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Altera_Forum's avatar
Altera_Forum
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11 years ago

Signaltap retrieve data .... after having plugged JTAG

is it possible to plug the jtag (usb blaster or other) and retrieve captured data (aquire data a postiori) with signaltap? I mean : Program a FPGA with SignalTap, Let the board functio...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
10 years ago

Why not just leave the USB-Blaster plugged into the board? That way the USB-Blaster is not "hot-plugged" into the JTAG header while your board is powered.

You could leave the USB-Blaster plugged into a PC, so that the cable electronics is also powered, but that is not required. You could just plug the USB-Blaster USB connector into your PC after the board has been powered.

SignalTap II has a power-on trigger configuration. This allows the FPGA instance of SignalTap II to trigger, and then you can retrieve the trace at a later time. I have used this to capture an event that would only occur every few days.

Cheers,

Dave