3 ms·

WebUSB Support for RP2040

22 points by roywashere 3y ago

roywashere 3y ago
I think it is super interesting to see that such a nice to have feature for such a big platform depends exclusively on a few individuals. I.e. there seems no-one from the Foundation driving this. I would have assumed there are at least one or two people there who would help out with this kind of stuff
deleted 3y ago
[deleted]
westurner 3y ago
This makes an RP2040 Raspberry Pi Pico usable as a WebUSB 2x20 pin GPIO from JS or e.g. Python in WASM. /q rp2040 "WebBluetooth" awesome-web-serial lists a few RP2040-compatible things: https://github.com/louisfoster/awesome-web-serial https://github.com/louisfoster/awesome-web-serial web-bluetooth-repl is a REPL over WebBluetooth with MicroPython devices that support Bluetooth: https://github.com/siliconwitchery/web-bluetooth-repl https://github.com/siliconwitchery/web-bluetooth-repl Pybricks does MicroPython over WebBluetooth with a NextJS app.
- westurner 3y ago
  Also, the Ryanteck RTk.GPIO (PC GPIO Interface) has USB and 2x20 pin GPIO: https://uk.pi-supply.com/collections/all-raspberry-pi-hats-and-phats/products/ryanteck-rtk-gpio-pc-gpio-interface https://uk.pi-supply.com/collections/all-raspberry-pi-hats-a... : > The RTk.GPIO is a Plug & Play USB Device which adds 28 x Raspberry Pi style GPIO pins to your computer The Pi Pico RP2040 has one onboard LED on pin 25. The Pi Pico W (RP2040W) has an onboard LED but it's no longer connected to the 2x20 GPIO, so it's `machine.Pin("LED")` instead of `machine.Pin(25)`. Wokwi has a WASM Pi Pico simulator.
turbocrime 3y ago
i assumed webusb was entirely host-side, but apparently a device can provide a descriptor specifying a URI to the intended compatible page, and that seems to be one of the features of this PR. https://developer.chrome.com/articles/build-for-webusb/#webusb-descriptors https://developer.chrome.com/articles/build-for-webusb/#webu... the rest of it seems a little strange. the webserial API should be able to talk to any class-compliant serial device, that's already supported. https://developer.chrome.com/articles/serial/#open-port https://developer.chrome.com/articles/serial/#open-port the 0x22 request type isn't part of any webusb standard, it is from a tinyusb example program where they demo connecting webusb and webserial to the same device, which is a little strange and probably not what you're doing with the rp2040.
jeroen79 3y ago
How can it have WebUSB when the RP2040 doesn't have any wifi or network?
- matthews2 3y ago
  WebUSB is about a web page communicating with USB devices. So the USB device itself doesn't need to be connected to the Internet, it just needs to be plugged into a PC with a web browser (Chrome).

22 points by roywashere 3y ago

I think it is super interesting to see that such a nice to have feature for such a big platform depends exclusively on a few individuals. I.e. there seems no-one from the Foundation driving this. I would have assumed there are at least one or two people there who would help out with this kind of stuff

deleted 3y ago

[deleted]

westurner 3y ago

This makes an RP2040 Raspberry Pi Pico usable as a WebUSB 2x20 pin GPIO from JS or e.g. Python in WASM. /q rp2040 "WebBluetooth" awesome-web-serial lists a few RP2040-compatible things: https://github.com/louisfoster/awesome-web-serial https://github.com/louisfoster/awesome-web-serial web-bluetooth-repl is a REPL over WebBluetooth with MicroPython devices that support Bluetooth: https://github.com/siliconwitchery/web-bluetooth-repl https://github.com/siliconwitchery/web-bluetooth-repl Pybricks does MicroPython over WebBluetooth with a NextJS app.

westurner 3y ago
Also, the Ryanteck RTk.GPIO (PC GPIO Interface) has USB and 2x20 pin GPIO: https://uk.pi-supply.com/collections/all-raspberry-pi-hats-and-phats/products/ryanteck-rtk-gpio-pc-gpio-interface https://uk.pi-supply.com/collections/all-raspberry-pi-hats-a... : > The RTk.GPIO is a Plug & Play USB Device which adds 28 x Raspberry Pi style GPIO pins to your computer The Pi Pico RP2040 has one onboard LED on pin 25. The Pi Pico W (RP2040W) has an onboard LED but it's no longer connected to the 2x20 GPIO, so it's `machine.Pin("LED")` instead of `machine.Pin(25)`. Wokwi has a WASM Pi Pico simulator.

turbocrime 3y ago

i assumed webusb was entirely host-side, but apparently a device can provide a descriptor specifying a URI to the intended compatible page, and that seems to be one of the features of this PR. https://developer.chrome.com/articles/build-for-webusb/#webusb-descriptors https://developer.chrome.com/articles/build-for-webusb/#webu... the rest of it seems a little strange. the webserial API should be able to talk to any class-compliant serial device, that's already supported. https://developer.chrome.com/articles/serial/#open-port https://developer.chrome.com/articles/serial/#open-port the 0x22 request type isn't part of any webusb standard, it is from a tinyusb example program where they demo connecting webusb and webserial to the same device, which is a little strange and probably not what you're doing with the rp2040.

jeroen79 3y ago

How can it have WebUSB when the RP2040 doesn't have any wifi or network?

matthews2 3y ago
WebUSB is about a web page communicating with USB devices. So the USB device itself doesn't need to be connected to the Internet, it just needs to be plugged into a PC with a web browser (Chrome).