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/* Copyright 2017-2019 Nikolaus Wittenstein <nikolaus.wittenstein@gmail.com>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
* REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
* INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
* LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
* OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
#include "datahand.h"
#include "matrix.h"
#include "action.h"
#include <stdint.h>
#include <stdbool.h>
#include <avr/io.h>
static matrix_row_t matrix[MATRIX_ROWS];
static matrix_row_t read_cols(void);
static void select_row(uint8_t row);
void matrix_init(void) {
/* See datahand.h for more detail on pins. */
/* 7 - matrix scan; 6-3 - mode LEDs */
DDRB = 0b11111000;
/* 1-0 - matrix scan */
DDRD = 0b00000011;
/* 6 - matrix scan */
DDRE = 0b01000000;
/* 7-4 - lock LEDs */
DDRF = 0b11110000;
/* Turn off the non-Normal LEDs (they're active low). */
PORTB |= LED_TENKEY | LED_FN | LED_NAS;
/* Turn off the lock LEDs. */
PORTF |= LED_CAPS_LOCK | LED_NUM_LOCK | LED_SCROLL_LOCK | LED_MOUSE_LOCK;
matrix_init_user();
}
uint8_t matrix_scan(void) {
for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
select_row(row);
/* The default hardware works down to at least 100us, but I have a replacement
* photodiode that responds a little more slowly. Cranking it up to 1000us fixes
* shadowing issues.
*/
_delay_us(1000);
matrix[row] = read_cols();
}
matrix_scan_user();
return 1;
}
matrix_row_t matrix_get_row(uint8_t row) {
return matrix[row];
}
void matrix_print(void) {
print("\nr/c 01234567\n");
for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
print_hex8(row);
print(": ");
print_bin_reverse8(matrix_get_row(row));
print("\n");
}
}
static void select_row(uint8_t row) {
/* Original 8051: P1 bits 0-3 (pins 1-4)
* Teensy++: PE0, PB7, PD0, PD1
*/
if (row & (1<<0)) {
PORTE |= (1<<6);
} else {
PORTE &= ~(1<<6);
}
if (row & (1<<1)) {
PORTB |= (1<<7);
} else {
PORTB &= ~(1<<7);
}
if (row & (1<<2)) {
PORTD |= (1<<0);
} else {
PORTD &= ~(1<<0);
}
if (row & (1<<3)) {
PORTD |= (1<<1);
} else {
PORTD &= ~(1<<1);
}
}
static matrix_row_t read_cols(void) {
/* Original 8051: P1 bits 4-7 (pins 5-8)
* Teensy++: PD bits 2-5
*/
return (PIND & 0b00111100) >> 2;
}
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