Ethernetif.c in STM32f4 cube FW_F4 V1.28

[######]

Hello,

I've read several forum posts commenting on the STM32 HAL management of LWIP, particularly ethernetif.c and trying to understand the interrupt driven zero copy examples. For reference in my application I do not use RTOS.

After updating cube, and comparing my previous project version (based on FW_F4 V1.26.2) that the ethernetif.c  file has changed quite significantly. I assume this is in reaction to feedback from users in forum posts such as this detailed post https://community.st.com/t5/stm32-mcus-embedded-software/how-to-make-ethernet-and-lwip-working-on-stm32/td-p/261456

The above mentions drivers being reworked following V1.27. And comments on problems such as [in reworked drivers].

Could someone comment on whether the ethernetif.c in FW_F4 V1.28 rectifies the problems and criticism's that have been previously discussed across the forum?

Alternatively, if the ethernetif.c is still a poor implementation, is it possible to comment on what has not been addressed (specifically to non-RTOS usage)? 

Thanks.

[LCE]

I think the "problematic" parts are the HAL_ETH_* functions.

I started with ethernet on a F7 when HAL_ETH was blocking & copy only, so I wrote my own driver with direct register access, stealing a lot from others who did that before me.

Definitely helps to understand, makes debugging easier.

Anyway, then came the new HAL_ETH, it looked partly too complicated / complex for me (Piranha likes to call it "bloated"), so I kept my own, also porting that to H7 (which was terrible because completely different).

[######]

Thanks. Writing my own at a lower level is the aim. Mainly to develop my understanding but also for maintenance going forward.

Any links to "good" resources would be appreciated. 

[STea]

Hello @###### ,

The new reworked version rectifies the problems and criticism's that have been previously discussed across the forum as well as other problems related to the driver rectified internally .

we will be happy to help you with any problems related to this software release and we are grateful for you continuous feedback helping us fine tune our solution .

BR

[LCE · Accepted solution]

> Any links to "good" resources would be appreciated. 

These are held quite simple:

https://github.com/lsgunth/lwip_contrib/blob/master/ports/stm32f2x7/netif/stif.c

https://oryx-embedded.com/doc/stm32h7xx__eth__driver_8c_source.html

Basically, I just used some of their basic ideas and tried to keep things as simple and short as possible. Which it is not at all... :grinning_face_with_sweat:

My ethernetif.c file holds all IO functions linking to my sources and LWIP, no OS, with about 2000 lines of code, comments excluded.
But no more HAL_ETH.