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Altera_Forum's avatar
Altera_Forum
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15 years ago

A strange JTAG configuration problem

I worked with FPGA for years but this time there's a really interesting problem comes to me: My board can be configured successfully through JTAG only at the very first time after my PC restart...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

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So if I understand right, after you configure the board you can run jtagconfig but you can't do another sof download? That's quite odd.

What does `netstat -ano | grep 1309` give you? I think this command puts the process number on the right hand side of the result. Are there any processes with established connections to jtagserver? If so then what are they?

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Yes, this is an odd problem. I can use JTAG to configure the board only once, and if I want to use JTAG to configure the board again, I have to restart my computer. Even log-off does not work. I changed to use another computer with windows7 32-bit, same phenomena.

I'm quite not familar with the windows processes stuff. Now I'm going to use PROM to configure the FPGA, if PROM works then I'll forget the JTAG.