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180 lines
4.4 KiB
180 lines
4.4 KiB
/*
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Copyright 2013 Oleg Kostyuk <cub.uanic@gmail.com>
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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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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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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 <stdint.h>
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#include <stdbool.h>
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#include <avr/io.h>
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#include "wait.h"
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#include "action_layer.h"
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#include "print.h"
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#include "debug.h"
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#include "util.h"
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#include "sp64.h"
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#include "debounce.h"
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/* matrix state(1:on, 0:off) */
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static matrix_row_t matrix[MATRIX_ROWS];
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// Debouncing: store for each key the number of scans until it's eligible to
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// change. When scanning the matrix, ignore any changes in keys that have
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// already changed in the last DEBOUNCE scans.
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static matrix_row_t matrix_debouncing[MATRIX_ROWS];
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static void matrix_select_row(uint8_t row);
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#ifdef RIGHT_HALF
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static uint8_t mcp23018_reset_loop = 0;
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#endif
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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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{
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// all outputs for rows high
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DDRB = 0xFF;
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PORTB = 0xFF;
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// all inputs for columns
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DDRA = 0x00;
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DDRC &= ~(0x111111<<2);
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DDRD &= ~(1<<PIND7);
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// all columns are pulled-up
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PORTA = 0xFF;
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PORTC |= (0b111111<<2);
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PORTD |= (1<<PIND7);
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#ifdef RIGHT_HALF
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// initialize row and col
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mcp23018_status = init_mcp23018();
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#endif
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// initialize matrix state: all keys off
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for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
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matrix[row] = 0;
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matrix_debouncing[row] = 0;
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}
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debounce_init(MATRIX_ROWS);
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matrix_init_quantum();
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}
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uint8_t matrix_scan(void)
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{
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#ifdef RIGHT_HALF
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// Then the keyboard
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if (mcp23018_status != I2C_STATUS_SUCCESS) {
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if (++mcp23018_reset_loop == 0) {
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// if (++mcp23018_reset_loop >= 1300) {
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// since mcp23018_reset_loop is 8 bit - we'll try to reset once in 255 matrix scans
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// this will be approx bit more frequent than once per second
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print("trying to reset mcp23018\n");
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mcp23018_status = init_mcp23018();
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if (mcp23018_status) {
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print("left side not responding\n");
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} else {
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print("left side attached\n");
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}
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}
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}
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#endif
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bool changed = false;
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for (uint8_t row = 0; row < MATRIX_ROWS; row++)
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{
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matrix_row_t cols;
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matrix_select_row(row);
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#ifndef RIGHT_HALF
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_delay_us(5);
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#endif
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cols = (
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// cols 0..7, PORTA 0 -> 7
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(~PINA) & 0xFF
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);
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#ifdef RIGHT_HALF
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uint8_t data = 0x7F;
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// Receive the columns from right half
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i2c_receive(I2C_ADDR_WRITE, &data, 1, MCP23018_I2C_TIMEOUT);
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cols |= ((~(data) & 0x7F) << 7);
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#endif
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if (matrix_debouncing[row] != cols) {
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matrix_debouncing[row] = cols;
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//debouncing = DEBOUNCE;
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changed = true;
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}
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}
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debounce(matrix_debouncing, matrix, MATRIX_ROWS, changed);
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matrix_scan_quantum();
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#ifdef DEBUG_MATRIX
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for (uint8_t c = 0; c < MATRIX_COLS; c++)
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for (uint8_t r = 0; r < MATRIX_ROWS; r++)
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if (matrix_is_on(r, c)) xprintf("r:%d c:%d \n", r, c);
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#endif
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return (uint8_t)changed;
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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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{
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return matrix[row];
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}
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void matrix_print(void)
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{
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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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uint8_t matrix_key_count(void)
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{
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uint8_t count = 0;
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for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
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count += bitpop16(matrix[i]);
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}
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return count;
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}
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static void matrix_select_row(uint8_t row)
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{
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#ifdef RIGHT_HALF
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uint8_t txdata[3];
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//Set the remote row on port A
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txdata[0] = GPIOA;
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txdata[1] = 0xFF & ~(1<<row);
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mcp23018_status = i2c_transmit(I2C_ADDR_WRITE, (uint8_t *)txdata, 2, MCP23018_I2C_TIMEOUT);
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#endif
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// select other half
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DDRB = (1 << row);
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PORTB = ~(1 << row);
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}
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