Yoctopuce Yocto-GPS, User Manual

Page: 67 / 572

static void usage (void)
{
cout << "usage: demo <serial_number> " << endl ;
cout << " demo <logical_name>" << endl ;
cout << " demo any (use any discovered device)" << endl ;
u64 now = yGetTickCount () ;
while ( yGetTickCount () - now < 3000 ) {
// wait 3 sec to show the message
}
exit ( 1 ) ;
}
int main ( int argc, const char * argv [])
{
string errmsg, target;
YGps *gps;
if ( argc < 2 ) {
usage () ;
}
target = ( string ) argv [ 1 ] ;
// Setup the API to use local USB devices
if ( yRegisterHub ( "usb" , errmsg ) != YAPI_SUCCESS ) {
cerr << "RegisterHub error: " << errmsg << endl ;
return 1 ;
}
if ( target == "any" ) {
gps = yFirstGps () ;
if ( gps == NULL ) {
cout << "No module connected (check USB cable)" << endl ;
return 1 ;
}
} else {
gps = yFindGps ( ".gps" ) ;
}
while ( 1 ) {
if ( !gps-> isOnline ()) {
cout << "Module not connected (check identification and USB cable)" ;
break ;
}
if ( !gps-> get_isFixed ()) {
cout << "Fixing.." << endl ;
} else {
cout << gps-> get_latitude () << " " << gps-> get_longitude () << endl ;
}
cout << " (press Ctrl-C to exit)" << endl ;
ySleep ( 1000 , errmsg ) ;
}
yFreeAPI () ;
return 0 ;
}
9.2. Control of the module part
Each module can be controlled in a similar manner, you can find below a simple sample program
displaying the main parameters of the module and enabling you to activate the localization beacon.
#include <iostream>
#include <stdlib.h>
#include "yocto_api.h"
using namespace std;
static void usage (const char *exe )
{
cout << "usage: " << exe << " <serial or logical name> [ON/OFF]" << endl ;
exit ( 1 ) ;
}
9. Using Yocto-GPS with C++
www.yoctopuce.com 61