diff options
| author | tmk <nobody@nowhere> | 2010-08-23 15:46:24 +0900 |
|---|---|---|
| committer | tmk <nobody@nowhere> | 2010-08-23 23:11:14 +0900 |
| commit | 3b31337cd8a5fe8b02924f2056ad2648a028c563 (patch) | |
| tree | 060cc2413f74f89c957655d3fe954ac58c3ae42d /matrix.c | |
| parent | c17f07819ffeb119a09d4acdfa5097b272d2e2f9 (diff) | |
perform nomal keyboard behavior. It works now!!!
Diffstat (limited to 'matrix.c')
| -rw-r--r-- | matrix.c | 144 |
1 files changed, 144 insertions, 0 deletions
diff --git a/matrix.c b/matrix.c new file mode 100644 index 0000000000..fc975a8fcc --- /dev/null +++ b/matrix.c @@ -0,0 +1,144 @@ +/* + * scan matrix + */ +#include <avr/io.h> +#include <util/delay.h> +#include "keymap.h" +#include "matrix.h" +#include "print.h" + +uint8_t *matrix; +uint8_t *prev_matrix; +static uint8_t _matrix0[MATRIX_ROWS]; +static uint8_t _matrix1[MATRIX_ROWS]; + +static uint8_t read_col(void); +static void select_row(uint8_t row); + + +void matrix_init(void) +{ + // Column: input w/pullup + DDRB = 0x00; + PORTB = 0xFF; + + // Row: Hi-Z(unselected) + // PD:0,1,2,3,6,7 + // PC:6,7 + // PF:7 + DDRD = 0x00; + PORTD = 0x00; + DDRC = 0x00; + PORTC = 0x00; + DDRF = 0x00; + PORTF = 0x00; + + for (int i=0; i < MATRIX_ROWS; i++) { + _matrix0[i] = 0xFF; + _matrix1[i] = 0xFF; + } + matrix = _matrix0; + prev_matrix = _matrix1; +} + +uint8_t matrix_scan(void) +{ + uint8_t row, state; + uint8_t *tmp; + + tmp = prev_matrix; + prev_matrix = matrix; + matrix = tmp; + + for (row = 0; row < MATRIX_ROWS; row++) { + select_row(row); + _delay_us(30); // without this wait read unstable value. + state = read_col(); + + matrix[row] = state; + } + return 1; +} + +static uint8_t read_col(void) +{ + return PINB; +} + +static void select_row(uint8_t row) +{ + switch (row) { + case 0: + DDRD = (1<<0); + PORTD = 0x00; + DDRC = 0x00; + PORTC = 0x00; + DDRF = 0x00; + PORTF = 0x00; + break; + case 1: + DDRD = (1<<1); + PORTD = 0x00; + DDRC = 0x00; + PORTC = 0x00; + DDRF = 0x00; + PORTF = 0x00; + break; + case 2: + DDRD = (1<<2); + PORTD = 0x00; + DDRC = 0x00; + PORTC = 0x00; + DDRF = 0x00; + PORTF = 0x00; + break; + case 3: + DDRD = (1<<3); + PORTD = 0x00; + DDRC = 0x00; + PORTC = 0x00; + DDRF = 0x00; + PORTF = 0x00; + break; + case 4: + DDRD = (1<<6); + PORTD = 0x00; + DDRC = 0x00; + PORTC = 0x00; + DDRF = 0x00; + PORTF = 0x00; + break; + case 5: + DDRD = (1<<7); + PORTD = 0x00; + DDRC = 0x00; + PORTC = 0x00; + DDRF = 0x00; + PORTF = 0x00; + break; + case 6: + DDRD = 0x00; + PORTD = 0x00; + DDRC = (1<<6); + PORTC = 0x00; + DDRF = 0x00; + PORTF = 0x00; + break; + case 7: + DDRD = 0x00; + PORTD = 0x00; + DDRC = (1<<7); + PORTC = 0x00; + DDRF = 0x00; + PORTF = 0x00; + break; + case 8: + DDRD = 0x00; + PORTD = 0x00; + DDRC = 0x00; + PORTC = 0x00; + DDRF = (1<<7); + PORTF = 0x00; + break; + } +} |