<div dir="ltr">I saw that. I can't wait to start looking at it. If I get everything working, can I post directions to a wiki?</div><div class="gmail_extra"><br><br><div class="gmail_quote">On Wed, Apr 3, 2013 at 9:26 AM, Gedare Bloom <span dir="ltr"><<a href="mailto:gedare@rtems.org" target="_blank">gedare@rtems.org</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Joel has a public branch with some initial work on microblaze. I'm not<br>
sure about its status or when it might get merged, but that would be<br>
the place to start I suppose.<br>
<br>
<a href="http://git.rtems.org/joel/rtems.git/log/?h=microblaze" target="_blank">http://git.rtems.org/joel/rtems.git/log/?h=microblaze</a><br>
<br>
-Gedare<br>
<div><div class="h5"><br>
On Wed, Apr 3, 2013 at 8:34 AM, Mathew Benson <<a href="mailto:mathew.benson@gmail.com">mathew.benson@gmail.com</a>> wrote:<br>
> I have been evaluating inexpensive FPGA based boards to eventually port<br>
> RTEMS. I have the XuLA2 (<a href="http://www.xess.com/prods/prod055.php" target="_blank">http://www.xess.com/prods/prod055.php</a>), and<br>
> started with the OpenRISC. XuLA2 has a Spartan 6 LX25 and 32 MB of SDRAM<br>
> and costs $119. I got the OpenRISC core loaded but switched to Microblaze<br>
> before I tried running code on it. With the minimum options, OpenRISC takes<br>
> up about 90% of the area and looks like a jumbled mess. Microblaze takes up<br>
> 25% and looks clean. I can't get the OpenRISC to pass timing tests over 50<br>
> MHz. Microblaze goes up to 100 MHz. But, the Xilinx tools don't support<br>
> the XuLA2 SDRAM. I will have to eventually find or write my own SDRAM<br>
> controller. The Xilinx software development tools don't support the XuLA2<br>
> loader, so I purchased a Xilinx JTAG. Now I'm having problems getting the<br>
> XuLA2 to work with JTAG, but I finally got an email from the manufacturer.<br>
><br>
> I just purchased a beta Pipistrello board<br>
> (<a href="http://pipistrello.saanlima.com/index.php?title=Welcome_to_Pipistrello" target="_blank">http://pipistrello.saanlima.com/index.php?title=Welcome_to_Pipistrello</a>)<br>
> which should arrive Friday. They will be available in multiple sizes with<br>
> the largest being the Spartan 6 LX45 for $149. It has 64 MB of DDR SDRAM,<br>
> which is supported by the Xilinx tools. It also has a USB loader, though<br>
> the beta board does not. It has more pins but is a larger board than the<br>
> XuLA2. He expects to make production boards available in the next couple<br>
> weeks. What I really find interesting is that he already has Linux running<br>
> on a Microblaze core on it and has posted files and instructions on his<br>
> website. He even has Arduino ported with the Arduino SDK and IDE ported and<br>
> available on his site. The LX45 is almost twice the size of the LX25, and I<br>
> believe the Pipistrello uses the faster -3 grade FPGA. I've read people<br>
> have even fit software based radios into the LX45. Lastly, I've been<br>
> getting better support on Pipistrello.<br>
><br>
> I like the XuLA2 because of the smaller physical size, low cost, and the<br>
> fact it's breadboardable, but the Pipistrello is better in every other<br>
> aspect. Once I get the Pipistrello, I want to start porting RTEMS to the<br>
> Microblaze.<br>
><br>
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</blockquote></div><br></div>