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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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