- /**
- * matrix.c
- *
- Copyright 2020 astro <yuleiz@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 "quantum.h"
-
- #ifndef DEBOUNCE
- # define DEBOUNCE 5
- #endif
-
- static uint8_t debouncing = DEBOUNCE;
-
- static matrix_row_t matrix[MATRIX_ROWS];
- static matrix_row_t matrix_debouncing[MATRIX_ROWS];
-
- static uint8_t read_rows(void);
- static void init_rows(void);
- static void init_cols(void);
- static void unselect_cols(void);
- static void select_col(uint8_t col);
-
-
- __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) {}
-
- void matrix_init(void)
- {
- //setPinOutput(F0);
- //writePinHigh(F0);
- setPinOutput(B4);
- writePinLow(B4);
-
- init_cols();
- init_rows();
-
- for (uint8_t i=0; i < MATRIX_ROWS; i++) {
- matrix[i] = 0;
- matrix_debouncing[i] = 0;
- }
-
- matrix_init_kb();
- }
-
- uint8_t matrix_scan(void)
- {
- for (uint8_t col = 0; col < MATRIX_COLS; col++) {
- select_col(col);
- _delay_us(3);
-
- uint8_t rows = read_rows();
-
- for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
- bool prev_bit = matrix_debouncing[row] & ((matrix_row_t)1<<col);
- bool curr_bit = rows & (1<<row);
- if (prev_bit != curr_bit) {
- matrix_debouncing[row] ^= ((matrix_row_t)1<<col);
- debouncing = DEBOUNCE;
- }
- }
- unselect_cols();
- }
-
- if (debouncing) {
- if (--debouncing) {
- _delay_ms(1);
- } else {
- for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
- matrix[i] = matrix_debouncing[i];
- }
- }
- }
-
- matrix_scan_kb();
- return 1;
- }
-
- 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++) {
- xprintf("%02X: %032lb\n", row, bitrev32(matrix_get_row(row)));
- }
- }
-
- /*
- * Row pin configuration
- * row: 0 1 2 3 4
- * pin: PE6 PF6 PF7 PB7 PD4
- */
- static void init_rows(void)
- {
- setPinInputHigh(E6);
- setPinInputHigh(F6);
- setPinInputHigh(F7);
- setPinInputHigh(B7);
- setPinInputHigh(D4);
- }
-
- static uint8_t read_rows(void)
- {
- return ((readPin(E6) ? 0 : (1 << 0)) |
- (readPin(F6) ? 0 : (1 << 1)) |
- (readPin(F7) ? 0 : (1 << 2)) |
- (readPin(B7) ? 0 : (1 << 3)) |
- (readPin(D4) ? 0 : (1 << 4)));
- }
-
- /*
- * Columns 0 - 13
- * These columns uses two 74LVC138 3 to 8 bit demultiplexers.
- * EN Pin, PF5, PD6
- *
- * col / pin: PF0 PF1 PF4
- * 0: 0 0 0
- * 1: 1 0 0
- * 2: 0 1 0
- * 3: 1 1 0
- * 4: 0 0 1
- * 5: 1 0 1
- * 6: 0 1 1
- * PD2 PD3 PD5
- * 7: 0 0 0
- * 8: 1 0 0
- * 9: 0 1 0
- * 10: 1 1 0
- * 11: 0 0 1
- * 12: 1 0 1
- * 13: 0 1 1
- *
- */
- static void init_cols(void)
- {
- setPinOutput(F0);
- setPinOutput(F1);
- setPinOutput(F4);
- setPinOutput(F5);
-
- setPinOutput(D2);
- setPinOutput(D3);
- setPinOutput(D5);
- setPinOutput(D6);
-
- unselect_cols();
- }
-
- static void unselect_cols(void)
- {
- writePinHigh(F0);
- writePinHigh(F1);
- writePinHigh(F4);
- writePinHigh(F5);
-
- writePinHigh(D2);
- writePinHigh(D3);
- writePinHigh(D5);
- writePinHigh(D6);
- }
-
- static void select_col(uint8_t col) {
-
- switch (col) {
- case 0:
- writePinLow(F0);
- writePinLow(F1);
- writePinLow(F4);
- break;
- case 1:
- writePinHigh(F0);
- writePinLow(F1);
- writePinLow(F4);
- break;
- case 2:
- writePinLow(F0);
- writePinHigh(F1);
- writePinLow(F4);
- break;
- case 3:
- writePinHigh(F0);
- writePinHigh(F1);
- writePinLow(F4);
- break;
- case 4:
- writePinLow(F0);
- writePinLow(F1);
- writePinHigh(F4);
- break;
- case 5:
- writePinHigh(F0);
- writePinLow(F1);
- writePinHigh(F4);
- break;
- case 6:
- writePinLow(F0);
- writePinHigh(F1);
- writePinHigh(F4);
- break;
- case 7:
- writePinLow(D2);
- writePinLow(D3);
- writePinLow(D5);
- break;
- case 8:
- writePinHigh(D2);
- writePinLow(D3);
- writePinLow(D5);
- break;
- case 9:
- writePinLow(D2);
- writePinHigh(D3);
- writePinLow(D5);
- break;
- case 10:
- writePinHigh(D2);
- writePinHigh(D3);
- writePinLow(D5);
- break;
- case 11:
- writePinLow(D2);
- writePinLow(D3);
- writePinHigh(D5);
- break;
- case 12:
- writePinHigh(D2);
- writePinLow(D3);
- writePinHigh(D5);
- break;
- case 13:
- writePinLow(D2);
- writePinHigh(D3);
- writePinHigh(D5);
- break;
- }
- }
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