How To Stream Data From A USB (Com Port) Win32

This is a discussion on How To Stream Data From A USB (Com Port) Win32 within the C++ Programming forums, part of the General Programming Boards category; Can someone please show me an example of how to stream data from a usb device (through com port)? I ...

  1. #1
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    How To Stream Data From A USB (Com Port) Win32

    Can someone please show me an example of how to stream data from a usb device (through com port)? I saw some managed examples that wont help much in a win32 and a few examples that did not work. Thanks in advance

  2. #2
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    what are you trying to do exactly? capture usb traffic? I think they make data loggers for that. I think trying to do it in real time with a serial port is a waste of time, because even the slowest usb port is ~100 times faster than the fastest typical serial port.
    Code:
    namespace life
    {
        const bool change = true;
    }

  3. #3
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    I bought a usb GPS and there is serial data coming from it (com3). How do I extract the information from it?

  4. #4
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    Exactly the same as a regular COM port. Post some code and error messages if that doesn't work.

  5. #5
    Registered User Codeplug's Avatar
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    Here is my awesome serial I/O class for all to enjoy:

    Code:
    #include "Win32Serial.h"
    
    #include <iostream>
    #include <iomanip>
    #include <cctype>
    using namespace std;
    
    using namespace Win32Serial;
     
    int main()
    {
        CWin32Serial com3;
    
        if (!com3.Open(3, CBR_115200, 'N', 8, 1, FC_Disabled))
        {
            cerr << "Failed to open COM3, ec = " << GetLastError() << endl;
            return 1;
        }//if
    
        BYTE b;
        while (com3.ReadByte(b))
        {
            int c = (unsigned)b;
    
            if (c == '\r' || c == '\n')
                cout << endl;
            else if (!isprint(c))
                cout << "." << flush;
            else
                cout << (char)c << flush;
        }//while
    
        return 0;
    }//main
    gg
    Attached Files Attached Files

  6. #6
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    Quote Originally Posted by Codeplug View Post
    Code:
    if (!com3.Open(3, CBR_115200, 'N', 8, 1, FC_Disabled))
    may I suggest that, instead of passing a literal 'N' character for the parity bit, why not define an enum with PARITY_NONE, PARITY_EVEN, and PARITY_ODD values? I think it would make the code more clear.
    Code:
    namespace life
    {
        const bool change = true;
    }

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