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MK64 SPI DMA  Receive in Master mode - Impossible?

Question asked by Eyal Doron on Aug 17, 2015
Latest reply on Oct 15, 2015 by Eyal Doron

In the K64, SPI1 and SPI2 have only a single DMA trigger source. As far as I can see, this means you can't operate both a transmit and a receive DMA at the same time. In particular, this means that a DMA receive in Master mode is impossible, since it always requires a transmit channel. Is this true? It seems like a significant step back from, say, the K60, where all SPI channels have separate TX and RX DMA triggers.

Any workaround, except to use polling or interrupts?

 

Thanks,

Eyal Doron

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