How to use DMA1 in STM32F4xx controllers?

Question

STM

While solving my problem of improving the performance of the algorithm, I
came across such a strange effect

. Reading data from GPIO through DMA2 - works, but through DMA1 - no.
It turned out that I was not the only one who stumbled over this. Found another one like this.

https://electronics.stackexchange.com/questions/29...

After thinking a little about this situation, about the answer of a colleague to the question
, I got the feeling that the DMA1 controller is not applicable at all.
memory to memory does not work for him. STM writes this in the documentation
and the memory-periphery is not divorced, according to the BusMatrix picture and the answer to this post.
What's left?

Has anyone managed to use DMA1 on STM32F405/407/415/417?
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