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Altera_Forum
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16 years ago

HOWTO: Setting up the USB blaster on Ubuntu 9.04 (Jaunty Jackalope)

edit: as of quartus ii 11.0, altera finally supports /dev/bus/usb out-of-the-box and does not rely on usbfs. the original version of this post described how to "fake" usbfs support in ubuntu, but thi...
Altera_Forum's avatar
Altera_Forum
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15 years ago

I was having a problem where nios2-download or something would freeze and after I killed it nothing would work with JTAG anymore until I rebooted. I was getting these errors: 

$ nios2-configure-sof /data/my.sof
Error: Can't scan JTAG chain. Error code 89.
$ jtagconfig                                              
1) USB_Blaster 
  Unable to lock chain (Insufficient port permissions)
Turns out jtagd was getting respawned as my user. This solves that problem: 

killall jtagd
sudo /opt/altera/quartus/bin/jtagd