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TIM1 DMA2 Request while in DMA Memory-Memory mode

Question asked by muffin on Mar 30, 2015
Latest reply on Apr 2, 2015 by bo.riccardo
Hello friends,

I'm messing around with the f4 discovery trying to get Timer 1 to send a DMA transfer request to DMA2, which would transfer a whole GPIO input register (GPIOx_IDR) to somewhere in memory.

I was able to enable the transfers myself by setting the EN bit in  DMA_SxCR during a timer interrupt, but that's too slow for my application.  I'd like to transfer the GPIO input register into memory at around 20MHz, which means no software control of the DMA.

Am I trying to do the impossible?