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SPI bi-direction DMA

Question asked by yli on Jun 27, 2014
Latest reply on Jul 2, 2014 by MaheshN

Hi,

 

I understand that there is only one DMA channel on the 214xx SPI. My question is, can I flip the DMA direction in the ISR and let the DMA alternate between transmitting and receiving? Will there be penalty or latency associated with flipping the DMA direction?

 

I am using SPIB in slave mode, if it matters.

 

Thanks

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