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5 voices at 44.1khz

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This commit is contained in:
Jack Humbert 2019-05-31 17:46:18 -04:00
parent dfb401b950
commit 73853d651a
1 changed files with 77 additions and 36 deletions
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113
quantum/audio/audio_arm.c
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@ -77,12 +77,12 @@ bool glissando = true;
#endif #endif
float startup_song[][2] = STARTUP_SONG; float startup_song[][2] = STARTUP_SONG;
#define DAC_BUFFER_SIZE 100U #define DAC_BUFFER_SIZE 256U
#ifndef DAC_SAMPLE_MAX #ifndef DAC_SAMPLE_MAX
#define DAC_SAMPLE_MAX 4095U #define DAC_SAMPLE_MAX 4095U
#endif #endif
#define DAC_SAMPLE_RATE 30000U #define DAC_SAMPLE_RATE 44100U
GPTConfig gpt7cfg1 = { GPTConfig gpt7cfg1 = {
.frequency = DAC_SAMPLE_RATE, .frequency = DAC_SAMPLE_RATE,
@ -96,52 +96,93 @@ static const dacsample_t dac_buffer[DAC_BUFFER_SIZE] = {
// [0 ... DAC_BUFFER_SIZE/2-1] = DAC_SAMPLE_MAX, // [0 ... DAC_BUFFER_SIZE/2-1] = DAC_SAMPLE_MAX,
// [DAC_BUFFER_SIZE/2 ... DAC_BUFFER_SIZE -1] = 0, // [DAC_BUFFER_SIZE/2 ... DAC_BUFFER_SIZE -1] = 0,
// max 4095 // 100 values, max 4095
0x800,0x880,0x900,0x97f,0x9fd,0xa78,0xaf1,0xb67, // 0x800,0x880,0x900,0x97f,0x9fd,0xa78,0xaf1,0xb67,
0xbda,0xc49,0xcb3,0xd19,0xd79,0xdd4,0xe29,0xe78, // 0xbda,0xc49,0xcb3,0xd19,0xd79,0xdd4,0xe29,0xe78,
0xec0,0xf02,0xf3c,0xf6f,0xf9b,0xfbf,0xfdb,0xfef, // 0xec0,0xf02,0xf3c,0xf6f,0xf9b,0xfbf,0xfdb,0xfef,
0xffb,0xfff,0xffb,0xfef,0xfdb,0xfbf,0xf9b,0xf6f, // 0xffb,0xfff,0xffb,0xfef,0xfdb,0xfbf,0xf9b,0xf6f,
0xf3c,0xf02,0xec0,0xe78,0xe29,0xdd4,0xd79,0xd19, // 0xf3c,0xf02,0xec0,0xe78,0xe29,0xdd4,0xd79,0xd19,
0xcb3,0xc49,0xbda,0xb67,0xaf1,0xa78,0x9fd,0x97f, // 0xcb3,0xc49,0xbda,0xb67,0xaf1,0xa78,0x9fd,0x97f,
0x900,0x880,0x800,0x77f,0x6ff,0x680,0x602,0x587, // 0x900,0x880,0x800,0x77f,0x6ff,0x680,0x602,0x587,
0x50e,0x498,0x425,0x3b6,0x34c,0x2e6,0x286,0x22b, // 0x50e,0x498,0x425,0x3b6,0x34c,0x2e6,0x286,0x22b,
0x1d6,0x187,0x13f,0xfd,0xc3,0x90,0x64,0x40, // 0x1d6,0x187,0x13f,0xfd,0xc3,0x90,0x64,0x40,
0x24,0x10,0x4,0x0,0x4,0x10,0x24,0x40, // 0x24,0x10,0x4,0x0,0x4,0x10,0x24,0x40,
0x64,0x90,0xc3,0xfd,0x13f,0x187,0x1d6,0x22b, // 0x64,0x90,0xc3,0xfd,0x13f,0x187,0x1d6,0x22b,
0x286,0x2e6,0x34c,0x3b6,0x425,0x498,0x50e,0x587, // 0x286,0x2e6,0x34c,0x3b6,0x425,0x498,0x50e,0x587,
0x602,0x680,0x6ff,0x77f // 0x602,0x680,0x6ff,0x77f,0x800
// 256 values, max 4095
0x800,0x832,0x864,0x896,0x8c8,0x8fa,0x92c,0x95e,
0x98f,0x9c0,0x9f1,0xa22,0xa52,0xa82,0xab1,0xae0,
0xb0f,0xb3d,0xb6b,0xb98,0xbc5,0xbf1,0xc1c,0xc47,
0xc71,0xc9a,0xcc3,0xceb,0xd12,0xd39,0xd5f,0xd83,
0xda7,0xdca,0xded,0xe0e,0xe2e,0xe4e,0xe6c,0xe8a,
0xea6,0xec1,0xedc,0xef5,0xf0d,0xf24,0xf3a,0xf4f,
0xf63,0xf76,0xf87,0xf98,0xfa7,0xfb5,0xfc2,0xfcd,
0xfd8,0xfe1,0xfe9,0xff0,0xff5,0xff9,0xffd,0xffe,
0xfff,0xffe,0xffd,0xff9,0xff5,0xff0,0xfe9,0xfe1,
0xfd8,0xfcd,0xfc2,0xfb5,0xfa7,0xf98,0xf87,0xf76,
0xf63,0xf4f,0xf3a,0xf24,0xf0d,0xef5,0xedc,0xec1,
0xea6,0xe8a,0xe6c,0xe4e,0xe2e,0xe0e,0xded,0xdca,
0xda7,0xd83,0xd5f,0xd39,0xd12,0xceb,0xcc3,0xc9a,
0xc71,0xc47,0xc1c,0xbf1,0xbc5,0xb98,0xb6b,0xb3d,
0xb0f,0xae0,0xab1,0xa82,0xa52,0xa22,0x9f1,0x9c0,
0x98f,0x95e,0x92c,0x8fa,0x8c8,0x896,0x864,0x832,
0x800,0x7cd,0x79b,0x769,0x737,0x705,0x6d3,0x6a1,
0x670,0x63f,0x60e,0x5dd,0x5ad,0x57d,0x54e,0x51f,
0x4f0,0x4c2,0x494,0x467,0x43a,0x40e,0x3e3,0x3b8,
0x38e,0x365,0x33c,0x314,0x2ed,0x2c6,0x2a0,0x27c,
0x258,0x235,0x212,0x1f1,0x1d1,0x1b1,0x193,0x175,
0x159,0x13e,0x123,0x10a,0xf2,0xdb,0xc5,0xb0,
0x9c,0x89,0x78,0x67,0x58,0x4a,0x3d,0x32,
0x27,0x1e,0x16,0xf,0xa,0x6,0x2,0x1,
0x0,0x1,0x2,0x6,0xa,0xf,0x16,0x1e,
0x27,0x32,0x3d,0x4a,0x58,0x67,0x78,0x89,
0x9c,0xb0,0xc5,0xdb,0xf2,0x10a,0x123,0x13e,
0x159,0x175,0x193,0x1b1,0x1d1,0x1f1,0x212,0x235,
0x258,0x27c,0x2a0,0x2c6,0x2ed,0x314,0x33c,0x365,
0x38e,0x3b8,0x3e3,0x40e,0x43a,0x467,0x494,0x4c2,
0x4f0,0x51f,0x54e,0x57d,0x5ad,0x5dd,0x60e,0x63f,
0x670,0x6a1,0x6d3,0x705,0x737,0x769,0x79b,0x7cd
}; };
dacsample_t dac_buffer_lr[1] = { DAC_SAMPLE_MAX / 2 }; #define DAC_VOICES_MAX 5
dacsample_t dac_buffer_lr[DAC_BUFFER_SIZE] = { DAC_SAMPLE_MAX / 2 };
float dac_if[8] = {0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0}; float dac_if[8] = {0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0};
/* /*
* DAC streaming callback. * DAC streaming callback.
*/ */
static void end_cb1(DACDriver * dacp, dacsample_t * samples, size_t pos) { static void end_cb1(DACDriver * dacp, dacsample_t * samples, size_t rows) {
(void)dacp; (void)dacp;
(void)pos; //(void)dac_buffer;
//for (uint8_t i = 0; i < DAC_BUFFER_SIZE; i++) {
//samples[0] = (dac_buffer[dac_i] + dac_buffer[dac_j]) / 2;
//}
uint16_t sample_sum = 0;
int working_voices = voices; int working_voices = voices;
if (working_voices > 3) if (working_voices > DAC_VOICES_MAX)
working_voices = 3; working_voices = DAC_VOICES_MAX;
for (int i = 0; i < working_voices; i++) {
dac_if[i] = dac_if[i] + ((frequencies[i]*(float)DAC_BUFFER_SIZE)/(float)DAC_SAMPLE_RATE*1.5);
while(dac_if[i] >= DAC_BUFFER_SIZE)
dac_if[i] = dac_if[i] - DAC_BUFFER_SIZE;
sample_sum += dac_buffer[(uint8_t)round(dac_if[i]) % DAC_BUFFER_SIZE] / working_voices;
}
if (working_voices > 0) { for (int s = 0; s < rows; s++) {
samples[0] = sample_sum; if (working_voices > 0) {
} else { uint16_t sample_sum = 0;
samples[0] = DAC_SAMPLE_MAX; for (int i = 0; i < working_voices; i++) {
dac_if[i] = dac_if[i] + ((frequencies[i]*(float)DAC_BUFFER_SIZE)/(float)DAC_SAMPLE_RATE*1.5);
while(dac_if[i] >= DAC_BUFFER_SIZE)
dac_if[i] = dac_if[i] - DAC_BUFFER_SIZE;
// sine
sample_sum += dac_buffer[(uint16_t)round(dac_if[i])] / working_voices;
// rising triangle
// sample_sum += (uint16_t)round((dac_if[i] * DAC_SAMPLE_MAX) / DAC_BUFFER_SIZE / working_voices );
// square (max 5 voices)
// sample_sum += ((dac_if[i] > (DAC_BUFFER_SIZE / 2)) ? DAC_SAMPLE_MAX / working_voices: 0);
}
samples[s] = sample_sum;
} else {
samples[s] = DAC_SAMPLE_MAX / 2;
}
} }
} }
@ -195,7 +236,7 @@ void audio_init() {
// dacStart(&DACD1, &dac1cfg1); // dacStart(&DACD1, &dac1cfg1);
// dacStartConversion(&DACD1, &dacgrpcfg1, dac_buffer_lr, 1); // dacStartConversion(&DACD1, &dacgrpcfg1, dac_buffer_lr, 1);
dacStart(&DACD2, &dac1cfg1); dacStart(&DACD2, &dac1cfg1);
dacStartConversion(&DACD2, &dacgrpcfg1, dac_buffer_lr, 1); dacStartConversion(&DACD2, &dacgrpcfg1, dac_buffer_lr, DAC_BUFFER_SIZE);
gptStart(&GPTD6, &gpt7cfg1); gptStart(&GPTD6, &gpt7cfg1);
gptStartContinuous(&GPTD6, 2U); gptStartContinuous(&GPTD6, 2U);