esp_tinyusb port ECM/RNDIS supprt (IEC-176) (IEC-178)

[chegewara]

Answers checklist.

• I have read the documentation of the component in question and the issue is not addressed there.
• I have searched the issue tracker for a similar issue and not found a similar issue.

General issue report

Hi,
quick test with USB-NCM shows it is working, but there is problem with ECM/RNDIS. (v1.4.5)
According to changelog ECM/RNDIS support should be added:

## 1.1.0

- Added support for NCM, ECM/RNDIS, DFU and Bluetooth TinyUSB drivers https://github.com/espressif/idf-extra-components/commit/79f35c9b047b583080f93a63310e2ee7d82ef17b

but only NCM is enabled in CMakeLists

if(CONFIG_TINYUSB_NET_MODE_NCM)
    list(APPEND srcs
         tinyusb_net.c
         )
endif() # CONFIG_TINYUSB_NET_MODE_NCM

When trying to build with ECM enabled in menuconfig i get many (10) undefined reference to errors.

Thanks

BTW NCM is using different callback than ECM, so the init_cb callback on NCM is not working (no big issue)

tud_network_link_state_cb <--- NCM
tud_network_init_cb <--- ECM/RNDIS

[tore-espressif]

@chegewara Thank you very much for trying this out.

The engineer who mainly worked on this left some work unfinished, ie here we wanted to remove support for ECM/RNDIS because it was never implemented in esp_tinyusb in a first place espressif/idf-extra-components#235

ATM, we want to upgrade to TinyUSB v0.17 which contains refactored NCM driver, if it works OK, we don't plan to implement ECM/RNDIS mainly because of maintenance cost

[chegewara]

That's sad there is no plan to add ECM, because NCM is not supported on android.

I hope espressif don't plan to remove current ECM code, so maybe community will expand it (maybe I will try to work on it, if it's not a problem).

Thanks for good work on USB

Btw I think RNDIS is supported in tinyusb

[emaayan]

so essentially this means i cannot make esp usb look like ethernet card to windows right? cause that only works with rndis

[tore-espressif]

so essentially this means i cannot make esp usb look like ethernet card to windows right? cause that only works with rndis

Could you please try the attached instructions? It works OK on my Win10 machine
win10-native-ncm.pdf