STM32F4 Ethernet Support

#1

Hi,
I am looking at using the PX4 middleware without the flight-stack on a Nucleo-F429ZI board.

I have created a target board definition and added another ROMFS configuration which has an rc$ file which does a bare minimum to bringup uorb and parameters etc.
This is all working well.

I would like to use ethernet for some UDP communications. Unfortunately I cannot get this to work with PX4 and this hardware. It builds and uploads fine. However, I can’t establish connectivity with ping etc.

I have been able to use a plain version of nuttx with this hardware to successfully use ping and telnet daemons.

I have been able to hack around the av/x-v1 board configuration to run on Nucleo-F767ZI hardware. Again, this allowed me to successfully use ping and telnet daemons, this time within PX4. Unfortunately, this is a different chip target (STM32F7).

I have started to look at the differences between the new nuttx code and what is used in PX4 as it relates to this target (STM32) and network code. I can’t see any significant differences.

Does anyone have any ideas why ethernet should not work with STM32 targets when it does work on STM32F7 targets?

I am still trying to debug this, but I thought someone more familiar might know whats going on.

I appreciate I have left a lot of details regarding the exact configuration etc, I can provide this kind of info if it helps.

Thanks.

#2

Ok, it turns out that ethernet works perfectly fine on the STM32 when you don’t accidentally initialise SPI2 SCK on the same pin as RMII_TXD1_1.

#3

@Dino_Mani you might be able to comment here.

#4

Thanks Julian, I have managed to get this working. The problem was in my board configuration.

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