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Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
18 years ago

USB Blaster driver conflict with other FTDI kit

Hi, I am using a USB blaster (Terasic) and on the same system I need to use two Asix Presto programmers that use the same FTDI device and (apparently) drivers. The Presto devices load up and...
SparkyNZ's avatar
SparkyNZ
Icon for Contributor rankContributor
5 years ago

I now have the same problem. I have been using Quartus 14 without problem for quite some time. This morning I upgraded to 20.x and now I have the same problem.

I have to shut Putty down in order to download to my FPGA. What a pain.

Looks like I'm going to need a second PC to run Putty..

avib's avatar
avib
Icon for Occasional Contributor rankOccasional Contributor
5 years ago

I'm also having the same problem of not being able to use the USB to serial together with the USB Blaster.

There is a way to workaround Programming by disconnecting the USB to serial and re-attaching it after the programming was completed, but there is no way to use SignalTap since I need the serial port connected during the debugging...

I've tried many Quartus driver versions, and the latest USB to serial driver, but it still doesn't work.