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