A library for ADS1015 and ADS1115 from Texas Instruments.
Fork of ADS1015 by
Diff: Adafruit_ADS1015.h
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/Adafruit_ADS1015.h Sun Nov 10 18:22:27 2013 +0000 @@ -0,0 +1,150 @@ +/**************************************************************************/ +/*! + @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 +*/ +/**************************************************************************/ + +#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