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UART4 DMA on K66

Question asked by Alexandru Stefan on May 15, 2018
Latest reply on May 16, 2018 by Alexandru Stefan

Hi,

 

Am using a Kinetis K66 on a custom board where the UART we want to use is routed to PTC14 and PTC15 (UART4). Data is transmitted asynchronously, so it means both TX and RX could be active at the same time. While writing the firmware I noticed that DMA only has one trigger source for UART4 that's common for both TX and RX. I am not very experienced with DMA, but from my understanding of things, I won't be able to receive data at the same time as I'm sending it, presuming I use DMA for both TX and RX. Any way I could get around this?

 

Thank you,

Alex

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