On Mon, Nov 08, 2010 at 05:09:30PM -0500, DJ Delorie wrote: > > Just boot the FPGA from the processor. That's what I always do. > > When I have a processor, that is. The only overhead is the four > > GPIO pins attached to the FPGA JTAG, and those can be put to good > > use after booting as well. > > I used the SPI pins, just streamed the bitstream at full speed. The > RX board uses jtag, so I have to convert the bitstream to XSVF and > play it into the chip, but I don't have to include that code (or > bitstream) in any normal apps.
I always like the satisfaction of "seeing" the JTAG ID of the chip before blindly bit-banging a megabyte to a chip that might not really be there. I also use JTAG to access registers on the running chip; it works about as well as SPI in that regard. - Larry _______________________________________________ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user