michallenc opened a new pull request, #6614: URL: https://github.com/apache/incubator-nuttx/pull/6614
## Summary These three commits add support for RX DMA and RS-485 mode to serial driver. The first commit b66dd73 introduces the support of RS-485. In this mode the hardware automatically sets RTS pin high when data are transfered and low then no transfer occurs.ยจ Commit 5444f06 adds functions sam_dmarxsetup_circular() and sam_dmarxstart_circular() that create API for operating with two or more circular buffers. These functions are used in commit 0f27516 that adds RX DMA support to serial driver. It uses two circular buffers which size can be setup by SAMV7_SERIAL_RXDMA_BUFFER option. The idle bus interrupt is enabled to ensures data are read even if the buffer is not yet full. The timeout can be setup by SAMV7_SERIAL_DMA_TIMEOUT option. Only RX DMA is supported so far. ## Impact SAMV7 only. Serial driver and DMA driver only. ## Testing Tested on SAME70-XPLAINED board and custom board with the SAME70 MCU.. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: commits-unsubscr...@nuttx.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org
