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TM4C129DNCPDT: TM4C129DNCPDT:

Surya S
Prodigy 50 points
Part Number: TM4C129DNCPDT
Other Parts Discussed in Thread: SEGGER, EK-TM4C1294XL

Tool/software:

Hello ,

Greeting of the day.

TM4c129DNCPDT : PC0- SWCLK pin unlocked. Because of that unable to load the binary. 

Used tool: Uniflasher software  / segger j- link emulator

How to lock again using the above setup. So that I can flash the code again.

Please confirm  the following microcontroller pin PC0 used as SWCLK (JTAG)and Normal GPIO functionality for the same application.

If possible means please some examples for the same. 

  • 0
    TI__Guru**** 191736 points

    Hi,

    Surya S said:
    PC0- SWCLK pin unlocked. Because of that unable to load the binary.

    I think you mean just the opposite, right? PC[3:0] are JTAG pins by default. In their default configuration, you are able to debug/program the device through the JTAG interface. It is when you repurpose these pins for GPIO then the debugger can no longer connect the the device. 

    Refer to this example at C:\ti\TivaWare_C_Series-2.2.0.295_org\examples\boards\ek-tm4c1294xl\gpio_jtag. This example changes the the PC[3:0] pins between JTAG and GPIO modes.