It is possible to run code on a Tiva C Series device that causes the device to lose JTAG communication. The two most common causes are:
If you accidentally do either of these things, you can restore communication with your target device by running the Debug Port Unlock utility in LMFlash Programmer as shown below. For Tiva devices, select the Fury, DustDevil and Blizzard option
On TM4C129x devices, the MAC address is erased by the Debug Port Unlock utility, so be sure to write down the number before running the utility.
In reply to Rohit Deshpande:
You have to Power up the board with Reset button pressed.
Rohit Deshpande//SYSCTL_RSCLKCFG_R |= 0x13300003; //SYSCTL_PLLFREQ0_R |= 0X800060; //SYSCTL_PLLFREQ1_R |= 0X04;
And let it be now recorded that DRM method for coding is not suggested but TivaWare API's are the correct coding method to follow.
In reply to Amit Ashara:
Hi Amit,when using this tool with selecting the Fury, DustDevil and Blizzard option.It will revert JTAG bits to work with communication Debugger with Erasing the Code in the flash (Tiva will have no code on it here !)Is this right ?Regards,
In reply to ibrahem mostafa:
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