Can't Access JTAG Chain Programmer Failed

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Have you tried doing an Auto Detect in the Programmer?

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Yes, it auto-detects the 5CSEMA4U23 which is correct, and the same as what I compiled the project with. However after the device fails to program, if I try to auto-detect again it gives the error in a pop-up window:

Unable to scan device chain. Can't scan JTAG chain. Do you want to open the JTAG Chain Debugger to troubleshoot the JTAG chain?

Which is when it gives those errors about the tdi, tck, and tms connections shown in the previous post screenshots.

When I power cycle the board it is again able to auto-detect and the JTAG test comes back clean.

Hi Andrew,

Refer to the reference manual link below - Page 20 & 26

https://www.altera.com/content/dam/altera-www/global/en_us/pdfs/literature/manual/rm_cv_soc_dev_board.pdf

Refer to the link below for 'ERROR: Cant access JTAG chain'

https://www.altera.com/support/support-resources/knowledge-base/solutions/rd03312011_647.html

Refer to the link below for 'ERROR: Can’t configure device.

https://www.altera.com/support/support-resources/knowledge-base/solutions/rd04202010_43.html

For more info, you can go through the training below on JTAG chain integrity issues

https://www.altera.com/support/training/course/odjtag1110.html

Thanks.

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Hi Andrew,

Refer to the reference manual link below - Page 20 & 26

https://www.altera.com/content/dam/altera-www/global/en_us/pdfs/literature/manual/rm_cv_soc_dev_board.pdf

Refer to the link below for 'ERROR: Cant access JTAG chain'

https://www.altera.com/support/support-resources/knowledge-base/solutions/rd03312011_647.html

Refer to the link below for 'ERROR: Can’t configure device.

https://www.altera.com/support/support-resources/knowledge-base/solutions/rd04202010_43.html

For more info, you can go through the training below on JTAG chain integrity issues

https://www.altera.com/support/training/course/odjtag1110.html

Thanks.

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Hi Calvin,

Thanks for the information, but correct me if I'm wrong but these resources seem more concerned with something being wrong with the physical board? I haven't done the online course though yet. However, When using another project I can program and run the board fine. And I tried running the current project on a different board and it still fails. I'm not sure why but after attempting to program the board. The SOCVHPS disappears from the device chain. And only the 5CSEMA4U23 remains. So when it tries to access the JTAG chain it expects two devices but only finds one.