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TDC7201: How to get Trig1, after config1

Suchan Hong
Prodigy 40 points
Part Number: TDC7201

Hi

I'm currently tying SPI communication on TDC7201-ZAX-EVM without Launch Pad.(MSP430).
And try to get Trig1 signal after config1 initialization.

According to the manual, Trig1 signal supposed to come up after config1 is initiated but it seems it's not working.

Can anybody help me out?

Thanks in advance.

  • 0
    TI__Expert 3450 points

    Hi Suchan,

    To clarify your question, in step 3, the START_MEAS bit is set in the TDC1_CONFIG1 register, but the TRIGG1 signal is not generated?

    If you try to take a measurement, what do you read from the TDC1_INT_STATUS register?

    Regards,

    Gabriel

  • 0 in reply to Gabriel Lake1
    Prodigy 40 points

    Hi Gabriel

    Thank you for your reply.

    1. To clarify your question, in step 3, the START_MEAS bit is set in the TDC1_CONFIG1 register, but the TRIGG1 signal is not generated?

    => Yes, that is correct. Also, I've set the config1 register value as "01h" as WRITE MODE. However, TRIGG1 signal is not generated.


    2. If you try to take a measurement, what do you read from the TDC1_INT_STATUS register?

    => Would it be necessary procedure as well? All I tried is to get TRIGG1 signal after giving value to CONFIG1.

    Thank you
    Regards,

    Suchan

  • 0 in reply to Suchan Hong
    TI__Expert 3450 points

    Suchan,

    Thanks for the clarification. 

    The cause or depth of the issue is unknown, so taking some steps to debug and scope the issue will be helpful. 

    I recommend doing a test similar to the evaluation test described in the EVM user's guide and monitoring the  TRIGG1 and INTB1 pins, then afterward read the values from the TDC1_INT_STATUS register. Make sure TP3 is used to probe TRIGG1. 

    Double checking your hardware setup for the test and your measurements is also a good idea with this type of error. 

    Regards,

    Gabriel