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tempreader.cpp
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tempreader.cpp
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#include "tempreader.h"
#include <iostream>
#include <ctime>
unsigned t3, t4;
tempReader::tempReader()
{
TempSensorInit();
ms_timer = 500;
tempLector.setInterval(ms_timer);
//tempLector.start();
//QTimer* timer = new QTimer(this);
// Read temp continuously
// Opening the device's file triggers new reading
fd = open(devPath, O_RDONLY);
}
void tempReader::setInterval(int ms)
{
ms_timer = ms;
tempLector.setInterval(ms);
}
void tempReader::run()
{
tempLector.start();
exec();
}
void tempReader::LeerTemperatura()
{
#ifdef MEASURE_TIME
t3=clock();
#endif
qDebug()<<"Tiempo entre ADS: "<<time;
if(fd == -1)
{
perror ("Couldn't open the w1 device.");
return;
}
else
{
lseek(fd, 0, SEEK_SET);
}
if((numRead = read(fd, buf, 256)) > 0)
{
strncpy(tmpData, strstr(buf, "t=") + 2, 5);
float tempC = strtof(tmpData, NULL);
tempC /= 1000.0;
qDebug() << "Device: " << dev;
qDebug() << "Temp: " << tempC << "C";
last_temp_1 = tempC;
last_temp_2 = 0.0;
//emit plotTemps(tempC, 0.0);
}
/****** Se midio el tiempo y se encontro que la lectura lleva 0.025 segundos de tiempo.*/
#ifdef MEASURE_TIME
t4=clock();
double time = (double(t4-t3)/CLOCKS_PER_SEC);
qDebug() << "Tiempo adquisicion temperatura"<<time;
#endif
}
float tempReader::getLastTemp(unsigned int n)
{
if(n == 1)
{
return last_temp_1;
}
else if(n== 2)
{
return last_temp_2;
}
return 0.0;
}
void tempReader::TempSensorInit()
{
connect(&tempLector, SIGNAL(timeout()), this, SLOT(LeerTemperatura()));
strcpy(path, "/sys/bus/w1/devices");
dir = opendir (path);
if (dir != NULL)
{
// #ifdef LINUX
while ((dirent = readdir (dir)))
// 1-wire devices are links beginning with 28-
if (dirent->d_type == DT_LNK && strstr(dirent->d_name, "28-") != NULL)
{
strcpy(dev, dirent->d_name);
printf("\nDevice: %s\n", dev);
}
closedir (dir);
// #endif
}
else
{
perror ("Couldn't open the w1 devices directory");
return;
}
// Assemble path to OneWire device
sprintf(devPath, "%s/%s/w1_slave", path, dev);
}
void tempReader::stop()
{
this->tempLector.stop();
}