shermanwright/soundcube-firmware
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Codec ok, transients are quite rounded. Maybe hardware, maybe codec settings.

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Sebastian
2025-05-30 01:54:45 +02:00
parent 4da1c8fa9d
commit a17cefb4ba
1 changed files with 24 additions and 27 deletions
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51
soundcube-i2s-test/soundcube-i2s-test.ino
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@ -14,18 +14,14 @@ int16_t volume = 0;
size_t count;
void codec_transmit() {
for(int i = 0; i < count; i++){
buffer[i] *= -1;
}
i2s.write((const uint8_t *)&buffer, count * sizeof(int16_t));
}
void codec_receive(){
count = i2s.read((uint8_t *)&buffer, SIZE * sizeof(int16_t)) * sizeof(uint32_t) / sizeof(int16_t);
size_t index = 0;
volume = 0;
while (index < count) {
volume += buffer[index];
buffer[index] = 0;
index++;
}
}
void cw(unsigned char first, unsigned char second){
@ -95,18 +91,20 @@ void setup() {
// POWER and CM
cw(0x00, 0x01); // select page 1
cw(0x01, 0x08); // disable weak (crude) AVdd connection to DVdd
cw(0x02, 0x01); // enable internal AVdd LDO and enable analog blocks
cw(0x01, 0b00001000); // disable weak (crude) AVdd connection to DVdd
cw(0x02, 0b00000001); // enable internal AVdd LDO and enable analog blocks
cw(0x09, 0b00001100); // power up LOL, LOR, power down MAL, MAR, HPL, HPR
cw(0x0a, 0b01000000); // set full chip CM to 0.75V
cw(0x47, 0b00110010); // analog input quick charge time 6.4ms
cw(0x0a, 0b00001000); // set full chip CM to 0.75V
cw(0x47, 0b00110011); // analog input quick charge time 1.6ms
// ROUTING
cw(0x00, 0x01); // select page 1
cw(0x34, 0b11000000); // LEFT MICPGA P route IN1L to LEFT_P with 40k input impedance
cw(0x36, 0b11000000); // LEFT MICPGA M route CM to LEFT_M with 20k input impedance
//cw(0x36, 0b00000011); // LEFT MICPGA M route CM to LEFT_M with 20k input impedance
cw(0x37, 0b11000000); // RIGHT MICPGA P route IN1R to RIGHT_P with 20k input impedance
cw(0x39, 0b11000000); // RIGHT MICPGA M route CM to RIGHT_M with 20k input impedance
//cw(0x39, 0b00000011); // RIGHT MICPGA M route CM to RIGHT_M with 20k input impedance
cw(0x3a, 0b00111100); // connect IN2, IN3 weakly to CM
// GAIN
@ -123,11 +121,12 @@ void setup() {
cw(0x00, 0x00); // select page 0
cw(0x12, 0x81); // NADC 1
cw(0x13, 0x82); // MADC 2
cw(0x14, 0x80); // OSR ADC 128
cw(0x3d, 0b00000001); // ADC PRB_R3 = 11, PRB_R2 = 10, PRB_R1 = 01
cw(0x14, 0b10000000); // OSR ADC 128
//cw(0x14, 0b01000000); // OSR ADC 128
cw(0x3d, 0b00000010); // ADC PRB_R3 = 11, PRB_R2 = 10, PRB_R1 = 01
cw(0x00, 0x01); // select page 1
cw(0x3d, 0b01100100); // ADC PTM_R3
cw(0x3d, 0b00000000); // ADC PTM_R4
// DAC
cw(0x00, 0x00); // select page 0
@ -136,24 +135,22 @@ void setup() {
cw(0x0d, 0x00); // OSR DAC 128
cw(0x0e, 0x80); // OSR DAC 128
cw(0x1b, 0b00000000); // word length 16bits
cw(0x3c, 0x08); // PRB_P8
cw(0x3c, 0b00000011); // PRB_P3
cw(0x00, 0x01); // select page 1
cw(0x7b, 0x01); // set REF charging time to 40ms
//cw(0x14, 0x25); // set HP soft stepping for anti pop
//cw(0x0a, 0x0B); // set input CM to 0.9V and LO to 1.65V
cw(0x7b, 0b00000001); // set REF charging time to 40ms
// ROUTING
cw(0x00, 0x01); // select page 1
cw(0x0e, 0b00001000); // left DAC reconstruction filter routed to LOL
cw(0x0f, 0b00001000); // right DAC reconstruction filter routed to LOR
cw(0x03, 0b00000100); // DAC PTM_P3/4
cw(0x04, 0b00000100); // DAC PTM_P3/4
cw(0x03, 0b00000000); // DAC PTM_P3/4
cw(0x04, 0b00000000); // DAC PTM_P3/4
// LO GAIN
cw(0x00, 0x01);
cw(0x12, 0b00000010); // LOL gain 0dB
cw(0x13, 0b00000010); // LOR gain 0dB
cw(0x12, 0b00000001); // LOL gain 0dB
cw(0x13, 0b00000001); // LOR gain 0dB
// POWER UP
// ADC
@ -183,8 +180,8 @@ void setup() {
Serial.println("P0_42 - Sticky Flags");
cr(0x2A, 1);
//i2s.onTransmit(codec_transmit);
//i2s.onReceive(codec_receive);
i2s.onTransmit(codec_transmit);
i2s.onReceive(codec_receive);
i2s.setDOUT(15);
i2s.setDIN(14);
@ -195,7 +192,7 @@ void setup() {
i2s.swapClocks();
i2s.setBitsPerSample(16);
//i2s.setBuffers(6, SIZE * sizeof(int16_t) / sizeof(uint32_t));
i2s.setBuffers(6, SIZE * sizeof(int16_t) / sizeof(uint32_t));
if(!i2s.begin(48000)){
Serial.println("I2S error!");
@ -207,13 +204,13 @@ int32_t last = 0;
int frame = 0;
void loop() {
int16_t l, r;
i2s.read16(&l, &r);
//i2s.read16(&l, &r);
// float sine_pos = (2.0f * M_PI * 1000.0f * (float)frame) / (float)48000;
// l = (int16_t)(sin(sine_pos) * 8192.0f);
// r = l;
i2s.write16(l*-1, r*-1);
//i2s.write16(l*-1, r*-1);
// volume += l + r;
// if(millis() - last > 1000){