Keyboard firmwares for Atmel AVR and Cortex-M
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matrix.c 7.9KB

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  1. /*
  2. Copyright 2012 Jun Wako <[email protected]>
  3. This program is free software: you can redistribute it and/or modify
  4. it under the terms of the GNU General Public License as published by
  5. the Free Software Foundation, either version 2 of the License, or
  6. (at your option) any later version.
  7. This program is distributed in the hope that it will be useful,
  8. but WITHOUT ANY WARRANTY; without even the implied warranty of
  9. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  10. GNU General Public License for more details.
  11. You should have received a copy of the GNU General Public License
  12. along with this program. If not, see <http://www.gnu.org/licenses/>.
  13. */
  14. #include "ch.h"
  15. #include "hal.h"
  16. /*
  17. * scan matrix
  18. */
  19. #include "print.h"
  20. #include "debug.h"
  21. #include "util.h"
  22. #include "matrix.h"
  23. #include "wait.h"
  24. #ifndef DEBOUNCE
  25. # define DEBOUNCE 5
  26. #endif
  27. static uint8_t debouncing = DEBOUNCE;
  28. /* matrix state(1:on, 0:off) */
  29. static matrix_row_t matrix[MATRIX_ROWS];
  30. static matrix_row_t matrix_debouncing[MATRIX_ROWS];
  31. static matrix_row_t read_cols(void);
  32. static void init_cols(void);
  33. static void unselect_rows(void);
  34. static void select_row(uint8_t row);
  35. inline
  36. uint8_t matrix_rows(void)
  37. {
  38. return MATRIX_ROWS;
  39. }
  40. inline
  41. uint8_t matrix_cols(void)
  42. {
  43. return MATRIX_COLS;
  44. }
  45. /* generic STM32F103C8T6 board */
  46. #ifdef BOARD_GENERIC_STM32_F103
  47. #define LED_ON() do { palClearPad(GPIOC, GPIOC_LED) ;} while (0)
  48. #define LED_OFF() do { palSetPad(GPIOC, GPIOC_LED); } while (0)
  49. #define LED_TGL() do { palTogglePad(GPIOC, GPIOC_LED); } while (0)
  50. #endif
  51. /* Maple Mini */
  52. #ifdef BOARD_MAPLEMINI_STM32_F103
  53. #define LED_ON() do { palSetPad(GPIOB, 1) ;} while (0)
  54. #define LED_OFF() do { palClearPad(GPIOB, 1); } while (0)
  55. #define LED_TGL() do { palTogglePad(GPIOB, 1); } while (0)
  56. #endif
  57. void matrix_init(void)
  58. {
  59. // disable JTAG SWD
  60. AFIO->MAPR = AFIO_MAPR_SWJ_CFG_DISABLE;
  61. // initialize row and col
  62. unselect_rows();
  63. init_cols();
  64. // initialize matrix state: all keys off
  65. for (uint8_t i=0; i < MATRIX_ROWS; i++) {
  66. matrix[i] = 0;
  67. matrix_debouncing[i] = 0;
  68. }
  69. //debug
  70. debug_matrix = true;
  71. LED_ON();
  72. wait_ms(500);
  73. LED_OFF();
  74. }
  75. uint8_t matrix_scan(void)
  76. {
  77. for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
  78. select_row(i);
  79. wait_us(30); // without this wait read unstable value.
  80. matrix_row_t cols = read_cols();
  81. if (matrix_debouncing[i] != cols) {
  82. matrix_debouncing[i] = cols;
  83. if (debouncing) {
  84. debug("bounce!: "); debug_hex(debouncing); debug("\n");
  85. }
  86. debouncing = DEBOUNCE;
  87. }
  88. unselect_rows();
  89. }
  90. if (debouncing) {
  91. if (--debouncing) {
  92. wait_ms(1);
  93. } else {
  94. for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
  95. matrix[i] = matrix_debouncing[i];
  96. }
  97. }
  98. }
  99. return 1;
  100. }
  101. inline
  102. bool matrix_is_on(uint8_t row, uint8_t col)
  103. {
  104. return (matrix[row] & ((matrix_row_t)1<<col));
  105. }
  106. inline
  107. matrix_row_t matrix_get_row(uint8_t row)
  108. {
  109. return matrix[row];
  110. }
  111. void matrix_print(void)
  112. {
  113. print("\nr/c 0123456789ABCDEF\n");
  114. for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
  115. phex(row); print(": ");
  116. pbin_reverse16(matrix_get_row(row));
  117. print("\n");
  118. }
  119. }
  120. /* Column pin configuration
  121. */
  122. static void init_cols(void)
  123. {
  124. palSetPadMode(GPIOB, 11, PAL_MODE_INPUT_PULLUP);
  125. palSetPadMode(GPIOB, 10, PAL_MODE_INPUT_PULLUP);
  126. palSetPadMode(GPIOB, 2, PAL_MODE_INPUT_PULLUP);
  127. palSetPadMode(GPIOB, 0, PAL_MODE_INPUT_PULLUP);
  128. palSetPadMode(GPIOA, 7, PAL_MODE_INPUT_PULLUP);
  129. palSetPadMode(GPIOA, 6, PAL_MODE_INPUT_PULLUP);
  130. palSetPadMode(GPIOA, 5, PAL_MODE_INPUT_PULLUP);
  131. palSetPadMode(GPIOA, 4, PAL_MODE_INPUT_PULLUP);
  132. palSetPadMode(GPIOA, 3, PAL_MODE_INPUT_PULLUP);
  133. palSetPadMode(GPIOA, 2, PAL_MODE_INPUT_PULLUP);
  134. palSetPadMode(GPIOA, 1, PAL_MODE_INPUT_PULLUP);
  135. palSetPadMode(GPIOA, 0, PAL_MODE_INPUT_PULLUP);
  136. palSetPadMode(GPIOC, 15, PAL_MODE_INPUT_PULLUP);
  137. palSetPadMode(GPIOC, 14, PAL_MODE_INPUT_PULLUP);
  138. palSetPadMode(GPIOC, 13, PAL_MODE_INPUT_PULLUP);
  139. }
  140. /* Returns status of switches(1:on, 0:off) */
  141. static matrix_row_t read_cols(void)
  142. {
  143. return ((palReadPad(GPIOB, 11)==PAL_HIGH) ? 0 : (1<<0))
  144. | ((palReadPad(GPIOB, 10)==PAL_HIGH) ? 0 : (1<<1))
  145. | ((palReadPad(GPIOB, 2)==PAL_HIGH) ? 0 : (1<<2))
  146. | ((palReadPad(GPIOB, 0)==PAL_HIGH) ? 0 : (1<<3))
  147. | ((palReadPad(GPIOA, 7)==PAL_HIGH) ? 0 : (1<<4))
  148. | ((palReadPad(GPIOA, 6)==PAL_HIGH) ? 0 : (1<<5))
  149. | ((palReadPad(GPIOA, 5)==PAL_HIGH) ? 0 : (1<<6))
  150. | ((palReadPad(GPIOA, 4)==PAL_HIGH) ? 0 : (1<<7))
  151. | ((palReadPad(GPIOA, 3)==PAL_HIGH) ? 0 : (1<<8))
  152. | ((palReadPad(GPIOA, 2)==PAL_HIGH) ? 0 : (1<<9))
  153. | ((palReadPad(GPIOA, 1)==PAL_HIGH) ? 0 : (1<<10))
  154. | ((palReadPad(GPIOA, 0)==PAL_HIGH) ? 0 : (1<<11))
  155. | ((palReadPad(GPIOC, 15)==PAL_HIGH) ? 0 : (1<<12))
  156. | ((palReadPad(GPIOC, 14)==PAL_HIGH) ? 0 : (1<<13))
  157. | ((palReadPad(GPIOC, 13)==PAL_HIGH) ? 0 : (1<<14));
  158. }
  159. /* Row pin configuration
  160. */
  161. static void unselect_rows(void)
  162. {
  163. palSetPadMode(GPIOB, 7, PAL_MODE_INPUT); // hi-Z
  164. palSetPadMode(GPIOB, 6, PAL_MODE_INPUT); // hi-Z
  165. palSetPadMode(GPIOB, 5, PAL_MODE_INPUT); // hi-Z
  166. palSetPadMode(GPIOB, 4, PAL_MODE_INPUT); // hi-Z
  167. palSetPadMode(GPIOB, 3, PAL_MODE_INPUT); // hi-Z
  168. palSetPadMode(GPIOA, 15, PAL_MODE_INPUT); // hi-Z
  169. palSetPadMode(GPIOA, 14, PAL_MODE_INPUT); // hi-Z
  170. palSetPadMode(GPIOA, 13, PAL_MODE_INPUT); // hi-Z
  171. palSetPadMode(GPIOA, 10, PAL_MODE_INPUT); // hi-Z
  172. palSetPadMode(GPIOA, 9, PAL_MODE_INPUT); // hi-Z
  173. palSetPadMode(GPIOA, 8, PAL_MODE_INPUT); // hi-Z
  174. palSetPadMode(GPIOB, 15, PAL_MODE_INPUT); // hi-Z
  175. palSetPadMode(GPIOB, 14, PAL_MODE_INPUT); // hi-Z
  176. palSetPadMode(GPIOB, 13, PAL_MODE_INPUT); // hi-Z
  177. palSetPadMode(GPIOB, 12, PAL_MODE_INPUT); // hi-Z
  178. }
  179. static void select_row(uint8_t row)
  180. {
  181. (void)row;
  182. // Output low to select
  183. switch (row) {
  184. case 0:
  185. palSetPadMode(GPIOB, 7, PAL_MODE_OUTPUT_PUSHPULL);
  186. palClearPad(GPIOB, 7);
  187. break;
  188. case 1:
  189. palSetPadMode(GPIOB, 6, PAL_MODE_OUTPUT_PUSHPULL);
  190. palClearPad(GPIOB, 6);
  191. break;
  192. case 2:
  193. palSetPadMode(GPIOB, 5, PAL_MODE_OUTPUT_PUSHPULL);
  194. palClearPad(GPIOB, 5);
  195. break;
  196. case 3:
  197. palSetPadMode(GPIOB, 4, PAL_MODE_OUTPUT_PUSHPULL);
  198. palClearPad(GPIOB, 4);
  199. break;
  200. case 4:
  201. palSetPadMode(GPIOB, 3, PAL_MODE_OUTPUT_PUSHPULL);
  202. palClearPad(GPIOB, 3);
  203. break;
  204. case 5:
  205. palSetPadMode(GPIOA, 15, PAL_MODE_OUTPUT_PUSHPULL);
  206. palClearPad(GPIOA, 15);
  207. break;
  208. case 6:
  209. palSetPadMode(GPIOA, 14, PAL_MODE_OUTPUT_PUSHPULL);
  210. palClearPad(GPIOA, 14);
  211. break;
  212. case 7:
  213. palSetPadMode(GPIOA, 13, PAL_MODE_OUTPUT_PUSHPULL);
  214. palClearPad(GPIOA, 13);
  215. break;
  216. case 8:
  217. palSetPadMode(GPIOA, 10, PAL_MODE_OUTPUT_PUSHPULL);
  218. palClearPad(GPIOA, 10);
  219. break;
  220. case 9:
  221. palSetPadMode(GPIOA, 9, PAL_MODE_OUTPUT_PUSHPULL);
  222. palClearPad(GPIOA, 9);
  223. break;
  224. case 10:
  225. palSetPadMode(GPIOA, 8, PAL_MODE_OUTPUT_PUSHPULL);
  226. palClearPad(GPIOA, 8);
  227. break;
  228. case 11:
  229. palSetPadMode(GPIOB, 15, PAL_MODE_OUTPUT_PUSHPULL);
  230. palClearPad(GPIOB, 15);
  231. break;
  232. case 12:
  233. palSetPadMode(GPIOB, 14, PAL_MODE_OUTPUT_PUSHPULL);
  234. palClearPad(GPIOB, 14);
  235. break;
  236. case 13:
  237. palSetPadMode(GPIOB, 13, PAL_MODE_OUTPUT_PUSHPULL);
  238. palClearPad(GPIOB, 13);
  239. break;
  240. case 14:
  241. palSetPadMode(GPIOB, 12, PAL_MODE_OUTPUT_PUSHPULL);
  242. palClearPad(GPIOB, 12);
  243. break;
  244. }
  245. }