Here is the code I am using:
#include "ES9028.h"

ES9028 dac = ES9028("Stereo DAC", ES9028::Stereo);

void configureDAC(ES9028 dac)
{
dac.setSerialBits(ES9028::Bits_16);
dac.setInputSelect(ES9028::InputSelect_SPDIF);
dac.setSPDIFInput(ES9028::SPDIF_Data3);
dac.setFilterShape(ES9028::Filter_Hybrid);
dac.setAutoMute(ES9028::AutoMute_MuteAndRampToGnd);
dac.setAutomuteTime(100);
dac.setGPIO1(ES9028::GPIO_Automute);
dac.setGPIO2(ES9028::GPIO_StandardInput);
dac.setGPIO3(ES9028::GPIO_StandardInput);
dac.setGPIO4(ES9028::GPIO_Lock);
dac.setDpllBandwidthSerial(ES9028::DPLL_Lowest);
dac.setVolumeMode(ES9028::Volume_UseChannel1);
dac.setAttenuation(25);
}

void setup() {
// initialize digital pin LED_BUILTIN as the DAC lock light.

Serial.begin(115200);
pinMode(LED_BUILTIN, OUTPUT);
delay(1500);
dac.mute();

configureDAC(dac);

delay(500);
dac.unmute();
}

void loop() {
Serial.println("Locked");
digitalWrite(LED_BUILTIN, dac.locked());
delay(100);
}

I still could not get any lock. I have inputs on both SPDIF and I2S. I hope I did not mess up my dac.
What could be wrong with my setup?

Alex

You need same baud rate as set in bottom right of serial monitor window

Remove firmware chip from dac - switches do nothing once that chip is removed

Hi Possum,

I think I found what the problem is. When it writes to the regs, the return status is ok, but when you read to that same reg the return status is NOT ok. In other words, it can write but could not read. Here is my test code:

/*==========*/
void writeSabreReg(byte regAddr, byte regVal)
{
Wire.beginTransmission(0x48); // Hard coded to the the Sabre/Buffalo device address for stereo
// or mono left. For stereo same as writeSabreReg()
Wire.write(regAddr); // Specifying the address of register
Wire.write(regVal); // Writing the value into the register
Wire.endTransmission();
}

byte readOne(byte regAddr) {
Wire.beginTransmission(0x48); // Hard coded the Sabre/Buffalo device address
Wire.write(regAddr); // Queues the address of the register
Wire.endTransmission(); // Sends the address of the register
Serial.println(Wire.requestFrom(0x48,1)); // Hard coded to Buffalo, request one byte from address

unsigned long retryUntil = millis() + 20;

while (!Wire.available())
{
Serial.println("Trying...");
if (millis() > retryUntil)
{
Serial.println("TimeOut...");
return 0;
}
}

return Wire.read(); // Return the value returned by specified register
}

void setup() {
Serial.begin(115200);

// Serial.begin(9600);

lcd.begin(20, 4); // Set up the LCD's number of columns and rows:
lcd.setBacklightPin(3,POSITIVE);
lcd.setBacklight(1);


writeSabreReg(1,1);

delay(200);

readOne(1);
}


This code Times Out.....
Is my DAC Bad? I hope not..... There may be something thats preventing it from reading??

Alex

Sorry possum, I am jumping ahead, I think I know how this works, I think you are doing bit wise operation. To set or clear which bit within the register.

Sorry,

Alex

BTW Are you using an I2C isolator?

Hi Possum,

Ok, I just hooked it up to my stereo system, it went through all the codes ok, but still no sound. Can you please check on the my code? I may still be missing something or setting something wrong. I tried SPDIF/Toslink and I2S.

BTW, my I2S source is DSD, is that ok? or maybe I should try PCM source and see if it works.

Thanks again,
Alex

I changed it to InputSelect_SPDIF, but still no go. Question though, does the on-board led lights that shows mute and lock, does it still work? Because on mine, the mute, lights up, but not too bright, so just asking. I may be still missing something. Just to be sure, I put back the on-board controller, and it still works fine. But the external one still not working. Any suggestions? Sorry, its taking so long..

Alex

This is how Russ's firmware works switching between SPDIF and I2s or DSD:


for SPDIF:

setAutoSelect(ES9028::AutoSelect_Disable);
setInputSelect(ES9028::InputSelect_SPDIF);

for I2S or DSD:

setAutoSelect(ES9028::AutoSelect_DSD_SERIAL);
setInputSelect(ES9028::InputSelect_SERIAL);



please also set the DpllBandwidth to DPLL_Default to begin with - not DPLL_Lowest, as that may stop you getting a lock.

Your current code will configure the GPIO pins as per the on-board firmware (lock light and automute indicator)

Give that a try

Thanks again possum, I really appreciate it. ok, so correct me if I am wrong, the difference between the two are only the setAutoSelect and setInputSelect. I will go ahead and try.

Thanks,
Alex

Hi Possum,

Its ALIVE!!, finally it works, both SPDIF and I2S/DSD works, thank you so much possum, your the greatest. Next question, I will have my controller the ability to change DpllBandwidth, FilterShape and IIR_Bandwidth, but besides these three, what other stuff can I play with. Things that will affect the sound.

Also, is there a way to check the incoming Sample Rate? or when a signal is actually playing?

Again, I want to emphasize, your code here makes it a lot simpler to customize a controller. This is the best so far that I have found.

Thank you very much, thank you for sharing..

Alex