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EK-TM4C123GXL: How to access PA0 and PA1 pins for GPIO purposes?

balaji sankar
Prodigy 160 points
Part Number: EK-TM4C123GXL
Other Parts Discussed in Thread: ENERGIA

Hi,

I need to access PA0 and PA1 pins of the eval board for GPIO purposes. However I could not find the pins PA0, PA1, PD4 and PD5 on the evaluation board.

In the Energia diagram i have attached, below these 4 pins are grouped together. It also says these pins form the UART communication pins.

1) Does it mean I cannot use them on the launch pad?

2) If I can use them for GPIO purposes, are they broken out on the launchpad?

Thanks

BS

  • 0
    TI__Guru*** 135355 points

    Hello Balaji,

    You could try and access those pins on the TXD and RXD through holes between the device and emulator, but the pins will still be connected to the emulator which is configured as a UART interface. You won't be able to fully separate PA0/PA1 from the emulator UART channel.

  • 0
    Prodigy 160 points

    Hi,

    I could find the answer in Valvano's notes. Basically I cannot use

    PA0, PA1  (used for serial port communication with PC)

    PD4,PD5 (USB connection to PC)

    PC0,1,2,3 (Debugger connection)

    Thanks.