Forum Discussion

xingyunzhidi's avatar
xingyunzhidi
Icon for New Contributor rankNew Contributor
10 months ago
Solved

The issue of FPGA not detecting the JTAG chain

When I try to program the POF file, Quartus can detect the device but cannot detect the JTAG chain. The 'FPGA configuration successful' LED also turns off. At the same time, when using BTS, it shows ...
Configuration
  • lixy's avatar
    lixy
    10 months ago

    Hi xingyunzhidi,


    Thanks for test it out.

    As the configuration is ok when set to JTAG only, but failed when set to AVST, it is likely that the AVST configuration scheme could have something wrong. A few possible reasons below, you may check one by one.

    1- The bitstream in the FLASH is corrupted. If so, you need to erase the FLASH. (If you can not figure out how to erase the FLASH, Let me know which devkit you are using, then I can check the schematic. ) Did this issue happen after you tried to program a POF file to FLASH? If so, then there could be something wrong with this POF.

    2- The AVST master is not working properly. Normally there's another FPGA/CPLD works as the AVST master to program the target FPGA. You can check if the board has any LED to indicate this master CPLD is working. Or have you changed the image of this master FPGA/CPLD somehow?

    3- The FPGA AVST interface has something wrong.


    Best Regards,

    Xiaoyan


lixy's avatar
lixy
Icon for Contributor rankContributor
10 months ago

Hi xingyunzhidi,


Thanks for test it out.

As the configuration is ok when set to JTAG only, but failed when set to AVST, it is likely that the AVST configuration scheme could have something wrong. A few possible reasons below, you may check one by one.

1- The bitstream in the FLASH is corrupted. If so, you need to erase the FLASH. (If you can not figure out how to erase the FLASH, Let me know which devkit you are using, then I can check the schematic. ) Did this issue happen after you tried to program a POF file to FLASH? If so, then there could be something wrong with this POF.

2- The AVST master is not working properly. Normally there's another FPGA/CPLD works as the AVST master to program the target FPGA. You can check if the board has any LED to indicate this master CPLD is working. Or have you changed the image of this master FPGA/CPLD somehow?

3- The FPGA AVST interface has something wrong.


Best Regards,

Xiaoyan


xingyunzhidi's avatar
xingyunzhidi
Icon for New Contributor rankNew Contributor
10 months ago

The issue was resolved after I erased the flash. Thank you very much!