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

[xinliwang]

Hi @yipingwang 

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

LS1028ARDB 

[yipingwang · Accepted solution]

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.