5 ms·

I'd like to get started with RISC-V chips. Can anyone reccommend a good dev board similarly priced or spec'd to the Pi Pico? Would be nice if the standalone SoC

I'd like to get started with RISC-V chips. Can anyone reccommend a good dev board similarly priced or spec'd to the Pi Pico? Would be nice if the standalone SoC are easy to acquire as well. Which is the best cost wise? Which is the best performance wise? Power consumption wise? I don't need WiFi/Bluetooth though it would be nice. Low cost is preferrable over sheer performance. Ideally I get a fair amount of GPIO (>30) and it supports 3V or 5V.

hasheddan 3y ago
I have really enjoyed the ESP32-C3 (https://www.espressif.com/en/products/socs/esp32-c3 https://www.espressif.com/en/products/socs/esp32-c3) I have written a few posts that may help you get started with it: - https://danielmangum.com/posts/risc-v-bytes-exploring-custom-esp32-bootloader/ https://danielmangum.com/posts/risc-v-bytes-exploring-custom... - https://danielmangum.com/posts/risc-v-bytes-zephyr-on-esp32/ https://danielmangum.com/posts/risc-v-bytes-zephyr-on-esp32/ - https://danielmangum.com/posts/risc-v-bytes-zephyr-before-main/ https://danielmangum.com/posts/risc-v-bytes-zephyr-before-ma... - https://danielmangum.com/posts/risc-v-bytes-semihosting-zephyr-esp32/ https://danielmangum.com/posts/risc-v-bytes-semihosting-zeph...
anotherhue 3y ago
https://takahirox.github.io/riscv-rust/ https://takahirox.github.io/riscv-rust/
- sitkack 3y ago
  This is really cool. This is riscv running under wasm in your browser and else where. Paired with a web repl and some JS peripherals, should should probably be the top answer.
  - brucehoult 3y ago
    This is much more usable, Full Fedora, with everything you'd expect: https://bellard.org/jslinux/vm.html?cpu=riscv64&url=fedora33-riscv.cfg&mem=256 https://bellard.org/jslinux/vm.html?cpu=riscv64&url=fedora33...
genmud 3y ago
WCH has a bunch of new ones that have come out recently, like the CH32V003 and CH32V307 [1]. I would start there, they are close enough and could probably run micropython since they have some that have reasonable amounts of SRAM. I think they are mostly looking to replace STM32s though. [1] http://www.wch-ic.com/products/CH32V003.html http://www.wch-ic.com/products/CH32V003.html
cwassert 3y ago
Pine64 also has a RISC-V SBC. I like their products, but I did not buy a Star64 yet. https://pine64.com/product-category/star64/ https://pine64.com/product-category/star64/
- freedomben 3y ago
  I don't know why this comment was dead. Pine64 is legit and the Star64 looks like a viable option. Anyone with experience on the Star64? I've had some rough times in the past with Pine64 products, from boards dying to the pinebook pro suddenly unable to boot from sd card. Better documentation would have helped. I didn't have hours to comb through forums and discords/matrices. Still have a major warm place in my heart for Pine64 though, and overall have felt like they're a good value.
  - mmoskal 3y ago
    I guess the question was about board with specs similar to Pi Pico (~264kB of RAM) and the Star64 is more similar to RPi4 (~4GB of RAM).
    - yjftsjthsd-h 3y ago
      Right, the Star64 is like the full-size Pi; the equivalent to the Pico would be the Ox64 line.
camel-cdr 3y ago
I've been happy with my mango pi mq pro, but that might be more powerful than what you are looking for. It's very similar to the raspberry pi zero w.
brucehoult 3y ago
Probably the closest to a Pico in terms of being symmetrical would be the $9 Milk-V duo with two 1 GHz C906 cores (with vector units), and 64 MB RAM. It's obviously far more powerful than the Pico. And isn't available outside China yet. Taking a step down to things that are actually available, the Sipeed M1s Dock and Pine64 Ox64 use the BL808 chip which has one 320 MHz 32 bit core, one 480 MHz 64 bit core (with vector processor), and a 3rd smaller 32 bit core that is intended to be dedicated to running the WIFI/BT. This chip also has 64 MB of on-chip RAM. The Ox64 is $6 or $8 depending on how big a flash chip (2 MB or 16 MB) it has. The M1s is a little more. Going back to 2019, the Kendryte K210 chip has two 400 MHz 64 bit cores and 8 MB of RAM. There have been a ton of boards using it, especially from Sipeed but it's a bit more expensive than the newer chips. There are tons of cheaper boards, but they tend to be single core and only a few KB to few hundred KB of RAM.
nerpderp82 3y ago
You of course want to go with RUST + RISCV https://www.mouser.com/ProductDetail/Espressif-Systems/ESP32-C3-DevKit-RUST-1?qs=4ASt3YYao0WvXOj9TGjU2A%3D%3D https://www.mouser.com/ProductDetail/Espressif-Systems/ESP32... ESP32-C3-DevKit-RUST-1 $21 shipped from Mouser. https://github.com/esp-rs/esp-rust-board https://github.com/esp-rs/esp-rust-board
thepiwo 3y ago
I'm using the StarFive VisionFive 2 and its working quite well, there are debain and ubuntu images available as well as some other distributions, generally most of the boards features are working fine and there is a community around it actively improving software support. For your requirements it might be a bit overkill in performance as its more in the neighborhood of a RasperryPi 3/4 in terms of size, power consumption and performance.
K0balt 3y ago
Esp32-C3. Arduino, micropython, rust, and bog standard C/C++ are all well supported. BLE/Wifi support, dev boards < $5usd are common. https://www.espressif.com/en/products/socs/esp32-c3 https://www.espressif.com/en/products/socs/esp32-c3

hasheddan 3y ago

I have really enjoyed the ESP32-C3 (https://www.espressif.com/en/products/socs/esp32-c3 https://www.espressif.com/en/products/socs/esp32-c3) I have written a few posts that may help you get started with it: - https://danielmangum.com/posts/risc-v-bytes-exploring-custom-esp32-bootloader/ https://danielmangum.com/posts/risc-v-bytes-exploring-custom... - https://danielmangum.com/posts/risc-v-bytes-zephyr-on-esp32/ https://danielmangum.com/posts/risc-v-bytes-zephyr-on-esp32/ - https://danielmangum.com/posts/risc-v-bytes-zephyr-before-main/ https://danielmangum.com/posts/risc-v-bytes-zephyr-before-ma... - https://danielmangum.com/posts/risc-v-bytes-semihosting-zephyr-esp32/ https://danielmangum.com/posts/risc-v-bytes-semihosting-zeph...

anotherhue 3y ago

https://takahirox.github.io/riscv-rust/ https://takahirox.github.io/riscv-rust/

sitkack 3y ago
This is really cool. This is riscv running under wasm in your browser and else where. Paired with a web repl and some JS peripherals, should should probably be the top answer.
- brucehoult 3y ago
  This is much more usable, Full Fedora, with everything you'd expect: https://bellard.org/jslinux/vm.html?cpu=riscv64&url=fedora33-riscv.cfg&mem=256 https://bellard.org/jslinux/vm.html?cpu=riscv64&url=fedora33...

genmud 3y ago

WCH has a bunch of new ones that have come out recently, like the CH32V003 and CH32V307 [1]. I would start there, they are close enough and could probably run micropython since they have some that have reasonable amounts of SRAM. I think they are mostly looking to replace STM32s though. [1] http://www.wch-ic.com/products/CH32V003.html http://www.wch-ic.com/products/CH32V003.html

cwassert 3y ago

Pine64 also has a RISC-V SBC. I like their products, but I did not buy a Star64 yet. https://pine64.com/product-category/star64/ https://pine64.com/product-category/star64/

freedomben 3y ago
I don't know why this comment was dead. Pine64 is legit and the Star64 looks like a viable option. Anyone with experience on the Star64? I've had some rough times in the past with Pine64 products, from boards dying to the pinebook pro suddenly unable to boot from sd card. Better documentation would have helped. I didn't have hours to comb through forums and discords/matrices. Still have a major warm place in my heart for Pine64 though, and overall have felt like they're a good value.
- mmoskal 3y ago
  I guess the question was about board with specs similar to Pi Pico (~264kB of RAM) and the Star64 is more similar to RPi4 (~4GB of RAM).
  - yjftsjthsd-h 3y ago
    Right, the Star64 is like the full-size Pi; the equivalent to the Pico would be the Ox64 line.

camel-cdr 3y ago

I've been happy with my mango pi mq pro, but that might be more powerful than what you are looking for. It's very similar to the raspberry pi zero w.

brucehoult 3y ago

Probably the closest to a Pico in terms of being symmetrical would be the $9 Milk-V duo with two 1 GHz C906 cores (with vector units), and 64 MB RAM. It's obviously far more powerful than the Pico. And isn't available outside China yet. Taking a step down to things that are actually available, the Sipeed M1s Dock and Pine64 Ox64 use the BL808 chip which has one 320 MHz 32 bit core, one 480 MHz 64 bit core (with vector processor), and a 3rd smaller 32 bit core that is intended to be dedicated to running the WIFI/BT. This chip also has 64 MB of on-chip RAM. The Ox64 is $6 or $8 depending on how big a flash chip (2 MB or 16 MB) it has. The M1s is a little more. Going back to 2019, the Kendryte K210 chip has two 400 MHz 64 bit cores and 8 MB of RAM. There have been a ton of boards using it, especially from Sipeed but it's a bit more expensive than the newer chips. There are tons of cheaper boards, but they tend to be single core and only a few KB to few hundred KB of RAM.

nerpderp82 3y ago

You of course want to go with RUST + RISCV https://www.mouser.com/ProductDetail/Espressif-Systems/ESP32-C3-DevKit-RUST-1?qs=4ASt3YYao0WvXOj9TGjU2A%3D%3D https://www.mouser.com/ProductDetail/Espressif-Systems/ESP32... ESP32-C3-DevKit-RUST-1 $21 shipped from Mouser. https://github.com/esp-rs/esp-rust-board https://github.com/esp-rs/esp-rust-board

thepiwo 3y ago

I'm using the StarFive VisionFive 2 and its working quite well, there are debain and ubuntu images available as well as some other distributions, generally most of the boards features are working fine and there is a community around it actively improving software support. For your requirements it might be a bit overkill in performance as its more in the neighborhood of a RasperryPi 3/4 in terms of size, power consumption and performance.

K0balt 3y ago

Esp32-C3. Arduino, micropython, rust, and bog standard C/C++ are all well supported. BLE/Wifi support, dev boards < $5usd are common. https://www.espressif.com/en/products/socs/esp32-c3 https://www.espressif.com/en/products/socs/esp32-c3