USB Blaster has stopped working

Question

I am running Quartus 16.1 standard on Windows 10, and have been debugging my firmware with SignalTap II connected through the USB-Blaster. This has worked fine up until last night when it could no longer find the device. I've tried different boards, I've tried a different USB blaster. Nothing works. If I go to the programming tool and debug the JTAG chain it shows the expected device (Cyclone V SX) and an unknown device. It seems to be misreading the SOC? What could have changed? I've tried installing v20.1 but that USB Blaster driver won't install.

Any clues?

nuraiman_m_intel · Answer

Hi,Thank you for contacting Intel community.That might be due to issue with USB Blaster. Kindly follow the workaround in KDB below (it is also applicable for USB Blaster):https://www.intel.com/content/altera-www/global/en_us/index/support/support-resources/knowledge-base/tools/2021/why-does-the-intel--fpga-download-cable-ii-driver-installation-f.htmlThanks.Regards,Aiman

nuraiman_m_intel · Answer

We do not receive any response from you to the previous answer that I have provided. This thread will be transitioned to community support. If you have a new question, feel free to open a new thread to get the support from Intel experts. Otherwise, the community users will continue to help you on this thread. Thank you

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USB Blaster has stopped working

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