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/>.
24 // provides memcpy for copying TWI slave buffer
25 // #include <string.h>
29 #include <avr/interrupt.h>
30 #include <util/delay.h>
35 #include "split_util.h"
36 #include "pro_micro.h"
49 #define ERROR_DISCONNECT_COUNT 5
51 static uint8_t debouncing = DEBOUNCE;
52 static const int ROWS_PER_HAND = MATRIX_ROWS/2;
53 static uint8_t error_count = 0;
55 static const uint8_t row_pins[MATRIX_ROWS] = MATRIX_ROW_PINS;
56 static const uint8_t col_pins[MATRIX_COLS] = MATRIX_COL_PINS;
58 /* matrix state(1:on, 0:off) */
59 static matrix_row_t matrix[MATRIX_ROWS];
60 static matrix_row_t matrix_debouncing[MATRIX_ROWS];
62 static matrix_row_t read_cols(void);
63 static void init_cols(void);
64 static void unselect_rows(void);
65 static void select_row(uint8_t row);
68 __attribute__ ((weak))
69 void matrix_init_kb(void) {
73 __attribute__ ((weak))
74 void matrix_scan_kb(void) {
78 __attribute__ ((weak))
79 void matrix_init_user(void) {
82 __attribute__ ((weak))
83 void matrix_scan_user(void) {
87 uint8_t matrix_rows(void)
93 uint8_t matrix_cols(void)
98 void matrix_init(void)
103 // initialize row and col
109 // initialize matrix state: all keys off
110 for (uint8_t i=0; i < MATRIX_ROWS; i++) {
112 matrix_debouncing[i] = 0;
115 matrix_init_quantum();
118 uint8_t _matrix_scan(void)
120 // Right hand is stored after the left in the matrix so, we need to offset it
121 int offset = isLeftHand ? 0 : (ROWS_PER_HAND);
123 for (uint8_t i = 0; i < ROWS_PER_HAND; i++) {
125 _delay_us(30); // without this wait read unstable value.
126 matrix_row_t cols = read_cols();
127 if (matrix_debouncing[i+offset] != cols) {
128 matrix_debouncing[i+offset] = cols;
129 debouncing = DEBOUNCE;
138 for (uint8_t i = 0; i < ROWS_PER_HAND; i++) {
139 matrix[i+offset] = matrix_debouncing[i+offset];
149 // Get rows from other half over i2c
150 int i2c_transaction(void) {
151 int slaveOffset = (isLeftHand) ? (ROWS_PER_HAND) : 0;
153 int err = i2c_master_start(SLAVE_I2C_ADDRESS + I2C_WRITE);
154 if (err) goto i2c_error;
156 // start of matrix stored at 0x00
157 err = i2c_master_write(0x00);
158 if (err) goto i2c_error;
161 err = i2c_master_start(SLAVE_I2C_ADDRESS + I2C_READ);
162 if (err) goto i2c_error;
166 // read from TWI byte-by-byte into matrix_row_t memory space
168 for (i = 0; i < SLAVE_BUFFER_SIZE-1; ++i) {
169 *((uint8_t*)&matrix[slaveOffset]+i) = i2c_master_read(I2C_ACK);
171 // last byte to be read / end of chunk
172 *((uint8_t*)&matrix[slaveOffset]+i) = i2c_master_read(I2C_NACK);
175 // kludge for column #9: unpack bits for keys (2,9) and (3,9) from (1,7) and (1,8)
176 // i2c_master_read(I2C_ACK);
177 matrix[slaveOffset+0] = i2c_master_read(I2C_ACK);
178 // i2c_master_read(I2C_ACK);
179 matrix[slaveOffset+1] = (matrix_row_t)i2c_master_read(I2C_ACK)\
180 | (matrix[slaveOffset+0]&0x40U)<<2;
181 // i2c_master_read(I2C_ACK);
182 matrix[slaveOffset+2] = (matrix_row_t)i2c_master_read(I2C_NACK)\
183 | (matrix[slaveOffset+0]&0x80U)<<1;
184 // clear highest two bits on row 1, where the col9 bits were transported
185 matrix[slaveOffset+0] &= 0x3F;
189 i2c_error: // the cable is disconnected, or something else went wrong
199 int serial_transaction(void) {
200 int slaveOffset = (isLeftHand) ? (ROWS_PER_HAND) : 0;
202 if (serial_update_buffers()) {
206 for (int i = 0; i < ROWS_PER_HAND; ++i) {
207 matrix[slaveOffset+i] = serial_slave_buffer[i];
213 uint8_t matrix_scan(void)
215 int ret = _matrix_scan();
220 if( i2c_transaction() ) {
222 if( serial_transaction() ) {
224 // turn on the indicator led when halves are disconnected
229 if (error_count > ERROR_DISCONNECT_COUNT) {
230 // reset other half if disconnected
231 int slaveOffset = (isLeftHand) ? (ROWS_PER_HAND) : 0;
232 for (int i = 0; i < ROWS_PER_HAND; ++i) {
233 matrix[slaveOffset+i] = 0;
237 // turn off the indicator led on no error
241 matrix_scan_quantum();
245 void matrix_slave_scan(void) {
248 int offset = (isLeftHand) ? 0 : ROWS_PER_HAND;
251 // SLAVE_BUFFER_SIZE is from i2c.h
252 // (MATRIX_ROWS/2*sizeof(matrix_row_t))
253 // memcpy((void*)i2c_slave_buffer, (const void*)&matrix[offset], (ROWS_PER_HAND*sizeof(matrix_row_t)));
255 // kludge for column #9: put bits for keys (2,9) and (3,9) into (1,7) and (1,8)
256 i2c_slave_buffer[0] = (uint8_t)(matrix[offset+0])\
257 | (matrix[offset+1]&0x100U)>>2\
258 | (matrix[offset+2]&0x100U)>>1;
259 i2c_slave_buffer[1] = (uint8_t)(matrix[offset+1]);
260 i2c_slave_buffer[2] = (uint8_t)(matrix[offset+2]);
261 // note: looks like a possible operator-precedence bug here, in last version?
263 i2c_slave_buffer[1] = (uint8_t)matrix[offset+0];
264 i2c_slave_buffer[2] = (uint8_t)(matrix[offset+1]>>8);
265 i2c_slave_buffer[3] = (uint8_t)(matrix[offset+1]>>8);
266 i2c_slave_buffer[4] = (uint8_t)(matrix[offset+2]>>8);
267 i2c_slave_buffer[5] = (uint8_t)matrix[offset+2];
270 for (int i = 0; i < ROWS_PER_HAND; ++i) {
271 serial_slave_buffer[i] = matrix[offset+i];
276 bool matrix_is_modified(void)
278 if (debouncing) return false;
283 bool matrix_is_on(uint8_t row, uint8_t col)
285 return (matrix[row] & ((matrix_row_t)1<<col));
289 matrix_row_t matrix_get_row(uint8_t row)
294 void matrix_print(void)
296 print("\nr/c 0123456789ABCDEF\n");
297 for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
298 phex(row); print(": ");
299 pbin_reverse16(matrix_get_row(row));
304 uint8_t matrix_key_count(void)
307 for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
308 count += bitpop16(matrix[i]);
313 static void init_cols(void)
315 for(int x = 0; x < MATRIX_COLS; x++) {
316 _SFR_IO8((col_pins[x] >> 4) + 1) &= ~_BV(col_pins[x] & 0xF);
317 _SFR_IO8((col_pins[x] >> 4) + 2) |= _BV(col_pins[x] & 0xF);
321 static matrix_row_t read_cols(void)
323 matrix_row_t result = 0;
324 for(int x = 0; x < MATRIX_COLS; x++) {
325 result |= (_SFR_IO8(col_pins[x] >> 4) & _BV(col_pins[x] & 0xF)) ? 0 : (1 << x);
330 static void unselect_rows(void)
332 for(int x = 0; x < ROWS_PER_HAND; x++) {
333 _SFR_IO8((row_pins[x] >> 4) + 1) &= ~_BV(row_pins[x] & 0xF);
334 _SFR_IO8((row_pins[x] >> 4) + 2) |= _BV(row_pins[x] & 0xF);
338 static void select_row(uint8_t row)
340 _SFR_IO8((row_pins[row] >> 4) + 1) |= _BV(row_pins[row] & 0xF);
341 _SFR_IO8((row_pins[row] >> 4) + 2) &= ~_BV(row_pins[row] & 0xF);