GY-63_MS5611/libraries/DAC8551/DAC8551.cpp

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//
// FILE: DAC8551.cpp
// AUTHOR: Rob Tillaart
// PURPOSE: DAC8550 DAC8551 library for Arduino
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// VERSION: 0.1.1
// URL: https://github.com/RobTillaart/Arduino/tree/master/libraries/DAC8551
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// HISTORY:
// 0.1.0: 2017-12-18 initial version
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// 0.1.1: 2017-12-19 fix begin() bug
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//
// Released to the public domain
//
#include <SPI.h>
#include <DAC8551.h>
#define MAXVALUE 0xFFFF
DAC8551::DAC8551()
{
_hwSPI = true;
}
DAC8551::DAC8551(uint8_t spiData, uint8_t spiClock, uint8_t slaveSelect)
{
_hwSPI = false;
_spiData = spiData;
_spiClock = spiClock;
_slaveSelect = slaveSelect;
}
// initializes the SPI
// and sets internal state
void DAC8551::begin()
{
if(_hwSPI)
{
SPI.begin();
delay(1);
}
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else
{
pinMode(_spiData, OUTPUT);
pinMode(_spiClock, OUTPUT);
pinMode(_slaveSelect, OUTPUT);
}
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_register = 0;
_value = 0;
}
// value = 0..65535
void DAC8551::setValue(uint16_t value)
{
_value = value;
updateDevice();
}
// returns 0..65535
uint16_t DAC8551::getValue()
{
return _value;
}
void DAC8551::setPowerDown(uint8_t powerDownMode)
{
_register = powerDownMode;
updateDevice();
}
uint8_t DAC8551::getPowerDownMode()
{
return _register & 0x03;
}
void DAC8551::updateDevice()
{
uint8_t configRegister = _register;
if (_hwSPI)
{
SPI.beginTransaction(SPISettings(16000000, MSBFIRST, SPI_MODE1));
digitalWrite(_slaveSelect, LOW);
SPI.transfer(configRegister);
SPI.transfer(_value >> 8);
SPI.transfer(_value & 0xFF);
digitalWrite(_slaveSelect, LOW);
SPI.endTransaction();
}
else // Software SPI
{
digitalWrite(_slaveSelect, LOW);
swSPI_transfer(configRegister);
swSPI_transfer(_value >> 8);
swSPI_transfer(_value & 0xFF);
digitalWrite(_slaveSelect, LOW);
}
}
// simple one mode version
void DAC8551::swSPI_transfer(uint8_t value)
{
for (uint8_t mask = 0x80; mask; mask >>= 1)
{
digitalWrite(_spiData,(value & mask) != 0);
digitalWrite(_spiClock, HIGH);
digitalWrite(_spiClock, LOW);
}
}
// END OF FILE