Move to litex defined fomu platform

[TomKeddie]

I'm just starting to learn litex, seems like somewhere there must be a platform defined for fomu that this can just use. If there isn't we should create one.

These seem like fairly simple tasks, I'd be happy to take this on.

[TomKeddie]

@mithro is there a litex platform/board defined for tomu that you know of? Thanks.

[mithro]

@TomKeddie There are "three" Fomu platforms;

• Hacker Board (which you get from me)
• EVT Board (which was a special thing for the CrowdSupply campaign)
• Production Board (which will soon ship from the CrowdSupply campaign)

I'm unsure were @xobs has put his platform files for Foboot (?)

I have the following;

• platforms/fomu_evt.py
• platforms/fomu_hacker.py

[mithro]

@TomKeddie FYI - We should get the fomu_hacker.py and fomu_production.py these in the upstream LiteX repository....

[TomKeddie]

@mithro thanks, foboot defines it all in the one python file (https://github.com/im-tomu/foboot/blob/master/hw/foboot-bitstream.py). I'll take a look at what you have and try to submit a PR to @xobs to use them. I'm working towards making foboot more platform independent.

[mithro]

@xobs is probably currently very busy with making production happen so he will probably be slow to respond.

[TomKeddie]

is probably currently very busy with making production happen so he will probably be slow to respond.

Yep, I'm trying to do obvious stuff that will be helpful without needing his input.

[mithro]

@TomKeddie I'm very supportive of the idea of having Foboot running on Artix-7 and Spartan-6 FPGA hardware.

[TomKeddie]

I'm very supportive of the idea of having Foboot running on Artix-7 and Spartan-6 FPGA hardware.

@mithro thanks. Once the Trenz releases the design files for Kevin's s7 mini board I'm thinking to re-roll it with a usb connector so he can ship them ready to use instead of needing a ftdi serial cable. https://twitter.com/bml_khubbard/status/1132725651125837824

[mithro]

@TomKeddie Sounds like a great plan!

[xobs]

Now that the hardware is more solidified, we can start to integrate parts of foboot-bitstream.py into upstream litex. I was hesitant to do that at first, since it can be difficult to make modifications once something is upstream.

[xobs]

This is now how we build things -- using the fomu platform from litex-hub.