[libre-riscv-dev] Which ECP5 FPGA

[libre-riscv-dev] Which ECP5 FPGA

[Yehowshua]

I may have missed this, but which ECP5 FPGA are we targeting specifically?

A few good options:
Versa 5G - pretty expensive but has all the peripherals but HDM
ULX3S - backordered
Orange Crab - affordable, no peripherals beyond USB.


Yehowshua


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Re: [libre-riscv-dev] Which ECP5 FPGA

[Jacob Lifshay]

On Sun, Jul 19, 2020, 12:31 Yehowshua <yimmanuel3@gatech.edu> wrote:

> I may have missed this, but which ECP5 FPGA are we targeting specifically?
>
> A few good options:
> Versa 5G - pretty expensive but has all the peripherals but HDM
> ULX3S - backordered
> Orange Crab - affordable, no peripherals beyond USB.
>

I haven't checked what they provide, but one critical requirement is that
they have (or we add) enough ram to run Linux -- it's theoretically
possible to run in a few MB but >128MB is a good idea (>1GB preferred)
since then that's enough we might be able to run some simple JIT
compilation tasks as needed for the Vulkan driver.

Jacob
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Re: [libre-riscv-dev] Which ECP5 FPGA

[Yehowshua]

> I haven't checked what they provide, but one critical requirement is that
> they have (or we add) enough ram to run Linux -- it's theoretically
> possible to run in a few MB but >128MB is a good idea (>1GB preferred)
> since then that's enough we might be able to run some simple JIT
> compilation tasks as needed for the Vulkan driver.

They each have 128Mb.

Yehowshua

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Re: [libre-riscv-dev] Which ECP5 FPGA

[Luke Kenneth Casson Leighton]

On Sunday, July 19, 2020, Yehowshua <yimmanuel3@gatech.edu> wrote:

> I may have missed this, but which ECP5 FPGA are we targeting specifically?
>
> A few good options:
> Versa 5G - pretty expensive but has all the peripherals but HDM


versa ecp5

mouser part number:

842-LE5UM45FVERSAEVN
<http://www.mouser.com/ProductDetail/lattice/lfe5um-45f-versa-evn/?qs=J7VcZjJ3Z9cK61xZC6pcWg%3d%3d&countrycode=GB&currencycode=GBP>
LFE5UM-45F-VERSA-EVN
ECP5 Versa

if you recall i got it a few weeks ago when you mentioned that you had
access to one.

l.
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Re: [libre-riscv-dev] Which ECP5 FPGA

[Yehowshua]

> if you recall i got it a few weeks ago when you mentioned that you had
> access to one.

Great. I remember you said you’d get it. Didn’t know if you did haha
Were you able to program it?

Yehowshua
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Re: [libre-riscv-dev] Which ECP5 FPGA

[Luke Kenneth Casson Leighton]

On Sun, Jul 19, 2020 at 9:05 PM Yehowshua <yimmanuel3@gatech.edu> wrote:
>
> > if you recall i got it a few weeks ago when you mentioned that you had
> > access to one.
>
> Great. I remember you said you’d get it. Didn’t know if you did haha
> Were you able to program it?

yehyeh, ran the blinky lights example.  i had to make some changes,
there's some boards that were confused with ecp5 and ecp5g - if one
openocd config does not work use the other one.

l.

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