converter/ibm4704_usb/matrix.c

   1 /*
   2 Copyright 2014 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 "action.h"
  23 #include "print.h"
  24 #include "debug.h"
  25 #include "util.h"
  26 #include "ibm4704.h"
  27 #include "matrix.h"
  28
  29
  30 static void matrix_make(uint8_t code);
  31 static void matrix_break(uint8_t code);
  32 static void matrix_clear(void);
  33
  34
  35 /*
  36  * Matrix Array usage:
  37  * IBM 4704 scan codes are assigned into 128(16x8)-cell matrix.
  38  *
  39  *    8bit wide
  40  *   +---------+
  41  *  0|         |
  42  *  :|   XX    | 00-7F
  43  *  f|         |
  44  *   +---------+
  45  *
  46  * Exceptions:
  47  */
  48 static uint8_t matrix[MATRIX_ROWS];
  49
  50 // scan code bits  7654 3210
  51 // R:row/C:column  -RRR RCCC
  52 #define ROW(code)      ((code>>3)&0x0f)
  53 #define COL(code)      (code&0x07)
  54
  55
  56 inline
  57 uint8_t matrix_rows(void)
  58 {
  59     return MATRIX_ROWS;
  60 }
  61
  62 inline
  63 uint8_t matrix_cols(void)
  64 {
  65     return MATRIX_COLS;
  66 }
  67
  68 static void enable_break(void)
  69 {
  70     uint8_t ret;
  71     for (uint8_t code = 0; code < 0x80; code++) {
  72         while (ibm4704_send(0x80|code) != 0) {
  73             print("z");
  74         }
  75         _delay_ms(1);
  76         ret = ibm4704_recv();
  77         if (ret!=0xFF) {
  78             xprintf("%0X: %0X ", code, ret);
  79         }
  80     }
  81     _delay_us(100);
  82     print("End\n");
  83     while (ibm4704_send(0xFF) != 0) {
  84         print("Z");
  85     } // End
  86 }
  87
  88 void matrix_init(void)
  89 {
  90     debug_enable = true;
  91
  92     ibm4704_init();
  93     matrix_clear();
  94
  95     xprintf("------\n");
  96     enable_break();
  97     //while (ibm4704_send(0x8C) != 0) ;
  98     //while (ibm4704_send(0xFF) != 0) ;
  99 }
 100
 101 /*
 102  * IBM 4704 Scan Code
 103  */
 104 uint8_t matrix_scan(void)
 105 {
 106     uint8_t code = ibm4704_recv();
 107     if (code==0xFF) {
 108         // Not receivd
 109         return 0;
 110     } else if ((code&0x78)==0x78) {
 111         // 0xFF-F8 and 0x7F-78 is not scan code
 112         dprintf("Error: %0X\n", code);
 113         matrix_clear();
 114         return 0;
 115     } else if (code&0x80) {
 116         matrix_make(code);
 117     } else {
 118         matrix_break(code);
 119     }
 120     return 1;
 121 }
 122
 123 inline
 124 bool matrix_has_ghost(void)
 125 {
 126     return false;
 127 }
 128
 129 inline
 130 bool matrix_is_on(uint8_t row, uint8_t col)
 131 {
 132     return (matrix[row] & (1<<col));
 133 }
 134
 135 inline
 136 uint8_t matrix_get_row(uint8_t row)
 137 {
 138     return matrix[row];
 139 }
 140
 141 void matrix_print(void)
 142 {
 143     print("\nr/c 01234567\n");
 144     for (uint8_t row = 0; row < matrix_rows(); row++) {
 145         // TODO: use new function
 146         phex(row); print(": ");
 147         pbin_reverse(matrix_get_row(row));
 148         print("\n");
 149     }
 150 }
 151
 152 uint8_t matrix_key_count(void)
 153 {
 154     uint8_t count = 0;
 155     for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
 156         count += bitpop(matrix[i]);
 157     }
 158     return count;
 159 }
 160
 161
 162
 163 inline
 164 static void matrix_make(uint8_t code)
 165 {
 166     matrix[ROW(code)] |= 1<<COL(code);
 167 }
 168
 169 inline
 170 static void matrix_break(uint8_t code)
 171 {
 172     matrix[ROW(code)] &= ~(1<<COL(code));
 173 }
 174
 175 inline
 176 static void matrix_clear(void)
 177 {
 178     for (uint8_t i=0; i < MATRIX_ROWS; i++) matrix[i] = 0x00;
 179 }