How to use LwIP + LAN8720 +STM32F4

[Murad]

Originally a reply to https://community.st.com/t5/stm32cubemx-mcus/lwip-lan8720/m-p/690602 but needs a new thread

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How do i manually add file C and file H ??

[Andrew Neil]

You haven't said what IDE you're using but, for STM32CubeIDE:

1. copy the .c file into a folder in your project which already has source files;
2. copy the .h file into a folder in your project which already has header files.

(depending on how your project is set up, those could be the same folder)

[Murad]

I am using STM32CubeIDE. need to add in Core>Inc and Core> Src  ???

Lwip Should be enabled or disabled??

[Murad]

Sorry for so many questions, as I am just starting to work with stm32 controllers and practicing

[Andrew Neil]

Ethernet is really not a beginner's project - you should probably start with some more basic projects to get familiar with the tools...

https://www.youtube.com/watch?v=gL8OoS9E1rw&list=PLnMKNibPkDnFCosVVv98U5dCulE6T3Iy8

EDIT:

You also haven't said what STM32 you're using, what hardware, etc.

Again, please see the Posting Tips:

https://community.st.com/t5/community-guidelines/how-to-write-your-question-to-maximize-your-chances-to-find-a/ta-p/575228

PS:

Try a search in the Knowledge Base; eg,

https://community.st.com/t5/stm32-mcus/how-to-use-the-lwip-ethernet-middleware-on-the-stm32h5-series/ta-p/691100?search-action-id=38526787183&search-result-uid=691100

Also, as previously noted, LwIP is a widely-used independent 3rd-party project - so a general web search should find a lot...

https://savannah.nongnu.org/projects/lwip/ 

[Murad]

I am using STM32F407VGT6.   ETH mode: RMII. 

PA1	ETH_REF_CLK	n/a	Alternate Function Push Pull	No pull-up and no pull-down	Very High		false
PA2	ETH_MDIO	n/a	Alternate Function Push Pull	Pull-up	Very High		true
PA7	ETH_CRS_DV	n/a	Alternate Function Push Pull	No pull-up and no pull-down	Very High		false
PB11	ETH_TX_EN	n/a	Alternate Function Push Pull	No pull-up and no pull-down	Very High		false
PB12	ETH_TXD0	n/a	Alternate Function Push Pull	No pull-up and no pull-down	Very High		false
PB13	ETH_TXD1	n/a	Alternate Function Push Pull	No pull-up and no pull-down	Very High		false
PC1	ETH_MDC	n/a	Alternate Function Push Pull	Pull-up	Very High		true
PC4	ETH_RXD0	n/a	Alternate Function Push Pull	No pull-up and no pull-down	Very High		false
PC5	ETH_RXD1	n/a	Alternate Function Push Pull	No pull-up and no pull-down	Very High		false

Also I activate RCC_MCO_1  -- 25Mhz.

[Andrew Neil]

Is that a commercial board, or your own custom design?

[Murad]

My custom design

[Pavel A.]

Hi Murad,

The CubeMX and the libraries offered in the "Software pack" have evolved since I've last time dealt with ETH and LwIP. Maybe there's a new straight method now to change the PHY. I'd still do this in the old way, simply because this is easier for me. The changes for the PHY will be in LwIP/Target/ethernetif.c and the original files for the PHY are under Drivers/BSP.  Basically you just find all calls to the PHY module in ethernetif.c and replace by similar calls in the actual C file (lan8720_driver.c or whatever) and replace the PHY .h file to the corresponding new .h. Then remove the c,h files for the old PHY and copy the new PHY files in your project. Just copy both .c and .h files in the same directory with your ethernetif.c and add to the project. Only ethernetif.c will use it, so no reason to be fancy. 

Compile and fix errors. That will be the easy part.

The hard part is to debug and verify that the new PHY routines are actually called and do what they should.

Good luck.