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TDC1000-TDC7200EVM: Using impedance match and HV boost

Part Number: TDC1000-TDC7200EVM

Hello,

I am editing the source code for the TDC1000-7200 EVM to work with my impedance matching circuit and BSTEVM boost board. I can see that they are using the same GPIO pin. Could I get some directives of which pin I could use and what parts of code to edit? 

Thanks!

Regards,
Thibault

  • Hi Thibault,

    There are several unused GPIO pins still available on the same header. It would be easiest to change the single GPIO used for the impedance matching switch control to another open GPIO. GPIO 3, 4, or 6 should be free for you to use.

    Regards,
  • Scott Cummins said:
    Hi Thibault,

    There are several unused GPIO pins still available on the same header. It would be easiest to change the single GPIO used for the impedance matching switch control to another open GPIO. GPIO 3, 4, or 6 should be free for you to use.

    Regards,

    Hi Scott,

    I tried with GPIO 6 (was not defined as default) which did not work at all for some reason, I used the following pin definition:

    #define TI_TDC1000_GPIO6_PxOUT       P5OUT
    #define TI_TDC1000_GPIO6_PxDIR       P5DIR 
    #define TI_TDC1000_GPIO6_PIN         BIT0

    Is it wrong?

    I use GPIO 3 and 4 for UART so I was only left with GPIO 2 which I got working now, but I saw that it was used for AMP_en but I don't know what it is for?