converter/usb_usb/matrix.c

   1 /*
   2 Copyright 2011 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 "usb_hid.h"
  21 #include "keycode.h"
  22 #include "util.h"
  23 #include "print.h"
  24 #include "debug.h"
  25 #include "matrix.h"
  26
  27 /* KEY CODE to Matrix
  28  *
  29  * HID keycode(1 byte):
  30  * Higher 5 bits indicates ROW and lower 3 bits COL.
  31  *
  32  *  7 6 5 4 3 2 1 0
  33  * +---------------+
  34  * |  ROW  |  COL  |
  35  * +---------------+
  36  *
  37  * Matrix space(16 * 16):
  38  *   r\c0123456789ABCDEF
  39  *   0 +----------------+
  40  *   : |                |
  41  *   : |                |
  42  *  16 +----------------+
  43  */
  44 #define ROW_MASK 0xF0
  45 #define COL_MASK 0x0F
  46 #define CODE(row, col)  (((row) << 4) | (col))
  47 #define ROW(code)       (((code) & ROW_MASK) >> 4)
  48 #define COL(code)       ((code) & COL_MASK)
  49 #define ROW_BITS(code)  (1 << COL(code))
  50
  51
  52 uint8_t matrix_rows(void) { return MATRIX_ROWS; }
  53 uint8_t matrix_cols(void) { return MATRIX_COLS; }
  54 void matrix_init(void) {}
  55 bool matrix_has_ghost(void) { return false; }
  56
  57 static bool matrix_is_mod =false;
  58
  59 uint8_t matrix_scan(void) {
  60     static uint16_t last_time_stamp = 0;
  61
  62     if (last_time_stamp != usb_hid_time_stamp) {
  63         last_time_stamp = usb_hid_time_stamp;
  64         matrix_is_mod = true;
  65     } else {
  66         matrix_is_mod = false;
  67     }
  68     return 1;
  69 }
  70
  71 bool matrix_is_modified(void) {
  72
  73     return matrix_is_mod;
  74 }
  75
  76 bool matrix_is_on(uint8_t row, uint8_t col) {
  77     uint8_t code = CODE(row, col);
  78
  79     if (IS_MOD(code)) {
  80         if (usb_hid_keyboard_report.mods & ROW_BITS(code)) {
  81             return true;
  82         }
  83     }
  84     for (uint8_t i = 0; i < KEYBOARD_REPORT_KEYS; i++) {
  85         if (usb_hid_keyboard_report.keys[i] == code) {
  86             return true;
  87         }
  88     }
  89     return false;
  90 }
  91
  92 matrix_row_t matrix_get_row(uint8_t row) {
  93     uint16_t row_bits = 0;
  94
  95     if (IS_MOD(CODE(row, 0)) && usb_hid_keyboard_report.mods) {
  96         row_bits |= usb_hid_keyboard_report.mods;
  97     }
  98
  99     for (uint8_t i = 0; i < KEYBOARD_REPORT_KEYS; i++) {
 100         if (IS_ANY(usb_hid_keyboard_report.keys[i])) {
 101             if (row == ROW(usb_hid_keyboard_report.keys[i])) {
 102                 row_bits |= ROW_BITS(usb_hid_keyboard_report.keys[i]);
 103             }
 104         }
 105     }
 106     return row_bits;
 107 }
 108
 109 uint8_t matrix_key_count(void) {
 110     uint8_t count = 0;
 111
 112     count += bitpop(usb_hid_keyboard_report.mods);
 113     for (uint8_t i = 0; i < KEYBOARD_REPORT_KEYS; i++) {
 114         if (IS_ANY(usb_hid_keyboard_report.keys[i])) {
 115             count++;
 116         }
 117     }
 118     return count;
 119 }
 120
 121 void matrix_print(void) {
 122     print("\nr/c 01234567\n");
 123     for (uint8_t row = 0; row < matrix_rows(); row++) {
 124         phex(row); print(": ");
 125         pbin_reverse(matrix_get_row(row));
 126 #ifdef MATRIX_HAS_GHOST
 127         if (matrix_has_ghost_in_row(row)) {
 128             print(" <ghost");
 129         }
 130 #endif
 131         print("\n");
 132     }
 133 }