Layerscape中的主题 HOW to enable UART flow control (RTS/CTS) on UART2 for LS1028

HOW to enable UART flow control (RTS/CTS) on UART2 for LS1028

xinliwang — Fri, 17 Oct 2025 07:42:51 GMT

I am using an LS1028 board and want to use UART2 for RS485, but I cannot find the RTS pin. How can I use RTS for automatic direction switching?

Thanks

Re: HOW to enable UART flow control (RTS/CTS) on UART2 for LS1028

yipingwang — Mon, 27 Oct 2025 07:30:32 GMT

The LS1028A SoC includes two DUARTs (UART1 and UART2) and six LPUARTs. RTS/CTS hardware flow control is supported only on LPUART1-LPUART6, not on the DUARTs (UART1 and UART2). They only provide TX and RX pins. For RS485 automatic direction control, you can use anyone of the LPUARTn_RTS pin.