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I have checked out the schematic of the header and it turned out there were 12V power supply pins aligned right next to the normal I/O pins.
Obviously I have touched this pin with some normal pins and it have destroyed the I/O pins.
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Don't feel bad. I had a similar problem in the past; when probing a switch-mode power supply circuit with a scope, I shorted the 12V input power to the enable signal, and that enable signal was driven by a MAX II CPLD. The CPLD was destroyed, but luckily it was in a TQFP package, so I could just replace it.
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But luckily enough, I could still program the FPGA through JTAG. And I found a solution by substituting the former used pins with others.
But anyhow, some part of the development kit seems broken, with the error LED still flashing.
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I'm glad to hear your kit can still be used.
Cheers,
Dave
Honored Contributor
