mirror of
https://github.com/RobTillaart/Arduino.git
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99 lines
2.2 KiB
C++
99 lines
2.2 KiB
C++
#ifndef MCP4725_H
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#define MCP4725_H
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//
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// FILE: MCP4725.h
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// AUTHOR: Rob Tillaart
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// PURPOSE: Simple MCP4725 DAC (12 bit I2C) library for Arduino
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// VERSION: 0.1.9
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// HISTORY: See MCP4725.cpp
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// URL: https://github.com/RobTillaart/Arduino/
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//
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// Released to the public domain
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//
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#include <Wire.h>
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#if defined(ARDUINO) && ARDUINO >= 100
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#include "Arduino.h"
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#else
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#include "WProgram.h"
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#include "Wstring.h"
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#include "Wiring.h"
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#endif
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#define MCP4725_VERSION "0.1.9"
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// regisiterMode
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#define MCP4725_DAC 0x40
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#define MCP4725_DACEEPROM 0x60
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// constants
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#define MCP4725_MAXVALUE 4095
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// errors
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#define MCP4725_VALUE_ERROR -999
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#define MCP4725_REG_ERROR -998
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// page 22
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#define MCP4725_GC_RESET 0x06
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#define MCP4725_GC_WAKEUP 0x09
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// powerDown Mode - TODO ENUM?
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#define MCP4725_PDMODE_NORMAL 0x00
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#define MCP4725_PDMODE_1K 0x01
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#define MCP4725_PDMODE_100K 0x02
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#define MCP4725_PDMODE_500K 0x03
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// conditional to minimize footprint.
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//#define MCP4725_EXTENDED
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//#define MCP4725_POWERDOWNMODE
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class MCP4725
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{
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public:
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explicit MCP4725(const uint8_t deviceAddress);
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#if defined(ESP8266) || defined(ESP32)
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void begin(const uint8_t dataPin, const uint8_t clockPin);
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#endif
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void begin();
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// uses writeFastMode
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int setValue(const uint16_t value);
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// returns last value set - cached - much faster than readDAC();
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uint16_t getValue();
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#ifdef MCP4725_EXTENDED
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int writeDAC(const uint16_t value, const bool EEPROM = false);
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bool RDY();
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uint16_t readDAC();
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uint16_t readEEPROM();
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#endif
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#ifdef MCP4725_POWERDOWNMODE
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// experimental
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int writePowerDownMode(const uint8_t PDM, const bool EEPROM = false);
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uint8_t readPowerDownModeEEPROM();
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uint8_t readPowerDownModeDAC();
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int powerOnReset();
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int powerOnWakeUp();
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#endif
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private:
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uint8_t _deviceAddress;
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uint16_t _lastValue;
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uint8_t _powerDownMode; // DATASHEET P15?
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int writeFastMode(const uint16_t value);
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#ifdef MCP4725_EXTENDED
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int writeRegisterMode(const uint16_t value, uint8_t reg);
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uint8_t readRegister(uint8_t* buffer, const uint8_t length);
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#endif
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#ifdef MCP4725_POWERDOWNMODE
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int generalCall(const uint8_t gc);
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#endif
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};
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#endif
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// END OF FILE
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