<xobs>
Many JTAG boxes have voltage conversion, if the PCB is running at a different voltage. For example, many modern Xilinx parts run at 1.8V, which will need an adapter.
<xobs>
But if VDD is 3.3V (ish) on the device you want to debug, then yes you can use openocd to bit-bang JTAG (or SWD). It's what we do with Tomu, and it's what we do (with a level shifter) for NeTV2 and Betrusted.
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<CarlFK>
xobs: given pi's are popular, I was wondering if it could be used 'generally' and sounds like no, or "it depends" and if no one knows, then no.
<xobs>
I always use them in the factory to program my boards, because they're cheap and most chips I work on are 3.3V. Most hobbyist projects are also 3.3V. 1.8V stuff is common in industry, but for now hobbyist projects will be safe using a pi.
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<somlo>
_florent_: should I be able to use any fat fs (particularly the more typical fat32) with sdcard and the litex bios now ?
<somlo>
guess I'll format a sdcard with fat32 and try, see what happens :)
<CarlFK>
have a fire extinguisher handy
<npcomp>
Further readins seems to suggest that the CLE-215 is _exactly_ the nitefury?
<somlo>
_florent_: building the bios `--with-sdcard` is broken right now -- undefined symbols such as `disk_status`, `disk_read`, etc. that are only currently provided in `spisdcard.c`, and not in `sdcard.c`
<zyp>
npcomp, my understanding too
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<npcomp>
Realizing I am new to this type of development, I was considering what neat things might be available with this type of dynamic pci device. One of the ideas I had was having the pci device offer an option rom, like a network card.
<CarlFK>
npcomp: friend works for www.m-cubed.com - they take used servers that have been "tweaked" and puts them back to OEM stock because that is easier to sell. ...
<CarlFK>
<CarlFK>
one of the tasks is "hacking" the current bios eprom whatever and getting it flashed? back to stock
<CarlFK>
maybe a pci card that halts the boot/post/whatever process and gives you a busybox prompt
<CarlFK>
netv2 has hdmi out and eathernet.
<_florent_>
somlo: sorry i haven't adapted the litesdcard code yet, FatFs has only been tested with spisdcard, i was planning to also add litesdcard support next week
<somlo>
_florent_: ok, no worries, I still have the last nexys4ddr bitstream from before that change (built for sdcard), so I'll use that for testing with 64-bit kernel patches
<somlo>
(and I can check out earlier commits, if push comes to shove :)
<somlo>
as long as it's on your radar, it's not a huge emergency or anything