/* Column pin configuration | |
* col: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 | |
* pin: B4 B5 B6 F7 F6 F5 B0 B1 B2 B3 B7 D0 D1 C6 C7 | |
*/ | |
static void init_cols(void) | |
{ | |
// Input with pull-up(DDR:0, PORT:1) | |
DDRF &= ~(1<<7 | 1<<6 | 1<<5); | |
PORTF |= (1<<7 | 1<<6 | 1<<5); | |
DDRD &= ~(1<<1 | 1<<0); | |
PORTD |= (1<<1 | 1<<0); | |
DDRC &= ~(1<<7 | 1<<6); | |
PORTC |= (1<<7 | 1<<6); | |
DDRB &= ~(1<<7 | 1<<6 | 1<<5 | 1<<4 | 1<<3 | 1<<2 | 1<<1 | 1<<0); | |
PORTB |= (1<<7 | 1<<6 | 1<<5 | 1<<4 | 1<<3 | 1<<2 | 1<<1 | 1<<0); | |
} | |
static matrix_row_t read_cols(void) | |
{ | |
return (PINB&(1<<4) ? 0 : (1<<0)) | | |
(PINB&(1<<5) ? 0 : (1<<1)) | | |
(PINB&(1<<6) ? 0 : (1<<2)) | | |
(PINF&(1<<7) ? 0 : (1<<3)) | | |
(PINF&(1<<6) ? 0 : (1<<4)) | | |
(PINF&(1<<5) ? 0 : (1<<5)) | | |
(PINB&(1<<0) ? 0 : (1<<6)) | | |
(PINB&(1<<1) ? 0 : (1<<7)) | | |
(PINB&(1<<2) ? 0 : (1<<8)) | | |
(PINB&(1<<3) ? 0 : (1<<9)) | | |
(PINB&(1<<7) ? 0 : (1<<10)) | | |
(PIND&(1<<0) ? 0 : (1<<11)) | | |
(PIND&(1<<1) ? 0 : (1<<12)) | | |
(PINC&(1<<6) ? 0 : (1<<13)) | | |
(PINC&(1<<7) ? 0 : (1<<14)); | |
} | |
/* Row pin configuration | |
* row: 0 1 2 3 4 | |
* pin: D2 D3 D5 D4 D7 | |
*/ | |
static void unselect_rows(void) | |
{ | |
// Hi-Z(DDR:0, PORT:0) to unselect | |
DDRD &= ~0b10111100; | |
PORTD &= ~0b10111100; | |
} | |
static void select_row(uint8_t row) | |
{ | |
// Output low(DDR:1, PORT:0) to select | |
switch (row) { | |
case 0: | |
DDRD |= (1<<0); | |
PORTD &= ~(1<<0); | |
break; | |
case 1: | |
DDRD |= (1<<1); | |
PORTD &= ~(1<<1); | |
break; | |
case 2: | |
DDRD |= (1<<2); | |
PORTD &= ~(1<<2); | |
break; | |
case 3: | |
DDRD |= (1<<3); | |
PORTD &= ~(1<<3); | |
break; | |
case 4: | |
DDRD |= (1<<5); | |
PORTD &= ~(1<<5); | |
break; | |
} | |
} |
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