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https://github.com/RobTillaart/Arduino.git
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139 lines
3.4 KiB
C++
139 lines
3.4 KiB
C++
#pragma once
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//
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// FILE: DS2438.h
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// AUTHOR: Rob Tillaart
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// VERSION: 0.1.1
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// DATE: 2023-07-28
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// PURPOSE: Arduino Library for DS2438 battery monitor
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// URL: https://github.com/RobTillaart/DS2438
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//
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// DS2438
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// +------------------+
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// | 1 GND |
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// | 2 Vsense+ |
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// | 3 Vsense- |
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// | 4 VAD |
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// | 5 VDD |
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// | 6 NC |
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// | 7 NC |
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// | 8 DQ |
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// +------------------+
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//
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// | Pin | Description | Connect to |
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// |:--------:|:------------------------------------|:-------------|
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// | DQ | Data In/Out | processor |
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// | VAD | General A/D input | |
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// | VSENS+ | Battery current monitor input (+) | Battery |
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// | VSENS- | Battery current monitor input (-) | Battery |
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// | VDD | Power Supply (2.4V to 10.0V) | +5V |
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// | GND | Ground | processor |
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// | NC | No connect | - |
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#include "Arduino.h"
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#include "OneWire.h"
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#define DS2438_LIB_VERSION (F("0.1.1"))
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#define DS2438_INVALID -999
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typedef uint8_t DeviceAddress[8];
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class DS2438
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{
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public:
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DS2438(OneWire * ow);
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bool begin(uint8_t retries = 3);
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bool isConnected(uint8_t retries = 3);
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// TEMPERATURE
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// unit is degrees Celsius
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float readTemperature();
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float getTemperature();
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// VOLTAGE
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// unit is Volts
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float readVDD();
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float getVDD();
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float readVAD();
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float getVAD();
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// CURRENT
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void setResistor(float resistor = 0.01); // in OHM
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void enableCurrentMeasurement();
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void disableCurrentMeasurement();
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// unit is Ampere
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float readCurrent();
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float getCurrent();
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void writeCurrentOffset(int value);
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int readCurrentOffset();
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// ICA + THRESHOLD
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// Integrated Current Accumulator.
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float readRemaining();
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void writeThreshold(uint8_t value);
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uint8_t readThreshold();
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// only 4 values used.
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// | value | THRESHOLD |
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// |:-------:|:----------------:|
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// | 0x00 | None (default) |
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// | 0x40 | ±2 LSB |
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// | 0x80 | ±4 LSB |
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// | 0xC0 | ±8 LSB |
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// TIME
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void writeElapsedTimeMeter(uint32_t seconds);
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uint32_t readElapsedTimeMeter();
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uint32_t readDisconnectTime();
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uint32_t readEndOfChargeTime();
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// EEPROM
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void writeEEPROM(uint8_t address, uint8_t value);
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uint8_t readEEPROM(uint8_t address);
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// CCA / DCA
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// Charging + Discharge Current Accumulator
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// unit = mVHr
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void enableCCA();
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void disableCCA();
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float readCCA();
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float readDCA();
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// CONFIG REGISTER
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void setConfigBit(uint8_t bit);
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void clearConfigBit(uint8_t bit);
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uint8_t getConfigRegister();
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private:
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OneWire * _oneWire;
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uint8_t _scratchPad[9];
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uint8_t _address[8];
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bool _addressFound;
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float _temperature;
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float _vad;
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float _vdd;
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float _current;
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float _inverseR; // 1/(4096*resistor) optimized.
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void readScratchPad(uint8_t page);
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void writeScratchPad(uint8_t page);
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};
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// -- END OF FILE --
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