Diff: Adafruit_ADS1015.h

Revision:

0:8174d9ceeca1

Child:

2:d864e21d4e58

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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:
+};
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