About SMika.1

SMika.1 · 2022-02-16

Hi, I'm trying to communicate with multiple spi slave sensors using STM32F401.I need to access the sensors many times in 1ms period, so I want to drive SPI1 and SPI2 in parallel.I set SPI1 and SPI2 to use DMA, then called, HAL_SPI_TransmitReceive_DMA...

SMika.1 · 2022-02-17

Thank you TDK.I think your idea is good. Unfortunately, my pcb board doesn't have connection between two SPI pins. I'll try in future.

SMika.1 · 2022-02-17

Thank you KnarfB. I tried again, and I found both SPI can output sclk simultaneusly with 5usec delay, as you commented. In my application, one transmit transaction spends 4usec, so, I couldn't notice two SPI worked in parallel.

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Can STM32F4 communicate with multiple spi slave devices parallely?

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