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https://github.com/RobTillaart/Arduino.git
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180 lines
3.6 KiB
C++
180 lines
3.6 KiB
C++
//
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// FILE: DAC8552.cpp
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// AUTHOR: Rob Tillaart
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// PURPOSE: Arduino library for DAC8552 SPI Digital Analog Convertor
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// VERSION: 0.5.1
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// DATE: 2017-12-14
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// URL: https://github.com/RobTillaart/DAC8552
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#include "DAC8552.h"
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DAC8552::DAC8552(uint8_t select, __SPI_CLASS__ * spi)
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{
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_select = select;
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_dataOut = 255;
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_clock = 255;
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_mySPI = spi;
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_hwSPI = true;
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}
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DAC8552::DAC8552(uint8_t select, uint8_t spiData, uint8_t spiClock)
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{
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_select = select;
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_dataOut = spiData;
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_clock = spiClock;
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_mySPI = NULL;
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_hwSPI = false;
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}
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// initializes the SPI
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// and sets internal state
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void DAC8552::begin()
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{
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pinMode(_select, OUTPUT);
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digitalWrite(_select, HIGH);
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_spi_settings = SPISettings(_SPIspeed, MSBFIRST, SPI_MODE1);
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if(_hwSPI)
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{
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// _mySPI->end();
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// _mySPI->begin();
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// delay(1);
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}
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else // SOFTWARE SPI
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{
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pinMode(_dataOut, OUTPUT);
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pinMode(_clock, OUTPUT);
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digitalWrite(_dataOut, LOW);
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digitalWrite(_clock, LOW);
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}
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_value[0] = 0;
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_value[1] = 0;
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_register[0] = 0x00;
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_register[1] = 0x04; // set BUFFER SELECT to 1
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}
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// channel = 0, 1, 2, 3 depending on type
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// value = 0..65535
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void DAC8552::bufferValue(uint8_t channel, uint16_t value)
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{
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_value[channel] = value;
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updateDevice(channel, false);
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}
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// channel = 0, 1, 2, 3 depending on type
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// value = 0..65535
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void DAC8552::setValue(uint8_t channel, uint16_t value)
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{
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_value[channel] = value;
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updateDevice(channel, true);
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}
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// channel = 0, 1, 2, 3 depending on type
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// returns 0..65535
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uint16_t DAC8552::getValue(uint8_t channel)
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{
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return _value[channel];
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}
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void DAC8552::bufferPowerDown(uint8_t channel, uint8_t powerDownMode)
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{
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_register[channel] &= 0xFC;
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_register[channel] |= (powerDownMode & 0x03);
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updateDevice(channel, false);
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}
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void DAC8552::setPowerDown(uint8_t channel, uint8_t powerDownMode)
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{
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_register[channel] &= 0xFC;
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_register[channel] |= (powerDownMode & 0x03);
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updateDevice(channel, true);
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}
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uint8_t DAC8552::getPowerDownMode(uint8_t channel)
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{
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return _register[channel] & 0x03;
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}
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void DAC8552::setSPIspeed(uint32_t speed)
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{
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_SPIspeed = speed;
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_spi_settings = SPISettings(_SPIspeed, MSBFIRST, SPI_MODE1);
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};
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//////////////////////////////////////////////////////////////////
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//
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// PROTECTED
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//
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// channel = 0, 1, 2, 3 depending on type
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// direct = true ==> write buffers to both channel A and channel B
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// direct = false ==> buffer value
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void DAC8552::updateDevice(uint8_t channel, bool directWrite)
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{
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uint8_t configRegister = _register[channel];
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if (directWrite) configRegister |= 0x30;
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digitalWrite(_select, LOW);
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if (_hwSPI)
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{
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_mySPI->beginTransaction(_spi_settings);
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_mySPI->transfer(configRegister);
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_mySPI->transfer(_value[channel] >> 8);
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_mySPI->transfer(_value[channel] & 0xFF);
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_mySPI->endTransaction();
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}
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else // Software SPI
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{
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swSPI_transfer(configRegister);
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swSPI_transfer(_value[channel] >> 8);
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swSPI_transfer(_value[channel] & 0xFF);
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}
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digitalWrite(_select, HIGH);
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}
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// simple one mode version
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void DAC8552::swSPI_transfer(uint8_t value)
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{
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uint8_t clk = _clock;
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uint8_t dao = _dataOut;
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for (uint8_t mask = 0x80; mask; mask >>= 1)
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{
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digitalWrite(dao,(value & mask));
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digitalWrite(clk, HIGH);
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digitalWrite(clk, LOW);
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}
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}
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/////////////////////////////////////////////////////////
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//
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// DERIVED CLASSES DAC8532
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//
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DAC8532::DAC8532(uint8_t select, __SPI_CLASS__ * spi) : DAC8552(select, spi)
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{
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}
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DAC8532::DAC8532(uint8_t select, uint8_t spiData, uint8_t spiClock)
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: DAC8552(select, spiData, spiClock)
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{
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}
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// -- END OF FILE --
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