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dagon666/pwm_int.c

Created November 8, 2013 13:16
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pwm playback interrupt
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pwm_int.c
ISR(TIMER0_COMPA_vect, ISR_NOBLOCK) {
if (g_tail != g_head) {
OCR1AH = 0x00;
OCR1BH = 0x00;
#if MODE == MODE_8K_16B
uint16_t sample = (0x8000 + (p[(g_tail >> 6)].samples[g_tail & 0x3f]));
OCR1AL = sample >> 8 ;
OCR1BL = (sample) & 0xff;
#else
OCR1AL = p[(g_tail >> 7)].samples[g_tail & 0x7f];
#endif
g_tail = (g_tail + 1) % max_samples;
}
}
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