diff --git a/libraries/Sensor_ThirdParty/src/DallasTemperature.cpp b/libraries/Sensor_ThirdParty/src/DallasTemperature.cpp new file mode 100644 index 00000000..265d3e8b --- /dev/null +++ b/libraries/Sensor_ThirdParty/src/DallasTemperature.cpp @@ -0,0 +1,744 @@ +// This library is free software; you can redistribute it and/or +// modify it under the terms of the GNU Lesser General Public +// License as published by the Free Software Foundation; either +// version 2.1 of the License, or (at your option) any later version. + +// Version 3.7.2 modified on Dec 6, 2011 to support Arduino 1.0 +// See Includes... +// Modified by Jordan Hochenbaum + +#include "DallasTemperature.h" + +#ifdef __AVR__ + #if ARDUINO >= 100 + #include "Arduino.h" + #else + extern "C" { + #include "WConstants.h" + } + #endif +#endif +#ifdef STM32F10X_MD + #include "spark_wiring.h" +#endif + +DallasTemperature::DallasTemperature(OneWire* _oneWire) + #if REQUIRESALARMS + : _AlarmHandler(&defaultAlarmHandler) + #endif +{ + _wire = _oneWire; + devices = 0; + parasite = false; + bitResolution = 9; + waitForConversion = true; + checkForConversion = true; +} + +// initialise the bus +void DallasTemperature::begin(void) +{ + DeviceAddress deviceAddress; + + _wire->reset_search(); + devices = 0; // Reset the number of devices when we enumerate wire devices + + while (_wire->search(deviceAddress)) + { + if (validAddress(deviceAddress)) + { + if (!parasite && readPowerSupply(deviceAddress)) parasite = true; + + ScratchPad scratchPad; + + readScratchPad(deviceAddress, scratchPad); + + bitResolution = max(bitResolution, getResolution(deviceAddress)); + + devices++; + } + } +} + +// returns the number of devices found on the bus +uint8_t DallasTemperature::getDeviceCount(void) +{ + return devices; +} + +// returns true if address is valid +bool DallasTemperature::validAddress(uint8_t* deviceAddress) +{ + return (_wire->crc8(deviceAddress, 7) == deviceAddress[7]); +} + +// finds an address at a given index on the bus +// returns true if the device was found +bool DallasTemperature::getAddress(uint8_t* deviceAddress, uint8_t index) +{ + uint8_t depth = 0; + + _wire->reset_search(); + + while (depth <= index && _wire->search(deviceAddress)) + { + if (depth == index && validAddress(deviceAddress)) return true; + depth++; + } + + return false; +} + +// attempt to determine if the device at the given address is connected to the bus +bool DallasTemperature::isConnected(uint8_t* deviceAddress) +{ + ScratchPad scratchPad; + return isConnected(deviceAddress, scratchPad); +} + +// attempt to determine if the device at the given address is connected to the bus +// also allows for updating the read scratchpad +bool DallasTemperature::isConnected(uint8_t* deviceAddress, uint8_t* scratchPad) +{ + readScratchPad(deviceAddress, scratchPad); + return (_wire->crc8(scratchPad, 8) == scratchPad[SCRATCHPAD_CRC]); +} + +// read device's scratch pad +void DallasTemperature::readScratchPad(uint8_t* deviceAddress, uint8_t* scratchPad) +{ + // send the command + _wire->reset(); + _wire->select(deviceAddress); + _wire->write(READSCRATCH); + + // TODO => collect all comments & use simple loop + // byte 0: temperature LSB + // byte 1: temperature MSB + // byte 2: high alarm temp + // byte 3: low alarm temp + // byte 4: DS18S20: store for crc + // DS18B20 & DS1822: configuration register + // byte 5: internal use & crc + // byte 6: DS18S20: COUNT_REMAIN + // DS18B20 & DS1822: store for crc + // byte 7: DS18S20: COUNT_PER_C + // DS18B20 & DS1822: store for crc + // byte 8: SCRATCHPAD_CRC + // + // for(int i=0; i<9; i++) + // { + // scratchPad[i] = _wire->read(); + // } + + + // read the response + + // byte 0: temperature LSB + scratchPad[TEMP_LSB] = _wire->read(); + + // byte 1: temperature MSB + scratchPad[TEMP_MSB] = _wire->read(); + + // byte 2: high alarm temp + scratchPad[HIGH_ALARM_TEMP] = _wire->read(); + + // byte 3: low alarm temp + scratchPad[LOW_ALARM_TEMP] = _wire->read(); + + // byte 4: + // DS18S20: store for crc + // DS18B20 & DS1822: configuration register + scratchPad[CONFIGURATION] = _wire->read(); + + // byte 5: + // internal use & crc + scratchPad[INTERNAL_BYTE] = _wire->read(); + + // byte 6: + // DS18S20: COUNT_REMAIN + // DS18B20 & DS1822: store for crc + scratchPad[COUNT_REMAIN] = _wire->read(); + + // byte 7: + // DS18S20: COUNT_PER_C + // DS18B20 & DS1822: store for crc + scratchPad[COUNT_PER_C] = _wire->read(); + + // byte 8: + // SCTRACHPAD_CRC + scratchPad[SCRATCHPAD_CRC] = _wire->read(); + + _wire->reset(); +} + +// writes device's scratch pad +void DallasTemperature::writeScratchPad(uint8_t* deviceAddress, const uint8_t* scratchPad) +{ + _wire->reset(); + _wire->select(deviceAddress); + _wire->write(WRITESCRATCH); + _wire->write(scratchPad[HIGH_ALARM_TEMP]); // high alarm temp + _wire->write(scratchPad[LOW_ALARM_TEMP]); // low alarm temp + // DS18S20 does not use the configuration register + if (deviceAddress[0] != DS18S20MODEL) _wire->write(scratchPad[CONFIGURATION]); // configuration + _wire->reset(); + // save the newly written values to eeprom + _wire->write(COPYSCRATCH, parasite); + if (parasite) delay(10); // 10ms delay + _wire->reset(); +} + +// reads the device's power requirements +bool DallasTemperature::readPowerSupply(uint8_t* deviceAddress) +{ + bool ret = false; + _wire->reset(); + _wire->select(deviceAddress); + _wire->write(READPOWERSUPPLY); + if (_wire->read_bit() == 0) ret = true; + _wire->reset(); + return ret; +} + + +// set resolution of all devices to 9, 10, 11, or 12 bits +// if new resolution is out of range, it is constrained. +void DallasTemperature::setResolution(uint8_t newResolution) +{ + bitResolution = constrain(newResolution, 9, 12); + DeviceAddress deviceAddress; + for (int i=0; ireset(); + _wire->skip(); + _wire->write(STARTCONVO, parasite); + + // ASYNC mode? + if (!waitForConversion) return; + blockTillConversionComplete(&bitResolution, 0); + + return; +} + +// sends command for one device to perform a temperature by address +// returns FALSE if device is disconnected +// returns TRUE otherwise +bool DallasTemperature::requestTemperaturesByAddress(uint8_t* deviceAddress) +{ + + _wire->reset(); + _wire->select(deviceAddress); + _wire->write(STARTCONVO, parasite); + + // check device + ScratchPad scratchPad; + if (!isConnected(deviceAddress, scratchPad)) return false; + + + // ASYNC mode? + if (!waitForConversion) return true; + uint8_t bitResolution = getResolution(deviceAddress); + blockTillConversionComplete(&bitResolution, deviceAddress); + + return true; +} + + +void DallasTemperature::blockTillConversionComplete(uint8_t* bitResolution, uint8_t* deviceAddress) +{ + if(deviceAddress != 0 && checkForConversion && !parasite) + { + // Continue to check if the IC has responded with a temperature + // NB: Could cause issues with multiple devices (one device may respond faster) + unsigned long start = millis(); + while(!isConversionAvailable(0) && ((millis() - start) < 750)); + } + + // Wait a fix number of cycles till conversion is complete (based on IC datasheet) + switch (*bitResolution) + { + case 9: + delay(94); + break; + case 10: + delay(188); + break; + case 11: + delay(375); + break; + case 12: + default: + delay(750); + break; + } + +} + +// sends command for one device to perform a temp conversion by index +bool DallasTemperature::requestTemperaturesByIndex(uint8_t deviceIndex) +{ + DeviceAddress deviceAddress; + getAddress(deviceAddress, deviceIndex); + return requestTemperaturesByAddress(deviceAddress); +} + +// Fetch temperature for device index +float DallasTemperature::getTempCByIndex(uint8_t deviceIndex) +{ + DeviceAddress deviceAddress; + getAddress(deviceAddress, deviceIndex); + return getTempC((uint8_t*)deviceAddress); +} + +// Fetch temperature for device index +float DallasTemperature::getTempFByIndex(uint8_t deviceIndex) +{ + return toFahrenheit(getTempCByIndex(deviceIndex)); +} + +// reads scratchpad and returns the temperature in degrees C +float DallasTemperature::calculateTemperature(uint8_t* deviceAddress, uint8_t* scratchPad) +{ + int16_t rawTemperature = (((int16_t)scratchPad[TEMP_MSB]) << 8) | scratchPad[TEMP_LSB]; + + switch (deviceAddress[0]) + { + case DS18B20MODEL: + case DS1822MODEL: + switch (scratchPad[CONFIGURATION]) + { + case TEMP_12_BIT: + return (float)rawTemperature * 0.0625; + break; + case TEMP_11_BIT: + return (float)(rawTemperature >> 1) * 0.125; + break; + case TEMP_10_BIT: + return (float)(rawTemperature >> 2) * 0.25; + break; + case TEMP_9_BIT: + return (float)(rawTemperature >> 3) * 0.5; + break; + } + break; + case DS18S20MODEL: + /* + + Resolutions greater than 9 bits can be calculated using the data from + the temperature, COUNT REMAIN and COUNT PER �C registers in the + scratchpad. Note that the COUNT PER �C register is hard-wired to 16 + (10h). After reading the scratchpad, the TEMP_READ value is obtained + by truncating the 0.5�C bit (bit 0) from the temperature data. The + extended resolution temperature can then be calculated using the + following equation: + + COUNT_PER_C - COUNT_REMAIN + TEMPERATURE = TEMP_READ - 0.25 + -------------------------- + COUNT_PER_C + */ + + // Good spot. Thanks Nic Johns for your contribution + return (float)(rawTemperature >> 1) - 0.25 +((float)(scratchPad[COUNT_PER_C] - scratchPad[COUNT_REMAIN]) / (float)scratchPad[COUNT_PER_C] ); + break; + } + return (float)00.00; +} + +// returns temperature in degrees C or DEVICE_DISCONNECTED if the +// device's scratch pad cannot be read successfully. +// the numeric value of DEVICE_DISCONNECTED is defined in +// DallasTemperature.h. It is a large negative number outside the +// operating range of the device +float DallasTemperature::getTempC(uint8_t* deviceAddress) +{ + // TODO: Multiple devices (up to 64) on the same bus may take + // some time to negotiate a response + // What happens in case of collision? + + ScratchPad scratchPad; + if (isConnected(deviceAddress, scratchPad)) return calculateTemperature(deviceAddress, scratchPad); + return DEVICE_DISCONNECTED; +} + +// returns temperature in degrees F +// TODO: - when getTempC returns DEVICE_DISCONNECTED +// -127 gets converted to -196.6 F +float DallasTemperature::getTempF(uint8_t* deviceAddress) +{ + return toFahrenheit(getTempC(deviceAddress)); +} + +// returns true if the bus requires parasite power +bool DallasTemperature::isParasitePowerMode(void) +{ + return parasite; +} + +#if REQUIRESALARMS + +/* + +ALARMS: + +TH and TL Register Format + +BIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0 + S 2^6 2^5 2^4 2^3 2^2 2^1 2^0 + +Only bits 11 through 4 of the temperature register are used +in the TH and TL comparison since TH and TL are 8-bit +registers. If the measured temperature is lower than or equal +to TL or higher than or equal to TH, an alarm condition exists +and an alarm flag is set inside the DS18B20. This flag is +updated after every temperature measurement; therefore, if the +alarm condition goes away, the flag will be turned off after +the next temperature conversion. + +*/ + +// sets the high alarm temperature for a device in degrees celsius +// accepts a float, but the alarm resolution will ignore anything +// after a decimal point. valid range is -55C - 125C +void DallasTemperature::setHighAlarmTemp(uint8_t* deviceAddress, char celsius) +{ + // make sure the alarm temperature is within the device's range + if (celsius > 125) celsius = 125; + else if (celsius < -55) celsius = -55; + + ScratchPad scratchPad; + if (isConnected(deviceAddress, scratchPad)) + { + scratchPad[HIGH_ALARM_TEMP] = (uint8_t)celsius; + writeScratchPad(deviceAddress, scratchPad); + } +} + +// sets the low alarm temperature for a device in degreed celsius +// accepts a float, but the alarm resolution will ignore anything +// after a decimal point. valid range is -55C - 125C +void DallasTemperature::setLowAlarmTemp(uint8_t* deviceAddress, char celsius) +{ + // make sure the alarm temperature is within the device's range + if (celsius > 125) celsius = 125; + else if (celsius < -55) celsius = -55; + + ScratchPad scratchPad; + if (isConnected(deviceAddress, scratchPad)) + { + scratchPad[LOW_ALARM_TEMP] = (uint8_t)celsius; + writeScratchPad(deviceAddress, scratchPad); + } +} + +// returns a char with the current high alarm temperature or +// DEVICE_DISCONNECTED for an address +char DallasTemperature::getHighAlarmTemp(uint8_t* deviceAddress) +{ + ScratchPad scratchPad; + if (isConnected(deviceAddress, scratchPad)) return (char)scratchPad[HIGH_ALARM_TEMP]; + return DEVICE_DISCONNECTED; +} + +// returns a char with the current low alarm temperature or +// DEVICE_DISCONNECTED for an address +char DallasTemperature::getLowAlarmTemp(uint8_t* deviceAddress) +{ + ScratchPad scratchPad; + if (isConnected(deviceAddress, scratchPad)) return (char)scratchPad[LOW_ALARM_TEMP]; + return DEVICE_DISCONNECTED; +} + +// resets internal variables used for the alarm search +void DallasTemperature::resetAlarmSearch() +{ + alarmSearchJunction = -1; + alarmSearchExhausted = 0; + for(uint8_t i = 0; i < 7; i++) + alarmSearchAddress[i] = 0; +} + +// This is a modified version of the OneWire::search method. +// +// Also added the OneWire search fix documented here: +// http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1238032295 +// +// Perform an alarm search. If this function returns a '1' then it has +// enumerated the next device and you may retrieve the ROM from the +// OneWire::address variable. If there are no devices, no further +// devices, or something horrible happens in the middle of the +// enumeration then a 0 is returned. If a new device is found then +// its address is copied to newAddr. Use +// DallasTemperature::resetAlarmSearch() to start over. +bool DallasTemperature::alarmSearch(uint8_t* newAddr) +{ + uint8_t i; + char lastJunction = -1; + uint8_t done = 1; + + if (alarmSearchExhausted) return false; + if (!_wire->reset()) return false; + + // send the alarm search command + _wire->write(0xEC, 0); + + for(i = 0; i < 64; i++) + { + uint8_t a = _wire->read_bit( ); + uint8_t nota = _wire->read_bit( ); + uint8_t ibyte = i / 8; + uint8_t ibit = 1 << (i & 7); + + // I don't think this should happen, this means nothing responded, but maybe if + // something vanishes during the search it will come up. + if (a && nota) return false; + + if (!a && !nota) + { + if (i == alarmSearchJunction) + { + // this is our time to decide differently, we went zero last time, go one. + a = 1; + alarmSearchJunction = lastJunction; + } + else if (i < alarmSearchJunction) + { + // take whatever we took last time, look in address + if (alarmSearchAddress[ibyte] & ibit) a = 1; + else + { + // Only 0s count as pending junctions, we've already exhasuted the 0 side of 1s + a = 0; + done = 0; + lastJunction = i; + } + } + else + { + // we are blazing new tree, take the 0 + a = 0; + alarmSearchJunction = i; + done = 0; + } + // OneWire search fix + // See: http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1238032295 + } + + if (a) alarmSearchAddress[ibyte] |= ibit; + else alarmSearchAddress[ibyte] &= ~ibit; + + _wire->write_bit(a); + } + + if (done) alarmSearchExhausted = 1; + for (i = 0; i < 8; i++) newAddr[i] = alarmSearchAddress[i]; + return true; +} + +// returns true if device address has an alarm condition +// TODO: can this be done with only TEMP_MSB REGISTER (faster) +// if ((char) scratchPad[TEMP_MSB] <= (char) scratchPad[LOW_ALARM_TEMP]) return true; +// if ((char) scratchPad[TEMP_MSB] >= (char) scratchPad[HIGH_ALARM_TEMP]) return true; +bool DallasTemperature::hasAlarm(uint8_t* deviceAddress) +{ + ScratchPad scratchPad; + if (isConnected(deviceAddress, scratchPad)) + { + float temp = calculateTemperature(deviceAddress, scratchPad); + + // check low alarm + if ((char)temp <= (char)scratchPad[LOW_ALARM_TEMP]) return true; + + // check high alarm + if ((char)temp >= (char)scratchPad[HIGH_ALARM_TEMP]) return true; + } + + // no alarm + return false; +} + +// returns true if any device is reporting an alarm condition on the bus +bool DallasTemperature::hasAlarm(void) +{ + DeviceAddress deviceAddress; + resetAlarmSearch(); + return alarmSearch(deviceAddress); +} + +// runs the alarm handler for all devices returned by alarmSearch() +void DallasTemperature::processAlarms(void) +{ + resetAlarmSearch(); + DeviceAddress alarmAddr; + + while (alarmSearch(alarmAddr)) + { + if (validAddress(alarmAddr)) + _AlarmHandler(alarmAddr); + } +} + +// sets the alarm handler +void DallasTemperature::setAlarmHandler(AlarmHandler *handler) +{ + _AlarmHandler = handler; +} + +// The default alarm handler +void DallasTemperature::defaultAlarmHandler(uint8_t* deviceAddress) +{ +} + +#endif + +// Convert float celsius to fahrenheit +float DallasTemperature::toFahrenheit(float celsius) +{ + return (celsius * 1.8) + 32; +} + +// Convert float fahrenheit to celsius +float DallasTemperature::toCelsius(float fahrenheit) +{ + return (fahrenheit - 32) / 1.8; +} + +#if REQUIRESNEW + +// MnetCS - Allocates memory for DallasTemperature. Allows us to instance a new object +void* DallasTemperature::operator new(unsigned int size) // Implicit NSS obj size +{ + void * p; // void pointer + p = malloc(size); // Allocate memory + memset((DallasTemperature*)p,0,size); // Initalise memory + + //!!! CANT EXPLICITLY CALL CONSTRUCTOR - workaround by using an init() methodR - workaround by using an init() method + return (DallasTemperature*) p; // Cast blank region to NSS pointer +} + +// MnetCS 2009 - Unallocates the memory used by this instance +void DallasTemperature::operator delete(void* p) +{ + DallasTemperature* pNss = (DallasTemperature*) p; // Cast to NSS pointer + pNss->~DallasTemperature(); // Destruct the object + + free(p); // Free the memory +} + +#endif diff --git a/libraries/Sensor_ThirdParty/src/DallasTemperature.h b/libraries/Sensor_ThirdParty/src/DallasTemperature.h new file mode 100644 index 00000000..d71fb981 --- /dev/null +++ b/libraries/Sensor_ThirdParty/src/DallasTemperature.h @@ -0,0 +1,242 @@ +#ifndef DallasTemperature_h +#define DallasTemperature_h + +#define DALLASTEMPLIBVERSION "3.7.2" + +// This library is free software; you can redistribute it and/or +// modify it under the terms of the GNU Lesser General Public +// License as published by the Free Software Foundation; either +// version 2.1 of the License, or (at your option) any later version. + +// set to true to include code for new and delete operators +#ifndef REQUIRESNEW +#define REQUIRESNEW false +#endif + +// set to true to include code implementing alarm search functions +#ifndef REQUIRESALARMS +#define REQUIRESALARMS true +#endif + +#include +#include + +// Model IDs +#define DS18S20MODEL 0x10 +#define DS18B20MODEL 0x28 +#define DS1822MODEL 0x22 + +// OneWire commands +#define STARTCONVO 0x44 // Tells device to take a temperature reading and put it on the scratchpad +#define COPYSCRATCH 0x48 // Copy EEPROM +#define READSCRATCH 0xBE // Read EEPROM +#define WRITESCRATCH 0x4E // Write to EEPROM +#define RECALLSCRATCH 0xB8 // Reload from last known +#define READPOWERSUPPLY 0xB4 // Determine if device needs parasite power +#define ALARMSEARCH 0xEC // Query bus for devices with an alarm condition + +// Scratchpad locations +#define TEMP_LSB 0 +#define TEMP_MSB 1 +#define HIGH_ALARM_TEMP 2 +#define LOW_ALARM_TEMP 3 +#define CONFIGURATION 4 +#define INTERNAL_BYTE 5 +#define COUNT_REMAIN 6 +#define COUNT_PER_C 7 +#define SCRATCHPAD_CRC 8 + +// Device resolution +#define TEMP_9_BIT 0x1F // 9 bit +#define TEMP_10_BIT 0x3F // 10 bit +#define TEMP_11_BIT 0x5F // 11 bit +#define TEMP_12_BIT 0x7F // 12 bit + +// Error Codes +#define DEVICE_DISCONNECTED -127 + +typedef uint8_t DeviceAddress[8]; + +class DallasTemperature +{ + public: + + DallasTemperature(OneWire*); + + // initalise bus + void begin(void); + + // returns the number of devices found on the bus + uint8_t getDeviceCount(void); + + // Is a conversion complete on the wire? + bool isConversionComplete(void); + + // returns true if address is valid + bool validAddress(uint8_t*); + + // finds an address at a given index on the bus + bool getAddress(uint8_t*, const uint8_t); + + // attempt to determine if the device at the given address is connected to the bus + bool isConnected(uint8_t*); + + // attempt to determine if the device at the given address is connected to the bus + // also allows for updating the read scratchpad + bool isConnected(uint8_t*, uint8_t*); + + // read device's scratchpad + void readScratchPad(uint8_t*, uint8_t*); + + // write device's scratchpad + void writeScratchPad(uint8_t*, const uint8_t*); + + // read device's power requirements + bool readPowerSupply(uint8_t*); + + // get global resolution + uint8_t getResolution(); + + // set global resolution to 9, 10, 11, or 12 bits + void setResolution(uint8_t); + + // returns the device resolution, 9-12 + uint8_t getResolution(uint8_t*); + + // set resolution of a device to 9, 10, 11, or 12 bits + bool setResolution(uint8_t*, uint8_t); + + // sets/gets the waitForConversion flag + void setWaitForConversion(bool); + bool getWaitForConversion(void); + + // sets/gets the checkForConversion flag + void setCheckForConversion(bool); + bool getCheckForConversion(void); + + // sends command for all devices on the bus to perform a temperature conversion + void requestTemperatures(void); + + // sends command for one device to perform a temperature conversion by address + bool requestTemperaturesByAddress(uint8_t*); + + // sends command for one device to perform a temperature conversion by index + bool requestTemperaturesByIndex(uint8_t); + + // returns temperature in degrees C + float getTempC(uint8_t*); + + // returns temperature in degrees F + float getTempF(uint8_t*); + + // Get temperature for device index (slow) + float getTempCByIndex(uint8_t); + + // Get temperature for device index (slow) + float getTempFByIndex(uint8_t); + + // returns true if the bus requires parasite power + bool isParasitePowerMode(void); + + bool isConversionAvailable(uint8_t*); + + #if REQUIRESALARMS + + typedef void AlarmHandler(uint8_t*); + + // sets the high alarm temperature for a device + // accepts a char. valid range is -55C - 125C + void setHighAlarmTemp(uint8_t*, const char); + + // sets the low alarm temperature for a device + // accepts a char. valid range is -55C - 125C + void setLowAlarmTemp(uint8_t*, const char); + + // returns a signed char with the current high alarm temperature for a device + // in the range -55C - 125C + char getHighAlarmTemp(uint8_t*); + + // returns a signed char with the current low alarm temperature for a device + // in the range -55C - 125C + char getLowAlarmTemp(uint8_t*); + + // resets internal variables used for the alarm search + void resetAlarmSearch(void); + + // search the wire for devices with active alarms + bool alarmSearch(uint8_t*); + + // returns true if ia specific device has an alarm + bool hasAlarm(uint8_t*); + + // returns true if any device is reporting an alarm on the bus + bool hasAlarm(void); + + // runs the alarm handler for all devices returned by alarmSearch() + void processAlarms(void); + + // sets the alarm handler + void setAlarmHandler(AlarmHandler *); + + // The default alarm handler + static void defaultAlarmHandler(uint8_t*); + + #endif + + // convert from celcius to farenheit + static float toFahrenheit(const float); + + // convert from farenheit to celsius + static float toCelsius(const float); + + #if REQUIRESNEW + + // initalize memory area + void* operator new (unsigned int); + + // delete memory reference + void operator delete(void*); + + #endif + + private: + typedef uint8_t ScratchPad[9]; + + // parasite power on or off + bool parasite; + + // used to determine the delay amount needed to allow for the + // temperature conversion to take place + uint8_t bitResolution; + + // used to requestTemperature with or without delay + bool waitForConversion; + + // used to requestTemperature to dynamically check if a conversion is complete + bool checkForConversion; + + // count of devices on the bus + uint8_t devices; + + // Take a pointer to one wire instance + OneWire* _wire; + + // reads scratchpad and returns the temperature in degrees C + float calculateTemperature(uint8_t*, uint8_t*); + + void blockTillConversionComplete(uint8_t*,uint8_t*); + + #if REQUIRESALARMS + + // required for alarmSearch + uint8_t alarmSearchAddress[8]; + char alarmSearchJunction; + uint8_t alarmSearchExhausted; + + // the alarm handler function pointer + AlarmHandler *_AlarmHandler; + + #endif + +}; +#endif