RS485:How to set a customize rts handler

[HarryChen001]

i dont know how to set a rts handle when i using rs485 device

[Hualin-AUG]

Also here. When working with an RS485 and need to set an RTS handler, there is no way there. I see there is an RS485 config, but inside that, it does not provide a pin number or customize the RTS handler