On Jetson NX for Uart1, there is RTS and CTS pin, I want use uart1 as rs485/rs422 port, I add a voltage trancfer, Then I want set uart1 to 422/232 mode. [image] Test code: #ifndef SER_RS485_TERMINATE_BUS #define SER_RS485_TERMINATE_BUS (1 << 5) #endif #define SET_UART_RTS_ACTIVE_LOGIC(flags, …

for error"tiocsrs485 inappropriate ioctl for device", it was because the driver from nvidia didn’t contains RS485 mode, need add them self…

Jetson NX uart1,I want use uart1 as rs422 ,FullDuplex-Mode, Meet error 'TIOCSRS485:Inappropriate ioctl for device'

Robotics & Edge Computing Jetson & Embedded Systems Jetson Xavier NX

JerryChang August 25, 2021, 8:53am 4

hello 411203060,

please also refer to similar discussion thread, Topic 124848 for RS485 configuration.
you should also refer to post #9 to force the pin as low state for testing,
thanks

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Jetson NX uart1,I want use uart1 as rs422 ,FullDuplex-Mode, Meet error 'TIOCSRS485:Inappropriate ioctl for device'

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