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https://opencores.org/ocsvn/hf-risc/hf-risc/trunk
Subversion Repositories hf-risc
[/] [hf-risc/] [trunk/] [software/] [app/] [buzzer2.c] - Rev 18
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/* C0 = 16.35 C#0 = 17.32 DO = 18.35 D#O = 19.45 EO = 20.60 F0 = 21.83 F#0 = 23.12 G0 = 24.50 G#O = 25.96 A0 = 27.50 A#0 = 29.14 BO = 30.87 C1 = 32.70 C#1 = 34.65 D1 = 36.71 D#1 = 38.89 E1 = 41.20 F1 = 43.65 F#1 = 46.25 G1 = 49.00 G#1 = 51.91 A1 = 55.00 A#1 = 58.27 B1 = 61.74 C2 = 65.41 C#2 = 69.30 D2 = 73.42 D#2 = 77.78 E2 = 82.41 F2 = 87.31 F#2 = 92.50 G2 = 98.00 G#2 = 103.83 A2 = 110.00 A#2 = 116.54 B2 = 123.47 C3 = 130.81 C#3 = 138.59 D3 = 146.83 D#3 = 155.56 E3 = 164.81 F3 = 174.61 F#3 = 185.00 G3 = 196.00 G#3 = 207.65 A3 = 220.00 A#3 = 233.08 B3 = 246.94 C4 = 261.63 C#4 = 277.18 D4 = 293.66 D#4 = 311.13 E4 = 329.63 F4 = 349.23 F#4 = 369.99 G4 = 392.00 G#4 = 415.30 A4 = 440.00 A#4 = 466.16 B4 = 493.88 C5 = 523.25 C#5 = 554.37 D5 = 587.33 D#5 = 622.25 E5 = 659.26 F5 = 698.46 F#5 = 739.99 G5 = 783.99 G#5 = 830.61 A5 = 880.00 A#5 = 932.33 B5 = 987.77 C6 = 1046.50 C#6 = 1108.73 D6 = 1174.66 D#6 = 1244.51 E6 = 1318.51 F6 = 1396.91 F#6 = 1479.98 G6 = 1567.98 G#6 = 1661.22 A6 = 1760.00 A#6 = 1864.66 B6 = 1975.53 C7 = 2093.00 C#7 = 2217.46 D7 = 2349.32 D#7 = 2489.02 E7 = 2637.02 F7 = 2793.83 F#7 = 2959.96 G7 = 3135.96 G#7 = 3322.44 A7 = 3520.00 A#7 = 3729.31 B7 = 3951.07 */ #include <hf-risc.h> #define BUZZER_PIN 0x08 void play(uint32_t freq, uint32_t duration){ uint32_t us_wave, dly, i; us_wave = 1000000 / freq; dly = COUNTER + (CPU_SPEED / 1000) * duration; while(COUNTER < dly){ EXTIO_OUT = BUZZER_PIN; delay_us(us_wave); EXTIO_OUT = 0; delay_us(us_wave); } } int main(void){ for(;;){ // play a chromatic scale from C4 to B4 play(262, 250); play(277, 250); play(294, 250); play(311, 250); play(330, 250); play(349, 250); play(370, 250); play(392, 250); play(415, 250); play(440, 250); play(466, 250); play(494, 250); delay_ms(1000); } }
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