52 lines
673 B
C
52 lines
673 B
C
#include <pentabug/rc5.h>
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#include <pentabug/hal.h>
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#define HALF_BIT_TICKS 34
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static uint8_t toggle = 0;
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static void send_bit(uint8_t bit) {
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ir_set(!bit);
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wait_ticks(HALF_BIT_TICKS);
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ir_set(bit);
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wait_ticks(HALF_BIT_TICKS);
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}
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static void send_byte_part(uint8_t byte, uint8_t length) {
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int8_t i;
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for(i = length - 1; i >= 0; --i) {
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send_bit(byte & (1 << i));
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}
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}
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void rc5_send(struct rc5_data *data) {
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// start bit
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send_bit(1);
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// field bit
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send_bit(!(data->code & (1 << 6)));
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// control bit
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send_bit(toggle);
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toggle = !toggle;
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// address
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send_byte_part(data->addr, 5);
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// command
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send_byte_part(data->code, 6);
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// done
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ir_off();
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}
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