How to force the UART0_RTS pin as low state

[Xzz]

Thanks fo your reply,
We want to use RTS to control rs485 devices. And the hardware need rts opposite state.

@Xzz

I want to contrl S485 RTS with software, and RTS should be high when send data.

What’s more , I found the same topic, but the patch do not work for me.

@JerryChang

could you please try below to force the pin as low state.
for example,

I guess this is not a issue, but our hardware requires the opposite state. And I dont know how to change RTS .