#lichee-pi — Public Fediverse posts

Ищем выход из лабиринтов RISC-V ISA: ускорение инференса с тензорным компилятором и JIT-ассемблером

Привет, Хабр! Меня зовут Илья Знаменский, я ведущий инженер в группе оптимизации алгоритмов искусственного интеллекта в AI-дивизионе

https://habr.com/ru/companies/yadro/articles/970390/

#RISCV #AI #devboards #Inference_optimizations #JIT #bananapi #rvv #licheepi #xbyak #compiler

Finally! I was able to breathe life into the e-ink display using my F1C100s devboard (the #LicheePi Nano).

After weeks of struggle, kernel compiling, devicetree hacking,
reverse engineering, and many other adventures, I couldn't be happier to see my stupid jspaint drawing appear on the screen.

There's still a little bit of cheating going on here, for some reason the busy signal isn't working, so I put some sleep calls here and there, but hopefully I'll figure that out as well.

The #LicheePi Nano board seem to have a quite extensive documentation, even trough it's in Chinese. I can Google translate myself trough it. (Sadly most of the external sources referenced in the docs no longer seem to exists.)

The first funny thing I've found is how you enter FEL mode on this board:

> Short-circuit the 1 and 4 pins of the flash, power on again, release the short circuit after powering on, and you can re-enter the FEL mode and download again.

Oh right, so the manufacturer's docs instruct me to short some pins on some IC on the board. This is going to be fun!

After some fiddling it did worked for the 3rd try! I could dump the factory OS image just fine.
It seems like the board survived me pushing metal objects to it one hand while powering it up with the other.

How excited can you get over 32 megs of RAM and a ~400Mhz CPU?
Well, I certainly am super-duper-excited.

I've just got my #LicheePi Nano today, and already started tinkering with it.

The cool part of this board is the SoC itself. It's an Allwinner F1C100s which has integrated DDR RAM. This makes it easy to use it in your own project when you are an electrical noob like me. And it runs Linux!

I've got the inspiration from here: https://popovicu.com/posts/making-my-first-embedded-linux-system/

(yes the pins are not actually soldered on the pic, but they work)

Sipeed is expanding its ecosystem of modular Lichee Pi devices with RISC-V processors with a new LM5a module featuring an ESWIN EIC7700 chip with a quad-core SiFive P550 RG64GBC CPU and a 13.3 TOPS AI accelerator and PCIe 3.0 x4 support. https://buff.ly/3MsRWpf #Sipeed #LM5A #LicheePi #RISCV

Sipeed Lichee Pi 3A is a low-cost RISC-V dev board with 2 PCIe 2.0 slots, up to 16GB of RAM

The Sipeed Lichee Pi 3A is a compact with a SpacemiT K1 RISC-V processor featuring eight CPU cores with support for speeds up to 1.6 GHz, an 819 MHz Imagination BXE-2-32 GPU, and a neural processing unit with up to 2 TOPS Of AI performance.
But there are a few things that make this little computer different from others with the same chip. For one […]

https://liliputing.com/?p=170392

#devBoard #licheePi #licheePi3a #riscV #sbc #sipeed #sipeedLicheePi3a #spacemit #spacemitK1

#riscv #licheepi board https://www.youyeetoo.com/products/licheepi-4a-risc-v-single-board-computer?mc_cid=47af3849c2&VariantsId=11270

Whoa, look how cool this #LicheePi #RISCV hardware is! The want is strong, especially for that little 7" netbook with a nubbin mouse. https://sipeed.com/licheepi4a

Why do i even bother with this shit?

On top of that I have to pay a significant sum of money for each of the contribution only to be treated like shit and having to rewrite my code into disfunctional trash.

https://github.com/armbian/build/pull/5689#pullrequestreview-1623734454

#OSS #FOSS #Armbian #riscv #licheepi #lm4a

Now that u-root is running fine on the #LicheePi Nano, here is the obligatory #LED #demo. Guess how long it took me to figure out the pin assignment. Thanks to people writing about it! :blobwizard:

https://wise-self.tistory.com/39

With a symlink to init in /sbin/init, u-root on the #LicheePi Nano now properly boots up. :)

So here's the beautiful ASCII art greeter. \o/

Welcome to u-root!

#OpenSourceFirmware #firmware #hacking #Linux

Oh look, I have u-root running on a #LicheePi Nano! \o/

#firmware #hacking
✨👩🏻‍💻✨