DMA issue stop1

[mve]

For my project I am using the LPUART on an STM32U545 and 585, currently I am using the normal GPDMA and this works like a charm in normal run mode. However I want to be in STOP1 and receive UART communication. As per the reference manual the GPDMA is active when clocked. But when I clock the DMA in stop it still does not work and I get overrun issues.

When changing to the LPDMA with the same settings I get no data whatsoever.

DMA settings:

What settings do I have to change to have the LPUART use the DMA in STOP1 and wake up when the transfer is complete?

 

[Sarra.S]

Hello @mve, 

Yes, the GPDMA is fully functional in stop1  

Refer to the paragraph: Continuous communication using DMA and LPUART in the RM0456