I'm using SMT32F429.
I want to move 32 bit data from memory into GPIOx_BSRR by DMA and use a timer as trigger.
I tried to setup DMA1 Stream 4 channel 1 (TIM7_UP). And I setup Timer7. But I end upp getting Stream 4 transfer error interrupt flag set. DMA_SxNDTR only counts down one time.
And now I read that it is only DMA2 that can write to GPIO registers. Can this be why I fail? Where can I confirm that informaton?