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 void matrix_init(void)
  65 {
  66     print_enable = true;
  67     debug_enable = true;
  68
  69     PC98_RST_DDR |= (1<<PC98_RST_BIT);
  70     PC98_RDY_DDR |= (1<<PC98_RDY_BIT);
  71     PC98_RTY_DDR |= (1<<PC98_RTY_BIT);
  72     PC98_RST_PORT |= (1<<PC98_RST_BIT);
  73     PC98_RDY_PORT |= (1<<PC98_RDY_BIT);
  74     PC98_RTY_PORT |= (1<<PC98_RTY_BIT);
  75
  76
  77     serial_init();
  78
  79     // PC98 reset
  80     PC98_RST_PORT &= ~(1<<PC98_RST_BIT);
  81     _delay_us(15);
  82     PC98_RST_PORT |= (1<<PC98_RST_BIT);
  83     _delay_us(13);
  84     PC98_RDY_PORT |= (1<<PC98_RDY_BIT);
  85
  86     // initialize matrix state: all keys off
  87     for (uint8_t i=0; i < MATRIX_ROWS; i++) matrix[i] = 0x00;
  88
  89     debug("init\n");
  90     return;
  91 }
  92
  93 uint8_t matrix_scan(void)
  94 {
  95     is_modified = false;
  96
  97     uint8_t code;
  98     PC98_RDY_PORT |= (1<<PC98_RDY_BIT);
  99     code = serial_recv();
 100     PC98_RDY_PORT &= ~(1<<PC98_RDY_BIT);
 101     if (!code) return 0;
 102
 103     debug_hex(code); debug(" ");
 104
 105 /*
 106     switch (code) {
 107         case 0x7E:  // reset fail
 108         case 0xFE:  // layout
 109         case 0xFF:  // reset success
 110             _delay_ms(500);
 111             // ignore response byte
 112             debug("(response ignored:");
 113             while ((code = serial_recv())) { debug(" "); debug_hex(code); }
 114             debug(") ");
 115             // FALL THROUGH
 116         case 0x7F:
 117             // all keys up
 118             for (uint8_t i=0; i < MATRIX_ROWS; i++) matrix[i] = 0x00;
 119             return 0;
 120     }
 121
 122     if (code&0x80) {
 123         // break code
 124         if (matrix_is_on(ROW(code), COL(code))) {
 125             matrix[ROW(code)] &= ~(1<<COL(code));
 126             is_modified = true;
 127         }
 128     } else {
 129         // make code
 130         if (!matrix_is_on(ROW(code), COL(code))) {
 131             matrix[ROW(code)] |=  (1<<COL(code));
 132             is_modified = true;
 133         }
 134     }
 135 */
 136     return code;
 137 }
 138
 139 bool matrix_is_modified(void)
 140 {
 141     return is_modified;
 142 }
 143
 144 inline
 145 bool matrix_has_ghost(void)
 146 {
 147     return false;
 148 }
 149
 150 inline
 151 bool matrix_is_on(uint8_t row, uint8_t col)
 152 {
 153     return (matrix[row] & (1<<col));
 154 }
 155
 156 inline
 157 uint8_t matrix_get_row(uint8_t row)
 158 {
 159     return matrix[row];
 160 }
 161
 162 void matrix_print(void)
 163 {
 164     print("\nr/c 01234567\n");
 165     for (uint8_t row = 0; row < matrix_rows(); row++) {
 166         phex(row); print(": ");
 167         pbin_reverse(matrix_get_row(row));
 168         print("\n");
 169     }
 170 }
 171
 172 uint8_t matrix_key_count(void)
 173 {
 174     uint8_t count = 0;
 175     for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
 176         count += bitpop(matrix[i]);
 177     }
 178     return count;
 179 }