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ramdamari's avatar
ramdamari
Icon for New Contributor rankNew Contributor
3 years ago
Solved

USB Blaster is recnized on wondows but not on Quartus

Hi all I am using USB altera with windows 10 and quartus 19. the usb device is reconized and working well as long it is the only usb device connected. When I attach a USB Hub it is steal recognized...
  • FvM's avatar
    FvM
    3 years ago

    Hi Rami,

    the only case where I regularly experience "diasppearance" of USB Blaster is when other FTDI USB FT232 or FT245 instances are connected to the computer, e.g. a FTDI USB-to-serial bridge. Have you other devices connected to the said USB hub?

    As far as I'm aware of, the FTDI problem exists since many years and has never been solved. My solution is to switch to a different USB-to-serial bridge or a different FPGA adapter if both are needed in a test setup.

    Regards
    Frank


tanabeh's avatar
tanabeh
Icon for New Contributor rankNew Contributor
3 years ago

I had encountered the same issue.
I encountered this issue just when I updated to Windows 10 22H2 and connected to UART-USB converter cable to debug MCU on the target system with MAX10 FPGA (10M50) on the same day.
Curiously Programmer.exe can always recognize USB Blaster after PC booted, but beyond second time Programmer cannot.
At first I suspect this issue was happened due to mismatch between Windows update and driver software or Quartus Programmer because Windows could detect USB Blaster but Programmer couldn't.
So updating Quartus software upto-date and re-installing USB driver software, but not helped.
Today I read this thread and check UART-USB converter, found the converter is FTDI chip.
With disconnecting UART-USB converter cable, USB Blaster became to be detected, thanks.