mirror of
https://github.com/RobTillaart/Arduino.git
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427 lines
8.0 KiB
C++
427 lines
8.0 KiB
C++
//
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// FILE: AD568X.cpp
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// AUTHOR: Rob Tillaart
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// VERSION: 0.1.0
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// DATE: 2023-09-18
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// PURPOSE: Arduino library for AD568X series Digital Analog Convertor.
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#include "AD568X.h"
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// not all "commands" implemented
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#define AD568X_REG_NOP 0x00
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#define AD568X_REG_WRITE 0x10
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#define AD568X_REG_UPDATE 0x20
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#define AD568X_REG_WRITE_UPDATE 0x30
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#define AD568X_REG_CONTROL 0x40
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AD568X::AD568X(uint8_t slaveSelect)
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{
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_hwSPI = true;
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_select = slaveSelect;
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_value = 0;
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}
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AD568X::AD568X(uint8_t spiData, uint8_t spiClock, uint8_t slaveSelect)
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{
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_hwSPI = false;
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_dataOut = spiData;
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_clock = spiClock;
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_select = slaveSelect;
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_value = 0;
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}
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// initializes the SPI
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// and sets internal state
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void AD568X::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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#if defined(ESP32)
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if (_useHSPI) // HSPI
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{
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mySPI = new SPIClass(HSPI);
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mySPI->end();
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mySPI->begin(14, 12, 13, _select); // CLK=14 MISO=12 MOSI=13
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}
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else // VSPI
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{
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mySPI = new SPIClass(VSPI);
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mySPI->end();
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mySPI->begin(18, 19, 23, _select); // CLK=18 MISO=19 MOSI=23
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}
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#else // generic hardware SPI
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mySPI = &SPI;
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mySPI->end();
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mySPI->begin();
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#endif
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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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}
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uint8_t AD568X::getType()
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{
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return _type;
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}
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void AD568X::setLDACPin(uint8_t ldac)
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{
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_ldac = ldac;
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pinMode(_ldac, OUTPUT);
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digitalWrite(_ldac, HIGH);
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}
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bool AD568X::triggerLDAC()
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{
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if (_ldac == 255) return false;
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digitalWrite(_ldac, LOW);
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digitalWrite(_ldac, HIGH);
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return true;
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}
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// value = 0..65535 (16 bit), 16383 (14 bit), 4095 (12 bit) depending on type)
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bool AD568X::setValue(uint16_t value)
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{
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if ((_type == 12) && (value > 4095)) return false;
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if ((_type == 14) && (value > 16383)) return false;
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_value = value;
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updateDevice(AD568X_REG_WRITE_UPDATE, value);
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return true;
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}
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// returns 0..65535 (16 bit), 16383 (14 bit), 4095 (12 bit) depending on type)
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uint16_t AD568X::getValue()
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{
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return _value;
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}
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bool AD568X::setPercentage(float percentage)
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{
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uint16_t value = 0;
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if ((percentage < 0) || (percentage > 100)) return false;
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if (_type == 16) value = round(655.35 * percentage);
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else if (_type == 14) value = round(163.83 * percentage);
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else /* type = 12 */ value = round( 40.95 * percentage);
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return setValue(value);
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}
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float AD568X::getPercentage()
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{
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float value = getValue();
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if (value > 0)
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{
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if (_type == 16) return value * ( 1.0 / 655.35);
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if (_type == 14) return value * ( 1.0 / 163.83);
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if (_type == 12) return value * ( 1.0 / 40.95);
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}
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return 0;
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}
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bool AD568X::prepareValue(uint16_t value)
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{
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if ((_type == 12) && (value > 4095)) return false;
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if ((_type == 14) && (value > 16383)) return false;
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_value = value;
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updateDevice(AD568X_REG_WRITE, value);
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return true;
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}
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bool AD568X::updateValue()
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{
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updateDevice(AD568X_REG_UPDATE, 0);
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return true;
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}
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//////////////////////////////////////////////////////////////////
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//
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// CONTROL REGISTER
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//
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bool AD568X::setControlRegister(uint16_t value)
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{
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_controlReg = value & 0xFC00;
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updateDevice(AD568X_REG_CONTROL, _controlReg);
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return true;
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}
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bool AD568X::reset()
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{
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_controlReg |= (1 << 15); // set RESET bit
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updateDevice(AD568X_REG_CONTROL, _controlReg);
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_controlReg = 0x0000;
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return true;
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}
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bool AD568X::setPowerDownMode(uint8_t mode)
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{
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if (mode > 3) return false;
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_controlReg &= 0x9C00; // clear PD bits
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_controlReg |= (mode << 13);
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updateDevice(AD568X_REG_CONTROL, _controlReg);
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return true;
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}
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bool AD568X::disableReference(bool b)
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{
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_controlReg &= 0xEC00; // clear REF bit
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if (b) _controlReg |= (1 << 12);
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updateDevice(AD568X_REG_CONTROL, _controlReg);
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return true;
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}
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bool AD568X::enableGain(bool enable)
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{
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_controlReg &= 0xF400; // clear GAIN bit
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if (enable) _controlReg |= (1 << 11);
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updateDevice(AD568X_REG_CONTROL, _controlReg);
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return true;
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}
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bool AD568X::enableDaisyChain(bool enable)
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{
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_controlReg &= 0xF800; // clear DCEN bit
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if (enable) _controlReg |= (1 << 10);
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updateDevice(AD568X_REG_CONTROL, _controlReg);
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return true;
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}
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//////////////////////////////////////////////////////////////////
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//
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// SPI
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//
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void AD568X::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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uint32_t AD568X::getSPIspeed()
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{
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return _SPIspeed;
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};
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bool AD568X::usesHWSPI()
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{
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return _hwSPI;
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}
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// ESP32 specific
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#if defined(ESP32)
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void AD568X::selectHSPI()
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{
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_useHSPI = true;
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}
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void AD568X::selectVSPI()
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{
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_useHSPI = false;
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}
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bool AD568X::usesHSPI()
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{
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return _useHSPI;
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}
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bool AD568X::usesVSPI()
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{
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return !_useHSPI;
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}
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void AD568X::setGPIOpins(uint8_t clk, uint8_t miso, uint8_t mosi, uint8_t select)
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{
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_clock = clk;
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_dataOut = mosi;
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_select = select;
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pinMode(_select, OUTPUT);
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digitalWrite(_select, HIGH);
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mySPI->end(); // disable SPI
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mySPI->begin(clk, miso, mosi, select); // enable SPI
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}
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#endif
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//////////////////////////////////////////////////////////////////
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//
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// PRIVATE
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//
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void AD568X::updateDevice(uint8_t cmd, uint16_t value)
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{
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// to be optimized - switch cmd etc
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uint8_t a = cmd | (value >> 12);
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uint8_t b = (value >> 4) & 0xFF;
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uint8_t c = (value << 4) & 0xF0;
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updateDevice(a, b, c);
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}
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void AD568X::updateDevice(uint8_t a, uint8_t b, uint8_t c)
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{
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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(a);
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mySPI->transfer(b);
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mySPI->transfer(c);
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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(a);
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swSPI_transfer(b);
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swSPI_transfer(c);
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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 AD568X::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 AD5680
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//
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// AD5680::AD5680(uint8_t slaveSelect) : AD568X(slaveSelect)
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// {
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// _type = 18;
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// _value = 0;
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// }
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// AD5680::AD5680(uint8_t spiData, uint8_t spiClock, uint8_t slaveSelect)
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// : AD568X(spiData, spiClock, slaveSelect)
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// {
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// _type = 18;
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// _value = 0;
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// }
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/////////////////////////////////////////////////////////////////////////////
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//
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// DERIVED AD5681
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//
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AD5681R::AD5681R(uint8_t slaveSelect) : AD568X(slaveSelect)
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{
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_type = 12;
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_value = 0;
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}
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AD5681R::AD5681R(uint8_t spiData, uint8_t spiClock, uint8_t slaveSelect)
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: AD568X(spiData, spiClock, slaveSelect)
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{
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_type = 12;
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_value = 0;
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}
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/////////////////////////////////////////////////////////////////////////////
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//
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// DERIVED AD5682
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//
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AD5682R::AD5682R(uint8_t slaveSelect) : AD568X(slaveSelect)
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{
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_type = 14;
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_value = 0;
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}
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AD5682R::AD5682R(uint8_t spiData, uint8_t spiClock, uint8_t slaveSelect)
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: AD568X(spiData, spiClock, slaveSelect)
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{
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_type = 14;
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_value = 0;
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}
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/////////////////////////////////////////////////////////////////////////////
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//
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// DERIVED AD5683
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//
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AD5683R::AD5683R(uint8_t slaveSelect) : AD568X(slaveSelect)
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{
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_type = 16;
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_value = 0;
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}
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AD5683R::AD5683R(uint8_t spiData, uint8_t spiClock, uint8_t slaveSelect)
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: AD568X(spiData, spiClock, slaveSelect)
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{
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_type = 16;
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_value = 0;
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}
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/////////////////////////////////////////////////////////////////////////////
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//
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// DERIVED AD5683
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//
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AD5683::AD5683(uint8_t slaveSelect) : AD568X(slaveSelect)
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{
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_type = 16;
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_value = 0;
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}
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AD5683::AD5683(uint8_t spiData, uint8_t spiClock, uint8_t slaveSelect)
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: AD568X(spiData, spiClock, slaveSelect)
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{
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_type = 16;
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_value = 0;
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}
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// -- END OF FILE --
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