Custom board with imx6dl is based from SABREAUTO RDK board.
I want to control Half-Duplex Mode of RS485 with UART1(ttymxc0).
64.1.1 UART Features of the datasheet described "RS-485 driver direction control via CTS_B signal".
MTXEN485(CTS_B) port set to high when transmit data out, in other case set to low.
Anyway I'm googling this,
normally connect RTS_B to direction control of 485 driver with SER_RS485_ENABLE|SER_RS485_RTS_ON_SEND options.
What is right to connect RS485 driver direction control to CTS_B or RTS_B ?