STM32H735 with Ethernet & LAN8710A PHY

dacha.1 · ‎2025-06-16

Hello

I am triyng to use STM32H735 with ethernet (ln8710A is the PHY)
We have hardware fault when we connect the cable (se the itm print below)
We use CubeMx version Version: 1.18.0
ETH is in RMII conection is OK

Andrew Neil · ‎2025-06-16

Welcome to the forum.

Presumably, this is custom hardware?

Therefore, please post your schematic. Also what tools, middleware, versions, etc

See: How to write your question to maximize your chances to find a solution

@dacha.1 wrote:
We have hardware fault when we connect the cable (se the itm print below)

How to debug Hard Faults:

https://community.st.com/t5/community-guidelines/how-to-write-your-question-to-maximize-your-chances-to-find-a/tac-p/708193/highlight/true#M51

PS:

@dacha.1 wrote:
ln8710A is the PHY

Did you mean LAN8710A ?

https://www.microchip.com/en-us/product/lan8710a

A complex system that works is invariably found to have evolved from a simple system that worked.
A complex system designed from scratch never works and cannot be patched up to make it work.

dacha.1 · ‎2025-06-16

the hardware is good
we have test many configurations for memory position for Rx Tx and LwiRamHeap

In certain conditions hi dont remember its , I succeeded to ping my board , but
after several try of ping we have hardware fault

We think that it was bad configuration for Rx Tx and the heap description .

Can you help me to fit the good comfiguration

Andrew Neil · ‎2025-06-16

Note that it's a "Hard Fault" - which is not necessarily a hardware issue.

https://developer.arm.com/documentation/dui0552/a/the-cortex-m3-processor/fault-handling

Again, see how to debug Hard Faults:

https://community.st.com/t5/community-guidelines/how-to-write-your-question-to-maximize-your-chances-to-find-a/tac-p/708193/highlight/true#M51

And did you mean LAN8710A ?

https://www.microchip.com/en-us/product/lan8710a

A complex system that works is invariably found to have evolved from a simple system that worked.
A complex system designed from scratch never works and cannot be patched up to make it work.

dacha.1 · ‎2025-06-16

Now the stack is running

When we try to ping the board the response is OK

C:\Users>ping 192.0.1.218 -t

Envoi d’une requête 'Ping' 192.0.1.218 avec 32 octets de données :
Réponse de 192.0.1.218 : octets=32 temps<1ms TTL=255
Réponse de 192.0.1.218 : octets=32 temps<1ms TTL=255
......................................

but we have DMAErrorCode=0x4080 ? why ?

dacha.1 · ‎2025-06-17

Duplicate - merged.

Hello

I’m using an STM32H735VGT6 with the PHY LAN8710, the hardware of the board is working.

I managed to generate a ping to the IP address: 182.00.01.228.

the configuration was :

Ethernet :

Lwip

When we connect the cable hard fault :

Nota : this project have been worked one night whithout probleme ,We dont understand .

We have not modified anythink and then he dont work ???

Is some one have develop an ethernet project with the stm32h735...

Please help

Andrew Neil · ‎2025-06-17

So have you tried to debug your Hard Fault?

Again, see:

https://community.st.com/t5/community-guidelines/how-to-write-your-question-to-maximize-your-chances-to-find-a/tac-p/708193/highlight/true#M51