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 #include "led.h"
  28 #include "host.h"
  29
  30
  31 /*
  32  * Matrix Array usage:
  33  *
  34  * ROW: 16(4bits)
  35  * COL:  8(3bits)
  36  *
  37  *    8bit wide
  38  *   +---------+
  39  *  0|00 ... 07|
  40  *  1|08 ... 0F|
  41  *  :|   ...   |
  42  *  :|   ...   |
  43  *  E|70 ... 77|
  44  *  F|78 ... 7F|
  45  *   +---------+
  46  */
  47 static uint8_t matrix[MATRIX_ROWS];
  48 #define ROW(code)      ((code>>3)&0xF)
  49 #define COL(code)      (code&0x07)
  50
  51
  52 void matrix_init(void)
  53 {
  54     DDRD |= (1<<6);
  55     PORTD |= (1<<6);
  56     //debug_enable = true;
  57
  58     serial_init();
  59
  60     // initialize matrix state: all keys off
  61     for (uint8_t i=0; i < MATRIX_ROWS; i++) matrix[i] = 0x00;
  62
  63     // wait for keyboard coming up
  64     // otherwise LED status update fails
  65     print("Reseting ");
  66     while (1) {
  67         print(".");
  68         while (serial_recv());
  69         serial_send(0x01);
  70         _delay_ms(500);
  71         if (serial_recv() == 0xFF) {
  72             _delay_ms(500);
  73             if (serial_recv() == 0x04)
  74                 break;
  75         }
  76     }
  77     print(" Done\n");
  78
  79     PORTD &= ~(1<<6);
  80     return;
  81 }
  82
  83 uint8_t matrix_scan(void)
  84 {
  85     uint8_t code;
  86     code = serial_recv();
  87     if (!code) return 0;
  88
  89     debug_hex(code); debug(" ");
  90
  91     switch (code) {
  92         case 0xFF:  // reset success: FF 04
  93             print("reset: ");
  94             _delay_ms(500);
  95             code = serial_recv();
  96             xprintf("%02X\n", code);
  97             if (code == 0x04) {
  98                 // LED status
  99                 led_set(host_keyboard_leds());
 100             }
 101             return 0;
 102         case 0xFE:  // layout: FE <layout>
 103             print("layout: ");
 104             _delay_ms(500);
 105             xprintf("%02X\n", serial_recv());
 106             return 0;
 107         case 0x7E:  // reset fail: 7E 01
 108             print("reset fail: ");
 109             _delay_ms(500);
 110             xprintf("%02X\n", serial_recv());
 111             return 0;
 112         case 0x7F:
 113             // all keys up
 114             for (uint8_t i=0; i < MATRIX_ROWS; i++) matrix[i] = 0x00;
 115             return 0;
 116     }
 117
 118     if (code&0x80) {
 119         // break code
 120         if (matrix_is_on(ROW(code), COL(code))) {
 121             matrix[ROW(code)] &= ~(1<<COL(code));
 122         }
 123     } else {
 124         // make code
 125         if (!matrix_is_on(ROW(code), COL(code))) {
 126             matrix[ROW(code)] |=  (1<<COL(code));
 127         }
 128     }
 129     return code;
 130 }
 131
 132 inline
 133 uint8_t matrix_get_row(uint8_t row)
 134 {
 135     return matrix[row];
 136 }