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Altera_Forum
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7 years ago

Can't scan JTAG chain - DE0-CV / Win 10

Hello all, I have purchased my first FPGA recently it is a DE0-CV. I cannot get my computer to access it via JTAG. I am using Windows 10. - I have tried to use the DE0-CV Control Panel s...
Altera_Forum's avatar
Altera_Forum
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7 years ago

I have solved my issue. I noticed that sometimes the JTAG debugger would find 10-90 devices after moving the dev board. I knew that it was trying to work but there was an intermittent issue. After examining the board I noticed what looked like trash between two pins on the USB Blaster (MAX II chip). I blew on my board and slapped it gently and Programmer found my device for the first time. After I realized that that was the issue I used my soldering iron to (painstakingly) melt the waste solder that was hung between the two pins.

TL;DR - there was lose solder stuck between two pins of the MAX II CPLD USB Blaster. It would wiggle around but not pull out between the pins. i have included pictures of what it looked like.

Thank you guys for trying to help. :)