74 lines
2.3 KiB
C
74 lines
2.3 KiB
C
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/*
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* DS2438.h
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*
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* by Joe Bechter
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*
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* (C) 2012, bechter.com
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*
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* All files, software, schematics and designs are provided as-is with no warranty.
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* All files, software, schematics and designs are for experimental/hobby use.
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* Under no circumstances should any part be used for critical systems where safety,
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* life or property depends upon it. You are responsible for all use.
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* You are free to use, modify, derive or otherwise extend for your own non-commercial purposes provided
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* 1. No part of this software or design may be used to cause injury or death to humans or animals.
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* 2. Use is non-commercial.
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* 3. Credit is given to the author (i.e. portions © bechter.com), and provide a link to the original source.
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*
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*/
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#ifndef DS2438_h
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#define DS2438_h
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#include <Arduino.h>
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#include <OneWire.h>
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#define DS2438_TEMPERATURE_CONVERSION_COMMAND 0x44
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#define DS2438_VOLTAGE_CONVERSION_COMMAND 0xb4
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#define DS2438_WRITE_SCRATCHPAD_COMMAND 0x4e
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#define DS2438_COPY_SCRATCHPAD_COMMAND 0x48
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#define DS2438_READ_SCRATCHPAD_COMMAND 0xbe
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#define DS2438_RECALL_MEMORY_COMMAND 0xb8
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#define DS2438_PAGE_0 0x00
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#define DS2438_CHA 0
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#define DS2438_CHB 1
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#define DS2438_MODE_CHA 0x01
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#define DS2438_MODE_CHB 0x02
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#define DS2438_MODE_TEMPERATURE 0x04
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#define DS2438_TEMPERATURE_DELAY 10
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#define DS2438_VOLTAGE_CONVERSION_DELAY 8
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typedef uint8_t DeviceAddress[8];
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class DS2438 {
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public:
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DS2438(OneWire *ow);
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DS2438(OneWire *ow, uint8_t *address);
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void begin();
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void update();
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double getTemperature();
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float getVoltage(int channel=DS2438_CHA);
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boolean isError();
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boolean isFound();
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private:
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bool validAddress(const uint8_t*);
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bool validFamily(const uint8_t* deviceAddress);
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bool deviceFound = false;
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OneWire *_ow;
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DeviceAddress _address;
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uint8_t _mode;
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double _temperature;
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float _voltageA;
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float _voltageB;
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boolean _error;
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boolean startConversion(int channel, boolean doTemperature);
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boolean selectChannel(int channel);
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void writePageZero(uint8_t *data);
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boolean readPageZero(uint8_t *data);
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};
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#endif
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