35 lines
829 B
C
35 lines
829 B
C
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#include <stdbool.h>
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#include <avr/io.h>
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#include <util/delay.h>
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/* Check port settings for clock and data line */
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#if !(defined(XT_CLOCK_PORT) && \
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defined(XT_CLOCK_PIN) && \
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defined(XT_CLOCK_DDR) && \
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defined(XT_CLOCK_BIT))
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# error "XT clock port setting is required in config.h"
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#endif
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#if !(defined(XT_DATA_PORT) && \
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defined(XT_DATA_PIN) && \
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defined(XT_DATA_DDR) && \
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defined(XT_DATA_BIT))
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# error "XT data port setting is required in config.h"
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#endif
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bool clock_in(void)
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{
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XT_CLOCK_DDR &= ~(1<<XT_CLOCK_BIT);
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XT_CLOCK_PORT |= (1<<XT_CLOCK_BIT);
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_delay_us(1);
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return XT_CLOCK_PIN&(1<<XT_CLOCK_BIT);
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}
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bool data_in(void)
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{
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XT_DATA_DDR &= ~(1<<XT_DATA_BIT);
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XT_DATA_PORT |= (1<<XT_DATA_BIT);
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_delay_us(1);
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return XT_DATA_PIN&(1<<XT_DATA_BIT);
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}
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