How to make lwip tx rx buffers non cacheble

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Always include your chip part number when asking a question.

You can use HAL_MPU_ConfigRegion to disable cache for a memory range.

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RBGAuthor

Associate III

STM32F767.

If caches are enabled tcpip msg fetch is not working so need to make lwip rx tx buffers as non cacheable

Did you read the second part of my message?

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You will need to make the buffers aligned to cache line boundaries, but they don't need to be located anywhere in particular.

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RBGAuthor

Associate III

Can we make those buffers non cacheable.

Yes, by using HAL_MPU_ConfigRegion. We're going in circles here. I'm not going to write the code for you for free. Maybe someone else will.

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RBGAuthor

Associate III

I just wanted to know which are the buffers I need to make non cacheabpe in lwip

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