GY-63_MS5611/libraries/DAC8552/DAC8552.cpp
2021-12-15 12:48:53 +01:00

207 lines
4.4 KiB
C++

//
// FILE: DAC8552.cpp
// AUTHOR: Rob Tillaart
// PURPOSE: Arduino library for DAC8552 SPI Digital Analog Convertor
// VERSION: 0.2.3
// URL: https://github.com/RobTillaart/DAC8552
//
// HISTORY:
// 0.1.0: 2017-12-14 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 arduino-ci + unit test
// add slave select pin for HW constructor
// 0.2.1 2021-06-02 compile ESP32 + fix for channel B
// 0.2.2 2021-08-29 add support for HSPI / VSPI ESP32 ++
// 0.2.3 2021-12-15 update library.json, license, unit test, minor edits
#include "DAC8552.h"
#define MAXVOLTAGE 5.0
#define MAXVALUE 0xFFFF
DAC8552::DAC8552(uint8_t slaveSelect)
{
_hwSPI = true;
_select = slaveSelect;
}
DAC8552::DAC8552(uint8_t spiData, uint8_t spiClock, uint8_t slaveSelect)
{
_hwSPI = false;
_dataOut = spiData;
_clock = spiClock;
_select = slaveSelect;
}
// initializes the SPI
// and sets internal state
void DAC8552::begin()
{
pinMode(_select, OUTPUT);
digitalWrite(_select, HIGH);
_spi_settings = SPISettings(_SPIspeed, MSBFIRST, SPI_MODE1);
if(_hwSPI)
{
#if defined(ESP32)
if (_useHSPI) // HSPI
{
mySPI = new SPIClass(HSPI);
mySPI->end();
mySPI->begin(14, 12, 13, _select); // CLK=14 MISO=12 MOSI=13
}
else // VSPI
{
mySPI = new SPIClass(VSPI);
mySPI->end();
mySPI->begin(18, 19, 23, _select); // CLK=18 MISO=19 MOSI=23
}
#else // generic hardware SPI
mySPI = &SPI;
mySPI->end();
mySPI->begin();
#endif
delay(1);
}
else // software SPI
{
pinMode(_dataOut, OUTPUT);
pinMode(_clock, OUTPUT);
digitalWrite(_dataOut, LOW);
digitalWrite(_clock, LOW);
}
_value[0] = 0;
_value[1] = 0;
_register[0] = 0x00;
_register[1] = 0x40;
}
#if defined(ESP32)
void DAC8552::setGPIOpins(uint8_t clk, uint8_t miso, uint8_t mosi, uint8_t select)
{
_clock = clk;
_dataOut = mosi;
_select = select;
pinMode(_select, OUTPUT);
digitalWrite(_select, HIGH);
mySPI->end(); // disable SPI
mySPI->begin(clk, miso, mosi, select);
}
#endif
// channel = 0, 1, 2, 3 depending on type
// value = 0..65535
void DAC8552::bufferValue(uint8_t channel, uint16_t value)
{
_value[channel] = value;
updateDevice(channel, false);
}
// channel = 0, 1, 2, 3 depending on type
// value = 0..65535
void DAC8552::setValue(uint8_t channel, uint16_t value)
{
_value[channel] = value;
updateDevice(channel, true);
}
// channel = 0, 1, 2, 3 depending on type
// returns 0..65535
uint16_t DAC8552::getValue(uint8_t channel)
{
return _value[channel];
}
void DAC8552::bufferPowerDown(uint8_t channel, uint8_t powerDownMode)
{
_register[channel] &= 0xFC;
_register[channel] |= (powerDownMode & 0x03);
updateDevice(channel, false);
}
void DAC8552::setPowerDown(uint8_t channel, uint8_t powerDownMode)
{
_register[channel] &= 0xFC;
_register[channel] |= (powerDownMode & 0x03);
updateDevice(channel, true);
}
uint8_t DAC8552::getPowerDownMode(uint8_t channel)
{
return _register[channel] & 0x03;
}
void DAC8552::setSPIspeed(uint32_t speed)
{
_SPIspeed = speed;
_spi_settings = SPISettings(_SPIspeed, MSBFIRST, SPI_MODE1);
};
//////////////////////////////////////////////////////////////////
//
// PRIVATE
//
// channel = 0, 1, 2, 3 depending on type
// direct = true ==> write buffers to both channel A and channel B
// direct = false ==> buffer value
void DAC8552::updateDevice(uint8_t channel, bool directWrite)
{
uint8_t configRegister = _register[channel];
if (directWrite) configRegister |= 0x30;
digitalWrite(_select, LOW);
if (_hwSPI)
{
mySPI->beginTransaction(_spi_settings);
mySPI->transfer(configRegister);
mySPI->transfer(_value[channel] >> 8);
mySPI->transfer(_value[channel] & 0xFF);
mySPI->endTransaction();
}
else // Software SPI
{
swSPI_transfer(configRegister);
swSPI_transfer(_value[channel] >> 8);
swSPI_transfer(_value[channel] & 0xFF);
}
digitalWrite(_select, HIGH);
}
// simple one mode version
void DAC8552::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 --