the register can not config,needed update the MCU procedure?
May I know how's your evaluation board setup? Have you followed all of the necessary procedure in setting up the eval kits and software? Have you changed anything on the hardware or everything is at default? Can you check also if you have powered up the evaluation board and the USB port is connected properly?
May I know also your PC operating system?
it works fine at first,and i can chang the register data for my testing,it seems works well all the way,but a few days later,it seems does work anymore,maybe due to incorrect operation(like plug signal cable without Power off,etc)
My PC operating system is win7 64
How about the hardware setup? Have you checked the supply pins? Does the ADC powered up properly? Have you checked if the PC detected the evaluation board (USB) as well?
Regarding the software, have you installed the latest/updated software which can be found here https://www.analog.com/media/en/evaluation-boards-kits/evaluation-software/AD7794_Evaluation_Software.zip
Only the LK8 3.3V on,other jumpers both off,i input the signal from AIN1+ ,AIN-(about 20mv),and set up the software registers for test.
The software has installed correctly.
it seems the MCU doesn't work correctly,need i update the firmware?
Does the evaluation board detected by PC upon connecting it? Can you check on device manager? The MCU/firmware should not be easily corrupted unless you have put an overvoltage or exceed abs max which potentially damaged the part. Are there any instances that this occurred?
The board has connected the computer,i have tryed change another piece of AD7794,and reinstall the software in another computer,but the same question occured,can not set the register correctly,
Do you have some ideas i can try with the EVAL board.
Thanks a lot.
It can also be a hardware issue, can you probe DVDD and AVDD to GND? Do you have a spare board as well? If you think this is a firmware issue, we do not usually provide the code for evaluation software, however, I am not sure if I can provide the compiled code.