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Difference with DMA between F746ZG and F746IG

Question asked by Jeremy Durand on Mar 28, 2017
Latest reply on Mar 29, 2017 by Jeremy Durand

Hi, 

before receving my new board, I develop application on NUCLEO-F746ZG (at 25 MHz). I use a DMA on RX of USART3 (DMA1 Stream 1 Channel 4). All works fine. When I received new board with STM32F746IG (at 8 MHz), the DMA on RX of USART3 doesn't work. My counter never increment. Of course, I adjust parameters of clock. On USART3, I can transmit and receive by interrupt, but I need to use RX by DMA. All other functionnalites of my application work fine.

If I come back on the NUCLEO-F746ZG (by changing clock configuration), the DMA on RX of USART3 works fine...

Someone can help me?

Thanks in advance!

Jeremy D.

 

I use Keil uVision 5.23, CMSIS 5.0.1, MDK 7.4.0 and DFP 2.9.0.

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