CCS/F28M36H33B2: GEL: Error while executing OnTargetConnect(): Evaluation canceled

Hi,

>>Cortex_M3_0: Trouble Reading Memory Block at 0x680428 on Page 0 of Length 0x4:

I can't precisely tell why the error is happening, but the address above is marked as "Reserved" in the device's memory map.

Therefore can you try a few things?

- Double-check your target configuration file set to the F28M36H33B2. Small differences between the devices may affect GEL functionality.

- Can you remove the GEL files from the configuration and see if it is possible to connect to the core? Check this reference for details. This may evidence problems with the GEL file itself. 

- The fact the OnTargetConnect procedure starts means the connection was established but the device may have gone awry during the process - perhaps being reset by an external agent such as a watchdog timer. Can you check the bootmode pins according to section 6.8.4 of the device datasheet to see if they match the information there?

- Perhaps an update to the C2000 Device support corrects an issue specific to this device. Can you go to menu Help → Check for Updates and see if there are any available updates?

Unfortunately I don't have the same device as you, but connecting to a blank F28M36P63C2 is successful. I am using CCSv7, however. 

Hope this helps,

Rafael

Thanks Rafael

I also suspected a GEL file problem, but I have tried all your suggestions and it still does not want to connect. However, we also had a Blackhawk USB560 Emulator lying around and when I connected that up, and only changed the Emulator in the Target Configuration file, everything was working fine! I am now able to connect and flash the device successfully with the USB560. I know my XDS510 is not faulty and I have also tested it with another XDS510 which also does not want to connect. I would still like to get the XDS510 working though. Why would the Blackhawk USB560 work but not the XDS510?

Hi,

Thank you for reporting back the details. I can't necessarily point to a specific root cause for this, but history shows that a few details that may be influencing your ability to connect are:
- Ground loops. The XDS510USB is USB powered, while the USB560 may or may not be (depends on your model). If both your PC and your target board do not have isolated power supplies, the XDS510USB may be closing a ground loop from the USB port of your PC all through the target board, while the USB560 may have some isolation between the USB and the JTAG. That or the power supply of your USB560 is diverting part of the ground loop current through its own power supply.
- Differences in design. The XDS510USB and the USB560 have different designs with different JTAG line drivers and, possibly, some isolation between the USB and the JTAG ports. The line drivers can also have marginal differences in strength which cause integrity issues in the JTAG communications.
- Differences in target board design. The same idea as above, but this time with the target board. Specific routing or pull ups/pull downs that can marginally affect the integrity of JTAG communications.

All in all, I would double-check the circuitry and compare with section 7.1 of the reference below:
processors.wiki.ti.com/.../XDS_Target_Connection_Guide

Hope this helps,
Rafael

Hi,

Thank you for reporting back your findings. Unfortunately I don't know what is this option as this is directly provided by Spectrum Digital. In any case, i am glad it worked for you.

Regards,
Rafael