RM57L843: The XDS110 DEBUG PROBE can't work suddenly

Hi RuMing,

The XDS110 debug probe does not require a separate license for its use with the Code Composer Studio (CCS) IDE. The debugger DevPack, which is based on the XDS110 emulator, does unlock a free license to CCS.

I guess that the firmware of your xds110 was erased inadvertently. Please read the XDS110SupportReadMe.pdf  in C:\ti\ccs1280\ccs\ccs_base\common\uscif\xds110 regarding updating the firmware.

(+) Can't find XDS110-U device with CCS or xdsdfu -e - Code Composer Studio forum - Code Composer Studio︎ - TI E2E support forums

Hi RuMing,

Have to tried to reprogram the firmware with another working JTAG emulator? The emulator should have a small JTAG header on PCB (open the emulator box) for programming TM4C129 or FT23x. 

Hi QJ,

Because we do not have a JTAG connector on hand to connect the emulator and computer, we use "Recovering a Bricked XDS110 without JTAG" to burn bin files for the simulator.

But when we run the burn command, the following error occurs. Can you help check if the above wiring meets the requirements? Thanks so much!

Because the firmware is erased, the CPU can not find the USB device. 

Another way is to use USB DFU. TM4C129 is set to boot from USB DFU. You can transfer a binary file to TM4C129.

xdsdfu -m
xdsdfu -b boot_loader.bin -r
xdsdfu -e
xdsdfu -m
xdsdfu -f firmware_3.0.0.11.bin -r

Hi QJ,

I can't run above commands because "device was not found". How to "use USB DFU"? I have tried to achieve "Recovering a Bricked XDS110 without JTAG" by following steps, but failed.

Can you please check if there is resistor on pin 59 (RBIAS) of TM4C129 device?

ETH#03 RBIAS Resistor Required Independent of the use of On-Chip Ethernet PHY

Tiva C Series TM4C129x Microcontrollers Silicon Revisions 1, 2, and 3 (Rev. G)

Yes. There is indeed a resistor on pin 59, and the resistance value is 4.86K.

Thank you for checking. Can you replace it with a 4.7kohm resistor described in the workaround in Errata? 

Hi QJ,

Can you tell us what's the difference between 4.86K and 4.7K?

Hi Ruming,

This is the recommended workaround in device errata to solve the boot issue. It may be related to current on Rbias, I don't know much about TM4C129.

Hi QJ,

Maybe we can try to use JTAG connection to replace this method. How to get the JTAG connector?

I don't what kind of connector (10-pin, 14-pin, or 20-pin) is populated on the PCB for TM4C129 device. I can use short wires (TDI, TDO, TMS, GND etc) to connect the working JTAG emulator and TM4C129 JTAG header.

Hi QJ,

We are unable to make these two simulators work anymore. Do you have any good suggestion？

Hi Shen, unfortunately QJ is out of office until the week of June 30.  I've discussed this issue with a couple other engineers and they don't have anything further to contribute.