Ethernet frame sent twice when using stm32f7xx_hal_eth driver.

[khaaal]

Hello,

So I've been trying to send a raw ethernet frame using only stm32f7 hal ethernet driver without LWIP. The frame is sent, however it is always sent with a duplicate. I need to send only one frame.

Is there a solution for this ?

Thanks.

[khaaal]

Nevermind, the problem was in ETH_TXBUFNB  it was set to one instead of four.

[Piranha]

This means that the code is failing when all descriptors are used. It will happen with any number of descriptors when software is sending faster than hardware.