Why cant i write into mem 0x40026410?

[Javier1]

stm32f207zg (nucleo-f207zg)

Hi, im trying to write into my DMA2 Stream0 CR register (mapped as 0x40026410).

But that memory addr cannot be written not with my init code nor manually trough the STM32IDE debugging tools .

Is there any memory protection or lock i am missing?

[Bruno_ST · Accepted solution]

Hello @Javier Muñoz​ 

Just a basic question: Did you enable the DMA2 clock ? (RCC_AHB1ENR bit 22) ?

(or call corresponding HAL/LL to do it)

BR,

Bruno

[Javier1]

Howdy @Bruno_ST​ 

Ding ding ding!, that was it.

Im using autogenerated CUBEMX code.

It looks like CubeMX places ADCDMA config after the DMA clock is enabled (RCC->AHB1ENR), so thats why it wasnt working

If i move the MX_DMA_Init before the ADC init everything works