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ADC081S.cpp
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ADC081S.cpp
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//
// FILE: ADC081S.cpp
// AUTHOR: Rob Tillaart
// VERSION: 0.2.1
// DATE: 2024-01-10
// PURPOSE: Arduino library for ADC081S 8 bit ADC (SPI)
// URL: https://github.com/RobTillaart/ADC081S
#include "ADC081S.h"
// HARDWARE SPI
ADC081S::ADC081S(__SPI_CLASS__ * mySPI)
{
_data = 255;
_clock = 255;
_select = 255;
_hwSPI = true;
_mySPI = mySPI;
_maxValue = 255;
_isLowPower = false;
}
// SOFTWARE SPI
ADC081S::ADC081S(uint8_t dataIn, uint8_t clock)
{
_data = dataIn;
_clock = clock;
_select = 255;
_hwSPI = false;
_mySPI = NULL;
_maxValue = 255;
_isLowPower = false;
}
void ADC081S::begin(uint8_t select)
{
_select = select;
pinMode(_select, OUTPUT);
digitalWrite(_select, HIGH);
digitalWrite(_select, LOW);
digitalWrite(_select, HIGH);
_spi_settings = SPISettings(_SPIspeed, MSBFIRST, SPI_MODE0);
if (_hwSPI) // hardware SPI
{
// _mySPI->end();
// _mySPI->begin();
}
else // software SPI
{
pinMode(_data, INPUT);
pinMode(_clock, OUTPUT);
digitalWrite(_clock, HIGH);
}
}
uint16_t ADC081S::maxValue()
{
return _maxValue;
}
uint32_t ADC081S::count()
{
return _count;
}
uint16_t ADC081S::read()
{
return readADC() >> 4; // remove 4 trailing zero's
}
void ADC081S::setSPIspeed(uint32_t speed)
{
_SPIspeed = speed;
_spi_settings = SPISettings(_SPIspeed, MSBFIRST, SPI_MODE0);
}
uint32_t ADC081S::getSPIspeed()
{
return _SPIspeed;
}
bool ADC081S::usesHWSPI()
{
return _hwSPI;
}
void ADC081S::lowPower()
{
_isLowPower = true;
shutDown();
}
void ADC081S::wakeUp()
{
readADC();
_isLowPower = false;
}
bool ADC081S::isLowPower()
{
return _isLowPower;
}
/////////////////////////////////////////////////////////////////////////////
//
// PROTECTED
//
uint16_t ADC081S::readADC()
{
_count++;
uint16_t data = 0;
digitalWrite(_select, LOW);
if (_hwSPI) // hardware SPI
{
_mySPI->beginTransaction(_spi_settings);
data = _mySPI->transfer16(0);
_mySPI->endTransaction();
}
else // Software SPI
{
data = swSPI_transfer16();
}
digitalWrite(_select, HIGH);
return data;
}
void ADC081S::shutDown()
{
digitalWrite(_select, LOW);
if (_hwSPI) // hardware SPI
{
_mySPI->beginTransaction(_spi_settings);
_mySPI->transfer(0); // 8 pulses
_mySPI->endTransaction();
}
else // Software SPI
{
swSPI_transfer16(0x0010); // 4 pulses is enough
}
digitalWrite(_select, HIGH);
}
// MSBFIRST
uint16_t ADC081S::swSPI_transfer16(uint16_t m)
{
uint8_t clk = _clock;
uint8_t dai = _data;
uint16_t rv = 0;
for (uint16_t mask = m; mask; mask >>= 1)
{
digitalWrite(clk, LOW);
digitalWrite(clk, HIGH);
if (digitalRead(dai) == HIGH) rv |= mask;
}
return rv;
}
//////////////////////////////////////////////////////////////////////
//
// DERIVED CLASS ADC101S
//
ADC101S::ADC101S(__SPI_CLASS__ * mySPI) : ADC081S(mySPI)
{
_maxValue = 1023;
}
ADC101S::ADC101S(uint8_t data, uint8_t clock) : ADC081S(data, clock)
{
_maxValue = 1023;
}
uint16_t ADC101S::read()
{
return readADC() >> 2; // remove 2 trailing zero's
}
//////////////////////////////////////////////////////////////////////
//
// DERIVED CLASS ADC121S
//
ADC121S::ADC121S(__SPI_CLASS__ * mySPI) : ADC081S(mySPI)
{
_maxValue = 4095;
}
ADC121S::ADC121S(uint8_t data, uint8_t clock) : ADC081S(data, clock)
{
_maxValue = 4095;
}
uint16_t ADC121S::read()
{
return readADC();
}
// -- END OF FILE --