- /* Copyright 2018 James Laird-Wah
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
- #include <quantum.h>
- #include <i2c_master.h>
- #include <string.h>
- #include "model01.h"
-
- /* If no key events have occurred, the scanners will time out on reads.
- * So we don't want to be too permissive here. */
- #define I2C_TIMEOUT 10
-
- static matrix_row_t rows[MATRIX_ROWS];
- #define ROWS_PER_HAND (MATRIX_ROWS / 2)
-
- inline
- uint8_t matrix_rows(void) {
- return MATRIX_ROWS;
- }
-
- inline
- uint8_t matrix_cols(void) {
- return MATRIX_COLS;
- }
-
- static int i2c_read_hand(int hand) {
- uint8_t buf[5];
- i2c_status_t ret = i2c_receive(I2C_ADDR(hand), buf, sizeof(buf), I2C_TIMEOUT);
- if (ret != I2C_STATUS_SUCCESS)
- return 1;
-
- if (buf[0] != TWI_REPLY_KEYDATA)
- return 2;
-
- int start_row = hand ? ROWS_PER_HAND : 0;
- uint8_t *out = &rows[start_row];
- memcpy(out, &buf[1], 4);
- return 0;
- }
-
- static int i2c_set_keyscan_interval(int hand, int delay) {
- uint8_t buf[] = {TWI_CMD_KEYSCAN_INTERVAL, delay};
- i2c_status_t ret = i2c_transmit(I2C_ADDR(hand), buf, sizeof(buf), I2C_TIMEOUT);
- return ret;
- }
-
- void matrix_init(void) {
- /* Ensure scanner power is on - else right hand will not work */
- DDRC |= _BV(7);
- PORTC |= _BV(7);
-
- i2c_init();
- i2c_set_keyscan_interval(LEFT, 2);
- i2c_set_keyscan_interval(RIGHT, 2);
- memset(rows, 0, sizeof(rows));
-
- matrix_init_quantum();
- }
-
- uint8_t matrix_scan(void) {
- uint8_t ret = 0;
- ret |= i2c_read_hand(LEFT);
- ret |= i2c_read_hand(RIGHT);
- matrix_scan_quantum();
- return ret;
- }
-
- inline
- matrix_row_t matrix_get_row(uint8_t row) {
- return rows[row];
- }
-
- void matrix_print(void) {
- print("\nr/c 0123456789ABCDEF\n");
- for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
- phex(row); print(": ");
- pbin_reverse16(matrix_get_row(row));
- print("\n");
- }
- }
-
- /* vim: set ts=2 sw=2 et: */
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