Revision 7:653f782ce3aa, committed 2019-03-12

Comitter:

hisyamfs

Date:

Tue Mar 12 13:38:55 2019 +0000

Parent:

6:441bc773778a

Commit message:

percepat data rate dari ADS1115, menjadi 860 SPS, belum ditest

Changed in this revision

--- a/Adafruit_ADS1015.cpp	Mon Feb 25 15:50:05 2019 +0000
+++ b/Adafruit_ADS1015.cpp	Tue Mar 12 13:38:55 2019 +0000
@@ -3,28 +3,28 @@
     @file     Adafruit_ADS1015.cpp
     @author   K.Townsend (Adafruit Industries)
     @license  BSD (see LICENSE.txt)
-
+ 
     Ported to mbed by Arve Seljebu - arve0.github.io
-
+ 
     Driver for the ADS1015/ADS1115 ADC
-
+ 
     This is a library for the Adafruit MPL115A2 breakout
     ----> 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
     v1.1.1 - Ported to mbed
 */
 /**************************************************************************/
-
+ 
 #include <mbed.h>
-#include "Adafruit_ADS1015.h"
-
+#include "Adafruit_ADS1015.h "
+ 
 /**************************************************************************/
 /*!
     @brief  Writes 16-bits to the specified destination register
@@ -38,7 +38,7 @@
     cmd[2] = (char)(value & 0xFF);
     m_i2c->write(i2cAddress, cmd, 3);
 }
-
+ 
 /**************************************************************************/
 /*!
     @brief  Reads 16-bits from the specified register
@@ -48,11 +48,11 @@
 {
     char data[2];
     data[0] = reg; // temporary use this to send address to conversion register
-    m_i2c->write(i2cAddress, data, 1);
+    m_i2c->write(i2cAddress, data, 1, 1); // no stop
     m_i2c->read(i2cAddress, data, 2);
     return (data[0] << 8 | data [1]);
 }
-
+ 
 /**************************************************************************/
 /*!
     @brief  Instantiates a new ADS1015 class w/appropriate properties
@@ -62,13 +62,12 @@
 {
     // shift 7 bit address 1 left: read expects 8 bit address, see I2C.h
     m_i2cAddress = i2cAddress << 1;
-    m_conversionDelay = ADS1015_CONVERSIONDELAY;
+    m_conversionDelay = ADS1115_CONVERSIONDELAY_860SPS;
     m_bitShift = 4;
     m_gain = GAIN_TWOTHIRDS; /* +/- 6.144V range (limited to VDD +0.3V max!) */
-//    m_gain = GAIN_TWO; /* +/- 2.048V range (limited to VDD +0.3V max!) */
     m_i2c = i2c;
 }
-
+ 
 /**************************************************************************/
 /*!
     @brief  Instantiates a new ADS1115 class w/appropriate properties
@@ -78,13 +77,12 @@
 {
     // shift 7 bit address 1 left: read expects 8 bit address, see mbed's I2C.h
     m_i2cAddress = i2cAddress << 1;
-    m_conversionDelay = ADS1115_CONVERSIONDELAY;
+    m_conversionDelay = ADS1115_CONVERSIONDELAY_860SPS;
     m_bitShift = 0;
     m_gain = GAIN_TWOTHIRDS; /* +/- 6.144V range (limited to VDD +0.3V max!) */
-//    m_gain = GAIN_TWO; /* +/- 2.048V range (limited to VDD +0.3V max!) */
     m_i2c = i2c;
 }
-
+ 
 /**************************************************************************/
 /*!
     @brief  Sets the gain and input voltage range
@@ -94,7 +92,7 @@
 {
     m_gain = gain;
 }
-
+ 
 /**************************************************************************/
 /*!
     @brief  Gets a gain and input voltage range
@@ -104,7 +102,7 @@
 {
     return m_gain;
 }
-
+ 
 /**************************************************************************/
 /*!
     @brief  Gets a single-ended ADC reading from the specified channel
@@ -115,18 +113,18 @@
     if (channel > 3) {
         return 0;
     }
-
+ 
     // Start with default values
     uint16_t config = ADS1015_REG_CONFIG_CQUE_NONE    | // Disable the comparator (default val)
                       ADS1015_REG_CONFIG_CLAT_NONLAT  | // Non-latching (default val)
                       ADS1015_REG_CONFIG_CPOL_ACTVLOW | // Alert/Rdy active low   (default val)
                       ADS1015_REG_CONFIG_CMODE_TRAD   | // Traditional comparator (default val)
-                      ADS1015_REG_CONFIG_DR_1600SPS   | // 1600(ADS1015) or 250(ADS1115) samples per second (default)
+                      ADS1115_REG_CONFIG_DR_860SPS    | // 860 Samples per Second, ADS1115
                       ADS1015_REG_CONFIG_MODE_SINGLE;   // Single-shot mode (default)
-
+ 
     // Set PGA/voltage range
     config |= m_gain;
-
+ 
     // Set single-ended input channel
     switch (channel) {
         case (0):
@@ -142,21 +140,21 @@
             config |= ADS1015_REG_CONFIG_MUX_SINGLE_3;
             break;
     }
-
+ 
     // Set 'start single-conversion' bit
     config |= ADS1015_REG_CONFIG_OS_SINGLE;
-
+ 
     // Write config register to the ADC
     writeRegister(m_i2cAddress, ADS1015_REG_POINTER_CONFIG, config);
-
+ 
     // Wait for the conversion to complete
     wait_ms(m_conversionDelay);
-
+ 
     // Read the conversion results
     // Shift 12-bit results right 4 bits for the ADS1015
-    return readRegister(m_i2cAddress, ADS1015_REG_POINTER_CONVERT) >> m_bitShift;
+    return readRegister(m_i2cAddress, ADS1015_REG_POINTER_CONVERT);
 }
-
+ 
 /**************************************************************************/
 /*!
     @brief  Reads the conversion results, measuring the voltage
@@ -174,22 +172,22 @@
                       ADS1015_REG_CONFIG_CMODE_TRAD   | // Traditional comparator (default val)
                       ADS1015_REG_CONFIG_DR_1600SPS   | // 1600(ADS1015) or 250(ADS1115) samples per second (default)
                       ADS1015_REG_CONFIG_MODE_SINGLE;   // Single-shot mode (default)
-
+ 
     // Set PGA/voltage range
     config |= m_gain;
-
+ 
     // Set channels
     config |= ADS1015_REG_CONFIG_MUX_DIFF_0_1;          // AIN0 = P, AIN1 = N
-
+ 
     // Set 'start single-conversion' bit
     config |= ADS1015_REG_CONFIG_OS_SINGLE;
-
+ 
     // Write config register to the ADC
     writeRegister(m_i2cAddress, ADS1015_REG_POINTER_CONFIG, config);
-
+ 
     // Wait for the conversion to complete
     wait_ms(m_conversionDelay);
-
+ 
     // Read the conversion results
     uint16_t res = readRegister(m_i2cAddress, ADS1015_REG_POINTER_CONVERT) >> m_bitShift;
     if (m_bitShift == 0) {
@@ -204,7 +202,7 @@
         return (int16_t)res;
     }
 }
-
+ 
 /**************************************************************************/
 /*!
     @brief  Reads the conversion results, measuring the voltage
@@ -222,22 +220,22 @@
                       ADS1015_REG_CONFIG_CMODE_TRAD   | // Traditional comparator (default val)
                       ADS1015_REG_CONFIG_DR_1600SPS   | // 1600(ADS1015) or 250(ADS1115) samples per second (default)
                       ADS1015_REG_CONFIG_MODE_SINGLE;   // Single-shot mode (default)
-
+ 
     // Set PGA/voltage range
     config |= m_gain;
-
+ 
     // Set channels
     config |= ADS1015_REG_CONFIG_MUX_DIFF_2_3;          // AIN2 = P, AIN3 = N
-
+ 
     // Set 'start single-conversion' bit
     config |= ADS1015_REG_CONFIG_OS_SINGLE;
-
+ 
     // Write config register to the ADC
     writeRegister(m_i2cAddress, ADS1015_REG_POINTER_CONFIG, config);
-
+ 
     // Wait for the conversion to complete
     wait_ms(m_conversionDelay);
-
+ 
     // Read the conversion results
     uint16_t res = readRegister(m_i2cAddress, ADS1015_REG_POINTER_CONVERT) >> m_bitShift;
     if (m_bitShift == 0) {
@@ -252,13 +250,13 @@
         return (int16_t)res;
     }
 }
-
+ 
 /**************************************************************************/
 /*!
     @brief  Sets up the comparator to operate in basic mode, causing the
             ALERT/RDY pin to assert (go from high to low) when the ADC
             value exceeds the specified threshold.
-
+ 
             This will also set the ADC in continuous conversion mode.
 */
 /**************************************************************************/
@@ -272,10 +270,10 @@
                       ADS1015_REG_CONFIG_DR_1600SPS   | // 1600(ADS1015) or 250(ADS1115) samples per second (default)
                       ADS1015_REG_CONFIG_MODE_CONTIN  | // Continuous conversion mode
                       ADS1015_REG_CONFIG_MODE_CONTIN;   // Continuous conversion mode
-
+ 
     // Set PGA/voltage range
     config |= m_gain;
-
+ 
     // Set single-ended input channel
     switch (channel) {
         case (0):
@@ -291,15 +289,15 @@
             config |= ADS1015_REG_CONFIG_MUX_SINGLE_3;
             break;
     }
-
+ 
     // Set the high threshold register
     // Shift 12-bit results left 4 bits for the ADS1015
     writeRegister(m_i2cAddress, ADS1015_REG_POINTER_HITHRESH, threshold << m_bitShift);
-
+ 
     // Write config register to the ADC
     writeRegister(m_i2cAddress, ADS1015_REG_POINTER_CONFIG, config);
 }
-
+ 
 /**************************************************************************/
 /*!
     @brief  In order to clear the comparator, we need to read the
@@ -311,7 +309,7 @@
 {
     // Wait for the conversion to complete
     wait_ms(m_conversionDelay);
-
+ 
     // Read the conversion results
     uint16_t res = readRegister(m_i2cAddress, ADS1015_REG_POINTER_CONVERT) >> m_bitShift;
     if (m_bitShift == 0) {

--- a/Adafruit_ADS1015.h	Mon Feb 25 15:50:05 2019 +0000
+++ b/Adafruit_ADS1015.h	Tue Mar 12 13:38:55 2019 +0000
@@ -5,37 +5,37 @@
     @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)
+    #define ADS1115_CONVERSIONDELAY_860SPS         (2)
 /*=========================================================================*/
-
+ 
 /*=========================================================================
     POINTER REGISTER
     -----------------------------------------------------------------------*/
@@ -45,7 +45,7 @@
     #define ADS1015_REG_POINTER_LOWTHRESH   (0x02)
     #define ADS1015_REG_POINTER_HITHRESH    (0x03)
 /*=========================================================================*/
-
+ 
 /*=========================================================================
     CONFIG REGISTER
     -----------------------------------------------------------------------*/
@@ -53,7 +53,7 @@
     #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
@@ -63,7 +63,7 @@
     #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
@@ -71,11 +71,11 @@
     #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
@@ -84,26 +84,27 @@
     #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 ADS1115_REG_CONFIG_DR_860SPS    (0x00E0)  // 860 samples per second - ADS1115
+ 
     #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 asser
+ 
+    #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,
@@ -112,7 +113,7 @@
     GAIN_EIGHT        = ADS1015_REG_CONFIG_PGA_0_512V,
     GAIN_SIXTEEN      = ADS1015_REG_CONFIG_PGA_0_256V
 } adsGain_t;
-
+ 
 class Adafruit_ADS1015
 {
 protected:
@@ -122,8 +123,8 @@
     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);
@@ -133,17 +134,17 @@
     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