The first roadblock is I'd like to keep my development system as close to debian squeeze as possible, and I have migen installed, but now it looks like I will have to make a mess to get python3-networx installed.
Any thoughts on this? Would it make sense to have a 'debian-squeeze-milkymist-ng' package repository so we can all work from a known state for development? On Sat, Jan 05, 2013 at 09:41:31AM +0100, S?bastien Bourdeauducq wrote: > Since that SDRAM part on that board might operate at up to 200MHz > (check which speed grade you have), I'd recommend you use > milkymist-ng and its memory controller (ASMIcon) with a 1:2 > frequency ratio, e.g. run the SoC at 83MHz and the SDRAM at 166MHz. > > http://www.winbond.com/NR/rdonlyres/16898431-2772-4CEA-8474-7E4AA855555F/0/W9825G6JH.pdf > https://github.com/milkymist/milkymist-ng > > You will basically need to: > * modify the PHY so that the data serialization ratio becomes 2 > (instead of currently 4 for DDR). > * adapt the clocking accordingly. > * check the timing and other ASMIcon parameters. You have 2 phases > and 32-bit data. > * modify the initialization sequence in the BIOS to send the SDR > (not DDR) sequence and set burst length to 2. > > S?bastien > > On 01/05/2013 06:22 AM, Troy Benjegerdes wrote: > >I've got an XESS Xula2 board ( http://www.xess.com/prods/prod055.php ) > >and eventually I'm planning on doing a ghetto resistor VGA DAC (like > >at > >http://devbisme.webfactional.com/blogs/devbisme/2011/06/02/simple-vga-interface-xula-fpga-board > > ) > > > >But first, I need to figure out how to convert from the current 32 > >bit SDRAM interface to the 16 bit interface on the board. There's > >even an SDRAM controller in vhdl > >https://github.com/xesscorp/XuLA2/blob/master/FPGA/XuLA_lib/SdramCntl.vhd > > > >So my question is: What's easier/better? Try to use the vhdl version, > >or switch the existing milkymist controller to 16 bit? What verilog file > >should I be looking in to make the changes? > > > > _______________________________________________ > http://lists.milkymist.org/listinfo.cgi/devel-milkymist.org > IRC: #milkymist@Freenode -- -------------------------------------------------------------------------- Troy Benjegerdes 'da hozer' [email protected] Somone asked my why I work on this free (http://www.fsf.org/philosophy/) software & hardware (http://q3u.be) stuff and not get a real job. Charles Shultz had the best answer: "Why do musicians compose symphonies and poets write poems? They do it because life wouldn't have any meaning for them if they didn't. That's why I draw cartoons. It's my life." -- Charles Shultz _______________________________________________ http://lists.milkymist.org/listinfo.cgi/devel-milkymist.org IRC: #milkymist@Freenode
