177 lines
8.1 KiB
C++
177 lines
8.1 KiB
C++
/**************************************************************************/
|
|
/*!
|
|
@file Adafruit_ADS1015.h
|
|
|
|
This is a library for the Adafruit ADS1X15 ADC breakout boards.
|
|
|
|
Adafruit invests time and resources providing this open source code,
|
|
please support Adafruit and open-source hardware by purchasing
|
|
products from Adafruit!
|
|
|
|
Written by Kevin "KTOWN" Townsend for Adafruit Industries.
|
|
|
|
BSD license, all text here must be included in any redistribution
|
|
*/
|
|
/**************************************************************************/
|
|
|
|
#ifndef __ADS1015_H__
|
|
#define __ADS1015_H__
|
|
|
|
#if ARDUINO >= 100
|
|
#include "Arduino.h"
|
|
#else
|
|
#include "WProgram.h"
|
|
#endif
|
|
|
|
#include <Wire.h>
|
|
|
|
/*=========================================================================
|
|
I2C ADDRESS/BITS
|
|
-----------------------------------------------------------------------*/
|
|
#define ADS1015_ADDRESS (0x48) ///< 1001 000 (ADDR = GND)
|
|
/*=========================================================================*/
|
|
|
|
/*=========================================================================
|
|
CONVERSION DELAY (in mS)
|
|
-----------------------------------------------------------------------*/
|
|
#define ADS1015_CONVERSIONDELAY (1) ///< Conversion delay
|
|
#define ADS1115_CONVERSIONDELAY (9) ///< Conversion delay
|
|
/*=========================================================================*/
|
|
|
|
/*=========================================================================
|
|
POINTER REGISTER
|
|
-----------------------------------------------------------------------*/
|
|
#define ADS1015_REG_POINTER_MASK (0x03) ///< Point mask
|
|
#define ADS1015_REG_POINTER_CONVERT (0x00) ///< Conversion
|
|
#define ADS1015_REG_POINTER_CONFIG (0x01) ///< Configuration
|
|
#define ADS1015_REG_POINTER_LOWTHRESH (0x02) ///< Low threshold
|
|
#define ADS1015_REG_POINTER_HITHRESH (0x03) ///< High threshold
|
|
/*=========================================================================*/
|
|
|
|
/*=========================================================================
|
|
CONFIG REGISTER
|
|
-----------------------------------------------------------------------*/
|
|
#define ADS1015_REG_CONFIG_OS_MASK (0x8000) ///< OS Mask
|
|
#define ADS1015_REG_CONFIG_OS_SINGLE \
|
|
(0x8000) ///< Write: Set to start a single-conversion
|
|
#define ADS1015_REG_CONFIG_OS_BUSY \
|
|
(0x0000) ///< Read: Bit = 0 when conversion is in progress
|
|
#define ADS1015_REG_CONFIG_OS_NOTBUSY \
|
|
(0x8000) ///< Read: Bit = 1 when device is not performing a conversion
|
|
|
|
#define ADS1015_REG_CONFIG_MUX_MASK (0x7000) ///< Mux Mask
|
|
#define ADS1015_REG_CONFIG_MUX_DIFF_0_1 \
|
|
(0x0000) ///< Differential P = AIN0, N = AIN1 (default)
|
|
#define ADS1015_REG_CONFIG_MUX_DIFF_0_3 \
|
|
(0x1000) ///< Differential P = AIN0, N = AIN3
|
|
#define ADS1015_REG_CONFIG_MUX_DIFF_1_3 \
|
|
(0x2000) ///< Differential P = AIN1, N = AIN3
|
|
#define ADS1015_REG_CONFIG_MUX_DIFF_2_3 \
|
|
(0x3000) ///< Differential P = AIN2, N = AIN3
|
|
#define ADS1015_REG_CONFIG_MUX_SINGLE_0 (0x4000) ///< Single-ended AIN0
|
|
#define ADS1015_REG_CONFIG_MUX_SINGLE_1 (0x5000) ///< Single-ended AIN1
|
|
#define ADS1015_REG_CONFIG_MUX_SINGLE_2 (0x6000) ///< Single-ended AIN2
|
|
#define ADS1015_REG_CONFIG_MUX_SINGLE_3 (0x7000) ///< Single-ended AIN3
|
|
|
|
#define ADS1015_REG_CONFIG_PGA_MASK (0x0E00) ///< PGA Mask
|
|
#define ADS1015_REG_CONFIG_PGA_6_144V (0x0000) ///< +/-6.144V range = Gain 2/3
|
|
#define ADS1015_REG_CONFIG_PGA_4_096V (0x0200) ///< +/-4.096V range = Gain 1
|
|
#define ADS1015_REG_CONFIG_PGA_2_048V \
|
|
(0x0400) ///< +/-2.048V range = Gain 2 (default)
|
|
#define ADS1015_REG_CONFIG_PGA_1_024V (0x0600) ///< +/-1.024V range = Gain 4
|
|
#define ADS1015_REG_CONFIG_PGA_0_512V (0x0800) ///< +/-0.512V range = Gain 8
|
|
#define ADS1015_REG_CONFIG_PGA_0_256V (0x0A00) ///< +/-0.256V range = Gain 16
|
|
|
|
#define ADS1015_REG_CONFIG_MODE_MASK (0x0100) ///< Mode Mask
|
|
#define ADS1015_REG_CONFIG_MODE_CONTIN (0x0000) ///< Continuous conversion mode
|
|
#define ADS1015_REG_CONFIG_MODE_SINGLE \
|
|
(0x0100) ///< Power-down single-shot mode (default)
|
|
|
|
#define ADS1015_REG_CONFIG_DR_MASK (0x00E0) ///< Data Rate Mask
|
|
#define ADS1015_REG_CONFIG_DR_128SPS (0x0000) ///< 128 samples per second
|
|
#define ADS1015_REG_CONFIG_DR_250SPS (0x0020) ///< 250 samples per second
|
|
#define ADS1015_REG_CONFIG_DR_490SPS (0x0040) ///< 490 samples per second
|
|
#define ADS1015_REG_CONFIG_DR_920SPS (0x0060) ///< 920 samples per second
|
|
#define ADS1015_REG_CONFIG_DR_1600SPS \
|
|
(0x0080) ///< 1600 samples per second (default)
|
|
#define ADS1015_REG_CONFIG_DR_2400SPS (0x00A0) ///< 2400 samples per second
|
|
#define ADS1015_REG_CONFIG_DR_3300SPS (0x00C0) ///< 3300 samples per second
|
|
|
|
#define ADS1015_REG_CONFIG_CMODE_MASK (0x0010) ///< CMode Mask
|
|
#define ADS1015_REG_CONFIG_CMODE_TRAD \
|
|
(0x0000) ///< Traditional comparator with hysteresis (default)
|
|
#define ADS1015_REG_CONFIG_CMODE_WINDOW (0x0010) ///< Window comparator
|
|
|
|
#define ADS1015_REG_CONFIG_CPOL_MASK (0x0008) ///< CPol Mask
|
|
#define ADS1015_REG_CONFIG_CPOL_ACTVLOW \
|
|
(0x0000) ///< ALERT/RDY pin is low when active (default)
|
|
#define ADS1015_REG_CONFIG_CPOL_ACTVHI \
|
|
(0x0008) ///< ALERT/RDY pin is high when active
|
|
|
|
#define ADS1015_REG_CONFIG_CLAT_MASK \
|
|
(0x0004) ///< Determines if ALERT/RDY pin latches once asserted
|
|
#define ADS1015_REG_CONFIG_CLAT_NONLAT \
|
|
(0x0000) ///< Non-latching comparator (default)
|
|
#define ADS1015_REG_CONFIG_CLAT_LATCH (0x0004) ///< Latching comparator
|
|
|
|
#define ADS1015_REG_CONFIG_CQUE_MASK (0x0003) ///< CQue Mask
|
|
#define ADS1015_REG_CONFIG_CQUE_1CONV \
|
|
(0x0000) ///< Assert ALERT/RDY after one conversions
|
|
#define ADS1015_REG_CONFIG_CQUE_2CONV \
|
|
(0x0001) ///< Assert ALERT/RDY after two conversions
|
|
#define ADS1015_REG_CONFIG_CQUE_4CONV \
|
|
(0x0002) ///< Assert ALERT/RDY after four conversions
|
|
#define ADS1015_REG_CONFIG_CQUE_NONE \
|
|
(0x0003) ///< Disable the comparator and put ALERT/RDY in high state (default)
|
|
/*=========================================================================*/
|
|
|
|
/** Gain settings */
|
|
typedef enum {
|
|
GAIN_TWOTHIRDS = ADS1015_REG_CONFIG_PGA_6_144V,
|
|
GAIN_ONE = ADS1015_REG_CONFIG_PGA_4_096V,
|
|
GAIN_TWO = ADS1015_REG_CONFIG_PGA_2_048V,
|
|
GAIN_FOUR = ADS1015_REG_CONFIG_PGA_1_024V,
|
|
GAIN_EIGHT = ADS1015_REG_CONFIG_PGA_0_512V,
|
|
GAIN_SIXTEEN = ADS1015_REG_CONFIG_PGA_0_256V
|
|
} adsGain_t;
|
|
|
|
/**************************************************************************/
|
|
/*!
|
|
@brief Sensor driver for the Adafruit ADS1015 ADC breakout.
|
|
*/
|
|
/**************************************************************************/
|
|
class Adafruit_ADS1015 {
|
|
protected:
|
|
// Instance-specific properties
|
|
uint8_t m_i2cAddress; ///< the I2C address
|
|
uint8_t m_conversionDelay; ///< conversion deay
|
|
uint8_t m_bitShift; ///< bit shift amount
|
|
adsGain_t m_gain; ///< ADC gain
|
|
|
|
public:
|
|
Adafruit_ADS1015(uint8_t i2cAddress = ADS1015_ADDRESS);
|
|
void begin(void);
|
|
uint16_t readADC_SingleEnded(uint8_t channel);
|
|
int16_t readADC_Differential_0_1(void);
|
|
int16_t readADC_Differential_2_3(void);
|
|
void startComparator_SingleEnded(uint8_t channel, int16_t threshold);
|
|
int16_t getLastConversionResults();
|
|
void setGain(adsGain_t gain);
|
|
adsGain_t getGain(void);
|
|
|
|
private:
|
|
};
|
|
|
|
/**************************************************************************/
|
|
/*!
|
|
@brief Sensor driver for the Adafruit ADS1115 ADC breakout.
|
|
*/
|
|
/**************************************************************************/
|
|
class Adafruit_ADS1115 : public Adafruit_ADS1015 {
|
|
public:
|
|
Adafruit_ADS1115(uint8_t i2cAddress = ADS1015_ADDRESS);
|
|
|
|
private:
|
|
};
|
|
|
|
#endif |