27 lines
549 B
C
27 lines
549 B
C
/*
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Simple routines to play notes out to a speaker
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*/
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#include <avr/io.h>
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#include <util/delay.h>
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#include "organ.h"
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#include "pinDefines.h"
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void playNote(uint16_t period, uint16_t duration) {
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uint16_t elapsed;
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uint16_t i;
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for (elapsed = 0; elapsed < duration; elapsed += period) {
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/* For loop with variable delay selects the pitch */
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for (i = 0; i < period; i++) {
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_delay_us(1);
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}
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SPEAKER_PORT ^= (1 << SPEAKER);
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}
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}
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void rest(uint16_t duration) {
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do {
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_delay_us(1);
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} while (--duration);
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}
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