STM32L5 Using Mongoose over RNDIS and USB CDC

[sckid1108]

Has anyone gotten this to work ?

[scaprile]

Mongoose runs either over a Berkeley-compatible socket API or using its own TCP/IP stack with a driver over an Ethernet frame transport (including a device like pcap or tap). Can you provide any one of those ? What is your environment (OS, etc) ? What is your use case ?

[sckid1108]

Baremetal STM32L4 or L5 device using USB CDC RNDIS Stack From the HAL Libraries. See attached for the STM32 CDC RNDIS Class Library. Michael Margolese Principal Engineer Tenuvah Designs http://www.tenuvahdesigns.com Phone: (424) 288-9585

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On Wed, Dec 14, 2022 at 4:09 AM Sergio R. Caprile ***@***.***> wrote: Mongoose runs either over a Berkeley-compatible socket API or using its own TCP/IP stack with a driver over an Ethernet frame transport (including a device like pcap or tap). Can you provide any one of those ? What is your environment (OS, etc) ? What is your use case ? — Reply to this email directly, view it on GitHub <#1922 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AYMHAOXGFE5I3LKKBFRQBGDWNG2GXANCNFSM6AAAAAAS6AOHEQ> . You are receiving this because you authored the thread.Message ID: ***@***.***>

[scaprile]

Sorry, attachments on replies don't seem to go through, you have to manually add them.
As far as I get, the CDC class will provide a modem interface and RNDIS will provide an Ethernet-like interface on top of that. STM32CubeIDE doesn't seem to integrate lwIP on that, if you manually integrate it you could use it, perhaps writing an interface (netif). Or, you might try our own stack.
I forwarded this information to our Support Department.

[cpq]

Thanks @scaprile ! @sckid1108 , it looks like it is quite possible to do - could you put together a brief description of what you're trying to achieve on a high level, please? Feel free to email support@cesanta.com to setup a quick call to discuss that.

[sckid1108]

I want to do Ethernet over USB and use LWiP as the networking layer. Simple concept is that the embedded device can interact with a browser using WebSockets for being able to control devices from webpages or over the internet. Here is an example project that I have mostly integrated but I am no expert in LWiP Device enumerates as a CDC ACM device (Virtual Com Port) *but* does not get a proper driver from windows to show up as an ethernet device Dont know if i am using the LWiP stack incorrectly. https://www.dropbox.com/t/0hPg5khaUG1gnZ3t Let me know what you think Michael Margolese Principal Engineer Tenuvah Designs http://www.tenuvahdesigns.com Phone: (424) 288-9585

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On Thu, Dec 15, 2022 at 5:03 AM Sergey Lyubka ***@***.***> wrote: Thanks @scaprile <https://github.com/scaprile> ! @sckid1108 <https://github.com/sckid1108> , it looks like it is quite possible to do - could you put together a brief description of what you're trying to achieve on a high level, please? Feel free to email ***@***.*** to setup a quick call to discuss that. — Reply to this email directly, view it on GitHub <#1922 (reply in thread)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AYMHAOR75Z6GF6GYZ5YPWDTWNMJKRANCNFSM6AAAAAAS6AOHEQ> . You are receiving this because you were mentioned.Message ID: ***@***.***>

[scaprile]

This is baremetal, lwIP works with NO_SYS=1 hence it does not provide a socket-compatible interface, so Mongoose would need an adaptation layer to work with lwIP's RAW API.

[sckid1108]

Hey Guys, Here is a much better example I got working on my STM32L422KBT board. https://www.dropbox.com/t/nmUJp3phrQUdkyu8 Uses TinyUSB with LWiP to serve a web page etc. Would be SOOO much better with Mongoose. Michael Margolese Principal Engineer Tenuvah Designs http://www.tenuvahdesigns.com Phone: (424) 288-9585

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On Thu, Dec 15, 2022 at 9:48 AM Sergio R. Caprile ***@***.***> wrote: This is baremetal, lwIP works with NO_SYS=1 hence it does not provide a socket-compatible interface, so Mongoose would need an adaptation layer to work with lwIP's RAW API. — Reply to this email directly, view it on GitHub <#1922 (reply in thread)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AYMHAOTXSKZZ37QLYV33VB3WNNKYVANCNFSM6AAAAAAS6AOHEQ> . You are receiving this because you were mentioned.Message ID: ***@***.***>

[cpq]

@sckid1108 we've added a mongoose example for tinyusb + rndis, see https://github.com/cesanta/mongoose/tree/master/examples/stm32/nucleo-f429zi-usb-rndis

That is a bare metal example, which you can apply with almost no changes to other STM MCUs.
All you need to do, is to setup USB pins and enable USB FS.

Clone mongoose repo, go to this directory and type make. You need ARM GCC installed.
That was tested on F429 board, on MacOS:

Talking to a device web server from the workstation:

$ curl 192.168.3.1
hi

[sckid1108]

AMAZING !!! I will port to my board and test as well ! Michael Margolese Principal Engineer Tenuvah Designs http://www.tenuvahdesigns.com Phone: (424) 288-9585

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On Mon, Dec 19, 2022 at 6:39 AM Sergey Lyubka ***@***.***> wrote: @sckid1108 <https://github.com/sckid1108> we've added a mongoose example for tinyusb + rndis, see https://github.com/cesanta/mongoose/tree/master/examples/stm32/nucleo-f429zi-usb-rndis Clone mongoose repo, go to this directory and type make. You need ARM GCC installed. That was tested on F429 board, on MacOS: [image: Screenshot 2022-12-19 at 14 37 28] <https://user-images.githubusercontent.com/601816/208450122-c7227a82-66a2-43c0-9374-94d4b72a924e.png> Talking to a device web server from the workstation: $ curl 192.168.3.1 hi — Reply to this email directly, view it on GitHub <#1922 (reply in thread)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AYMHAORZO4ZB2XDTXJDPGC3WOBXQPANCNFSM6AAAAAAS6AOHEQ> . You are receiving this because you were mentioned.Message ID: ***@***.***>

[cpq]

@sckid1108 we might prep the STM32L example as well.
Out of curiosity, what middleware do you use ? FreeRTOS ?

[sckid1108]

I will send you my code if i get it working. For shipping products we ship BAREMETAL. No RTOS at all. Michael Margolese Principal Engineer Tenuvah Designs http://www.tenuvahdesigns.com Phone: (424) 288-9585

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On Mon, Dec 19, 2022 at 11:23 AM Sergey Lyubka ***@***.***> wrote: @sckid1108 <https://github.com/sckid1108> we might prep the STM32L example as well. Out of curiosity, what middleware do you use ? FreeRTOS ? — Reply to this email directly, view it on GitHub <#1922 (reply in thread)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AYMHAOXLAOVAYPA4LV4C3K3WOCY4LANCNFSM6AAAAAAS6AOHEQ> . You are receiving this because you were mentioned.Message ID: ***@***.***>

[sckid1108]

STM32 HAL Libraries also Michael Margolese Principal Engineer Tenuvah Designs http://www.tenuvahdesigns.com Phone: (424) 288-9585

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On Mon, Dec 19, 2022 at 11:23 AM Sergey Lyubka ***@***.***> wrote: @sckid1108 <https://github.com/sckid1108> we might prep the STM32L example as well. Out of curiosity, what middleware do you use ? FreeRTOS ? — Reply to this email directly, view it on GitHub <#1922 (reply in thread)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AYMHAOXLAOVAYPA4LV4C3K3WOCY4LANCNFSM6AAAAAAS6AOHEQ> . You are receiving this because you were mentioned.Message ID: ***@***.***>

[cpq]

@sckid1108 baremetal, awesome.
That's what our example is. We don't even use HAL, only CMSIS headers.

[sckid1108]

Hey Gang, I got it working. (Didn't need netif/ethernet.h since ETHERNET header length already defined in TUSB). I assume you guys added DHCP server etc ? (didn't see this in mongoose i originally downloaded, thats why i couldnt get it working) BTW mongoose is now totally *bad ass* and I will be using this instead of LwIP for our projects in the future. Tested on Windows 10 (automagically uses the built-in driver. Attached is my complete build directory. I wouldn't mind doing a STM32L5 (Cortex-M33 version). [image: image.png] [image: image.png] *MEMORY USAGE USING HAL AND USART FOR DEBUG (Debug code build)* [image: image.png] *MEMORY USAGE FOR RELEASE* [image: image.png] mongoose_custom.h #pragma once #include <errno.h> #define MG_ARCH MG_ARCH_NEWLIB #define MG_ENABLE_MIP 1 #define MG_ENABLE_CUSTOM_MILLIS 1 #define MG_IO_SIZE 256 Let me know if you want anything else from me. BTW We use HAL often to get things working during development and to do things like configuration for clocks, IO, etc. Michael Margolese Principal Engineer Tenuvah Designs http://www.tenuvahdesigns.com Phone: (424) 288-9585

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On Mon, Dec 19, 2022 at 1:33 PM Sergey Lyubka ***@***.***> wrote: @sckid1108 <https://github.com/sckid1108> baremetal, awesome. That's what our example is. We don't even use HAL, only CMSIS headers. — Reply to this email directly, view it on GitHub <#1922 (reply in thread)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AYMHAOVHYXYAH2X4FPXMSQ3WODICRANCNFSM6AAAAAAS6AOHEQ> . You are receiving this because you were mentioned.Message ID: ***@***.***>

[cpq]

@sckid1108 awesome, thanks for letting us know!

• DCHP server - yes, the recent change that added that rndis example, also added a simple DHCP server to the network stack.
• netif/ethernet.h - you mention that file is already present: yes and no! it is present if you use LWIP with tinyusb. That file is part of LWIP, basically. If you don't use lwip, then it is not present, that's why we need to add it. I've already filed a PR to tinyusb to get rid of that include: Remove LWIP dependency hathach/tinyusb#1800

Would you be able to share some info about the end product, and specifically - that USB use case, please? The email is support@cesanta.com if you do not want it open to the public.