STM32H753ZI: Ethernet and usb cdc together problem

[Omkar_chandaragi]

Hello guys,

I am using Ethernet and USB together. Ethernet in rmii mode without RTOS  and Using USB as cdc,

after flashing the program it runs normally but  when i ping or Access  the IP from web :spider_web: it goes to hard  fault handler 

If USB init () is Commented then everything is working fine but when uncommented it goes to hard fault handler


so i want the solution to use  USB and Ethernet simultaneously and can  it be used without RTOS or should we use RTOS?

[mƎALLEm]

Hello @Omkar_chandaragi and welcome to the ST community,

USB and Ethernet can be used simultaneously on STM32H7 and can be used without RTOS.

Check if you have issues with memory sharing between both USB and Ethernet. Did you study the memory split between both related software (USB and ETH)?

Read How to debug a HardFault on an Arm® Cortex®-M STM32

[Omkar_chandaragi]

Hello ST team,


I am new to this ,what i want  is  to use ethernet and usb cdc to use simultaneously at a time without RTOS and i have tried with correct memory mappings but still not getting it 

step 1 : i got a output when dcache is disabled and init() functions are in order: this is working 100% 


but this is not a solution right?


so i tried with step2:by referring chatgpt but not getting and not able  to ping it 



i will upload the project file as a zip pls help me out 

[FBL]

Hi @Omkar_chandaragi 

Do you configure USB controller as device or host?

[Omkar_chandaragi]

Hello St team ,

I am using  USB Controller in  fs mode and configured  as Device only and class as Communication Device Class(CDC)


Thankyou

[FBL]

Hi @Omkar_chandaragi 

Please provide full description of your setup , environment ..?  Which CDC class ACM or ECM?