On 29/01/2021 12:01, Robin Müller wrote:

The HAL_ETH_Transmit call just times out. If I set the timeout to 20 to HAL_MAX_DELAY, the function will just block indefinitely.
Does anyone have an idea why this might happen?
I would check the memory settings in the MPU for this area. You probably need some sort of device memory (uncached).

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