Hard fault while sending huge data through ethernet

[utkarshchaurasiya36]

"We are facing a hard fault issue in our code when sending a large amount of data. Occasionally, it runs properly, but most of the time, it goes into a hard fault after sending approximately 10,000 bytes. The image data we are sending is around 40 KB. Interestingly, sending 'Hello World' in a loop works successfully without any faults. I have also tried increasing the lwIP options sizes through a trial-and-error approach, but the issue persists. I have been struggling with this problem for the past 20 days and have not been able to resolve it. I am using the STM32H723VGT6 microcontroller. Please help me resolve this issue."

[Andrew Neil]

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@utkarshchaurasiya36 wrote:

I have been struggling with this problem for the past 20 days and have not been able to resolve it.

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So what have you tried in those 20 days?

What have you discovered?

Debugging 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

LwIP Debugging:

https://community.st.com/t5/stm32-mcus/using-the-itm-console-for-printf-redirects-and-lwip-debug/ta-p/723472

PS:

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@utkarshchaurasiya36 wrote:

Occasionally, it runs properly, but most of the time, it goes into a hard fault after sending approximately 10,000 bytes.."

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If it does work occasionally, that could suggest a timing issue somewhere...
 

Some general debugging tips:

https://community.st.com/t5/community-guidelines/how-to-write-your-question-to-maximize-your-chances-to-find-a/tac-p/706966/highlight/true#M49