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/* 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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