SPI with DMA

[docwelch]

I have SPI (polling mode) working well but am trying to get it working with DMA. I am using software to set the NSS (chip select). Obviously, I set it low and then call HAL_SPI_Transmit_DMA(). My question is where is the best place to set NSS back high? (In polling mode, I just set it high after calling HAL_SPI_Transmit()). Would you set it in the Calback (HAL_SPI_TxCpltCallback()) or somewhere else?

Really finding your book helpful – thanks for writing it and for your time considering my question

Steven

[Carmine Noviello]

Well, it depends on how your code is organized but the callback is likely the right place to set the NSS high.

[docwelch]

Thanks for your help!

[Author]

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