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Altera_Forum's avatar
Altera_Forum
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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...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
9 years ago

Thanks for confirming the issue. I'm not sure yet if generally occurs with recent Windows versions and newer USB Blaster drivers, or only under particular circumstances.

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I found I have to close the terminal program that is using the "other" FTDI device and can't start it again until the USB Blaster is active (e.g. DS-5 debugger is connected or programmer is programming), then both will run fine until Blaster is inactive.

Tedious but is works.

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Yes, I believe that has worked for me too. Considering that the USB Blaster reconnects in various situations (e.g. always after reconfiguring the FPGA, starting a different JTAG debug tool) the method is more a last resort than a solution.

Still hope there's an actual solution other than switching to USB Blaster 2 or possibly a Cypress based USB Blaster clone.

Regards,

Frank