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TDC1000-TDC7200EVM: Time Response and measurement frequency

Jarle Horneland
Prodigy 80 points

Part Number: TDC1000-TDC7200EVM

Hi

I am wondering what the limitations is for the TDC1000-TDC7200EVM when it comes to the time-response/measurement-frequency.

The shortest TRIGGER UPDATE FREQ possible in the GUI is 100ms. Why is the the limit and is it possible to override it in any way?

I am also wondering how many Delta TOF measurements it performs within these 100ms. Is it just one or is it an average of many cycles?

Best regards

Jarle Horneland

  • 0
    TI__Mastermind 21685 points
    The MSP430 on the board supports only full speed USB which can have USB latencies of 5-10ms. So the GUI and firmware supported only 100ms as the lowest trigger frequency. The following e2e posting has some information on how user can modify firmware and experiment if they want to test it for faster trigger frequencies.

    e2e.ti.com/.../1935496

    The command/response protocol between the GUI and MSP430 firmware is explained in the link below.

    e2e.ti.com/.../1830990


    Also, detailed getting started instructions on the EVM firmware is available as part of the following link

    e2e.ti.com/.../520659


    Thanks,
    Vishy
  • 0 in reply to Vishy Viswanathan
    Prodigy 80 points
    Hello again
    I got the firmware up and running with IAR. And I can read data from the uart using Tera Term
    It runs ok with 20ms update freq, but when i use 10ms update freq I lose some data.
    Is it possible to get higher frequency by preventing the EVM from sending data to the Graph in the TI GUI, and just use the terminal program?
    If yes, How should i do this?
    Or is there any other way to run a faster update freq and still contain all data?

    Thank You!
    Jarle Horneland