SEGGER's IP over USB

[purfield]

I'm working on a project that uses a microcontroller and it would benefit from something like this:

https://www.segger.com/products/connectivity/emusb-device/add-ons/ip-over-usb/#resource-usage

It's a software stack by SEGGER that allows a microcontroller to run a web server connected over USB to a host.  The only problem is that the pricing from SEGGER is a bit hard to swallow (looks like maybe $10k?)

Has a similar approach ever been implemented with open source?

[ajb]

That's kinda neat.  I doubt there's an existing complete alternative, but you can get partway there with LWIP and any existing web server library that is designed to work with it.  That leaves the USB side of things, which presumably uses CDC-ECM and appropriate class drivers?  I wonder how many MCU vendors include CDC-ECM in their USB frameworks.  XMOS has an appnote for IP over USB that may help: https://www.xmos.com/download/AN00131:-USB-CDC-ECM-Class-for-Ethernet-over-USB(2.0.2rc1).pdf 

[ehughes]

Well,  if it is for commercial work then that cost is worth it. 


tinyUSB has a good device stack.

https://github.com/hathach/tinyusb/tree/master/examples/device

It has a USB device example to implement network + a webserver.

[hans]

The architecture picture says it all; the Segger solution relies on USB-ECM

I think there are plenty of "examples" around for microcontorllers such as the STM32 and the like: https://github.com/search?q=usb+ecm&type=Repositories

edit: Also interesting keywords are CDC-ECM and RNDIS (although  I believe that's a different protocol/standard entirely)

[purfield]

Awesome, thanks for the tips everybody!

[theatrus]

I'm glad we've moved on from RNDIS

[JoeyG]

Or something ready made https://www.microchip.com/wwwproducts/en/LAN7500

[RRCXUD]

If you are using STM32, ST USB library supports both ECM and RNDIS.
https://github.com/STMicroelectronics/stm32_mw_usb_device
You can find webserver over RNDIS examples in their cube packages.