this library has few cahnges from the original library, for effects of this work.
Fork of ADS1015 by
Adafruit_ADS1015.h
- Committer:
- FannyCalle
- Date:
- 2018-05-21
- Revision:
- 6:9970e4a3007e
- Parent:
- 4:6445a678d458
File content as of revision 6:9970e4a3007e:
/**************************************************************************/ /*! @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 (0x4A) // 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 - ADS1115 8SPS #define ADS1015_REG_CONFIG_DR_250SPS (0x0020) // 250 samples per second - ADS1115 16SPS #define ADS1015_REG_CONFIG_DR_490SPS (0x0040) // 490 samples per second - ADS1115 32SPS #define ADS1015_REG_CONFIG_DR_920SPS (0x0060) // 920 samples per second - ADS1115 64SPS #define ADS1015_REG_CONFIG_DR_1600SPS (0x0080) // 1600 samples per second - ADS1115 250SPS (default) #define ADS1015_REG_CONFIG_DR_2400SPS (0x00A0) // 2400 samples per second - ADS1115 475SPS #define ADS1015_REG_CONFIG_DR_3300SPS (0x00C0) // 3300 samples per second - ADS1115 860SPS #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: };