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Posted to commits@nuttx.apache.org by GitBox <gi...@apache.org> on 2021/05/06 09:52:49 UTC

[GitHub] [incubator-nuttx] davids5 edited a comment on pull request #3633: drivers/serial: fix Rx interrupt enable for cdcacm

davids5 edited a comment on pull request #3633:
URL: https://github.com/apache/incubator-nuttx/pull/3633#issuecomment-833395039


   @xiaoxiang781216 - would you please have a look at the changes here. The issues is that DMA is per port by TX or RX. So all 4 permutations (NO DMA, RX & TX DMA, RX Only DMA or TX Only DMA) can be enabled on different ports in the low level drivers by port.
   
   So U[S]ART1 may have RX & TX DMA and U[S]ART2 may have NO DMA. and CONFIG_SERIAL_RXDMA will be lit and then the proper functions are not called on the ports not using DMA.
   
   


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