STM32F4 DMA registers are unwritable?

[kurta999]

Hi,

I'm trying to make UART DMA to work on F4, but looks like DMA registers are unwritable?

LL functions for DMA stream does totally nothing, so I tried this and the result is 0 if I read CR register.

DMA1_Stream2->CR = 1;

https://kepkuldes.com/images/029d362fe97e6549ffe175068a0bb758.png

Did I miss something, or why this happens? On L4 everything worked well.

[waclawek.jan]

Enable DMA clock in RCC.

JW

[kurta999]

omg, thank you!​