src/W1TemperatureSensor.cc

   1 /*
   2  * W1TemperatureSensor.cc
   3  *
   4  *  Created on: Oct 20, 2010
   5  *      Author: lamikr
   6  */
   7 #include <fstream>
   8 #include <vector>
   9 #include <iostream>
  10
  11 #include "W1TemperatureSensor.hh"
  12
  13 using namespace std;
  14 using namespace w1;
  15
  16 W1TemperatureSensor::W1TemperatureSensor(dirent *direntry, int family_code_param, string id_param): W1Device(direntry, family_code_param, id_param) {
  17         ifstream ifs(slave_file.c_str());
  18         if (ifs.is_open() == false) {
  19                 string text;
  20
  21                 text    = get_time() + ": device type = temperature sensor, id = " + id + ", could not read file: " + slave_file;
  22                 cout << text << endl;
  23                 cout << "verify that you have w1_therm kernel module loaded" << endl;
  24         }
  25         else {
  26                 ifs.close();
  27         }
  28 }
  29
  30 W1TemperatureSensor::~W1TemperatureSensor() {
  31 }
  32
  33 bool W1TemperatureSensor::is_supported_family_code(int family_code) {
  34         bool    ret_val;
  35
  36         ret_val = false;
  37         switch(family_code) {
  38                 case 0x10:
  39                 case 0x28:
  40                         ret_val = true;
  41                         break;
  42         }
  43         return ret_val;
  44 }
  45
  46 string W1TemperatureSensor::get_value() {
  47         vector<string>  text_file;
  48         string                  temp;
  49         string                  ret_val;
  50         string                  last_line;
  51         int                             pos;
  52         int                             length;
  53
  54         ret_val = "<could not read>";
  55         ifstream ifs(slave_file.c_str());
  56         if (ifs.is_open() == true) {
  57                 while(getline(ifs, temp)) {
  58                         if (temp.length() > 0) {
  59                                 last_line       = temp;
  60                                 //cout << ret_val << endl;
  61                         }
  62                 }
  63                 ifs.close();
  64                 length  = last_line.length();
  65                 if (length > 0) {
  66                         pos             = last_line.find("t=");
  67                         if ((pos >= 0) &&
  68                                 (pos + 2 < length)) {
  69                                 ret_val = last_line.substr(pos + 2);
  70                         }
  71                 }
  72         }
  73         return ret_val;
  74 }
  75
  76 string W1TemperatureSensor::get_unit() {
  77         return "C";
  78 }
  79
  80 void W1TemperatureSensor::printout() {
  81         string text;
  82
  83         text    = get_time() + ": device type = temperature sensor, id = " + id + ", value = " + get_value();
  84         cout << text << endl;
  85 }