danielappiagyei-bc commented on code in PR #10911:
URL: https://github.com/apache/nuttx/pull/10911#discussion_r1360098848


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arch/arm/src/imxrt/imxrt_serial.c:
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@@ -60,6 +60,24 @@
 
 #ifdef USE_SERIALDRIVER
 
+#if defined(SERIAL_HAVE_TXDMA)

Review Comment:
   totally agree. I just found myself using a single lpuart device with DMA for 
the first time and it wasn't obvious to me why dma wasn't working properly (no 
transfers were occurring) until I stumbled upon the fact that you need to set 
`CONFIG_IMXRT_EDMA_NTCD` appropriately. I wasn't sure of a better way to 
communicate this to the user and was hoping these compile-time checks would 
help at least a few people :) 



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