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#include <stdbool.h>
#include <avr/io.h>
#include <util/delay.h>
/* Check port settings for clock and data line */
#if !(defined(PS2_CLOCK_PORT) && defined(PS2_CLOCK_PIN) && defined(PS2_CLOCK_DDR) && defined(PS2_CLOCK_BIT))
# error "PS/2 clock port setting is required in config.h"
#endif
#if !(defined(PS2_DATA_PORT) && defined(PS2_DATA_PIN) && defined(PS2_DATA_DDR) && defined(PS2_DATA_BIT))
# error "PS/2 data port setting is required in config.h"
#endif
/*
* Clock
*/
void clock_init(void) {}
void clock_lo(void) {
PS2_CLOCK_PORT &= ~(1 << PS2_CLOCK_BIT);
PS2_CLOCK_DDR |= (1 << PS2_CLOCK_BIT);
}
void clock_hi(void) {
/* input with pull up */
PS2_CLOCK_DDR &= ~(1 << PS2_CLOCK_BIT);
PS2_CLOCK_PORT |= (1 << PS2_CLOCK_BIT);
}
bool clock_in(void) {
PS2_CLOCK_DDR &= ~(1 << PS2_CLOCK_BIT);
PS2_CLOCK_PORT |= (1 << PS2_CLOCK_BIT);
_delay_us(1);
return PS2_CLOCK_PIN & (1 << PS2_CLOCK_BIT);
}
/*
* Data
*/
void data_init(void) {}
void data_lo(void) {
PS2_DATA_PORT &= ~(1 << PS2_DATA_BIT);
PS2_DATA_DDR |= (1 << PS2_DATA_BIT);
}
void data_hi(void) {
/* input with pull up */
PS2_DATA_DDR &= ~(1 << PS2_DATA_BIT);
PS2_DATA_PORT |= (1 << PS2_DATA_BIT);
}
bool data_in(void) {
PS2_DATA_DDR &= ~(1 << PS2_DATA_BIT);
PS2_DATA_PORT |= (1 << PS2_DATA_BIT);
_delay_us(1);
return PS2_DATA_PIN & (1 << PS2_DATA_BIT);
}
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