Wrong order of bytes received from serial port

Engineering 🇬🇧
damian177
2021-09-12
2021-09-13

  • damian177 - 2021-09-12

    Hi
    I tried communication with serial port device with SysCom library.
    I was read four bytes like this :

    IF hCom <> RTS_INVALID_HANDLE AND bReadCom THEN
    //Read data
    dwRead := SysComRead(hCom:=hCom,pbyBuffer:=ADR(byteRead), ulSize:=SIZEOF(byteRead), ulTimeout:=100, pResult:=ADR(Result));

END_IF

    I get the bytes but still in bad order. What should I do to get byte in appropriate order?

     

  • damian177 - 2021-09-12

    It is other problem - not a wrong order of bytes. I should wait for all bytes, how do this in above example ?

     

  • damian177 - 2021-09-13

    Any idea?
    when I extend cycle time to 200ms that everything is ok. Do you have any ide how come back to 10ms cycle time and recive all bytes form UART?

     

    Last edit: damian177 2021-09-19

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