Tag Archives: FT232H

FPGA – Conflicting FTDI Devices in Quartus

Recently I started using an FTDI FT232H in FT245 synchronous FIFO mode with an Intel MAX10 FPGA. I am using an FT232R based USB Blaster (Not a USB Blaster II, this is an older Altera USB Blaster, Terasic USB Blaster or another clone). Unfortunately when Quartus looks for programming devices it fails if it sees the FT232H first and the FT232H is in use by another program.

Hopefully this helps someone out as I see forum posts on the internet asking about this problem dating back to 2005 and past fixes do not seem to work in Windows 10 anymore.

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