mirror of
https://github.com/RobTillaart/Arduino.git
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92 lines
1.8 KiB
C++
92 lines
1.8 KiB
C++
//
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// FILE: DS28CM00.cpp
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// AUTHOR: Rob Tillaart
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// PURPOSE: Library for the DS28CM00 unique identification chip.
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// VERSION: 0.4.0
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// URL: https://github.com/RobTillaart/DS28CM00
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#include "DS28CM00.h"
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#define DS28CM00_DEVICE_ADDRESS 0x50
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#define DS28CM00_UID_REGISTER 0x00
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#define DS28CM00_CONTROL_REGISTER 0x08
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DS28CM00::DS28CM00(TwoWire *wire)
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{
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_wire = wire;
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}
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bool DS28CM00::begin()
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{
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if (!isConnected()) return false;
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return setI2CMode();
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}
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bool DS28CM00::isConnected()
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{
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_wire->beginTransmission(DS28CM00_DEVICE_ADDRESS);
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int rv = _wire->endTransmission();
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return rv == 0;
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}
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bool DS28CM00::getMode(uint8_t &mode)
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{
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mode = DS28CM00_MODE_UNKNOWN;
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_wire->beginTransmission(DS28CM00_DEVICE_ADDRESS);
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_wire->write(DS28CM00_CONTROL_REGISTER);
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int rv = _wire->endTransmission();
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if (rv != 0) return false;
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uint8_t read = _wire->requestFrom(DS28CM00_DEVICE_ADDRESS, 1);
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if (read < 1) return false;
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mode = _wire->read();
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return true;
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}
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bool DS28CM00::getUID(uint8_t * buffer, uint8_t size)
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{
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_wire->beginTransmission(DS28CM00_DEVICE_ADDRESS);
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_wire->write(DS28CM00_UID_REGISTER);
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int rv = _wire->endTransmission();
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if (rv != 0) return false;
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if (size == 0) return false;
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if (size > 8) size = 8;
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uint8_t read = _wire->requestFrom((uint8_t)DS28CM00_DEVICE_ADDRESS, size);
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if (read < size) return false;
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for (uint8_t i = 0; i < size; i++)
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{
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buffer[i] = _wire->read();
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}
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return true;
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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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bool DS28CM00::setMode(uint8_t mode)
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{
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_wire->beginTransmission(DS28CM00_DEVICE_ADDRESS);
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_wire->write(DS28CM00_CONTROL_REGISTER);
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_wire->write(mode);
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int rv = _wire->endTransmission();
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return rv == 0;
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}
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// -- END OF FILE --
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