CubeMX USART1 with DMA, LL driver inits DMA streams before enabling DMA CLK

[PÖste.1]

I have had a problem getting DMA TX for USART1 to work, no errors, stream gets enabled nut nothing is transferred, stream never complets. I am using LL driver for USART1.

I finally found the problem is that generated usart.c code inits DMA without enabling the CLK. Init of DMA is done after USART1. Eventually I found the "hidden" up/down arrows in CubeMX (scroll down the window) and could move call to MX_DMA_Init() up before other peripherals.

I am note sure if CubeMX is supposed to leave such detals to the user - I would not misssed it not using CubeMX but one assumes CubeMX has the brains to handle this dependency, or?

I have CubeMX 5.4.0 and STM32F413 MCU.

[PHryn]

I can confirm this bug on stm32g4.

MX_DMA_Init should be right after MX_GPIO_Init.

Propably it can affect all cubemx dma code generator.

Regards,

Pawel

[Amel NASRI]

Hello,

Similar problems are already tracked in https://community.st.com/s/question/0D50X0000Bmob3uSQA.

The fix will be available in next STM32CubeMX release.

Best Regards,

Amel