Firefly Open Source Community

Title: RS485 port does not support serial_rs485? [Print This Page]

Author: EugenyB1    Time: 7/9/2023 07:41
Title: RS485 port does not support serial_rs485?
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.
tchip_askquestions

log.zip

155 Bytes, Down times: 2


Author: 895816514    Time: 7/10/2023 10:31
It is not a clone, these 4 serial ports are isolated on hardware and are independent serial ports.
Author: 895816514    Time: 7/10/2023 10:43
The reply to the forum post may not be timely, you can send the question to my mailbox

email:
hjc@t-chip.com.cn
Author: jackfox849    Time: 1/25/2026 13:28
Truly an impressive article, I¡¯m grateful for your share. With Valid test cram 78202T sheet file, you can access abundant resources free of charge to help you.




Welcome Firefly Open Source Community (https://bbs.t-firefly.com/) Powered by Discuz! X3.1