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Trigger multiple DMA transfers?

Question asked by nunes.ricardo on Jun 23, 2016
Latest reply on Jun 23, 2016 by FTITI.Walid
I'm using STM32F446. I'm working in a project with 3 SPI in master mode and SDIO. Ideally I would want to have every communications using DMA, but I have some questions I can't answer by reading the manual:

  1. Having 2 DMA controllers means that I can have 2 independent DMA transfers occurring at the same time without any collision?
  3. Let's say that I trigger 2 DMA transfers in the same controller, at the same time: 1 for SPI (highest priority) and the other for SDIO (lowest priority). Does that mean that both of them will happen at the same time, but when SPI needs to load a new value SDIO will have to wait? Does SDIO transfer loose any value because of it?