Forum Discussion

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

signal tap with USB blaster II

i have just bought a USB blaster II to upgrade the Altera / TerASIC USB blaster that i have been using ( all off the back of a dodgy USB hub it transpires ) if i use the old USB blaster as i ha...
CPata's avatar
CPata
Icon for New Contributor rankNew Contributor
6 years ago

Try to reduce the Jtag Clock from the default 24MHz for USB Blaster II to 16MHz or even 6MHz. This solved my issues with SignalTap and USB Blaster II.

To change the frequency open a Comand Prompt in Windows or a shell in Linux and go to the path or jour Quatus instalation at /quartus/bin where you can find the jtagconfig.

Than type: jtagconfig to see which number is the USB Blaster II.

Type again: jtagconfig --setparam <Nr.> JtagClock 16M