< I am using 8 ADS1256 adc's in a board and through FPGA reading the output to microcontroller on multiplexing basis
but whatever command I give ADC gives output as 00 even no data is coming on DOUT pin.
even I am not able to read configuration registers > <please give some hints to solve this problem>
microcontroller is not soft core. it's a hard core microcontroller.
in datasheet it is not given while reading or writing to status registers we have to give reset command or not. actually the board is already designed i cannot start from basic , like taking one ADC at a time , then check and all that. if the ADC is not having any problem and if I can view the input going at input pin why not the output is coming. According to datasheets the timing considerations I have taken care of.
before pointing to the ADC we have checked the FPGA programs and other sources from where fault may be caused.