105 lines
2.7 KiB
C
105 lines
2.7 KiB
C
/* Copyright 2018 James Laird-Wah
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "matrix.h"
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#include "i2c_master.h"
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#include <string.h>
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#include "model01.h"
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/* If no key events have occurred, the scanners will time out on reads.
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* So we don't want to be too permissive here. */
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#define I2C_TIMEOUT 10
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static matrix_row_t rows[MATRIX_ROWS];
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#define ROWS_PER_HAND (MATRIX_ROWS / 2)
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// user-defined overridable functions
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__attribute__((weak)) void matrix_init_kb(void) { matrix_init_user(); }
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__attribute__((weak)) void matrix_scan_kb(void) { matrix_scan_user(); }
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__attribute__((weak)) void matrix_init_user(void) {}
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__attribute__((weak)) void matrix_scan_user(void) {}
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// helper functions
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inline
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uint8_t matrix_rows(void) {
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return MATRIX_ROWS;
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}
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inline
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uint8_t matrix_cols(void) {
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return MATRIX_COLS;
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}
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static int i2c_read_hand(int hand) {
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uint8_t buf[5];
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i2c_status_t ret = i2c_receive(I2C_ADDR(hand), buf, sizeof(buf), I2C_TIMEOUT);
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if (ret != I2C_STATUS_SUCCESS)
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return 1;
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if (buf[0] != TWI_REPLY_KEYDATA)
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return 2;
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int start_row = hand ? ROWS_PER_HAND : 0;
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uint8_t *out = &rows[start_row];
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memcpy(out, &buf[1], 4);
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return 0;
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}
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static int i2c_set_keyscan_interval(int hand, int delay) {
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uint8_t buf[] = {TWI_CMD_KEYSCAN_INTERVAL, delay};
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i2c_status_t ret = i2c_transmit(I2C_ADDR(hand), buf, sizeof(buf), I2C_TIMEOUT);
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return ret;
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}
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void matrix_init(void) {
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/* Ensure scanner power is on - else right hand will not work */
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gpio_set_pin_output(C7);
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gpio_write_pin_high(C7);
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i2c_init();
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i2c_set_keyscan_interval(LEFT, 2);
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i2c_set_keyscan_interval(RIGHT, 2);
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memset(rows, 0, sizeof(rows));
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matrix_init_kb();
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}
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uint8_t matrix_scan(void) {
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uint8_t ret = 0;
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ret |= i2c_read_hand(LEFT);
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ret |= i2c_read_hand(RIGHT);
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matrix_scan_kb();
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return ret;
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}
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inline
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matrix_row_t matrix_get_row(uint8_t row) {
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return rows[row];
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}
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void matrix_print(void) {
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print("\nr/c 0123456789ABCDEF\n");
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for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
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print_hex8(row); print(": ");
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print_bin_reverse16(matrix_get_row(row));
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print("\n");
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}
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}
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/* vim: set ts=2 sw=2 et: */
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