converter/sun_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     DDRD |= (1<<6);
  67     PORTD |= (1<<6);
  68     //debug_enable = true;
  69
  70     serial_init();
  71
  72     // initialize matrix state: all keys off
  73     for (uint8_t i=0; i < MATRIX_ROWS; i++) matrix[i] = 0x00;
  74
  75     // wait for keyboard coming up
  76     // otherwise LED status update fails
  77     print("Reseting ");
  78     while (1) {
  79         print(".");
  80         while (serial_recv());
  81         serial_send(0x01);
  82         _delay_ms(500);
  83         if (serial_recv() == 0xFF) {
  84             _delay_ms(500);
  85             if (serial_recv() == 0x04)
  86                 break;
  87         }
  88     }
  89     print(" Done\n");
  90     return;
  91 }
  92
  93 uint8_t matrix_scan(void)
  94 {
  95     is_modified = false;
  96
  97     uint8_t code;
  98     code = serial_recv();
  99     if (!code) return 0;
 100
 101     debug_hex(code); debug(" ");
 102
 103     switch (code) {
 104         case 0xFF:  // reset success
 105         case 0xFE:  // layout
 106         case 0x7E:  // reset fail
 107             if (code == 0xFF) print("reset: 0xFF ");
 108             if (code == 0x7E) print("reset fail: 0x7E ");
 109             if (code == 0xFE) print("layout: 0xFE ");
 110             // response byte
 111             _delay_ms(500);
 112             if (code = serial_recv()) print_hex8(code);
 113             print("\n");
 114             // FALL THROUGH
 115         case 0x7F:
 116             // all keys up
 117             for (uint8_t i=0; i < MATRIX_ROWS; i++) matrix[i] = 0x00;
 118             return 0;
 119     }
 120
 121     if (code&0x80) {
 122         // break code
 123         if (matrix_is_on(ROW(code), COL(code))) {
 124             matrix[ROW(code)] &= ~(1<<COL(code));
 125             is_modified = true;
 126         }
 127     } else {
 128         // make code
 129         if (!matrix_is_on(ROW(code), COL(code))) {
 130             matrix[ROW(code)] |=  (1<<COL(code));
 131             is_modified = true;
 132         }
 133     }
 134     return code;
 135 }
 136
 137 bool matrix_is_modified(void)
 138 {
 139     return is_modified;
 140 }
 141
 142 inline
 143 bool matrix_has_ghost(void)
 144 {
 145     return false;
 146 }
 147
 148 inline
 149 bool matrix_is_on(uint8_t row, uint8_t col)
 150 {
 151     return (matrix[row] & (1<<col));
 152 }
 153
 154 inline
 155 uint8_t matrix_get_row(uint8_t row)
 156 {
 157     return matrix[row];
 158 }
 159
 160 void matrix_print(void)
 161 {
 162     print("\nr/c 01234567\n");
 163     for (uint8_t row = 0; row < matrix_rows(); row++) {
 164         phex(row); print(": ");
 165         pbin_reverse(matrix_get_row(row));
 166         print("\n");
 167     }
 168 }
 169
 170 uint8_t matrix_key_count(void)
 171 {
 172     uint8_t count = 0;
 173     for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
 174         count += bitpop(matrix[i]);
 175     }
 176     return count;
 177 }