Forum Discussion
Updated Blaster Not Working
- 7 years ago
The cause of the problem was found. It was the frequency of the USB Blaster.
The Quartus II software comes with drivers for the USB Blaster, but does not allow for changing the communication speed of the Blaster.
The Quartus Prime software does. The default value of the speed is 24 MHz, and the devices we were trying to program worked at a lower frequency. Once we changed the frequency of the USB Blaster to match the devices, it worked fine.
Do you have any other usb to serial cables plugged into your computer? Any other USB device that uses the same FTDI device that you find in the USB-Blaster II cable can cause Quartus problems, especially if you have software running that's using one of those devices. Unplug any other USB devices (that you don't need) from your system.
Cheers,
Alex