beatsin8()

LIB8STATIC u8 fl::beatsin8	(	accum88	beats_per_minute,
		u8	lowest = 0,
		u8	highest = 255,
		u32	timebase = 0,
		u8	phase_offset = 0 )

Generates an 8-bit sine wave at a given BPM that oscillates within a given range.

Parameters

beats_per_minute	the frequency of the wave, in decimal
lowest	the lowest output value of the sine wave
highest	the highest output value of the sine wave
timebase	the time offset of the wave from the millis() timer
phase_offset	phase offset of the wave from the current position

Examples

DemoReel100.ino, Pacifica.ino, and ParallelSPI.ino.

Definition at line 105 of file beat.h.

                                                        {
    u8 beat = beat8(beats_per_minute, timebase);
    u8 beatsin = sin8(beat + phase_offset);
    u8 rangewidth = highest - lowest;
    u8 scaledbeat = scale8(beatsin, rangewidth);
    u8 result = lowest + scaledbeat;
    if (result > highest) {
        result = highest;
    }
    return result;
}

Referenced by bpm(), loop(), pacifica_add_whitecaps(), pacifica_loop(), and updateLEDs().

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