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ADS1115.cs
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/***********************************************************************************************
* Based on https://github.com/adafruit/Adafruit_ADS1X15/blob/master/Adafruit_ADS1015.cpp
*
*
*
***********************************************************************************************/
using System;
using System.Threading;
namespace i2c
{
// ReSharper disable once InconsistentNaming
internal class ADS1115 : ADS1115Base
{
public event EventHandler<SingleEndedConversionEventArgs> SingleEndedConversionReading;
public event EventHandler<ConverterMessageEventArgs> Message;
public ADS1115(Action<string> logger, string busid, uint i2CAdd = 0x48) : base(busid, i2CAdd, logger)
{
Console.WriteLine("Constructor. BusAddress: {0} DeviceAddress {1}", busid, GetAsHexString(i2CAdd));
ConversionDelay = GetConstantAsByte("ADS1115_CONVERSIONDELAY");
Console.WriteLine("Conversion Delay from Dictionary. Value: {0} ms", ConversionDelay);
BitShift = 0;
}
internal override void Start()
{
DoWork = true;
Message(this, new ConverterMessageEventArgs { Message = string.Format("Starting Continous Conversion Readings") });
ThreadStart s = () =>
{
Message(this, new ConverterMessageEventArgs { Message = string.Format("Starting Thread Delegate Method") });
//startComparator_SingleEnded(0, 1000); // Read A0 @ 3V
while (DoWork)
{
var data = readADC_SingleEnded(0);
//ushort data = getLastConversionResults();
var _event = new SingleEndedConversionEventArgs { Data = data };
SingleEndedConversionReading(this, _event);
Thread.Sleep(1000);
}
};
var work = new Thread(s);
work.Start();
}
public override ushort readADC_SingleEnded(uint channel)
{
if (channel > 3)
{
return 0;
}
var config = Set_Defaults();
// Set single-ended input channel
switch (channel)
{
case (0):
config |= (uint)GetConstantAsByte("ADS1115_REG_CONFIG_MUX_SINGLE_0");
break;
case (1):
config |= (uint)GetConstantAsByte("ADS1115_REG_CONFIG_MUX_SINGLE_1");
break;
case (2):
config |= (uint)GetConstantAsByte("ADS1115_REG_CONFIG_MUX_SINGLE_2");
break;
case (3):
config |= (uint)GetConstantAsByte("ADS1115_REG_CONFIG_MUX_SINGLE_3");
break;
}
// Set 'start single-conversion' bit
config |= (uint)GetConstantAsByte("ADS1115_REG_CONFIG_OS_SINGLE");
return GetReadingFromConverter(config);
}
private ushort GetReadingFromConverter(uint config)
{
// Write config register to the ADC
Set16(Busid, GetConstantAsString("ADS1115_ADDRESS"), GetConstantAsString("ADS1115_REG_POINTER_CONFIG"), GetAsHexString(config), 0);
// Wait for the conversion to complete
Thread.Sleep(ConversionDelay);
// Read the conversion results
// Shift 12-bit results right 4 bits for the ADS1015
return (UInt16)(GetValue16("ADS1115_ADDRESS", "ADS1115_REG_POINTER_CONVERT") >> BitShift);
}
private static uint Set_Defaults()
{
// Start with default values
var config = (uint)GetConstantAsByte("ADS1115_REG_CONFIG_CQUE_NONE") | // Disable the comparator (default val)
(uint)GetConstantAsByte("ADS1115_REG_CONFIG_CLAT_NONLAT") | // Non-latching (default val)
(uint)GetConstantAsByte("ADS1115_REG_CONFIG_CPOL_ACTVLOW") | // Alert/Rdy active low (default val)
(uint)GetConstantAsByte("ADS1115_REG_CONFIG_CMODE_TRAD") | // Traditional comparator (default val)
(uint)GetConstantAsByte("ADS1115_REG_CONFIG_DR_1600SPS") | // 1600 samples per second (default)
(uint)GetConstantAsByte("ADS1115_REG_CONFIG_MODE_SINGLE"); // Single-shot mode (default)
// Set PGA/voltage range
//config |= (uint)GetConstantAsByte("ADS1115_REG_CONFIG_PGA_6_144V"); // +/- 6.144V range (limited to VDD +0.3V max!)
config |= (uint)GetConstantAsByte("ADS1115_REG_CONFIG_PGA_1_024V");
return config;
}
public override short readADC_Differential_0_1()
{
// Start with default values
var config = Set_Defaults();
// Set channels
config |= (uint)GetConstantAsByte("ADS1115_REG_CONFIG_MUX_DIFF_0_1"); // AIN0 = P, AIN1 = N
// Set 'start single-conversion' bit
config |= (uint)GetConstantAsByte("ADS1115_REG_CONFIG_OS_SINGLE");
return (short)GetReadingFromConverter(config);
}
public override short readADC_Differential_2_3()
{
// Start with default values
var config = Set_Defaults();
// Set channels
config |= (uint)GetConstantAsByte("ADS1015_REG_CONFIG_MUX_DIFF_2_3"); // AIN2 = P, AIN3 = N
// Set 'start single-conversion' bit
config |= (uint)GetConstantAsByte("ADS1015_REG_CONFIG_OS_SINGLE");
return (short)GetReadingFromConverter(config);
}
public override void startComparator_SingleEnded(UInt16 channel, Int16 threshold)
{
Message(this, new ConverterMessageEventArgs { Message = string.Format("Starting Continous Readings. Channel: {0} Threshold {1}", channel, threshold) });
// Start with default values
var config = (uint)GetConstantAsByte("ADS1115_REG_CONFIG_CQUE_1CONV") | // Comparator enabled and asserts on 1 match
(uint)GetConstantAsByte("ADS1115_REG_CONFIG_CLAT_LATCH") | // Latching mode
(uint)GetConstantAsByte("ADS1115_REG_CONFIG_CPOL_ACTVLOW") | // Alert/Rdy active low (default val)
(uint)GetConstantAsByte("ADS1115_REG_CONFIG_CMODE_TRAD") | // Traditional comparator (default val)
(uint)GetConstantAsByte("ADS1115_REG_CONFIG_DR_1600SPS") | // 1600 samples per second (default)
(uint)GetConstantAsByte("ADS1115_REG_CONFIG_MODE_CONTIN") | // Continuous conversion mode
(uint)GetConstantAsByte("ADS1115_REG_CONFIG_PGA_6_144V"); //| // +/- 6.144V range (limited to VDD +0.3V max!)
//(uint)GetConstantAsByte("ADS1115_REG_CONFIG_MODE_CONTIN"); // Continuous conversion mode
// Set single-ended input channel
switch (channel)
{
case (0):
config |= (uint)GetConstantAsByte("ADS1115_REG_CONFIG_MUX_SINGLE_0");
break;
case (1):
config |= (uint)GetConstantAsByte("ADS1115_REG_CONFIG_MUX_SINGLE_1");
break;
case (2):
config |= (uint)GetConstantAsByte("ADS1115_REG_CONFIG_MUX_SINGLE_2");
break;
case (3):
config |= (uint)GetConstantAsByte("ADS1115_REG_CONFIG_MUX_SINGLE_3");
break;
}
// Set the high threshold register
// Shift 12-bit results left 4 bits for the ADS1015
Message(this, new ConverterMessageEventArgs { Message = string.Format("Get Device Address. Address: {0}", GetConstantAsString("ADS1115_ADDRESS"))});
Set16(Busid, GetConstantAsString("ADS1115_ADDRESS"), GetConstantAsString("ADS1115_REG_POINTER_HITHRESH"), GetAsHexString(threshold << BitShift), 0);
// Write config register to the ADC
Set16(Busid, GetConstantAsString("ADS1115_ADDRESS"), GetConstantAsString("ADS1115_REG_POINTER_CONFIG"), GetAsHexString(config), 0);
}
public override ushort GetLastConversionResults()
{
// Wait for the conversion to complete
Thread.Sleep(ConversionDelay);
// Read the conversion results
// Shift 12-bit results right 4 bits for the ADS1015
return (ushort)(GetValue16("ADS1115_ADDRESS", "ADS1115_REG_POINTER_CONVERT") >> BitShift);
}
}
}
///**************************************************************************/
///*!
// @brief Writes 16-bits to the specified destination register
//*/
///**************************************************************************/
//static void writeRegister(uint8_t i2cAddress, uint8_t reg, uint16_t value) {
// Wire.beginTransmission(i2cAddress);
// i2cwrite((uint8_t)reg);
// i2cwrite((uint8_t)(value>>8));
// i2cwrite((uint8_t)(value & 0xFF));
// Wire.endTransmission();
//}
///**************************************************************************/
///*!
// @brief Reads 16-bits from the specified source register
//*/
///**************************************************************************/
//static uint16_t readRegister(uint8_t i2cAddress, uint8_t reg) {
// Wire.beginTransmission(i2cAddress);
// i2cwrite(ADS1015_REG_POINTER_CONVERT);
// Wire.endTransmission();
// Wire.requestFrom(i2cAddress, (uint8_t)2);
// return ((i2cread() << 8) | i2cread());
//}
///**************************************************************************/
///*!
// @brief Gets a single-ended ADC reading from the specified channel
//*/
///**************************************************************************/
//uint16_t Adafruit_ADS1015::readADC_SingleEnded(uint8_t channel) {
// if (channel > 3)
// {
// return 0;
// }
// // Start with default values
// uint16_t config = ADS1015_REG_CONFIG_CQUE_NONE | // Disable the comparator (default val)
// ADS1015_REG_CONFIG_CLAT_NONLAT | // Non-latching (default val)
// ADS1015_REG_CONFIG_CPOL_ACTVLOW | // Alert/Rdy active low (default val)
// ADS1015_REG_CONFIG_CMODE_TRAD | // Traditional comparator (default val)
// ADS1015_REG_CONFIG_DR_1600SPS | // 1600 samples per second (default)
// ADS1015_REG_CONFIG_MODE_SINGLE; // Single-shot mode (default)
// // Set PGA/voltage range
// config |= ADS1015_REG_CONFIG_PGA_6_144V; // +/- 6.144V range (limited to VDD +0.3V max!)
// // Set single-ended input channel
// switch (channel)
// {
// case (0):
// config |= ADS1015_REG_CONFIG_MUX_SINGLE_0;
// break;
// case (1):
// config |= ADS1015_REG_CONFIG_MUX_SINGLE_1;
// break;
// case (2):
// config |= ADS1015_REG_CONFIG_MUX_SINGLE_2;
// break;
// case (3):
// config |= ADS1015_REG_CONFIG_MUX_SINGLE_3;
// break;
// }
// // Set 'start single-conversion' bit
// config |= ADS1015_REG_CONFIG_OS_SINGLE;
// // Write config register to the ADC
// writeRegister(m_i2cAddress, ADS1015_REG_POINTER_CONFIG, config);
// // Wait for the conversion to complete
// delay(m_conversionDelay);
// // Read the conversion results
// // Shift 12-bit results right 4 bits for the ADS1015
// return readRegister(m_i2cAddress, ADS1015_REG_POINTER_CONVERT) >> m_bitShift;
//}
///**************************************************************************/
///*!
// @brief Reads the conversion results, measuring the voltage
// difference between the P (AIN0) and N (AIN1) input. Generates
// a signed value since the difference can be either
// positive or negative.
//*/
///**************************************************************************/
//int16_t Adafruit_ADS1015::readADC_Differential_0_1() {
// // Start with default values
// uint16_t config = ADS1015_REG_CONFIG_CQUE_NONE | // Disable the comparator (default val)
// ADS1015_REG_CONFIG_CLAT_NONLAT | // Non-latching (default val)
// ADS1015_REG_CONFIG_CPOL_ACTVLOW | // Alert/Rdy active low (default val)
// ADS1015_REG_CONFIG_CMODE_TRAD | // Traditional comparator (default val)
// ADS1015_REG_CONFIG_DR_1600SPS | // 1600 samples per second (default)
// ADS1015_REG_CONFIG_MODE_SINGLE; // Single-shot mode (default)
// // Set PGA/voltage range
// config |= ADS1015_REG_CONFIG_PGA_6_144V; // +/- 6.144V range (limited to VDD +0.3V max!)
// // Set channels
// config |= ADS1015_REG_CONFIG_MUX_DIFF_0_1; // AIN0 = P, AIN1 = N
// // Set 'start single-conversion' bit
// config |= ADS1015_REG_CONFIG_OS_SINGLE;
// // Write config register to the ADC
// writeRegister(m_i2cAddress, ADS1015_REG_POINTER_CONFIG, config);
// // Wait for the conversion to complete
// delay(m_conversionDelay);
// // Read the conversion results
// // Shift 12-bit results right 4 bits for the ADS1015
// return (int16_t)(readRegister(m_i2cAddress, ADS1015_REG_POINTER_CONVERT) >> m_bitShift);
//}
///**************************************************************************/
///*!
// @brief Reads the conversion results, measuring the voltage
// difference between the P (AIN2) and N (AIN3) input. Generates
// a signed value since the difference can be either
// positive or negative.
//*/
///**************************************************************************/
//int16_t Adafruit_ADS1015::readADC_Differential_2_3() {
// // Start with default values
// uint16_t config = ADS1015_REG_CONFIG_CQUE_NONE | // Disable the comparator (default val)
// ADS1015_REG_CONFIG_CLAT_NONLAT | // Non-latching (default val)
// ADS1015_REG_CONFIG_CPOL_ACTVLOW | // Alert/Rdy active low (default val)
// ADS1015_REG_CONFIG_CMODE_TRAD | // Traditional comparator (default val)
// ADS1015_REG_CONFIG_DR_1600SPS | // 1600 samples per second (default)
// ADS1015_REG_CONFIG_MODE_SINGLE; // Single-shot mode (default)
// // Set PGA/voltage range
// config |= ADS1015_REG_CONFIG_PGA_6_144V; // +/- 6.144V range (limited to VDD +0.3V max!)
// // Set channels
// config |= ADS1015_REG_CONFIG_MUX_DIFF_2_3; // AIN2 = P, AIN3 = N
// // Set 'start single-conversion' bit
// config |= ADS1015_REG_CONFIG_OS_SINGLE;
// // Write config register to the ADC
// writeRegister(m_i2cAddress, ADS1015_REG_POINTER_CONFIG, config);
// // Wait for the conversion to complete
// delay(m_conversionDelay);
// // Shift 12-bit results right 4 bits for the ADS1015
// return (int16_t)(readRegister(m_i2cAddress, ADS1015_REG_POINTER_CONVERT) >> m_bitShift);
//}
///**************************************************************************/
///*!
// @brief Sets up the comparator to operate in basic mode, causing the
// ALERT/RDY pin to assert (go from high to low) when the ADC
// value exceeds the specified threshold.
// This will also set the ADC in continuous conversion mode.
//*/
///**************************************************************************/
//void Adafruit_ADS1015::startComparator_SingleEnded(uint8_t channel, int16_t threshold)
//{
// uint16_t value;
// // Start with default values
// uint16_t config = ADS1015_REG_CONFIG_CQUE_1CONV | // Comparator enabled and asserts on 1 match
// ADS1015_REG_CONFIG_CLAT_LATCH | // Latching mode
// ADS1015_REG_CONFIG_CPOL_ACTVLOW | // Alert/Rdy active low (default val)
// ADS1015_REG_CONFIG_CMODE_TRAD | // Traditional comparator (default val)
// ADS1015_REG_CONFIG_DR_1600SPS | // 1600 samples per second (default)
// ADS1015_REG_CONFIG_MODE_CONTIN | // Continuous conversion mode
// ADS1015_REG_CONFIG_PGA_6_144V | // +/- 6.144V range (limited to VDD +0.3V max!)
// ADS1015_REG_CONFIG_MODE_CONTIN; // Continuous conversion mode
// // Set single-ended input channel
// switch (channel)
// {
// case (0):
// config |= ADS1015_REG_CONFIG_MUX_SINGLE_0;
// break;
// case (1):
// config |= ADS1015_REG_CONFIG_MUX_SINGLE_1;
// break;
// case (2):
// config |= ADS1015_REG_CONFIG_MUX_SINGLE_2;
// break;
// case (3):
// config |= ADS1015_REG_CONFIG_MUX_SINGLE_3;
// break;
// }
// // Set the high threshold register
// // Shift 12-bit results left 4 bits for the ADS1015
// writeRegister(m_i2cAddress, ADS1015_REG_POINTER_HITHRESH, threshold << m_bitShift);
// // Write config register to the ADC
// writeRegister(m_i2cAddress, ADS1015_REG_POINTER_CONFIG, config);
//}
///**************************************************************************/
///*!
// @brief In order to clear the comparator, we need to read the
// conversion results. This function reads the last conversion
// results without changing the config value.
//*/
///**************************************************************************/
//int16_t Adafruit_ADS1015::getLastConversionResults()
//{
// // Wait for the conversion to complete
// delay(m_conversionDelay);
// // Read the conversion results
// // Shift 12-bit results right 4 bits for the ADS1015
// return (int16_t)(readRegister(m_i2cAddress, ADS1015_REG_POINTER_CONVERT) >> m_bitShift);
//}