RS485 port does not support serial_rs485?

EugenyB1 · Posted at 7/9/2023 07:41:44

Last edited by EugenyB1 In 7/9/2023 07:43 Editor

Device=iHC-3308GW. I have built firmware using your official instructions. My application gives errno 25 'Inappropriate ioctl for device' for setting ttysWK0 and ttysWK1 ports with serial_rs485 using TIOCSRS485 IOCTL. Is RS-485 a true genuine RS-485 port, or some clone of RS-232 to RS-485 conversion without proper transmitter control? I am interested in setting delay_rts_before_send and delay_rts_after_send.

895816514 · Posted at 7/10/2023 10:31:40

It is not a clone, these 4 serial ports are isolated on hardware and are independent serial ports.

895816514 · Posted at 7/10/2023 10:43:10

The reply to the forum post may not be timely, you can send the question to my mailbox

email:
hjc@t-chip.com.cn

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[Linux] RS485 port does not support serial_rs485?

【Linux】 RS485 port does not support serial_rs485?