DMA configuration on Nucleo144 (GPIOs to Memory)

[Arkady Pann]

Posted on July 09, 2018 at 22:43

Hi,

I am trying to find some example for DMA configuration on Nucleo144 (STM32H743ZITx).

A DMA should transfer data from GPIO port pins to memory by SYNC signal provided by external clock (EXTI2).

Did not find something helpful in documentation or in Cube....

Appreciate your help!

Arkady

[waclawek.jan]

Posted on July 10, 2018 at 10:08

Forget about EXTI, for this purpose it's not usable

See AN4666.

In your case, instead of output compare, use input capture to provide the DMA trigger.

JW

[Arkady Pann]

Posted on July 12, 2018 at 22:13

Thanks Jan!

indeed I tried to use Discovery example refereed by 

AN4666.

It is not simple. When porting to STM32H734, GNU compiler start pointing to some irrational errors and conflicts. Not trivial to solve.

Of course, I can continue and fight with this example, but it would be nice to have something ready for Nucleo (

STM32H734).

Appreciate your help.

Atkady