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【Linux】 RS485 port does not support serial_rs485?

Posted at 7/9/2023 07:41:44 View：1233 | Replies：2 Print [Copy Link] 1^#

Type: Self-Compiled Firmware
SDK Package Name: Buildroot 20221212
Last Commit: 0000-00-00 00:00:00
Modification Content: my package
Log: log.zip

Problem description and steps to reproduce:

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.

log.zip

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[Linux] RS485 port does not support serial_rs485?

【Linux】 RS485 port does not support serial_rs485?