mirror of
https://github.com/RobTillaart/Arduino.git
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107 lines
2.7 KiB
C++
107 lines
2.7 KiB
C++
#pragma once
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//
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// FILE: MCP4725.h
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// AUTHOR: Rob Tillaart
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// PURPOSE: Arduino library for 12 bit I2C DAC - MCP4725
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// VERSION: 0.4.0
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// URL: https://github.com/RobTillaart/MCP4725
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#include "Wire.h"
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#include "Arduino.h"
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#define MCP4725_VERSION (F("0.4.0"))
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// CONSTANTS
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#define MCP4725_MAXVALUE 4095
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// ERRORS
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#define MCP4725_OK 0
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#define MCP4725_VALUE_ERROR -999
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#define MCP4725_REG_ERROR -998
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#define MCP4725_NOT_CONNECTED -997
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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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#define MCP4725_MIDPOINT 2048
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class MCP4725
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{
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public:
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// address = 0x60..0x67
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explicit MCP4725(const uint8_t deviceAddress, TwoWire *wire = &Wire);
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bool begin();
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bool isConnected();
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uint8_t getAddress();
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// uses writeFastMode
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int setValue(const uint16_t value = 0);
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// returns last value set - cached - much faster than readDAC();
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uint16_t getValue();
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// 0..100.0% - input checked.
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// will set the closest integer value in range 0..4095
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int setPercentage(float percentage = 0);
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// due to rounding the returned value can differ slightly.
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float getPercentage();
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// typical and default value = 5.0 V
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void setMaxVoltage(float v = 5.0);
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float getMaxVoltage();
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// will set 0..5V to the closest integer value in range 0..4095
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int setVoltage(float v);
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// returns (approximation of) the set voltage. Assumes linear mapping.
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float getVoltage();
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// unfortunately it is not possible to write a different value
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// to the DAC and EEPROM simultaneously or write EEPROM only.
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int writeDAC(const uint16_t value, const bool EEPROM = false);
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// ready checks if the last write to EEPROM has been written.
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// until ready all writes to the MCP4725 are ignored!
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bool ready();
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uint16_t readDAC();
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uint16_t readEEPROM();
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uint32_t getLastWriteEEPROM(); // returns timestamp
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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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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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uint32_t _lastWriteEEPROM;
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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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int _generalCall(const uint8_t gc);
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float _maxVoltage;
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TwoWire* _wire;
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};
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// -- END OF FILE --
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