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Message
From: rob.teel@u...<rob.teel@u...>
Date: Tue Feb 15 20:46:17 CET 2005
Subject: [openrisc] Newbie Questions
Hi Jake,Let me know what you come up with. I am kind of in the same situation
as you. I would like to find something for under $200 bucks to get
started with, but something with a network interface.
So far I have had no success finding anything. If you do though,
please post!
Thanks,
Rob
----- Original Message -----
From: Jake Brownson<jbrownson@g...>
To:
Date: Mon Feb 7 00:12:39 CET 2005
Subject: [openrisc] Newbie Questions
> Hello all, I hope I'm not asking questions that have been asked and
> answered 100 times before, and if I am please just point me to the
> information I missed. I'm going to lay out what I think I have
> figured
> out so far, and am asking for any corrections/advise.
> I am a 3rd year hardware/software student at Oregon Institute of
> Technology looking for an extracurricular project to work on. In my
> microprocessors class we are making a board to use a 8086 processor
> and attach memory and I/O devices, so I thought I'd try making a
> similar board on my own with a different processor, and maybe some
> more exciting devices. I started researching PowerPC and ARM when I
> happened upon OpenCores, and OpenRISC. As I love the concept of
> open
> source software I am very attracted to the notion of a 100% open
> system using OpenRISC and Linux.
> I see the link in the News items on the item dated 18-Mar-2004 to a
> tutorial, but I believe the link is broken as I do not find any
> mention of a tutorial of any type, or OpenRISC on the page, but a
> quick Google found the link:
>
> http://emsys.denayer.wenk.be/?project=empro&page=news&id=13.
> I am trying to figure out what hardware I would need to get
> started.
> Development Board:
> It would be really fun to build a development board from scratch,
> but
> 1. I can't seem to find anyplace that will simply sell you a
> CPLD/FPGA
> by itself aside from our school bookstore (which doesn't sell very
> big
> ones) 2. I'm pretty sure that the packages CPLD/FPGA's large enough
> to
> hold OpenRISC are available in would require PCBs (which I'm not
> sure
> I want to get into for this) and 3. I'm really not very sure what
> kinds of high frequency issues I would run into as in class we have
> only been dealing w/ 16MHz so far.
> So I imagine it would be best to get a development board. It seems
> from like what I've been able to find Xilinx boards are less
> expensive. Any recommendations on relatively inexpensive
> development
> boards?
> Here is one I'm looking at that should work great, but is $200
> http://www.xess.com/prod035.php3
> it has 1,000,000 gates with a XC3S1000 FPGA
> There are smaller versions also
> $149 200,000 gates with an XC2S200 FPGA -
> http://www.xess.com/prod034.php3
> $79 100,000 gates with a SpartanII FPGA -
> http://www.xess.com/prod026.php3
> $59 50,000 gates with a SpartanII FPGA -
> http://www.xess.com/prod027.php3
> Here is one that I think might fit (I'm going to try to compile for
> it) for $100
>
>
http://www.xilinx.com/xlnx/xebiz/productview.jsp?sGlobalNavPick=PURCHASE&sSecondaryNavPick=&category=-1210689&iLanguageID=1&category=/Xilinx+Products/Design+Resources/Design+Starter+Kits/Spartan+Starter+Kit
> it uses a Xilinx Spartan-3 200,000 gate Platform FPGA
> XC3S200-4FT256C
> Here is one using a CPLD which I don't think would fit (I'm trying
> to
> compile for it as we speak) but is $50
> http://www.xilinx.com/xlnx/xil_prodcat_product.jsp?title=design_kit
> it uses a XC2C256-7TQ144 CoolRunner-II CPLD and XC9572XL-10VQ44
> CPLD
> FPGA vs CPLD:
> It seems like CPLD boards are significantly less expensive than
> FPGA
> boards, but there would be a (rather large) limit on the number of
> times it could be reprogrammed. I understand that CPLDs are also
> faster than FPGAs. However while I see several references to using
> FPGA's with OpenRISC I haven't seen any for CPLD's. Why? I have
> been
> trying to compile OpenRISC for several different chips on both
> Altera's and Xilinx's software to see how well it fits, but it is
> going very slowly.
> Well I hope that all made sense, and I thank you in advance for any
> advise you could give, and I thank those of you who have worked on
> OpenRISC for the great work you have done.
> ~Jake B
>
>
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