converter/pc98_usb/matrix.c

   1 /*
   2 Copyright 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 #include <stdint.h>
  19 #include <stdbool.h>
  20 #include <avr/io.h>
  21 #include <util/delay.h>
  22 #include "print.h"
  23 #include "util.h"
  24 #include "matrix.h"
  25 #include "debug.h"
  26 #include "protocol/serial.h"
  27
  28
  29 /*
  30  * Matrix Array usage:
  31  *
  32  * ROW: 16(4bits)
  33  * COL:  8(3bits)
  34  *
  35  *    8bit wide
  36  *   +---------+
  37  *  0|00 ... 07|
  38  *  1|08 ... 0F|
  39  *  :|   ...   |
  40  *  :|   ...   |
  41  *  E|70 ... 77|
  42  *  F|78 ... 7F|
  43  *   +---------+
  44  */
  45 static uint8_t matrix[MATRIX_ROWS];
  46 #define ROW(code)      ((code>>3)&0xF)
  47 #define COL(code)      (code&0x07)
  48
  49 static bool is_modified = false;
  50
  51
  52 inline
  53 uint8_t matrix_rows(void)
  54 {
  55     return MATRIX_ROWS;
  56 }
  57
  58 inline
  59 uint8_t matrix_cols(void)
  60 {
  61     return MATRIX_COLS;
  62 }
  63
  64 static void pc98_inhibit_repeat(void)
  65 {
  66     uint8_t code;
  67
  68     while (serial_recv()) ;
  69 RETRY:
  70     PC98_RDY_PORT |= (1<<PC98_RDY_BIT);
  71     _delay_ms(500);
  72     serial_send(0x9C);
  73
  74     PC98_RDY_PORT &= ~(1<<PC98_RDY_BIT);
  75     _delay_ms(100);
  76     while (!(code = serial_recv())) ;
  77     print("PC98: send 9C: "); print_hex8(code); print("\n");
  78     if (code != 0xFA) goto RETRY;
  79
  80
  81
  82     PC98_RDY_PORT |= (1<<PC98_RDY_BIT);
  83     _delay_ms(100);
  84     serial_send(0x70);
  85
  86     PC98_RDY_PORT &= ~(1<<PC98_RDY_BIT);
  87     _delay_ms(100);
  88     //code = serial_recv();
  89     while (!(code = serial_recv())) ;
  90     print("PC98: send 70: "); print_hex8(code); print("\n");
  91     if (code != 0xFA) goto RETRY;
  92 }
  93
  94 void matrix_init(void)
  95 {
  96     print_enable = true;
  97 //    debug_enable = true;
  98 //    debug_matrix = true;
  99
 100     PC98_RST_DDR |= (1<<PC98_RST_BIT);
 101     PC98_RDY_DDR |= (1<<PC98_RDY_BIT);
 102     PC98_RTY_DDR |= (1<<PC98_RTY_BIT);
 103     PC98_RST_PORT |= (1<<PC98_RST_BIT);
 104     PC98_RDY_PORT |= (1<<PC98_RDY_BIT);
 105     PC98_RTY_PORT |= (1<<PC98_RTY_BIT);
 106
 107
 108     serial_init();
 109
 110     // PC98 reset
 111 /*
 112     PC98_RST_PORT &= ~(1<<PC98_RST_BIT);
 113     _delay_us(15);
 114     PC98_RST_PORT |= (1<<PC98_RST_BIT);
 115     _delay_us(13);
 116     PC98_RDY_PORT &= ~(1<<PC98_RDY_BIT);
 117 */
 118
 119     _delay_ms(500);
 120     pc98_inhibit_repeat();
 121
 122
 123     // PC98 ready
 124     PC98_RDY_PORT &= ~(1<<PC98_RDY_BIT);
 125
 126     // initialize matrix state: all keys off
 127     for (uint8_t i=0; i < MATRIX_ROWS; i++) matrix[i] = 0x00;
 128
 129     debug("init\n");
 130     return;
 131 }
 132
 133 uint8_t matrix_scan(void)
 134 {
 135     is_modified = false;
 136
 137     uint16_t code;
 138     PC98_RDY_PORT |= (1<<PC98_RDY_BIT);
 139     _delay_us(30);
 140     code = serial_recv2();
 141     PC98_RDY_PORT &= ~(1<<PC98_RDY_BIT);
 142     if (code == -1) return 0;
 143
 144 if (code == 0x60) {
 145     pc98_inhibit_repeat();
 146
 147 /*
 148     PC98_RDY_PORT |= (1<<PC98_RDY_BIT);
 149     _delay_ms(100);
 150     serial_send(0x96);
 151     PC98_RDY_PORT &= ~(1<<PC98_RDY_BIT);
 152 */
 153
 154     return 0;
 155 }
 156
 157     print_hex8(code); print(" ");
 158
 159     if (code&0x80) {
 160         // break code
 161         if (matrix_is_on(ROW(code), COL(code))) {
 162             matrix[ROW(code)] &= ~(1<<COL(code));
 163             is_modified = true;
 164         }
 165     } else {
 166         // make code
 167         if (!matrix_is_on(ROW(code), COL(code))) {
 168             matrix[ROW(code)] |=  (1<<COL(code));
 169             is_modified = true;
 170         }
 171     }
 172     return code;
 173 }
 174
 175 bool matrix_is_modified(void)
 176 {
 177     return is_modified;
 178 }
 179
 180 inline
 181 bool matrix_has_ghost(void)
 182 {
 183     return false;
 184 }
 185
 186 inline
 187 bool matrix_is_on(uint8_t row, uint8_t col)
 188 {
 189     return (matrix[row] & (1<<col));
 190 }
 191
 192 inline
 193 uint8_t matrix_get_row(uint8_t row)
 194 {
 195     return matrix[row];
 196 }
 197
 198 void matrix_print(void)
 199 {
 200     print("\nr/c 01234567\n");
 201     for (uint8_t row = 0; row < matrix_rows(); row++) {
 202         phex(row); print(": ");
 203         pbin_reverse(matrix_get_row(row));
 204         print("\n");
 205     }
 206 }
 207
 208 uint8_t matrix_key_count(void)
 209 {
 210     uint8_t count = 0;
 211     for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
 212         count += bitpop(matrix[i]);
 213     }
 214     return count;
 215 }