GY-63_MS5611/libraries/DAC8550/DAC8550.cpp
2024-05-23 19:44:03 +02:00

139 lines
2.3 KiB
C++

//
// FILE: DAC8550.cpp
// AUTHOR: Rob Tillaart
// PURPOSE: Arduino library for DAC8550 SPI Digital Analog Convertor
// VERSION: 0.3.1
// DATE: 2021-02-04
// URL: https://github.com/RobTillaart/DAC8550
#include "DAC8550.h"
DAC8550::DAC8550(uint8_t select, __SPI_CLASS__ * spi)
{
_select = select;
_dataOut = 255;
_clock = 255;
_mySPI = spi;
_hwSPI = true;
}
DAC8550::DAC8550(uint8_t select, uint8_t spiData, uint8_t spiClock)
{
_select = select;
_dataOut = spiData;
_clock = spiClock;
_mySPI = NULL;
_hwSPI = false;
}
// initializes the SPI
// and sets internal state
void DAC8550::begin()
{
pinMode(_select, OUTPUT);
digitalWrite(_select, HIGH);
_spi_settings = SPISettings(_SPIspeed, MSBFIRST, SPI_MODE1);
if(_hwSPI)
{
// _mySPI->end();
// _mySPI->begin();
// delay(1);
}
else // SOFTWARE SPI
{
pinMode(_dataOut, OUTPUT);
pinMode(_clock, OUTPUT);
digitalWrite(_dataOut, LOW);
digitalWrite(_clock, LOW);
}
_register = 0;
_value = 0;
}
// value = 0..65535
void DAC8550::setValue(uint16_t value)
{
_value = value;
updateDevice();
}
// returns 0..65535
uint16_t DAC8550::getValue()
{
return _value;
}
void DAC8550::setPowerDown(uint8_t powerDownMode)
{
_register = powerDownMode;
updateDevice();
}
uint8_t DAC8550::getPowerDownMode()
{
return _register & 0x03;
}
void DAC8550::setSPIspeed(uint32_t speed)
{
_SPIspeed = speed;
_spi_settings = SPISettings(_SPIspeed, MSBFIRST, SPI_MODE1);
};
//////////////////////////////////////////////////////////////////
//
// PROTECTED
//
void DAC8550::updateDevice()
{
uint8_t configRegister = _register;
digitalWrite(_select, LOW);
if (_hwSPI)
{
_mySPI->beginTransaction(_spi_settings);
_mySPI->transfer(configRegister);
_mySPI->transfer(_value >> 8);
_mySPI->transfer(_value & 0xFF);
_mySPI->endTransaction();
}
else // Software SPI
{
swSPI_transfer(configRegister);
swSPI_transfer(_value >> 8);
swSPI_transfer(_value & 0xFF);
}
digitalWrite(_select, HIGH);
}
// simple one mode version
void DAC8550::swSPI_transfer(uint8_t value)
{
uint8_t clk = _clock;
uint8_t dao = _dataOut;
for (uint8_t mask = 0x80; mask; mask >>= 1)
{
digitalWrite(dao,(value & mask));
digitalWrite(clk, HIGH);
digitalWrite(clk, LOW);
}
}
// -- END OF FILE --