Argh! Need help debugging Xilinx .xsvf Player (XAPP058)

Bob · 2008-05-02T02:26:06+00:00

I'm trying to get the .xsvf player in XAPP058 to work, but I haven'tbeen able to do so. I have been able to do port.c, and I see signalsthat seem quite reasonable. But the FPGA DONE bit never getsasserted.If I enable debugging output, and "play" a simple GetIdCode .xsvffile, I see the chip (Xilinx Spartan-3) responding with the correctvalue (0x01434093), so it seems things are more or less okay.I can play my .xsvf files (which are generated by the svf2xsvf utilityfrom the app note, downloaded yesterday) in iMPACT, and they work justfine.When I Googled it, I found one thread titled "Configuration via JTAGusing an Embedded Controller" from December, but there was notresolution. The one responder suggested that if DONE doesn't go high,then there's a problem; they also guessed that a "post-amble" ismissing, and to re-read the documentation, but I'm not sure whatdocumentation is being referred to! I haven't been able to find anymention of it in XAPP058 nor XAPP503!Okay, but I'm not sure where to look for this! I've played the fileusing iMPACT, and it works - so it would seem iMPACT adds such a "post-amble" automagically? How do I get this into my svf (and hence, xsvf)files?Thanks!-Bob

May 02, 2008 21 Replies

Rate this thread:

Bob 18 years ago

Thanks!

that it will...

Without fully understanding things, I'm guessing so too, especially if my suspicion that the Spartan-3 is related to the Virtex-II in some important way; that sounds familiar now. Suppose I could look it up, but I'm too busy now making up for lost time!

Anyway, I was going to say I don't have time to try, but since you've been so good to me, I figure I could return the favor. Yes, the second method does indeed work! Seems to suggest there are two separate uses of this function, one which the FPGA requires pulses for whatever reason, and the other just time (erasing flash?)...

Take care, Bob

Vote

MM 18 years ago

Thanks Bob. There was no need to return the favor, but I think this was time not wasted :) And, yes, Spartan-3 is based on the Virtex-II architecture.

/Mikhail

Vote

Join the Discussion

Have something to add? Share your thoughts — no account required.

Didn't find your answer?

Ask the community — no account required