#Qt serial port rs485 driver

#Qt serial port rs485 driver

I succeeded to implement it based on kernel /dev/spidev0.0 only to find out that even this partially system driver supported solution is too slow for even 19 200 Bd speed (loosing about 5 characters on one received). Do not try to implement communication with MAX3140 UART chip yourself (maybe except of asm based implementation, what is however most probably unnecessary exertion).Getting back to document conclusions of my research on best practice of using RaspiComm RS-485 under Qt for anybody, who finds this thread useful (I expect many of it is valid for RS-232 on same board as well, did not test myself):

Is there something in Qt (ready or WIP) about this (not to re-invent wheel) or is there some design skeleton/advice allowing eventually later extend QtSerialPort by this 'device'? (I am willing to contribute, should my development be evaluated as worth it.). Now I intend to develop some object for accessing RS-485 UART on RaspComm board (which is itself driven via SPI).

SPI has same basic characteristics like serial port (baud rate, parity.) and even (kind of) asynchronous in/out driven by kernel device so this is why I expected same object could manage them both. (I am able to workaround based on QFile of course, however I would love to do things Qt way ).). What to do to make /dev/spidev0.0 appear in the list? Any clues and advices heartily welcome. I guess I can not (simply) use QSerialPort constructor with '/dev/spidev0.0' parameter before 'somehow' getting /dev/spidev0.0 accepted by QSerialPortInfo. Looks like your connection to Qt Forum was lost, please wait while we try to reconnect.Дid anybody make QSerialPort(Info) work on /dev/spidev* kernel driver? I have running (visible, configured, operable via spidev_test.c) /dev/spidev0.0, however QSerialPortInfo::availablePorts returns list with just one member, for /dev/ttyAMA0.

QextSerialPort add new BaudRate QextSerialPort add new BaudRate. Hey, I want to add the '691200' and '921600' baud rate to the Qextserialport baud rates list.