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- #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 "matrix.h"
- #include "ergodone.h"
- #include "expander.h"
-
- /*
- * This constant define not debouncing time in msecs, but amount of matrix
- * scan loops which should be made to get stable debounced results.
- *
- * On Ergodox matrix scan rate is relatively low, because of slow I2C.
- * Now it's only 317 scans/second, or about 3.15 msec/scan.
- * According to Cherry specs, debouncing time is 5 msec.
- *
- * And so, there is no sense to have DEBOUNCE higher than 2.
- */
-
- #ifndef DEBOUNCE
- # define DEBOUNCE 5
- #endif
-
- /* 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 uint8_t debounce_matrix[MATRIX_ROWS * MATRIX_COLS];
-
- static matrix_row_t read_cols(uint8_t row);
- static void init_cols(void);
- static void unselect_rows(void);
- static void select_row(uint8_t row);
-
- __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_rows();
- init_cols();
-
- // initialize matrix state: all keys off
- for (uint8_t i=0; i < MATRIX_ROWS; i++) {
- matrix[i] = 0;
- for (uint8_t j=0; j < MATRIX_COLS; ++j) {
- debounce_matrix[i * MATRIX_COLS + j] = 0;
- }
- }
-
- matrix_init_quantum();
- }
-
- void matrix_power_up(void) {
- unselect_rows();
- init_cols();
-
- // initialize matrix state: all keys off
- for (uint8_t i=0; i < MATRIX_ROWS; i++) {
- matrix[i] = 0;
- }
- }
-
- // Returns a matrix_row_t whose bits are set if the corresponding key should be
- // eligible to change in this scan.
- matrix_row_t debounce_mask(uint8_t row) {
- matrix_row_t result = 0;
- for (uint8_t j=0; j < MATRIX_COLS; ++j) {
- if (debounce_matrix[row * MATRIX_COLS + j]) {
- --debounce_matrix[row * MATRIX_COLS + j];
- } else {
- result |= (1 << j);
- }
- }
- return result;
- }
-
- // Report changed keys in the given row. Resets the debounce countdowns
- // corresponding to each set bit in 'change' to DEBOUNCE.
- void debounce_report(matrix_row_t change, uint8_t row) {
- for (uint8_t i = 0; i < MATRIX_COLS; ++i) {
- if (change & (1 << i)) {
- debounce_matrix[row * MATRIX_COLS + i] = DEBOUNCE;
- }
- }
- }
-
- uint8_t matrix_scan(void)
- {
- expander_scan();
-
- for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
- select_row(i);
- wait_us(30); // without this wait read unstable value.
- matrix_row_t mask = debounce_mask(i);
- matrix_row_t cols = (read_cols(i) & mask) | (matrix[i] & ~mask);
- debounce_report(cols ^ matrix[i], i);
- matrix[i] = cols;
-
- unselect_rows();
- }
-
- 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 0123456789ABCDEF\n");
- for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
- phex(row); print(": ");
- pbin_reverse16(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 += bitpop16(matrix[i]);
- }
- return count;
- }
-
- /* Column pin configuration
- *
- * Pro Micro: 6 5 4 3 2 1 0
- * PD3 PD2 PD4 PC6 PD7 PE6 PB4
- *
- * Expander: 13 12 11 10 9 8 7
- */
- static void init_cols(void)
- {
- // Pro Micro
- DDRE &= ~(1<<PE6);
- PORTE |= (1<<PE6);
- DDRD &= ~(1<<PD2 | 1<<PD3 | 1<<PD4 | 1<<PD7);
- PORTD |= (1<<PD2 | 1<<PD3 | 1<<PD4 | 1<<PD7);
- DDRC &= ~(1<<PC6);
- PORTC |= (1<<PC6);
- DDRB &= ~(1<<PB4);
- PORTB |= (1<<PB4);
-
- // MCP23017
- expander_init();
- }
-
- static matrix_row_t read_cols(uint8_t row)
- {
- return expander_read_row() |
- (PIND&(1<<PD3) ? 0 : (1<<6)) |
- (PIND&(1<<PD2) ? 0 : (1<<5)) |
- (PIND&(1<<PD4) ? 0 : (1<<4)) |
- (PINC&(1<<PC6) ? 0 : (1<<3)) |
- (PIND&(1<<PD7) ? 0 : (1<<2)) |
- (PINE&(1<<PE6) ? 0 : (1<<1)) |
- (PINB&(1<<PB4) ? 0 : (1<<0)) ;
- }
-
- /* Row pin configuration
- *
- * Pro Micro: 0 1 2 3 4 5
- * F4 F5 F6 F7 B1 B2
- *
- * Expander: 0 1 2 3 4 5
- */
- static void unselect_rows(void)
- {
- // Pro Micro
- DDRF &= ~(1<<PF4 | 1<<PF5 | 1<<PF6 | 1<<PF7);
- PORTF &= ~(1<<PF4 | 1<<PF5 | 1<<PF6 | 1<<PF7);
- DDRB &= ~(1<<PB1 | 1<<PB2);
- PORTB &= ~(1<<PB1 | 1<<PB2);
-
- // Expander
- expander_unselect_rows();
- }
-
- static void select_row(uint8_t row)
- {
- // Pro Micro
- switch (row) {
- case 0:
- DDRF |= (1<<PF4);
- PORTF &= ~(1<<PF4);
- break;
- case 1:
- DDRF |= (1<<PF5);
- PORTF &= ~(1<<PF5);
- break;
- case 2:
- DDRF |= (1<<PF6);
- PORTF &= ~(1<<PF6);
- break;
- case 3:
- DDRF |= (1<<PF7);
- PORTF &= ~(1<<PF7);
- break;
- case 4:
- DDRB |= (1<<PB1);
- PORTB &= ~(1<<PB1);
- break;
- case 5:
- DDRB |= (1<<PB2);
- PORTB &= ~(1<<PB2);
- break;
- }
-
- expander_select_row(row);
- }
-
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