serial_example.cc File Reference

#include <string>
#include <iostream>
#include <cstdio>
#include <unistd.h>
#include "serial/serial.h"

Include dependency graph for serial_example.cc:

Functions
void	my_sleep (unsigned long milliseconds)
void	enumerate_ports ()
void	print_usage ()
int	run (int argc, char **argv)
int	main (int argc, char **argv)

Function Documentation

void enumerate_ports

(

)

{
    vector<serial::PortInfo> devices_found = serial::list_ports();

    vector<serial::PortInfo>::iterator iter = devices_found.begin();

    while( iter != devices_found.end() )
    {
        serial::PortInfo device = *iter++;

        printf( "(%s, %s, %s)\n", device.port.c_str(), device.description.c_str(),
     device.hardware_id.c_str() );
    }
}

int main	(	int	argc,
		char **	argv
	)

                                {
  try {
    return run(argc, argv);
  } catch (exception &e) {
    cerr << "Unhandled Exception: " << e.what() << endl;
  }
}

void my_sleep

(

unsigned long

milliseconds

)

                                          {
#ifdef _WIN32
      Sleep(milliseconds); // 100 ms
#else
      usleep(milliseconds*1000); // 100 ms
#endif
}

void print_usage

(

)

{
    cerr << "Usage: test_serial {-e|<serial port address>} ";
    cerr << "<baudrate> [test string]" << endl;
}

int run	(	int	argc,
		char **	argv
	)

{
  if(argc < 2) {
      print_usage();
    return 0;
  }

  // Argument 1 is the serial port or enumerate flag
  string port(argv[1]);

  if( port == "-e" ) {
      enumerate_ports();
      return 0;
  }
  else if( argc < 3 ) {
      print_usage();
      return 1;
  }

  // Argument 2 is the baudrate
  unsigned long baud = 0;
#if defined(WIN32) && !defined(__MINGW32__)
  sscanf_s(argv[2], "%lu", &baud);
#else
  sscanf(argv[2], "%lu", &baud);
#endif

  // port, baudrate, timeout in milliseconds
  serial::Serial my_serial(port, baud, serial::Timeout::simpleTimeout(1000));

  cout << "Is the serial port open?";
  if(my_serial.isOpen())
    cout << " Yes." << endl;
  else
    cout << " No." << endl;

  // Get the Test string
  int count = 0;
  string test_string;
  if (argc == 4) {
    test_string = argv[3];
  } else {
    test_string = "Testing.";
  }

  // Test the timeout, there should be 1 second between prints
  cout << "Timeout == 1000ms, asking for 1 more byte than written." << endl;
  while (count < 10) {
    size_t bytes_wrote = my_serial.write(test_string);

    string result = my_serial.read(test_string.length()+1);

    cout << "Iteration: " << count << ", Bytes written: ";
    cout << bytes_wrote << ", Bytes read: ";
    cout << result.length() << ", String read: " << result << endl;

    count += 1;
  }

  // Test the timeout at 250ms
  my_serial.setTimeout(serial::Timeout::max(), 250, 0, 250, 0);
  count = 0;
  cout << "Timeout == 250ms, asking for 1 more byte than written." << endl;
  while (count < 10) {
    size_t bytes_wrote = my_serial.write(test_string);

    string result = my_serial.read(test_string.length()+1);

    cout << "Iteration: " << count << ", Bytes written: ";
    cout << bytes_wrote << ", Bytes read: ";
    cout << result.length() << ", String read: " << result << endl;

    count += 1;
  }

  // Test the timeout at 250ms, but asking exactly for what was written
  count = 0;
  cout << "Timeout == 250ms, asking for exactly what was written." << endl;
  while (count < 10) {
    size_t bytes_wrote = my_serial.write(test_string);

    string result = my_serial.read(test_string.length());

    cout << "Iteration: " << count << ", Bytes written: ";
    cout << bytes_wrote << ", Bytes read: ";
    cout << result.length() << ", String read: " << result << endl;

    count += 1;
  }

  // Test the timeout at 250ms, but asking for 1 less than what was written
  count = 0;
  cout << "Timeout == 250ms, asking for 1 less than was written." << endl;
  while (count < 10) {
    size_t bytes_wrote = my_serial.write(test_string);

    string result = my_serial.read(test_string.length()-1);

    cout << "Iteration: " << count << ", Bytes written: ";
    cout << bytes_wrote << ", Bytes read: ";
    cout << result.length() << ", String read: " << result << endl;

    count += 1;
  }

  return 0;
}