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Original question:

ADS112U04EVM: Delta-Sigma ADC Evaluation Software: Unable to Identify device = ADS112U04

ADS125H02EVM: Device unrecognized due to SPI error.

Rumeysa Dogan
Prodigy 20 points
Part Number: ADS125H02EVM

Hello, 

I am trying to use ADS125H0EVM evaluation board. I followed the instructions to download GUI then later downloaded the device package to a public path. 

Driver:

Drivers path:

C:\Program Files (x86)\Texas Instruments\DSEvalSW

Device packages path:

C:\Users\admin\Documents\DSEvalSW

When I start the GUI first and connect the EVM board afterwards, the GUI will not recognise the board.

When I conect the board first and start then the GUI software, I receive the message "Unable to Identify device = An" and after a few seconds: " Hardware Connected. Ready..."

The registers are not displayed.

In the console section there is an error message: 

What should I do? 

  • 0
    TI__Mastermind 38271 points

    Hi Rumeysa Dogan,

    Have you applied the +/-15V power supplies to the board? If not, please see the user's guide for more information

    Also, as you found out, the EVM must be plugged into the computer before starting the GUI. The opposite process does not work.

    -Bryan

  • 0 in reply to Bryan Lizon86
    Prodigy 20 points

    Hello Bryan, 

    Thank you for your response. I applied +/-15V power supplies to the board but unfortunately registers are not displayed in GUI. Same SPI error is available. When I press the S2 button, there is a WREG error. I don't know what is wrong. 

  • 0 in reply to Rumeysa Dogan
    TI__Mastermind 38271 points

    Hi Rumeysa Dogan,

    Can you please send a high resolution image of you board setup and how the power supplies are configured?

    -Bryan

  • 0 in reply to Bryan Lizon86
    Prodigy 20 points

    GND to the middle of J4 block, +15V to left and -15 to the right. S1 is in the left position. 

  • 0 in reply to Rumeysa Dogan
    TI__Mastermind 38271 points

    Hi Rumeysa Dogan,

    It looks like you made several modifications to your board, so you might have to backtrack through your modifications to see if any of them caused an error

    Have you made sure that you are getting the correct voltages at the ADC? You should be able to measure the voltages at the nodes circled below and get AVDD = 5V, DVDD = 3.3V, HVDD = 15V, HVSS = -15V (all with respect to GND)

    If you are seeing all of the correct voltages at these pins, I would then see if you are getting pulses on the DRDY pin. The START pin is pulled high so the ADC should be converting if it is powered correctly. You can look at the DRDY pin with a logic analyzer or a scope to see if it is pulsing at approximately the inverse of the default data rate (20 SPS, or ~50 ms). Below is an example of what my board looks like when it powers up (disregard the other channels). If you do not see this behavior, it is possible your ADC is being held in reset. Did you modify the pull-up resistors on the EVM (R35 to R38)?

    -Bryan

  • 0 in reply to Bryan Lizon86
    Prodigy 20 points

    While I was checking DRDY pin, I realized header that ties processor side and ADC side is not connected. Thank you for your help. Now I am reading registers correctly in GUI.

  • 0 in reply to Rumeysa Dogan
    TI__Mastermind 37915 points

    Hi Rumeysa Dogan,

    Thank you for your update. This thread will be closed as the issue has been fixed.

    BR,

    Dale