Why cant i write into mem 0x40026410?

Javier1 · ‎2021-11-04

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?

Available for consulting/freelancing , hit me up in https://github.com/javiBajoCero

Bruno_ST · ‎2021-11-04

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

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Bruno_ST · ‎2021-11-04

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

To give better visibility on the answered topics, please click on Accept as Solution on the reply which solved your issue or answered your question.

Javier1 · ‎2021-11-04

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

Available for consulting/freelancing , hit me up in https://github.com/javiBajoCero