CCS/CC3220MOD: The JTAG IR and DR scan-paths cannot circulate bits, they may be broken.

Xinrong

Prodigy 105 points

Part Number: CC3220MOD

Tool/software: Code Composer Studio

I connected the xsd100 to PC, and connected the PCB to xds110. I also connected the power supply to PCB with 4V.

The ccxml file has been setup as showed below. When I clicked ’test connection’ in CCS, an error occurred.

I also used multimeter to test pin_V3V3 of the JTAG on PCB, it showed 3.3V.

Do you know what the meaning of ‘ JTAG IR and DR scan-path cannot circulate bits’ ? And what should I do to solve this problem?

over 5 years ago

0 desouza over 5 years ago

TI__Guru**** 168783 points

Hi,

Thanks for such detailed post. The configurations in CCS look ok, as well as the connections.

The error code is shown at the Debugging JTAG document (search for the error code). This reference contains additional explanation and ideas to troubleshoot this.
software-dl.ti.com/.../ccs_debugging_jtag_connectivity_issues.html

Hope this helps,
Rafael

0 Xinrong over 5 years ago in reply to desouza

Prodigy 105 points

Dear Rafael,

Thanks for your reply.

Actually, I removed Pin 2 of JTAG ( you can see the second picture in my original question), then the connection succeeded.

But I still not very understand the reason why it can work without Pin 2; so could you explain this for me?

Best regards,

Xinrong

0 desouza over 5 years ago in reply to Xinrong

TI__Guru**** 168783 points

Xinrong,

Thanks for reporting the outcome of your setup and apologize for the delay.

Pin 2 of the connector is usually tied to the JTAG reset signal (TRST), which is non-existent on the CC3220 device. What may have happened is that you tied this signal to the device's nRESET pin 32, which could cause it to reset and cause problems during connection.

Regards,
Rafael

0 Xinrong over 5 years ago in reply to desouza

Prodigy 105 points

Rafael,

Thanks for your Answer.

Best regards,

Xinrong

Code Composer Studio™︎

Code Composer Studio forum

CCS/CC3220MOD: The JTAG IR and DR scan-paths cannot circulate bits, they may be broken.