mirror of
https://github.com/RobTillaart/Arduino.git
synced 2024-09-19 16:46:11 -04:00
118 lines
2.3 KiB
C++
118 lines
2.3 KiB
C++
//
|
|
// FILE: DAC8551.cpp
|
|
// AUTHOR: Rob Tillaart
|
|
// PURPOSE: Arduino library for DAC8551 SPI Digital Analog Convertor
|
|
// VERSION: 0.2.1
|
|
// URL: https://github.com/RobTillaart/DAC8551
|
|
//
|
|
// HISTORY
|
|
// 0.1.0: 2017-12-18 initial version
|
|
// 0.1.1: 2017-12-19 fix begin() bug
|
|
// 0.1.2 2020-04-06 minor refactor, readme.md
|
|
// 0.1.3 2020-06-07 fix library.json
|
|
// 0.2.0 2020-12-18 add slaveSelect to hardware SPI
|
|
// 0.2.1 2020-12-18 add arduino-ci + unit tests
|
|
|
|
|
|
#include "DAC8551.h"
|
|
|
|
|
|
DAC8551::DAC8551(uint8_t slaveSelect)
|
|
{
|
|
_hwSPI = true;
|
|
_slaveSelect = slaveSelect;
|
|
}
|
|
|
|
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()
|
|
{
|
|
pinMode(_slaveSelect, OUTPUT);
|
|
digitalWrite(_slaveSelect, HIGH);
|
|
|
|
if(_hwSPI)
|
|
{
|
|
SPI.begin();
|
|
delay(1);
|
|
}
|
|
else
|
|
{
|
|
pinMode(_spiData, OUTPUT);
|
|
pinMode(_spiClock, OUTPUT);
|
|
digitalWrite(_spiData, LOW);
|
|
digitalWrite(_spiClock, LOW);
|
|
}
|
|
|
|
_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, HIGH);
|
|
SPI.endTransaction();
|
|
}
|
|
else // Software SPI
|
|
{
|
|
digitalWrite(_slaveSelect, LOW);
|
|
swSPI_transfer(configRegister);
|
|
swSPI_transfer(_value >> 8);
|
|
swSPI_transfer(_value & 0xFF);
|
|
digitalWrite(_slaveSelect, HIGH);
|
|
}
|
|
}
|
|
|
|
// 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 --
|