Occasional Contributor
Super Contributor⁹Hi,
as far as I'm aware of, there's a still unsolved incompatibility of Windows USB Blaster driver with standard FTDI FT232/FT245 driver.
If I can't avoid to have a device with standard FT232 driver in my development setup, I use a different Quartus compatible programming adapter, Intel FPGA Download Cable II, USB Blaster III or Arrow USB Programmer II. Alternatively use none-FT232 USB-to-serial adapter.
I believe it's possible to modify USB Blaster driver to make it work in presence of other FT232/FT245 driver, but apparently it wasn't yet done.
Regards Frank
