I just implemented the program to take input from ADC and output it on DAC in SigmaStudio.But program is not working.
We are not using any Evaluation board , we have made all the circuit ourselves .We have used the circuit in application note AN-923(describing how to use ADAU1701 in Self Boot) except for we are using BC857 (instead of ZX5T953), EEPROM AT24C512, and crystal ABL-12.288MHZ-B2 (load capcitance=18pF).Also I have connected RESET and WB to DVDD.
I am attaching all the files generated by SigmaStudio, I am using file Eprom.hex in IC2 folder to burn EEPROM which i generated using this post.
I am just merely writing program in sigmastudio, i haven't configured any registers in sigmastudio because I think default value of registers will be sufficient to run this program.
Things I observe while testing circuit are
When nothing is connected to connected to ADC, the voltage at ADC inputs and the DAC ouputs is 1.5V.When I vary voltage give to ADC input (with a 100K potentiometer), then also the DAC ouputs remain 1.5V.
I am unable detect whether problem is in hardware or software. Is there anyway I can make sure the hardware is alright, any particular testing method? and if problem is in software can you suggest us any simple test program?
We donot want to use Write Back feature.Where should we connect WB pin to?
Also, what happens if the voltage at the core supply is 1.75V instead 1.8V?