matrix.c 8.0 KB

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287
  1. /*
  2. Copyright 2012 Jun Wako <wakojun@gmail.com>
  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 <stdint.h>
  15. #include <stdbool.h>
  16. #include "util.h"
  17. #include "matrix.h"
  18. #include "debounce.h"
  19. #include "quantum.h"
  20. #include "split_util.h"
  21. #include "config.h"
  22. #include "transport.h"
  23. #define ERROR_DISCONNECT_COUNT 5
  24. #define ROWS_PER_HAND (MATRIX_ROWS / 2)
  25. #ifdef DIRECT_PINS
  26. static pin_t direct_pins[MATRIX_ROWS][MATRIX_COLS] = DIRECT_PINS;
  27. #elif (DIODE_DIRECTION == ROW2COL) || (DIODE_DIRECTION == COL2ROW)
  28. static pin_t row_pins[MATRIX_ROWS] = MATRIX_ROW_PINS;
  29. static pin_t col_pins[MATRIX_COLS] = MATRIX_COL_PINS;
  30. #endif
  31. /* matrix state(1:on, 0:off) */
  32. extern matrix_row_t raw_matrix[MATRIX_ROWS]; // raw values
  33. extern matrix_row_t matrix[MATRIX_ROWS]; // debounced values
  34. // row offsets for each hand
  35. uint8_t thisHand, thatHand;
  36. // user-defined overridable functions
  37. __attribute__((weak)) void matrix_slave_scan_user(void) {}
  38. // matrix code
  39. #ifdef DIRECT_PINS
  40. static void init_pins(void) {
  41. for (int row = 0; row < MATRIX_ROWS; row++) {
  42. for (int col = 0; col < MATRIX_COLS; col++) {
  43. pin_t pin = direct_pins[row][col];
  44. if (pin != NO_PIN) {
  45. setPinInputHigh(pin);
  46. }
  47. }
  48. }
  49. }
  50. static bool read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row) {
  51. // Start with a clear matrix row
  52. matrix_row_t current_row_value = 0;
  53. for (uint8_t col_index = 0; col_index < MATRIX_COLS; col_index++) {
  54. pin_t pin = direct_pins[current_row][col_index];
  55. if (pin != NO_PIN) {
  56. current_row_value |= readPin(pin) ? 0 : (MATRIX_ROW_SHIFTER << col_index);
  57. }
  58. }
  59. // If the row has changed, store the row and return the changed flag.
  60. if (current_matrix[current_row] != current_row_value) {
  61. current_matrix[current_row] = current_row_value;
  62. return true;
  63. }
  64. return false;
  65. }
  66. #elif defined(DIODE_DIRECTION)
  67. # if (DIODE_DIRECTION == COL2ROW)
  68. static void select_row(uint8_t row) {
  69. setPinOutput(row_pins[row]);
  70. writePinLow(row_pins[row]);
  71. }
  72. static void unselect_row(uint8_t row) { setPinInputHigh(row_pins[row]); }
  73. static void unselect_rows(void) {
  74. for (uint8_t x = 0; x < ROWS_PER_HAND; x++) {
  75. setPinInputHigh(row_pins[x]);
  76. }
  77. }
  78. static void init_pins(void) {
  79. unselect_rows();
  80. for (uint8_t x = 0; x < MATRIX_COLS; x++) {
  81. setPinInputHigh(col_pins[x]);
  82. }
  83. }
  84. static bool read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row) {
  85. // Start with a clear matrix row
  86. matrix_row_t current_row_value = 0;
  87. // Select row and wait for row selecton to stabilize
  88. select_row(current_row);
  89. matrix_io_delay();
  90. // For each col...
  91. for (uint8_t col_index = 0; col_index < MATRIX_COLS; col_index++) {
  92. // Select the col pin to read (active low)
  93. uint8_t pin_state = readPin(col_pins[col_index]);
  94. // Populate the matrix row with the state of the col pin
  95. current_row_value |= pin_state ? 0 : (MATRIX_ROW_SHIFTER << col_index);
  96. }
  97. // Unselect row
  98. unselect_row(current_row);
  99. // If the row has changed, store the row and return the changed flag.
  100. if (current_matrix[current_row] != current_row_value) {
  101. current_matrix[current_row] = current_row_value;
  102. return true;
  103. }
  104. return false;
  105. }
  106. # elif (DIODE_DIRECTION == ROW2COL)
  107. static void select_col(uint8_t col) {
  108. setPinOutput(col_pins[col]);
  109. writePinLow(col_pins[col]);
  110. }
  111. static void unselect_col(uint8_t col) { setPinInputHigh(col_pins[col]); }
  112. static void unselect_cols(void) {
  113. for (uint8_t x = 0; x < MATRIX_COLS; x++) {
  114. setPinInputHigh(col_pins[x]);
  115. }
  116. }
  117. static void init_pins(void) {
  118. unselect_cols();
  119. for (uint8_t x = 0; x < ROWS_PER_HAND; x++) {
  120. setPinInputHigh(row_pins[x]);
  121. }
  122. }
  123. static bool read_rows_on_col(matrix_row_t current_matrix[], uint8_t current_col) {
  124. bool matrix_changed = false;
  125. // Select col and wait for col selecton to stabilize
  126. select_col(current_col);
  127. matrix_io_delay();
  128. // For each row...
  129. for (uint8_t row_index = 0; row_index < ROWS_PER_HAND; row_index++) {
  130. // Store last value of row prior to reading
  131. matrix_row_t last_row_value = current_matrix[row_index];
  132. matrix_row_t current_row_value = last_row_value;
  133. // Check row pin state
  134. if (readPin(row_pins[row_index]) == 0) {
  135. // Pin LO, set col bit
  136. current_row_value |= (MATRIX_ROW_SHIFTER << current_col);
  137. } else {
  138. // Pin HI, clear col bit
  139. current_row_value &= ~(MATRIX_ROW_SHIFTER << current_col);
  140. }
  141. // Determine if the matrix changed state
  142. if ((last_row_value != current_row_value)) {
  143. matrix_changed |= true;
  144. current_matrix[row_index] = current_row_value;
  145. }
  146. }
  147. // Unselect col
  148. unselect_col(current_col);
  149. return matrix_changed;
  150. }
  151. # else
  152. # error DIODE_DIRECTION must be one of COL2ROW or ROW2COL!
  153. # endif
  154. #else
  155. # error DIODE_DIRECTION is not defined!
  156. #endif
  157. void matrix_init(void) {
  158. split_pre_init();
  159. // Set pinout for right half if pinout for that half is defined
  160. if (!isLeftHand) {
  161. #ifdef DIRECT_PINS_RIGHT
  162. const pin_t direct_pins_right[MATRIX_ROWS][MATRIX_COLS] = DIRECT_PINS_RIGHT;
  163. for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
  164. for (uint8_t j = 0; j < MATRIX_COLS; j++) {
  165. direct_pins[i][j] = direct_pins_right[i][j];
  166. }
  167. }
  168. #endif
  169. #ifdef MATRIX_ROW_PINS_RIGHT
  170. const pin_t row_pins_right[MATRIX_ROWS] = MATRIX_ROW_PINS_RIGHT;
  171. for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
  172. row_pins[i] = row_pins_right[i];
  173. }
  174. #endif
  175. #ifdef MATRIX_COL_PINS_RIGHT
  176. const pin_t col_pins_right[MATRIX_COLS] = MATRIX_COL_PINS_RIGHT;
  177. for (uint8_t i = 0; i < MATRIX_COLS; i++) {
  178. col_pins[i] = col_pins_right[i];
  179. }
  180. #endif
  181. }
  182. thisHand = isLeftHand ? 0 : (ROWS_PER_HAND);
  183. thatHand = ROWS_PER_HAND - thisHand;
  184. // initialize key pins
  185. init_pins();
  186. // initialize matrix state: all keys off
  187. for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
  188. raw_matrix[i] = 0;
  189. matrix[i] = 0;
  190. }
  191. debounce_init(ROWS_PER_HAND);
  192. matrix_init_quantum();
  193. split_post_init();
  194. }
  195. void matrix_post_scan(void) {
  196. if (is_keyboard_master()) {
  197. static uint8_t error_count;
  198. if (!transport_master(matrix + thatHand)) {
  199. error_count++;
  200. if (error_count > ERROR_DISCONNECT_COUNT) {
  201. // reset other half if disconnected
  202. for (int i = 0; i < ROWS_PER_HAND; ++i) {
  203. matrix[thatHand + i] = 0;
  204. }
  205. }
  206. } else {
  207. error_count = 0;
  208. }
  209. matrix_scan_quantum();
  210. } else {
  211. transport_slave(matrix + thisHand);
  212. matrix_slave_scan_user();
  213. }
  214. }
  215. uint8_t matrix_scan(void) {
  216. bool changed = false;
  217. #if defined(DIRECT_PINS) || (DIODE_DIRECTION == COL2ROW)
  218. // Set row, read cols
  219. for (uint8_t current_row = 0; current_row < ROWS_PER_HAND; current_row++) {
  220. changed |= read_cols_on_row(raw_matrix, current_row);
  221. }
  222. #elif (DIODE_DIRECTION == ROW2COL)
  223. // Set col, read rows
  224. for (uint8_t current_col = 0; current_col < MATRIX_COLS; current_col++) {
  225. changed |= read_rows_on_col(raw_matrix, current_col);
  226. }
  227. #endif
  228. debounce(raw_matrix, matrix + thisHand, ROWS_PER_HAND, changed);
  229. matrix_post_scan();
  230. return (uint8_t)changed;
  231. }