Forget to cc mail-list. -Wei
-------- Forwarded Message --------
Subject: Re: [lowrisc-dev] FPGA Recommendation
Date: Fri, 9 Jun 2017 16:07:15 +0100
From: Wei Song <ws327(a)cam.ac.uk>
To: Tobias Strauch <tobias(a)cloudx.cc>
So here is a list of boards we support right now:
tagged-memory-v0.1: ZedBoard (obsolete)
untether-v0.2: Nexys4-DDR / KC705
debug-v0.3: Nexys4-DDR / Zedboard (need a USBUART Pmod)
We still want to keep using Nexys4-DDR due to its low price.
Honest speaking, it becomes difficult as the LUT consumption is around
90% for minion-v0.4 (one rocket + one PULP).
Jonathan has tried the Nexys-Video board but with issues in UART and
QSPI Flash if I remember it right.
VC707 or KC705 is too expensive for most people, so even if we support
it, another low-cost board should be chosen as well.
Hopefully there is no need to change in the near future; however, if we
must, I do not have a clear answer right now.
On 09/06/2017 05:18, Tobias Strauch wrote:
Wei, I try to follow statements from the lowRISC guys closely, but
I’m still puzzled:
What is the demo installation board for your next release, if you want to use all the
beautiful features (tagged, minions, debug), that come with it ? I think Alex mentioned
the vc707 at the 5th WS, but please confirm.
Thanks a lot, Tobias
PS: Looking forward to your release ...
> Wei Song <ws327(a)cam.ac.uk> hat am 8. Juni 2017 um 11:20 geschrieben:
> Hello Alisson,
> This is not a direct recommendation but just a note.
> We do not support the Xilinx zc706 dev board. To be more specific, we do
> not direct support any Zynq FPGA after our 2016 releases. Recently
> Furkan has ported out debug-v0.3 to Zedboard, but the ARM core is not used.
> For lowRISC, we would recommend pure FPGA dev boards which use Kintex or
> Virtex FPGAs.
> The recommended board right now is Nexys4-DDR, which still has around
> 30% area left if you get rid of the tagged memory, minion and trace
> debugger. I think this might be enough to have a BOOM core replacing the
> Rocket one.
> The price for Nexys4-DDR is around 320 USD from Digilent.
> Best regards,
> On 07/06/2017 21:53, Alisson Linhares wrote:
>> Hi everyone,
>> I want to buy an FPGA board to work with LowRISC. However, the FPGA needs
>> to be large enough to fit a BOOM core. The zc706 is too expensive for me.
>> Therefore, I'm looking for a cheaper alternative.
>> Does anyone have any suggestion?