LdmrsNtpTimeApp.cpp

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//
// LdmrsNtpTimeApp.cpp
//
// Demonstrates setting and receiving the NTP timestamp of the
// LDMRS. Sets the timestamp to Jan 1st, 2000.
// Note that during startup, the LD-MRS device class already sets the current
// local time.
// This feature is available in all firmware versions.
//
// The App starts a thread that, after some time, sets the new time in the scanner.
//
// All changes to the sensor configuration are non-permanent.
//
 
#include "LdmrsNtpTimeApp.hpp"
#include "../tools/errorhandler.hpp"    // for printInfoMessage()
#include "../tools/toolbox.hpp"                 // for toString()
#include "../tools/MathToolbox.hpp"
#include "../datatypes/Scan.hpp"
#include "../datatypes/Object.hpp"
#include "../datatypes/Msg.hpp"
#include "../datatypes/Measurement.hpp"
#include "../datatypes/Fields.hpp"
#include "../datatypes/EvalCases.hpp"
#include "../datatypes/EvalCaseResults.hpp"
#include "../devices/LD_MRS.hpp"
#include <time.h>
 
namespace application
{
 
//
// Constructor
//
LdmrsNtpTimeApp::LdmrsNtpTimeApp(Manager* manager) :
                m_manager(manager)
{
        m_beVerbose = true;
        
        // Start the thread that sets the time.
        if (m_changeThread.isRunning() == false)
        {
                m_changeThread.run(this);
        }
        
        printInfoMessage("LdmrsNtpTimeApp constructor done.", m_beVerbose);
}
 
 
// Destructor
// Clean up all dynamic data structures
LdmrsNtpTimeApp::~LdmrsNtpTimeApp()
{
        printInfoMessage("LdmrsNtpTimeApp says Goodbye!", m_beVerbose);
}
 
 
//
// Receiver for new data from the manager.
//
void LdmrsNtpTimeApp::setData(BasicData& data)
{
        // we are just interested in scan data
        switch (data.getDatatype())
        {
                case Datatype_Scan:
                {
                        // Print the scan start timestamp (UTC time)
                        Scan* scan = dynamic_cast<Scan*>(&data);
                        const ScannerInfo* info = scan->getScannerInfoByDeviceId(1);
 
                        if (info != NULL)
                        {
                                const Time& time = info->getStartTimestamp();
                                printInfoMessage("LdmrsApp::setData(): Scan start time: " + time.toLongString(), m_beVerbose);
                        }
                        break;
                }
                default:
                        break;
        }
}
 
 
//
// Convert UNIX system time (seconds since 1.1.1970) to NTP time (secons since 1.1.1900).
//
ntp_time_t LdmrsNtpTimeApp::convertUnixTimeToNtpTime(struct timeval& unixTime)
{
        ntp_time_t ntpTime;
        ntpTime.second = unixTime.tv_sec + 0x83AA7E80;
        ntpTime.fraction = (uint32_t)( (double)(unixTime.tv_usec+1) * (double)(1LL<<32) * 1.0e-6 );
        return ntpTime;
}
 
//
// Thread that does the actual changing of parameters.
//
void LdmrsNtpTimeApp::changeThreadFunction(bool& endThread, UINT16& waitTimeMs)
{
        printInfoMessage("LdmrsNtpTimeApp::changeThreadFunction(): Started.", m_beVerbose);
        bool result;
 
        devices::LDMRS* ldmrs = dynamic_cast<devices::LDMRS*>(m_manager->getFirstDeviceByType(Sourcetype_LDMRS));
 
        // Ensure that we have a valid pointer to the device
        if (ldmrs != NULL)
        {
                // Sleep some time to receive some scans first.
                UINT32 sleepTimeMs = 2000;      // 2000 ms = 2 s
                usleep(sleepTimeMs * 1000);
 
                // Set the date and time to Jan 1st, 2000.
                struct timeval now;
                now.tv_sec = 946681200;                 // 1.1.2000
                now.tv_usec = 0;                                // 0 microseconds
                // Convert to NTP
                ntp_time_t ntpTime = convertUnixTimeToNtpTime(now);
                ntpTime.fraction = (uint32_t)0;
        
                // Set the time
                result = ldmrs->setNtpTime(ntpTime.second, ntpTime.fraction);
                
                if (result == true)
                {
                        // Success
                        printInfoMessage("LdmrsNtpTimeApp::changeThreadFunction(): Successfully set the NTP time.", true);
                }
                else
                {
                        // Failure
                        printError("LdmrsNtpTimeApp::changeThreadFunction(): Failed to set NTP time!");
                }
        }
        else
        {
                // We do not have a pointer to the sensor!
                printError("LdmrsNtpTimeApp::changeThreadFunction():  Failed to get a valid pointer to the MRS, aborting!");
        }
                
 
        endThread = true;
        waitTimeMs = 0;
        printInfoMessage("LdmrsNtpTimeApp::changeThreadFunction():  All done, leaving.", m_beVerbose);
}
 
}       // namespace application