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     PC98_RST_DDR |= (1<<PC98_RST_BIT);
  97     PC98_RDY_DDR |= (1<<PC98_RDY_BIT);
  98     PC98_RTY_DDR |= (1<<PC98_RTY_BIT);
  99     PC98_RST_PORT |= (1<<PC98_RST_BIT);
 100     PC98_RDY_PORT |= (1<<PC98_RDY_BIT);
 101     PC98_RTY_PORT |= (1<<PC98_RTY_BIT);
 102
 103
 104     serial_init();
 105
 106     // PC98 reset
 107 /*
 108     PC98_RST_PORT &= ~(1<<PC98_RST_BIT);
 109     _delay_us(15);
 110     PC98_RST_PORT |= (1<<PC98_RST_BIT);
 111     _delay_us(13);
 112     PC98_RDY_PORT &= ~(1<<PC98_RDY_BIT);
 113 */
 114
 115     _delay_ms(500);
 116     pc98_inhibit_repeat();
 117
 118
 119     // PC98 ready
 120     PC98_RDY_PORT &= ~(1<<PC98_RDY_BIT);
 121
 122     // initialize matrix state: all keys off
 123     for (uint8_t i=0; i < MATRIX_ROWS; i++) matrix[i] = 0x00;
 124
 125     debug("init\n");
 126     return;
 127 }
 128
 129 uint8_t matrix_scan(void)
 130 {
 131     is_modified = false;
 132
 133     uint16_t code;
 134     PC98_RDY_PORT |= (1<<PC98_RDY_BIT);
 135     _delay_us(30);
 136     code = serial_recv2();
 137     PC98_RDY_PORT &= ~(1<<PC98_RDY_BIT);
 138     if (code == -1) return 0;
 139
 140 if (code == 0x60) {
 141     pc98_inhibit_repeat();
 142
 143 /*
 144     PC98_RDY_PORT |= (1<<PC98_RDY_BIT);
 145     _delay_ms(100);
 146     serial_send(0x96);
 147     PC98_RDY_PORT &= ~(1<<PC98_RDY_BIT);
 148 */
 149
 150     return 0;
 151 }
 152
 153     print_hex8(code); print(" ");
 154
 155     if (code&0x80) {
 156         // break code
 157         if (matrix_is_on(ROW(code), COL(code))) {
 158             matrix[ROW(code)] &= ~(1<<COL(code));
 159             is_modified = true;
 160         }
 161     } else {
 162         // make code
 163         if (!matrix_is_on(ROW(code), COL(code))) {
 164             matrix[ROW(code)] |=  (1<<COL(code));
 165             is_modified = true;
 166         }
 167     }
 168     return code;
 169 }
 170
 171 bool matrix_is_modified(void)
 172 {
 173     return is_modified;
 174 }
 175
 176 inline
 177 bool matrix_has_ghost(void)
 178 {
 179     return false;
 180 }
 181
 182 inline
 183 bool matrix_is_on(uint8_t row, uint8_t col)
 184 {
 185     return (matrix[row] & (1<<col));
 186 }
 187
 188 inline
 189 uint8_t matrix_get_row(uint8_t row)
 190 {
 191     return matrix[row];
 192 }
 193
 194 void matrix_print(void)
 195 {
 196     print("\nr/c 01234567\n");
 197     for (uint8_t row = 0; row < matrix_rows(); row++) {
 198         phex(row); print(": ");
 199         pbin_reverse(matrix_get_row(row));
 200         print("\n");
 201     }
 202 }
 203
 204 uint8_t matrix_key_count(void)
 205 {
 206     uint8_t count = 0;
 207     for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
 208         count += bitpop(matrix[i]);
 209     }
 210     return count;
 211 }