A library for ADS1015 and ADS1115 from Texas Instruments.
Fork of ADS1015 by
v1.3 - Added ADS1115_REG_CONFIG_DR & m_dataRate Jul 21. 2014 - Corrected m_conversionDelay - Now there is readADC() that returns counts and readADC_V() that returns voltage
Diff: Adafruit_ADS1015.h
- Revision:
- 2:976073ea60df
- Parent:
- 1:a628fdaed351
--- a/Adafruit_ADS1015.h Wed May 21 13:12:24 2014 +0000 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,151 +0,0 @@ -/**************************************************************************/ -/*! - @file Adafruit_ADS1015.h - @author K. Townsend (Adafruit Industries) - @license BSD (see LICENSE.txt) - - Ported to mbed by Arve Seljebu - arve0.github.io - - This is a library for the Adafruit ADS1015 breakout board - ----> https://www.adafruit.com/products/1083 - - Adafruit invests time and resources providing this open source code, - please support Adafruit and open-source hardware by purchasing - products from Adafruit! - - @section HISTORY - - v1.0 - First release - v1.1 - Added ADS1115 support - W. Earl - v1.1.1 - Ported to mbed - Arve Seljebu - v1.2 - Fixed error in readADC_SingleEnded() sign bit - Sam Berjawi -*/ -/**************************************************************************/ - -#include <mbed.h> - -/*========================================================================= - I2C ADDRESS/BITS - -----------------------------------------------------------------------*/ - #define ADS1015_ADDRESS (0x48) // 1001 000 (ADDR = GND) -/*=========================================================================*/ - -/*========================================================================= - CONVERSION DELAY (in mS) - -----------------------------------------------------------------------*/ - #define ADS1015_CONVERSIONDELAY (1) - #define ADS1115_CONVERSIONDELAY (8) -/*=========================================================================*/ - -/*========================================================================= - POINTER REGISTER - -----------------------------------------------------------------------*/ - #define ADS1015_REG_POINTER_MASK (0x03) - #define ADS1015_REG_POINTER_CONVERT (0x00) - #define ADS1015_REG_POINTER_CONFIG (0x01) - #define ADS1015_REG_POINTER_LOWTHRESH (0x02) - #define ADS1015_REG_POINTER_HITHRESH (0x03) -/*=========================================================================*/ - -/*========================================================================= - CONFIG REGISTER - -----------------------------------------------------------------------*/ - #define ADS1015_REG_CONFIG_OS_MASK (0x8000) - #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) - #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) - #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) - #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) - #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) - #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) - #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) - #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) -/*=========================================================================*/ - -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; - -class Adafruit_ADS1015 -{ -protected: - // Instance-specific properties - uint8_t m_i2cAddress; - uint8_t m_conversionDelay; - uint8_t m_bitShift; - adsGain_t m_gain; - I2C* m_i2c; - - - public: - Adafruit_ADS1015(I2C* i2c = 0, uint8_t i2cAddress = ADS1015_ADDRESS); // set i2c adress = 0 to allow ADS1115 to use this as default constructor - 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: - uint16_t readRegister(uint8_t i2cAddress, uint8_t reg); - void writeRegister(uint8_t i2cAddress, uint8_t reg, uint16_t value); -}; - -// Derive from ADS1105 & override construction to set properties -class Adafruit_ADS1115 : public Adafruit_ADS1015 -{ - public: - Adafruit_ADS1115(I2C* i2c, uint8_t i2cAddress = ADS1015_ADDRESS); - - private: -}; \ No newline at end of file