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Issues while connecting GSM in UART0 of TivaC series

Dinesh K M
Intellectual 380 points
Other Parts Discussed in Thread: TM4C129ENCPDT, EK-TM4C1294XL

Hi,

We are trying to connect GSM module to UART0 of Tiva C series micro controller but we faced some issues while communicating with GSM in debug mode using JTAG.

It shows some "Debug port error" and we can not proceed further. But this will work fine when we flashed the code instead of debugging. We are using the following environment for debugging.

Micro Controller : TM4C129ENCPDT

JTAG : EVK - TM4C1294XL

RTOS : TI RTOS

IDE : Code Composer Studio

We are facing this debug port issue while working with UART0 only. We have tested the other UART's like 6,7 etc and they are working fine.

So we suspect that UART0 is used for any debug purpose. Would you please help us to identify this issue?

Regards,

Dinesh

Regards,

Dinesh

  • 0
    TI__Guru**** 244380 points

    Hello Dinesh

    Did you check if the UART port configuration is happening correctly? The Debug Port Error is an issue on JTAG port and has got nothing to do with UART JTAG port. One thing you may want to check is how the UART TX and RX are connected from the EK-TM4C1294XL to your custom board.

    EDIT: A correction to the second mention of JTAG.


    Regards
    Amit

  • 0 in reply to Amit Ashara
    Intellectual 380 points
    Hi Amit,

    Thanks for the quick reply.
    Currently only JTAG lines like TDI, TDO etc are connected to custom board.

    Regards,
    Dinesh
  • 0 in reply to Dinesh K M
    TI__Guru**** 244380 points
    Hello Dinesh,

    Where exactly during the code execution when in debug mode does this happen?

    Regards
    Amit