I have an ADS1298 kit and I developed a board of my own using an MSP430f5529 to communicate with the ads1298 board. Everything worked just fine.
Recently I bought an ADS1198 kit and when I tried to use it with the same MSP430 board, it didn't work. The ADS1198 board is working with the MMB0 board, but not with mine.
When I watched the SPI SOMI with the oscilloscope, I noticed that the board is triggering DRDY, but when the SCLK is sent, nothing comes out of the SPI.
The registers values are set the same way that the LabView software does, the AVDD and DVDD are configured the same way my ADS1298 was and the initialization sequence is also the same I used on my ADS1298.
Any idea what could be wrong?
Welcome to our forum! Have you verified that all the jumpers on the ADS1198 board are in the same way as they are on the ADS1298 board? There is no difference between the two boards except for the actual device soldered onto the PWB, so if the jumpers are all correct, the ADS1198 should work the same way as the ADS1298 (with the exception of the data length).
Thank you for your quick response.
Yes, all the jumpers are configured the same way as in the AS1298 board.
I believe I've found the problem. I think the ADS1198 board and the ADS1298 board are not equal. The CS pin on the ADS1198 board have a pull-up resistor, and on the ADS1298 board there is no such resistor, as shown on the attached images.
By disabling the pull-up and controlling the CS directly from my board, I managed to make it work.
Great news! The original ADS1298 board was built with the BGA package. The current ADS1298EVM's are using the TQFP, so they share the same PWB. Sorry that I overlooked the /CS thing, but I'm glad to see you found that and got the system running. Let us know how you make out with the MSP430.
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