2 Copyright 2012 Jun Wako <wakojun@gmail.com>
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.
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.
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/>.
29 #include "split_util.h"
30 #include "pro_micro.h"
40 #ifndef DEBOUNCING_DELAY
41 # define DEBOUNCING_DELAY 5
44 #if (DEBOUNCING_DELAY > 0)
45 static uint16_t debouncing_time;
46 static bool debouncing = false;
49 #if (MATRIX_COLS <= 8)
50 # define print_matrix_header() print("\nr/c 01234567\n")
51 # define print_matrix_row(row) print_bin_reverse8(matrix_get_row(row))
52 # define matrix_bitpop(i) bitpop(matrix[i])
53 # define ROW_SHIFTER ((uint8_t)1)
55 # error "Currently only supports 8 COLS"
57 static matrix_row_t matrix_debouncing[MATRIX_ROWS];
59 #define ERROR_DISCONNECT_COUNT 5
61 #define ROWS_PER_HAND (MATRIX_ROWS/2)
63 static uint8_t error_count = 0;
65 static const uint8_t row_pins[MATRIX_ROWS] = MATRIX_ROW_PINS;
66 static const uint8_t col_pins[MATRIX_COLS] = MATRIX_COL_PINS;
68 /* matrix state(1:on, 0:off) */
69 static matrix_row_t matrix[MATRIX_ROWS];
70 static matrix_row_t matrix_debouncing[MATRIX_ROWS];
72 #if (DIODE_DIRECTION == COL2ROW)
73 static void init_cols(void);
74 static bool read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row);
75 static void unselect_rows(void);
76 static void select_row(uint8_t row);
77 static void unselect_row(uint8_t row);
78 #elif (DIODE_DIRECTION == ROW2COL)
79 static void init_rows(void);
80 static bool read_rows_on_col(matrix_row_t current_matrix[], uint8_t current_col);
81 static void unselect_cols(void);
82 static void unselect_col(uint8_t col);
83 static void select_col(uint8_t col);
86 __attribute__ ((weak))
87 void matrix_init_kb(void) {
91 __attribute__ ((weak))
92 void matrix_scan_kb(void) {
96 __attribute__ ((weak))
97 void matrix_init_user(void) {
100 __attribute__ ((weak))
101 void matrix_scan_user(void) {
105 uint8_t matrix_rows(void)
111 uint8_t matrix_cols(void)
116 void matrix_init(void)
121 // initialize row and col
122 #if (DIODE_DIRECTION == COL2ROW)
125 #elif (DIODE_DIRECTION == ROW2COL)
132 // initialize matrix state: all keys off
133 for (uint8_t i=0; i < MATRIX_ROWS; i++) {
135 matrix_debouncing[i] = 0;
138 matrix_init_quantum();
142 uint8_t _matrix_scan(void)
144 int offset = isLeftHand ? 0 : (ROWS_PER_HAND);
145 #if (DIODE_DIRECTION == COL2ROW)
146 // Set row, read cols
147 for (uint8_t current_row = 0; current_row < ROWS_PER_HAND; current_row++) {
148 # if (DEBOUNCING_DELAY > 0)
149 bool matrix_changed = read_cols_on_row(matrix_debouncing+offset, current_row);
151 if (matrix_changed) {
153 debouncing_time = timer_read();
157 read_cols_on_row(matrix+offset, current_row);
162 #elif (DIODE_DIRECTION == ROW2COL)
163 // Set col, read rows
164 for (uint8_t current_col = 0; current_col < MATRIX_COLS; current_col++) {
165 # if (DEBOUNCING_DELAY > 0)
166 bool matrix_changed = read_rows_on_col(matrix_debouncing+offset, current_col);
167 if (matrix_changed) {
169 debouncing_time = timer_read();
172 read_rows_on_col(matrix+offset, current_col);
178 # if (DEBOUNCING_DELAY > 0)
179 if (debouncing && (timer_elapsed(debouncing_time) > DEBOUNCING_DELAY)) {
180 for (uint8_t i = 0; i < ROWS_PER_HAND; i++) {
181 matrix[i+offset] = matrix_debouncing[i+offset];
192 // Get rows from other half over i2c
193 int i2c_transaction(void) {
194 int slaveOffset = (isLeftHand) ? (ROWS_PER_HAND) : 0;
196 int err = i2c_master_start(SLAVE_I2C_ADDRESS + I2C_WRITE);
197 if (err) goto i2c_error;
199 // start of matrix stored at 0x00
200 err = i2c_master_write(0x00);
201 if (err) goto i2c_error;
204 err = i2c_master_start(SLAVE_I2C_ADDRESS + I2C_READ);
205 if (err) goto i2c_error;
209 for (i = 0; i < ROWS_PER_HAND-1; ++i) {
210 matrix[slaveOffset+i] = i2c_master_read(I2C_ACK);
212 matrix[slaveOffset+i] = i2c_master_read(I2C_NACK);
215 i2c_error: // the cable is disconnceted, or something else went wrong
225 int serial_transaction(void) {
226 int slaveOffset = (isLeftHand) ? (ROWS_PER_HAND) : 0;
228 if (serial_update_buffers()) {
232 for (int i = 0; i < ROWS_PER_HAND; ++i) {
233 matrix[slaveOffset+i] = serial_slave_buffer[i];
239 uint8_t matrix_scan(void)
241 uint8_t ret = _matrix_scan();
244 if( i2c_transaction() ) {
246 if( serial_transaction() ) {
248 // turn on the indicator led when halves are disconnected
253 if (error_count > ERROR_DISCONNECT_COUNT) {
254 // reset other half if disconnected
255 int slaveOffset = (isLeftHand) ? (ROWS_PER_HAND) : 0;
256 for (int i = 0; i < ROWS_PER_HAND; ++i) {
257 matrix[slaveOffset+i] = 0;
261 // turn off the indicator led on no error
265 matrix_scan_quantum();
269 void matrix_slave_scan(void) {
272 int offset = (isLeftHand) ? 0 : ROWS_PER_HAND;
275 for (int i = 0; i < ROWS_PER_HAND; ++i) {
276 i2c_slave_buffer[i] = matrix[offset+i];
279 for (int i = 0; i < ROWS_PER_HAND; ++i) {
280 serial_slave_buffer[i] = matrix[offset+i];
285 bool matrix_is_modified(void)
287 if (debouncing) return false;
292 bool matrix_is_on(uint8_t row, uint8_t col)
294 return (matrix[row] & ((matrix_row_t)1<<col));
298 matrix_row_t matrix_get_row(uint8_t row)
303 void matrix_print(void)
305 print("\nr/c 0123456789ABCDEF\n");
306 for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
307 phex(row); print(": ");
308 pbin_reverse16(matrix_get_row(row));
313 uint8_t matrix_key_count(void)
316 for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
317 count += bitpop16(matrix[i]);
322 #if (DIODE_DIRECTION == COL2ROW)
324 static void init_cols(void)
326 for(uint8_t x = 0; x < MATRIX_COLS; x++) {
327 uint8_t pin = col_pins[x];
328 _SFR_IO8((pin >> 4) + 1) &= ~_BV(pin & 0xF); // IN
329 _SFR_IO8((pin >> 4) + 2) |= _BV(pin & 0xF); // HI
333 static bool read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row)
335 // Store last value of row prior to reading
336 matrix_row_t last_row_value = current_matrix[current_row];
338 // Clear data in matrix row
339 current_matrix[current_row] = 0;
341 // Select row and wait for row selecton to stabilize
342 select_row(current_row);
346 for(uint8_t col_index = 0; col_index < MATRIX_COLS; col_index++) {
348 // Select the col pin to read (active low)
349 uint8_t pin = col_pins[col_index];
350 uint8_t pin_state = (_SFR_IO8(pin >> 4) & _BV(pin & 0xF));
352 // Populate the matrix row with the state of the col pin
353 current_matrix[current_row] |= pin_state ? 0 : (ROW_SHIFTER << col_index);
357 unselect_row(current_row);
359 return (last_row_value != current_matrix[current_row]);
362 static void select_row(uint8_t row)
364 uint8_t pin = row_pins[row];
365 _SFR_IO8((pin >> 4) + 1) |= _BV(pin & 0xF); // OUT
366 _SFR_IO8((pin >> 4) + 2) &= ~_BV(pin & 0xF); // LOW
369 static void unselect_row(uint8_t row)
371 uint8_t pin = row_pins[row];
372 _SFR_IO8((pin >> 4) + 1) &= ~_BV(pin & 0xF); // IN
373 _SFR_IO8((pin >> 4) + 2) |= _BV(pin & 0xF); // HI
376 static void unselect_rows(void)
378 for(uint8_t x = 0; x < ROWS_PER_HAND; x++) {
379 uint8_t pin = row_pins[x];
380 _SFR_IO8((pin >> 4) + 1) &= ~_BV(pin & 0xF); // IN
381 _SFR_IO8((pin >> 4) + 2) |= _BV(pin & 0xF); // HI
385 #elif (DIODE_DIRECTION == ROW2COL)
387 static void init_rows(void)
389 for(uint8_t x = 0; x < ROWS_PER_HAND; x++) {
390 uint8_t pin = row_pins[x];
391 _SFR_IO8((pin >> 4) + 1) &= ~_BV(pin & 0xF); // IN
392 _SFR_IO8((pin >> 4) + 2) |= _BV(pin & 0xF); // HI
396 static bool read_rows_on_col(matrix_row_t current_matrix[], uint8_t current_col)
398 bool matrix_changed = false;
400 // Select col and wait for col selecton to stabilize
401 select_col(current_col);
405 for(uint8_t row_index = 0; row_index < ROWS_PER_HAND; row_index++)
408 // Store last value of row prior to reading
409 matrix_row_t last_row_value = current_matrix[row_index];
411 // Check row pin state
412 if ((_SFR_IO8(row_pins[row_index] >> 4) & _BV(row_pins[row_index] & 0xF)) == 0)
414 // Pin LO, set col bit
415 current_matrix[row_index] |= (ROW_SHIFTER << current_col);
419 // Pin HI, clear col bit
420 current_matrix[row_index] &= ~(ROW_SHIFTER << current_col);
423 // Determine if the matrix changed state
424 if ((last_row_value != current_matrix[row_index]) && !(matrix_changed))
426 matrix_changed = true;
431 unselect_col(current_col);
433 return matrix_changed;
436 static void select_col(uint8_t col)
438 uint8_t pin = col_pins[col];
439 _SFR_IO8((pin >> 4) + 1) |= _BV(pin & 0xF); // OUT
440 _SFR_IO8((pin >> 4) + 2) &= ~_BV(pin & 0xF); // LOW
443 static void unselect_col(uint8_t col)
445 uint8_t pin = col_pins[col];
446 _SFR_IO8((pin >> 4) + 1) &= ~_BV(pin & 0xF); // IN
447 _SFR_IO8((pin >> 4) + 2) |= _BV(pin & 0xF); // HI
450 static void unselect_cols(void)
452 for(uint8_t x = 0; x < MATRIX_COLS; x++) {
453 uint8_t pin = col_pins[x];
454 _SFR_IO8((pin >> 4) + 1) &= ~_BV(pin & 0xF); // IN
455 _SFR_IO8((pin >> 4) + 2) |= _BV(pin & 0xF); // HI