common/matrix.h

   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 #ifndef MATRIX_H
  19 #define MATRIX_H
  20
  21 #include <stdint.h>
  22 #include <stdbool.h>
  23
  24
  25 #if (MATRIX_COLS <= 8)
  26 typedef  uint8_t    matrix_row_t;
  27 #elif (MATRIX_COLS <= 16)
  28 typedef  uint16_t   matrix_row_t;
  29 #elif (MATRIX_COLS <= 32)
  30 typedef  uint32_t   matrix_row_t;
  31 #else
  32 #error "MATRIX_COLS: invalid value"
  33 #endif
  34
  35 #define MATRIX_IS_ON(row, col)  (matrix_get_row(row) && (1<<col))
  36
  37
  38 /* number of matrix rows */
  39 uint8_t matrix_rows(void);
  40 /* number of matrix columns */
  41 uint8_t matrix_cols(void);
  42 /* intialize matrix for scaning. should be called once. */
  43 void matrix_init(void);
  44 /* scan all key states on matrix */
  45 uint8_t matrix_scan(void);
  46 /* whether modified from previous scan. used after matrix_scan. */
  47 bool matrix_is_modified(void) __attribute__ ((deprecated));
  48 /* whether a swtich is on */
  49 bool matrix_is_on(uint8_t row, uint8_t col);
  50 /* matrix state on row */
  51 matrix_row_t  matrix_get_row(uint8_t row);
  52 /* print matrix for debug */
  53 void matrix_print(void);
  54
  55
  56 /* power control */
  57 void matrix_power_up(void);
  58 void matrix_power_down(void);
  59
  60
  61 #endif