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- /* Copyright 2018 Evy Dekkers
- *
- * 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 <stdint.h>
- #include <stdbool.h>
- #if defined(__AVR__)
- #include <avr/io.h>
- #endif
- #include "wait.h"
- #include "print.h"
- #include "debug.h"
- #include "util.h"
- #include "matrix.h"
- #include "timer.h"
-
-
- /* Set 0 if debouncing isn't needed */
- #ifndef DEBOUNCE
- # define DEBOUNCE 5
- #endif
-
- #define COL_SHIFTER ((uint32_t)1)
-
- static uint16_t debouncing_time;
- static bool debouncing = false;
-
-
- static const uint8_t row_pins[MATRIX_ROWS] = MATRIX_ROW_PINS;
-
- /* matrix state(1:on, 0:off) */
- static matrix_row_t matrix[MATRIX_ROWS];
- static matrix_row_t matrix_debouncing[MATRIX_ROWS];
-
- static void init_rows(void);
- static bool read_rows_on_col(matrix_row_t current_matrix[], uint8_t current_col);
- static void unselect_cols(void);
- static void select_col(uint8_t col);
-
- __attribute__ ((weak))
- void matrix_init_user(void) {}
-
- __attribute__ ((weak))
- void matrix_scan_user(void) {}
-
- __attribute__ ((weak))
- void matrix_init_kb(void) {
- matrix_init_user();
- }
-
- __attribute__ ((weak))
- void matrix_scan_kb(void) {
- matrix_scan_user();
- }
-
- inline
- uint8_t matrix_rows(void) {
- return MATRIX_ROWS;
- }
-
- inline
- uint8_t matrix_cols(void) {
- return MATRIX_COLS;
- }
-
- void matrix_init(void) {
- unselect_cols();
- init_rows();
-
- // initialize matrix state: all keys off
- for (uint8_t i=0; i < MATRIX_ROWS; i++) {
- matrix[i] = 0;
- matrix_debouncing[i] = 0;
- }
-
- matrix_init_quantum();
- }
-
- uint8_t matrix_scan(void)
- {
- // Set col, read rows
- for (uint8_t current_col = 0; current_col < MATRIX_COLS; current_col++) {
- bool matrix_changed = read_rows_on_col(matrix_debouncing, current_col);
- if (matrix_changed) {
- debouncing = true;
- debouncing_time = timer_read();
- }
- }
-
- if (debouncing && (timer_elapsed(debouncing_time) > DEBOUNCE)) {
- for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
- matrix[i] = matrix_debouncing[i];
- }
- debouncing = false;
- }
-
- matrix_scan_quantum();
- return 1;
- }
-
- inline
- bool matrix_is_on(uint8_t row, uint8_t col)
- {
- return (matrix[row] & ((matrix_row_t)1<<col));
- }
-
- inline
- matrix_row_t matrix_get_row(uint8_t row)
- {
- return matrix[row];
- }
-
- void matrix_print(void)
- {
- print("\nr/c 0123456789ABCDEFGHIJKLMNOPQRSTUV \n");
-
- for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
- print_hex8(row); print(": ");
- print_bin_reverse32(matrix_get_row(row));
- print("\n");
- }
- }
-
- uint8_t matrix_key_count(void)
- {
- uint8_t count = 0;
- for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
- count += bitpop32(matrix[i]);
- }
- return count;
- }
-
- static bool read_rows_on_col(matrix_row_t current_matrix[], uint8_t current_col)
- {
- bool matrix_changed = false;
-
- // Select col and wait for col selecton to stabilize
- select_col(current_col);
- wait_us(30);
-
- // For each row...
- for(uint8_t row_index = 0; row_index < MATRIX_ROWS; row_index++)
- {
- // Store last value of row prior to reading
- matrix_row_t last_row_value = current_matrix[row_index];
-
- // Check row pin state
- // Use the otherwise unused row: 3, col: 0 for caps lock
- if (row_index == 2 && current_col == 2) {
- // Pin E2 uses active low
- if ((_SFR_IO8(E2 >> 4) & _BV(E2 & 0xF)) == 0)
- {
- // Pin LO, set col bit
- current_matrix[row_index] |= (COL_SHIFTER << current_col);
- }
- else
- {
- // Pin HI, clear col bit
- current_matrix[row_index] &= ~(COL_SHIFTER << current_col);
- }
- }
- else {
- if ((_SFR_IO8(row_pins[row_index] >> 4) & _BV(row_pins[row_index] & 0xF)))
- {
- // Pin HI, set col bit
- current_matrix[row_index] |= (COL_SHIFTER << current_col);
- }
- else
- {
- // Pin LO, clear col bit
- current_matrix[row_index] &= ~(COL_SHIFTER << current_col);
- }
- }
-
- // Determine if the matrix changed state
- if ((last_row_value != current_matrix[row_index]) && !(matrix_changed))
- {
- matrix_changed = true;
- }
- }
-
- // Unselect cols
- unselect_cols();
-
- return matrix_changed;
- }
-
- /* Row pin configuration
- * row: 0 1 2 3 4
- * pin: D0 D1 D2 D3 D5
- *
- * Caps lock uses its own pin E2
- */
- static void init_rows(void) {
- DDRD &= ~((1<<0)| (1<<1) | (1<<2) | (1<<3) | (1<<5)); // IN
- PORTD &= ~((1<<0)| (1<<1) | (1<<2) | (1<<3) | (1<<5)); // LO
-
- DDRE &= ~(1<<2); // IN
- PORTE |= (1<<2); // HI
- }
-
- /* Columns 0 - 16
- * col 0: B5
- * col 1: B6
- * These columns use a 74HC237D 3 to 8 bit demultiplexer.
- * A B C GL1
- * col / pin: PF0 PF1 PC7 PC6
- * 2: 0 0 0 1
- * 3: 1 0 0 1
- * 4: 0 1 0 1
- * 5: 1 1 0 1
- * 6: 0 0 1 1
- * 7: 1 0 1 1
- * 8: 0 1 1 1
- * 9: 1 1 1 1
- * col 10: E6
- * col 11: B0
- * col 12: B7
- * col 13: D4
- * col 14: D6
- * col 15: D7
- * col 16: B4
- */
- static void unselect_cols(void) {
- DDRB |= (1<<5) | (1<<6) | (1<<0) | (1<<7) | (1<<4); // OUT
- PORTB &= ~((1<<5) | (1<<6) | (1<<0) | (1<<7) | (1<<4)); // LO
-
- DDRD |= (1<<4) | (1<<6) | (1<<7); // OUT
- PORTD &= ~((1<<4) | (1<<6) | (1<<7)); // LO
-
- DDRE |= (1<<6); // OUT
- PORTE &= ~((1<<6)); // LO
-
- DDRF |= (1<<0) | (1<<1); // OUT
- PORTF &= ~((1<<0) | (1<<1)); // LO
-
- DDRC |= (1<<7) | (1<<6); // OUT
- PORTC &= ~((1<<7) | (1<<6)); // LO
- }
-
- static void select_col(uint8_t col)
- {
- switch (col) {
- case 0:
- PORTB |= (1<<5); // HI
- break;
- case 1:
- PORTB |= (1<<6); // HI
- break;
- case 2:
- PORTC |= (1<<6); // HI
- break;
- case 3:
- PORTC |= (1<<6); // HI
- PORTF |= (1<<0); // HI
- break;
- case 4:
- PORTC |= (1<<6); // HI
- PORTF |= (1<<1); // HI
- break;
- case 5:
- PORTC |= (1<<6); // HI
- PORTF |= (1<<0); // HI
- PORTF |= (1<<1); // HI
- break;
- case 6:
- PORTC |= (1<<6); // HI
- PORTC |= (1<<7); // HI
- break;
- case 7:
- PORTC |= (1<<6); // HI
- PORTF |= (1<<0); // HI
- PORTC |= (1<<7); // HI
- break;
- case 8:
- PORTC |= (1<<6); // HI
- PORTF |= (1<<1); // HI
- PORTC |= (1<<7); // HI
- break;
- case 9:
- PORTC |= (1<<6); // HI
- PORTF |= (1<<0); // HI
- PORTF |= (1<<1); // HI
- PORTC |= (1<<7); // HI
- break;
- case 10:
- PORTE |= (1<<6); // HI
- break;
- case 11:
- PORTB |= (1<<0); // HI
- break;
- case 12:
- PORTB |= (1<<7); // HI
- break;
- case 13:
- PORTD |= (1<<4); // HI
- break;
- case 14:
- PORTD |= (1<<6); // HI
- break;
- case 15:
- PORTD |= (1<<7); // HI
- break;
- case 16:
- PORTB |= (1<<4); // HI
- break;
- }
- }
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