GasPressure.cpp

00001 #include "GasPressure.hpp"
00002 
00003 GasPressure::GasPressure()
00004 {
00005     ain = new AnalogIn((PinName)PINS::GAS::AIN);
00006     read();
00007 }
00008 
00009 GasPressure::~GasPressure()
00010 {
00011    delete ain;
00012    ain = NULL;
00013 }
00014 
00015 float
00016 GasPressure::calc()
00017 {
00018 SERIAL_PRINT_DBG_FUNCNAME();
00019      float &v_ref = SENSORS::AP_53A_KEYENCE::V_REF;
00020      float &shut_r = SENSORS::AP_53A_KEYENCE::SHUNT_R;
00021      float &lowest_cur = SENSORS::AP_53A_KEYENCE::LOWEST_CUR;
00022      float &pressure_coef = SENSORS::AP_53A_KEYENCE::PRESSURE_COEF;
00023      float &val = packet.pressure.val;
00024      float ret;
00025      short ret_s;
00026      ret = (v_ref * val / shut_r - lowest_cur) * pressure_coef;
00027      ret_s = ret *= 4096;
00028      ret /= ret_s / 4096;
00029      return ret < 0 ? 0 : ret;
00030 }
00031 
00032 void
00033 GasPressure::toJSON(char* buf)
00034 {
00035     char* &fmt = SENSORS::AP_53A_KEYENCE::JSON_FMT;
00036     char* &type = SENSORS::AP_53A_KEYENCE::TYPE;
00037     char* &pn = SENSORS::AP_53A_KEYENCE::PN;
00038     char* &unit = SENSORS::AP_53A_KEYENCE::UNIT;
00039 SERIAL_PRINT_DBG_FUNCNAME();
00040     time_t &time = packet.pressure.timeStamp;
00041 SERIAL_PRINT_DBG_FUNCNAME();
00042     float f = calc();
00043 SERIAL_PRINT_DBG("%f\n", f);
00044 //      sprintf(buf,fmt,type,pn,time,f,unit);
00045     sprintf(buf,fmt,type,pn,f);
00046 }
00047 
00048 void
00049 GasPressure::getBytes(uint8_t*)
00050 {
00051 }
00052 
00053 void
00054 GasPressure::go()
00055 {
00056     SERIAL_PRINT_DBG_FUNCNAME();
00057     timeout->attach(callback(this, &GasPressure::read), PREFERENCES::SENSING_INTERVAL[SENSORS::PRESSURE]);
00058     packet.pressure.val = ain->read();
00059     SERIAL_PRINT_DBG_FUNCNAME();
00060     RTC_GET_UTC(packet.pressure.timeStamp);
00061     ToDoQ::queuePut(this);
00062     backToNOP();
00063 }