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https://github.com/RobTillaart/Arduino.git
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110 lines
1.8 KiB
C++
110 lines
1.8 KiB
C++
//
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// FILE: AD5245.cpp
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// AUTHOR: Rob Tillaart
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// VERSION: 0.2.0
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// PURPOSE: Arduino library for I2C digital potentiometer AD5245.
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// DATE: 2022-07-31
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// URL: https://github.com/RobTillaart/AD5245
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#include "AD5245.h"
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#define AD5245_WRITE 0x00
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#define AD5245_RESET 0x40
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#define AD5245_SHUTDOWN 0x20
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AD5245::AD5245(const uint8_t address, TwoWire *wire)
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{
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// address: 0x010110x = 0x2C or 0x2D
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_address = address;
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_wire = wire;
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_lastValue = AD5245_MIDPOINT; // power on reset => mid position
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}
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#if defined (ESP8266) || defined(ESP32)
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bool AD5245::begin(uint8_t dataPin, uint8_t clockPin)
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{
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_wire = &Wire;
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if ((dataPin < 255) && (clockPin < 255))
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{
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_wire->begin(dataPin, clockPin);
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} else {
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_wire->begin();
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}
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if (! isConnected()) return false;
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reset();
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return true;
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}
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#endif
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bool AD5245::begin()
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{
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_wire->begin();
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if (! isConnected()) return false;
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reset();
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return true;
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}
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bool AD5245::isConnected()
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{
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_wire->beginTransmission(_address);
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return ( _wire->endTransmission() == 0);
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}
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uint8_t AD5245::reset()
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{
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uint8_t cmd = AD5245_RESET;
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_lastValue = AD5245_MIDPOINT;
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return send(cmd, _lastValue);
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}
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uint8_t AD5245::write(const uint8_t value)
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{
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uint8_t cmd = AD5245_WRITE;
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_lastValue = value;
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return send(cmd, value);
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}
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uint8_t AD5245::read()
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{
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return _lastValue;
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}
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uint8_t AD5245::readDevice()
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{
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_wire->requestFrom(_address, (uint8_t)1);
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return _wire->read();
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}
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// read datasheet
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uint8_t AD5245::shutDown()
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{
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uint8_t cmd = AD5245_SHUTDOWN;
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return send(cmd, 0);
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}
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//////////////////////////////////////////////////////////
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//
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// PRIVATE
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//
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uint8_t AD5245::send(const uint8_t cmd, const uint8_t value)
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{
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_wire->beginTransmission(_address);
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_wire->write(cmd);
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_wire->write(value);
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return _wire->endTransmission();
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}
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// -- END OF FILE --
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