From: Yehowshua <yimmanuel3@gatech.edu>
To: Libre-RISCV General Development <libre-riscv-dev@lists.libre-riscv.org>
Subject: Re: [libre-riscv-dev] daily kan-ban update 08mar2020
Date: Fri, 8 May 2020 16:27:28 -0400
Message-ID: <D311CF96-8F97-4D2C-8D36-B85532F0D4A5@gatech.edu> (raw)
In-Reply-To: <CAPweEDw-nM8HiGuMaSZPsvf0HBJCCpAfRQjJJOpUZce7uiBOrQ@mail.gmail.com>
Today I worked on legal things.
Also put a rough sketch together for the minimum number of interfaces we need to support.
I put USB and ethernet at second priority. I talked with Florent from EnjoyDigital, and while LiteX supports USB, it may require some non-trivial modification on our part if we didn’t want to go with (FTDI or Cypress) chips which I think max out at 200MB/s.
He pointed me to some alternatives in both Migen and nMigen:
- https://github.com/im-tomu/valentyusb <https://github.com/im-tomu/valentyusb>
- https://github.com/lambdaconcept/lambdaUSB <https://github.com/lambdaconcept/lambdaUSB>
- https://github.com/greatscottgadgets/luna <https://github.com/greatscottgadgets/luna>
I’ll pop them on the Wiki.
Litex also support ethernet which would require a $20 PHY, not great for a low cost SBC. We could also do ethernet over USB - this would render the boot loader slightly more complex if we wished to use ethernet during the boatloader.
Again, ethernet is not **essential for a minimum viable ASIC.
Yehowshua
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Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-08 10:56 Luke Kenneth Casson Leighton
2020-05-08 10:59 ` Luke Kenneth Casson Leighton
2020-05-08 13:51 ` Yehowshua
2020-05-08 15:16 ` Luke Kenneth Casson Leighton
2020-05-08 17:25 ` Staf Verhaegen
2020-05-08 22:23 ` Luke Kenneth Casson Leighton
2020-05-08 13:28 ` Michael Nolan
2020-05-08 14:03 ` Michael N
2020-05-08 15:25 ` Luke Kenneth Casson Leighton
2020-05-08 20:47 ` Michael Nolan
2020-05-08 22:48 ` Luke Kenneth Casson Leighton
2020-05-08 15:10 ` Luke Kenneth Casson Leighton
2020-05-08 15:21 ` Michael Nolan
2020-05-08 15:27 ` Luke Kenneth Casson Leighton
2020-05-08 20:27 ` Yehowshua [this message]
2020-05-08 21:39 ` Jacob Lifshay
2020-05-08 22:34 ` [libre-riscv-dev] daily kan-ban update 08may2020 Jacob Lifshay
2020-05-08 23:09 ` Luke Kenneth Casson Leighton
2020-05-09 0:31 ` Yehowshua
2020-05-09 8:25 ` Luke Kenneth Casson Leighton
2020-05-09 14:33 ` Yehowshua
2020-05-08 22:45 ` [libre-riscv-dev] daily kan-ban update 08mar2020 Luke Kenneth Casson Leighton
2020-05-08 22:41 ` Luke Kenneth Casson Leighton
2020-05-08 20:38 Alain D D Williams
2020-05-08 20:47 ` Luke Kenneth Casson Leighton
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