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Original question:

TDC7201-ZAX-EVM: TDC7200EVM (COMx) 端口问题

TDC7201-ZAX-EVM: About trigger signal

user6486541
Prodigy 60 points
Part Number: TDC7201-ZAX-EVM
Other Parts Discussed in Thread: TDC7201

I installed the GUI software, inserted TDC7201 module into MSP430 module, and got the result of read all no errors under DEBUG，as shown in the figure. However, when I access the start and stop signals as required, the GRAPH interface does not respond. Then I used an oscilloscope to test the DTG_ Trig (tp9), found that there is no trigger signal output. So I now suspect that the TDC7201 EVM module did not successfully communicate with the GUI. What is the best way to solve this problem. thank you!

  • 0
    TI__Expert 3450 points

    Hi,

    To probe TRIGG1, use TP3 and to probe TRIGG2, use TP6. DTG_TRIG is not connected to the TRIGGx pins.

    If you probe TP3 do you see TRIGG1 as expected? What is your device configuration and test setup?

    The user guide provides a guide to evaluating the device and we recommend a similar type of test for first time evaluation. 

    I also recommend trying the TOF_ONE_SHOT tab to take one measurement at a time, on the EVM, probe START, STOP, TRIGGx, and INTBx. 

    Regards,

    Gabriel

    P.S. There is an issue with the embedded images, if the "Insert Media" button does not work, then trying a different web browser may solve it.  

  • 0 in reply to Gabriel Lake1
    Prodigy 60 points

    Dear,

    In the case of inputting the corresponding start and stop signals according to section 5 of the user's guide, I detected TP3 and TP6, and got a high level of about 3.4V. I determined that TDC1 was set on my GUI software. At the same time, I also detected DOUT1 (PIN14 of J2), and did not get the corresponding output signal. So I wonder if the TDC7201 chip is damaged. Is there a way to directly determine whether the chip is damaged? Thank you for your help!

    Regards,

    Zhangli

  • 0 in reply to user6486541
    TI__Expert 3450 points

    Zhangli,

    Glad that the TRIGG is working. DOUT1 is the SPI data out pin for TDC1, so your initial GUI communication debug check that you did should tell you if there is a communication problem. Did you test this for both TDC1 and TDC2?

    Reading the device registers while a measurement is occurring may disrupt the measurement and is not a recommended. 

    If you have some more details or evidence related to a malfunction, I'll be happy to help you determine the next steps. 

    Regards,

    Gabriel

  • 0 in reply to Gabriel Lake1
    Prodigy 60 points

    Hi,

    It was careless of me.

    It turned out that my previous problem was that my signal generator output default was "High Z" mode, and this module should use "50 ohm" load mode to work properly.

    Thank you for your help! Now, I can use this GUI software normally. 

    Regards,

    Zhangli