122 {
 123     print("\nr/c 01234567\n");
 124     for (uint8_t row = 0; row < matrix_rows(); row++) {
 125         phex(row); print(": ");
 126         pbin_reverse(matrix_get_row(row));
 127         print("\n");
 128     }
 129 }
 130
 131 uint8_t matrix_key_count(void)
 132 {
 133     uint8_t count = 0;
 134     for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
 135         count += bitpop(matrix[i]);
 136     }
 137     return count;
 138 }
 139
 140 inline
 141 static void register_key(uint8_t key)
 142 {
 143     if (key&0x80) {
 144         matrix[ROW(key)] &= ~(1<<COL(key));
 145     } else {
 146         matrix[ROW(key)] |=  (1<<COL(key));
 147     }
 148 }