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The beginnings of codec.h

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Sebastian
2025-06-01 01:09:35 +02:00
parent a17cefb4ba
commit a3a4fd4fb4
4 changed files with 276 additions and 38 deletions
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60
soundcube-i2s-test/soundcube-i2s-test.ino
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@ -7,21 +7,33 @@
I2S i2s(INPUT_PULLUP);
#define SIZE 256
#define SIZE 16
#define ECHO 192000
int16_t buffer[SIZE];
int16_t buffer2[ECHO];
int16_t volume = 0;
size_t count;
size_t tape_write = 0;
void codec_transmit() {
for(int i = 0; i < count; i++){
buffer[i] *= -1;
buffer2[tape_write] = buffer[i];
tape_write++;
if(tape_write == ECHO) tape_write = 0;
int tape_read = tape_write + 1;
if(tape_read < 0) tape_read += ECHO;
buffer[i] += buffer2[tape_read % ECHO];
}
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);
for(int i = 0; i < count; i++){
buffer[i] *= -1;
}
}
void cw(unsigned char first, unsigned char second){
@ -99,11 +111,11 @@ void setup() {
// 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(0x34, 0b10000000); // 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(0x37, 0b10000000); // 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
@ -123,7 +135,7 @@ void setup() {
cw(0x13, 0x82); // MADC 2
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(0x3d, 0b00000001); // ADC PRB_R3 = 11, PRB_R2 = 10, PRB_R1 = 01
cw(0x00, 0x01); // select page 1
cw(0x3d, 0b00000000); // ADC PTM_R4
@ -135,7 +147,7 @@ void setup() {
cw(0x0d, 0x00); // OSR DAC 128
cw(0x0e, 0x80); // OSR DAC 128
cw(0x1b, 0b00000000); // word length 16bits
cw(0x3c, 0b00000011); // PRB_P3
cw(0x3c, 0b00000001); // PRB_P3
cw(0x00, 0x01); // select page 1
cw(0x7b, 0b00000001); // set REF charging time to 40ms
@ -200,39 +212,11 @@ void setup() {
}
}
int32_t last = 0;
int frame = 0;
void loop() {
int16_t 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);
// volume += l + r;
// if(millis() - last > 1000){
// Serial.println(volume);
// volume = 0;
// last = millis();
// // STATUS FLAGS
// Serial.println("CODEC STATUS");
// cw(0x00, 0x00); // select page 0
// Serial.println("ADC Flags");
// cr(0x24, 1);
// Serial.println("DAC Flags");
// cr(0x25, 1);
// Serial.println("P0_42 - Sticky Flags");
// cr(0x2A, 1);
// Serial.println("P0_43 - Interrupt Flags");
// cr(0x2B, 1);
// Serial.println("P0_44 - Sticky Flags");
// cr(0x2C, 1);
// }
frame++;
if(frame == 48000) frame = 0;
}