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Could not find Cortex-M device in the JTAG chain. Tiva C LaunchPad

Abraxas

Question has been asked before but many years ago without any resolution that I could see. I have a TIVA Launchpad and I get the error Could not find Cortex-M device in the JTAG chain. Tiva C LaunchPad. My device has been programmed before and still has the usual beginner flash LEDs program on it. I've checked switch to Debug. Still no joy. Any ideas ?

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  • 0 Arm Employee Badge in reply to Ronan Synnott

    I don't know which TIVA Launchpad board you have. Please note that the on-board debug adapter can be programmed with different firmware. The video shows 'Stellaris ICDI', but many boards also have a 'TI XDS Debugger' or a 'CMSIS DAP' firmware programmed. Check where you get a connection and then you should see a JTAG/SWD identifier on the right-hand side of the 'Cortex-M Target Driver Setup' dialog. 

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  • 0 Arm Employee Badge in reply to Ronan Synnott

    I don't know which TIVA Launchpad board you have. Please note that the on-board debug adapter can be programmed with different firmware. The video shows 'Stellaris ICDI', but many boards also have a 'TI XDS Debugger' or a 'CMSIS DAP' firmware programmed. Check where you get a connection and then you should see a JTAG/SWD identifier on the right-hand side of the 'Cortex-M Target Driver Setup' dialog. 

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  • 0 in reply to Hans Schneebauer

    It is a EK-TM4C123GXL. I'm sorry Hans. I do not understand what you mean by "Check where you get a connection and then you should see a JTAG/SWD identifier on the right-hand side of the 'Cortex-M Target Driver Setup' dialog. "

    Here's another page from my Keil:

    Thank you so much, both of you for your continued help and patience.I'm a little foggy from some recent illness, so I'm not firing on all cylinders.