100 lines
1.5 KiB
C
100 lines
1.5 KiB
C
#include <stdint.h>
|
|
#include "digital_slow.h"
|
|
|
|
const uint8_t PROGMEM portmask_at_pin[] = {
|
|
_BV(0), /* 0, port D */
|
|
_BV(1),
|
|
_BV(2),
|
|
_BV(3),
|
|
_BV(4),
|
|
_BV(5),
|
|
_BV(6),
|
|
_BV(7),
|
|
_BV(0), /* 8, port B */
|
|
_BV(1),
|
|
_BV(2),
|
|
_BV(3),
|
|
_BV(4),
|
|
_BV(5),
|
|
_BV(0), /* 14, port C */
|
|
_BV(1),
|
|
_BV(2),
|
|
_BV(3),
|
|
_BV(4),
|
|
_BV(5),
|
|
_BV(6),
|
|
_BV(7)
|
|
};
|
|
|
|
const uint8_t PROGMEM port_at_pin[] = {
|
|
PD, /* 0 */
|
|
PD,
|
|
PD,
|
|
PD,
|
|
PD,
|
|
PD,
|
|
PD,
|
|
PD,
|
|
PB, /* 8 */
|
|
PB,
|
|
PB,
|
|
PB,
|
|
PB,
|
|
PB,
|
|
PC, /* 14 */
|
|
PC,
|
|
PC,
|
|
PC,
|
|
PC,
|
|
PC,
|
|
PB, /* 20 */
|
|
PB
|
|
};
|
|
|
|
const uint16_t PROGMEM output_reg_at_port[] = {
|
|
0,
|
|
0,
|
|
(uint16_t) &PORTB,
|
|
(uint16_t) &PORTC,
|
|
(uint16_t) &PORTD
|
|
};
|
|
|
|
|
|
|
|
|
|
const uint16_t PROGMEM direction_reg_at_port[] = {
|
|
0,
|
|
0,
|
|
(uint16_t) &DDRB,
|
|
(uint16_t) &DDRC,
|
|
(uint16_t) &DDRD
|
|
};
|
|
|
|
void pin_mode(uint8_t pin, uint8_t mode) {
|
|
|
|
uint8_t port_mask = pgm_read_byte(portmask_at_pin + pin);
|
|
uint8_t port = pgm_read_byte(port_at_pin + pin);
|
|
|
|
volatile uint8_t *direction_register = pgm_read_byte(direction_reg_at_port + port);;
|
|
|
|
if (mode == INPUT) {
|
|
*direction_register &= ~port_mask;
|
|
} else {
|
|
*direction_register |= port_mask;
|
|
}
|
|
}
|
|
|
|
void digital_write(uint8_t pin, uint8_t value) {
|
|
volatile uint8_t *out;
|
|
|
|
uint8_t port_mask = pgm_read_byte(portmask_at_pin + pin);
|
|
uint8_t port = pgm_read_byte(port_at_pin + pin);
|
|
uint8_t *output_register = pgm_read_byte(output_reg_at_port + port);
|
|
|
|
if (0 == value) {
|
|
*output_register &= ~port_mask;
|
|
} else {
|
|
*output_register |= port_mask;
|
|
}
|
|
}
|