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https://github.com/RobTillaart/Arduino.git
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76 lines
1.9 KiB
C++
76 lines
1.9 KiB
C++
#pragma once
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//
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// FILE: PCF8591.h
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// AUTHOR: Rob Tillaart
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// DATE: 2020-03-12
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// VERSION: 0.1.1
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// PURPOSE: I2C PCF8591 library for Arduino
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// URL: https://github.com/RobTillaart/PCF8591
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//
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// HISTORY:
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// see PCF8591.cpp file
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//
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#include "Arduino.h"
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#include "Wire.h"
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#define PCF8591_LIB_VERSION (F("0.1.1"))
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#define PCF8591_OK 0x00
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#define PCF8591_PIN_ERROR 0x81
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#define PCF8591_I2C_ERROR 0x82
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#define PCF8591_MODE_ERROR 0x83
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#define PCF8591_CHANNEL_ERROR 0x84
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#define PCF8591_ADDRESS_ERROR 0x85
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// INTERNAL USE ONLY
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#define PCF8591_DAC_FLAG 0x40
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#define PCF8591_INCR_FLAG 0x04
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class PCF8591
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{
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public:
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explicit PCF8591(const uint8_t address = 0x48, TwoWire *wire = &Wire);
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#if defined (ESP8266) || defined(ESP32)
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bool begin(uint8_t sda, uint8_t scl, uint8_t val = 0);
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#endif
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bool begin(uint8_t val = 0);
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bool isConnected();
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// ADC PART
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// auto increment not tested ==> use with care!
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void enableINCR() { _control |= PCF8591_INCR_FLAG; };
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void disableINCR() { _control &= ~PCF8591_INCR_FLAG; };
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bool isINCREnabled() { return ((_control & PCF8591_INCR_FLAG) > 0); };
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uint8_t analogRead(uint8_t channel, uint8_t mode = 0);
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uint8_t analogRead4(); // returns PCF8591_OK or error code.
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uint8_t lastRead(uint8_t channel) { return _adc[channel]; };
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// DAC PART
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void enableDAC() { _control |= PCF8591_DAC_FLAG; };
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void disableDAC() { _control &= ~PCF8591_DAC_FLAG; };
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bool isDACEnabled() { return ((_control & PCF8591_DAC_FLAG) > 0); };
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bool analogWrite(uint8_t value = 0); // returns true on success.
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uint8_t lastWrite() { return _dac; }; // last successful write
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int lastError();
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private:
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uint8_t _address;
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uint8_t _control;
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uint8_t _dac;
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uint8_t _adc[4];
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int _error;
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TwoWire* _wire;
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};
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// END OF FILE
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