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Diffstat (limited to 'keyboards/al1/matrix.c')
| -rw-r--r-- | keyboards/al1/matrix.c | 184 |
1 files changed, 184 insertions, 0 deletions
diff --git a/keyboards/al1/matrix.c b/keyboards/al1/matrix.c new file mode 100644 index 000000000..f7ed7fbb0 --- /dev/null +++ b/keyboards/al1/matrix.c @@ -0,0 +1,184 @@ +#include <stdint.h> +#include <stdbool.h> +#include <avr/io.h> +#include <util/delay.h> +#include "print.h" +#include "debug.h" +#include "util.h" +#include "matrix.h" + +#ifndef DEBOUNCING_DELAY +# define DEBOUNCING_DELAY 5 +#endif +static uint8_t debouncing = DEBOUNCING_DELAY; + +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 unselect_cols(void); +static void select_col(uint8_t col); + +inline uint8_t matrix_rows(void) { + return MATRIX_ROWS; +} + +inline uint8_t matrix_cols(void) { + return MATRIX_COLS; +} + + +void matrix_init(void) { + // initialize row and col + 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) { + 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 = DEBOUNCING_DELAY; + } + } + 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_quantum(); + return 1; +} + +bool matrix_is_modified(void) { + if (debouncing) + return false; + else + return true; +} + +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++) { + xprintf("%02X: %032lb\n", row, bitrev32(matrix_get_row(row))); + } +} + +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; +} + +/* Row pin configuration + * + * row: 0 1 2 3 4 5 + * pin: C7 B1 B2 C6 B4 B5 + * + */ +static void init_rows(void) +{ + DDRC &= ~0b11000000; + DDRB &= ~0b00110110; + PORTC |= 0b11000000; + PORTB |= 0b00110110; +} + +static uint8_t read_rows(void) { + return (PINC&(1<<PC7) ? 0 : (1<<0)) | + (PINB&(1<<PB1) ? 0 : (1<<1)) | + (PINB&(1<<PB2) ? 0 : (1<<2)) | + (PINC&(1<<PC6) ? 0 : (1<<3)) | + (PINB&(1<<PB4) ? 0 : (1<<4)) | + (PINB&(1<<PB5) ? 0 : (1<<5)); +} + +/* Row pin configuration + * pin: D3 D7 D6 D5 D4 + * row: off 0 x x x x + * 0 1 0 0 0 0 + * 1 1 0 0 0 1 + * 2 1 0 0 1 0 + * 3 1 0 0 1 1 + * 4 1 0 1 0 0 + * 5 1 0 1 0 1 + * 6 1 0 1 1 0 + * 7 1 0 1 1 1 + * 8 1 1 0 0 0 + * 9 1 1 0 0 1 + * 10 1 1 0 1 0 + * 11 1 1 0 1 1 + * 12 1 1 1 0 0 + * 13 1 1 1 0 1 + * 14 1 1 1 1 0 + * 15 1 1 1 1 1 + */ +static void unselect_cols(void) +{ + // output high(DDR:1, PORT:1) to unselect + DDRB |= (1 << PD3); + PORTB |= (1 << PD3); +} + +static void select_col(uint8_t col) { + DDRD |= (1<<PD3 | 1<<PD4 | 1<<PD5 | 1<<PD6 | 1<<PD7); + + PORTD &= ~(1<<PD3); + + if (col & (1<<0)) { + PORTD |= (1<<PD4); + } + else { + PORTD &= ~(1<<PD4); + } + if (col & (1<<1)) { + PORTD |= (1<<PD5); + } + else { + PORTD &= ~(1<<PD5); + } + if (col & (1<<2)) { + PORTD |= (1<<PD6); + } + else { + PORTD &= ~(1<<PD6); + } + if (col & (1<<3)) { + PORTD |= (1<<PD7); + } + else { + PORTD &= ~(1<<PD7); + } +}
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