- /*
- Copyright 2013 Oleg Kostyuk <cub.uanic@gmail.com>
- 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 "matrix.h"
- #include <stdint.h>
- #include <stdbool.h>
- #include <avr/io.h>
- #include "wait.h"
- #include "action_layer.h"
- #include "print.h"
- #include "debug.h"
- #include "util.h"
- #include "sp64.h"
- #include "debounce.h"
-
- /* matrix state(1:on, 0:off) */
- static matrix_row_t matrix[MATRIX_ROWS];
-
- // Debouncing: store for each key the number of scans until it's eligible to
- // change. When scanning the matrix, ignore any changes in keys that have
- // already changed in the last DEBOUNCE scans.
- static matrix_row_t matrix_debouncing[MATRIX_ROWS];
-
- static void matrix_select_row(uint8_t row);
-
- #ifdef RIGHT_HALF
- static uint8_t mcp23018_reset_loop = 0;
- #endif
-
- // user-defined overridable functions
-
- __attribute__((weak)) void matrix_init_kb(void) { matrix_init_user(); }
-
- __attribute__((weak)) void matrix_scan_kb(void) { matrix_scan_user(); }
-
- __attribute__((weak)) void matrix_init_user(void) {}
-
- __attribute__((weak)) void matrix_scan_user(void) {}
-
- // helper functions
- void matrix_init(void)
- {
- // all outputs for rows high
- DDRB = 0xFF;
- PORTB = 0xFF;
- // all inputs for columns
- DDRA = 0x00;
- DDRC &= ~(0x111111<<2);
- DDRD &= ~(1<<PIND7);
- // all columns are pulled-up
- PORTA = 0xFF;
- PORTC |= (0b111111<<2);
- PORTD |= (1<<PIND7);
-
- #ifdef RIGHT_HALF
- // initialize row and col
- mcp23018_status = init_mcp23018();
- #endif
-
- // initialize matrix state: all keys off
- for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
- matrix[row] = 0;
- matrix_debouncing[row] = 0;
- }
- debounce_init(MATRIX_ROWS);
- matrix_init_quantum();
- }
-
- uint8_t matrix_scan(void)
- {
- #ifdef RIGHT_HALF
- // Then the keyboard
- if (mcp23018_status != I2C_STATUS_SUCCESS) {
- if (++mcp23018_reset_loop == 0) {
- // if (++mcp23018_reset_loop >= 1300) {
- // since mcp23018_reset_loop is 8 bit - we'll try to reset once in 255 matrix scans
- // this will be approx bit more frequent than once per second
- print("trying to reset mcp23018\n");
- mcp23018_status = init_mcp23018();
- if (mcp23018_status) {
- print("left side not responding\n");
- } else {
- print("left side attached\n");
- }
- }
- }
- #endif
- bool changed = false;
- for (uint8_t row = 0; row < MATRIX_ROWS; row++)
- {
- matrix_row_t cols;
-
- matrix_select_row(row);
- #ifndef RIGHT_HALF
- _delay_us(5);
- #endif
-
- cols = (
- // cols 0..7, PORTA 0 -> 7
- (~PINA) & 0xFF
- );
-
- #ifdef RIGHT_HALF
- uint8_t data = 0x7F;
- // Receive the columns from right half
- i2c_receive(I2C_ADDR_WRITE, &data, 1, MCP23018_I2C_TIMEOUT);
- cols |= ((~(data) & 0x7F) << 7);
- #endif
-
- if (matrix_debouncing[row] != cols) {
- matrix_debouncing[row] = cols;
- //debouncing = DEBOUNCE;
- changed = true;
- }
- }
-
- debounce(matrix_debouncing, matrix, MATRIX_ROWS, changed);
-
- matrix_scan_quantum();
-
- #ifdef DEBUG_MATRIX
- for (uint8_t c = 0; c < MATRIX_COLS; c++)
- for (uint8_t r = 0; r < MATRIX_ROWS; r++)
- if (matrix_is_on(r, c)) xprintf("r:%d c:%d \n", r, c);
- #endif
-
- return (uint8_t)changed;
- }
-
- inline
- matrix_row_t matrix_get_row(uint8_t row)
- {
- return matrix[row];
- }
-
- void matrix_print(void)
- {
- print("\nr/c 0123456789ABCDEF\n");
- for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
- print_hex8(row); print(": ");
- print_bin_reverse16(matrix_get_row(row));
- print("\n");
- }
- }
-
- static void matrix_select_row(uint8_t row)
- {
- #ifdef RIGHT_HALF
- uint8_t txdata[3];
-
- //Set the remote row on port A
- txdata[0] = GPIOA;
- txdata[1] = 0xFF & ~(1<<row);
- mcp23018_status = i2c_transmit(I2C_ADDR_WRITE, (uint8_t *)txdata, 2, MCP23018_I2C_TIMEOUT);
- #endif
-
- // select other half
- DDRB = (1 << row);
- PORTB = ~(1 << row);
- }
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