we have implemented the serial terminal for stm32u575ziq nucleo board when we config UART with DMA fails to transmit data after some time. But when we use UART with interrupt then it works fine Anyone knows why it is happening like that?

[Tesla DeLorean]

Congratulations I guess..​

[Vkris.1]

nice one bro, But I want to know what the possible reason could be why it fails when I use DMA.

[Tesla DeLorean]

Your initial post made a declarative statement.

Not much detail still on code, status or errors reported by the peripherals or HAL.

Would guess relates to ignoring an error, perhaps a noise, framing, under/over run type thing on the reception that needs clearing on the UART side. Perhaps a fault or race condition on the DMA​ side.

Going to need to look at registers and unpack the failing state.​

[Foued_KH]

Hello @Vkris.1​ ,

I recommend you to follow properly the steps as described in this wiki page in the 6.3 UART with DMA

section :Getting started with UART - stm32mcu

Hope my answer helped you!

Foued

[Vkris.1 · Accepted solution]

got the solution it is because of thread priorities.

Thanks for the support 😊