Function main

examples/serial_stream_write.cpp:17–86

* @brief This example reads the contents of a file and writes the entire * file to the serial port one character at a time. To use this * example, simply utilize TestFile.txt or another file of your * choosing as a command line argument. */

 *        choosing as a command line argument.
 */
int main(int argc, char** argv)
{
    using namespace LibSerial ;
    // Determine if an appropriate number of arguments has been provided.
    if (argc < 2)
    {
        // Error message to the user.
        std::cerr << "Usage: " << argv[0] << " <filename>" << std::endl ;

        // Exit the program if no input file argument has been given.
        return 1 ;
    }

    // Open the input file for reading. 
    std::ifstream input_file(argv[1]) ;

    // Determine if the input file argument is valid to read data from.
    if (!input_file.good()) 
    {
        std::cerr << "Error: Could not open file "
                  << argv[1] << " for reading." << std::endl ;
        return 1 ;
    }

    // Instantiate a SerialStream object.
    SerialStream serial_stream ;

    // Open the Serial Port at the desired hardware port.
    serial_stream.Open("/dev/ttyUSB1") ;

    // Set the baud rate of the serial port.
    serial_stream.SetBaudRate(BaudRate::BAUD_115200) ;

    // Set the number of data bits.
    serial_stream.SetCharacterSize(CharacterSize::CHAR_SIZE_8) ;

    // Turn off hardware flow control.
    serial_stream.SetFlowControl(FlowControl::FLOW_CONTROL_NONE) ;

    // Disable parity.
    serial_stream.SetParity(Parity::PARITY_NONE) ;

    // Set the number of stop bits.
    serial_stream.SetStopBits(StopBits::STOP_BITS_1) ;

    // Read characters from the input file and write them to the serial port. 
    std::cout << "Writing input file contents to the serial port." << std::endl ;
    
    // Create a variable to store data from the input file and write to the serial port.
    char data_byte = 0 ;

    while (input_file) 
    {
        // Read data from the input file.
        input_file.read(&data_byte, 1) ;

        // Write the data to the serial port.
        serial_stream.write(&data_byte, 1) ;