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/***
* This example expects the serial port has a loopback on it.
*
* Alternatively, you could use an Arduino:
*
* <pre>
* void setup() {
* Serial.begin(<insert your baudrate here>);
* }
*
* void loop() {
* if (Serial.available()) {
* Serial.write(Serial.read());
* }
* }
* </pre>
*/
#include <string>
#include <iostream>
#include <cstdio>
// OS Specific sleep
#ifdef _WIN32
#include <windows.h>
#else
#include <unistd.h>
#endif
#include "serial/serial.h"
using std::string;
using std::exception;
using std::cout;
using std::cerr;
using std::endl;
using std::vector;
void my_sleep(unsigned long milliseconds) {
#ifdef _WIN32
Sleep(milliseconds); // 100 ms
#else
usleep(milliseconds*1000); // 100 ms
#endif
}
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() );
}
}
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;
}
int main(int argc, char **argv) {
try {
return run(argc, argv);
} catch (exception &e) {
cerr << "Unhandled Exception: " << e.what() << endl;
}
}
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