PQ_Hybrid_Electrical_Equipment_Team / ADS1015

A library for ADS1015 and ADS1115 from Texas Instruments.

Fork of ADS1015 by Arve Seljebu

Adafruit_ADS1015.cpp@6:71b44421e736, 2016-09-01 (annotated)

Committer:
Gaku0606
Date:
Thu Sep 01 13:13:35 2016 +0000
Revision:
6:71b44421e736
Parent:
4:6445a678d458 
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Who changed what in which revision?

UserRevisionLine numberNew contents of line
arve0 0:8174d9ceeca1 1 /**************************************************************************/
arve0 0:8174d9ceeca1 2 /*!
arve0 0:8174d9ceeca1 3 @file Adafruit_ADS1015.cpp
arve0 0:8174d9ceeca1 4 @author K.Townsend (Adafruit Industries)
arve0 0:8174d9ceeca1 5 @license BSD (see LICENSE.txt)
arve0 0:8174d9ceeca1 6
arve0 0:8174d9ceeca1 7 Ported to mbed by Arve Seljebu - arve0.github.io
arve0 0:8174d9ceeca1 8
arve0 0:8174d9ceeca1 9 Driver for the ADS1015/ADS1115 ADC
arve0 0:8174d9ceeca1 10
arve0 0:8174d9ceeca1 11 This is a library for the Adafruit MPL115A2 breakout
arve0 0:8174d9ceeca1 12 ----> https://www.adafruit.com/products/1083
arve0 0:8174d9ceeca1 13
arve0 0:8174d9ceeca1 14 Adafruit invests time and resources providing this open source code,
arve0 0:8174d9ceeca1 15 please support Adafruit and open-source hardware by purchasing
arve0 0:8174d9ceeca1 16 products from Adafruit!
arve0 0:8174d9ceeca1 17
arve0 0:8174d9ceeca1 18 @section HISTORY
arve0 0:8174d9ceeca1 19
arve0 0:8174d9ceeca1 20 v1.0 - First release
arve0 0:8174d9ceeca1 21 v1.1.1 - Ported to mbed
arve0 0:8174d9ceeca1 22 */
arve0 0:8174d9ceeca1 23 /**************************************************************************/
arve0 0:8174d9ceeca1 24
arve0 0:8174d9ceeca1 25 #include <mbed.h>
arve0 0:8174d9ceeca1 26 #include "Adafruit_ADS1015.h"
arve0 0:8174d9ceeca1 27
arve0 0:8174d9ceeca1 28 /**************************************************************************/
arve0 0:8174d9ceeca1 29 /*!
arve0 0:8174d9ceeca1 30 @brief Writes 16-bits to the specified destination register
arve0 0:8174d9ceeca1 31 */
arve0 0:8174d9ceeca1 32 /**************************************************************************/
arve0 3:fb735fb343de 33 void Adafruit_ADS1015::writeRegister(uint8_t i2cAddress, uint8_t reg, uint16_t value)
arve0 3:fb735fb343de 34 {
arve0 3:fb735fb343de 35 char cmd[3];
arve0 3:fb735fb343de 36 cmd[0] = (char)reg;
arve0 3:fb735fb343de 37 cmd[1] = (char)(value>>8);
arve0 3:fb735fb343de 38 cmd[2] = (char)(value & 0xFF);
arve0 3:fb735fb343de 39 m_i2c->write(i2cAddress, cmd, 3);
arve0 0:8174d9ceeca1 40 }
arve0 0:8174d9ceeca1 41
arve0 0:8174d9ceeca1 42 /**************************************************************************/
arve0 0:8174d9ceeca1 43 /*!
arve0 0:8174d9ceeca1 44 @brief Reads 16-bits from the specified register
arve0 0:8174d9ceeca1 45 */
arve0 0:8174d9ceeca1 46 /**************************************************************************/
arve0 3:fb735fb343de 47 uint16_t Adafruit_ADS1015::readRegister(uint8_t i2cAddress, uint8_t reg)
arve0 3:fb735fb343de 48 {
arve0 3:fb735fb343de 49 char data[2];
arve0 3:fb735fb343de 50 data[0] = reg; // temporary use this to send address to conversion register
arve0 3:fb735fb343de 51 m_i2c->write(i2cAddress, data, 1);
arve0 3:fb735fb343de 52 m_i2c->read(i2cAddress, data, 2);
arve0 3:fb735fb343de 53 return (data[0] << 8 | data [1]);
arve0 0:8174d9ceeca1 54 }
arve0 0:8174d9ceeca1 55
arve0 0:8174d9ceeca1 56 /**************************************************************************/
arve0 0:8174d9ceeca1 57 /*!
arve0 0:8174d9ceeca1 58 @brief Instantiates a new ADS1015 class w/appropriate properties
arve0 0:8174d9ceeca1 59 */
arve0 0:8174d9ceeca1 60 /**************************************************************************/
arve0 3:fb735fb343de 61 Adafruit_ADS1015::Adafruit_ADS1015(I2C* i2c, uint8_t i2cAddress)
arve0 0:8174d9ceeca1 62 {
arve0 3:fb735fb343de 63 // shift 7 bit address 1 left: read expects 8 bit address, see I2C.h
arve0 3:fb735fb343de 64 m_i2cAddress = i2cAddress << 1;
arve0 3:fb735fb343de 65 m_conversionDelay = ADS1015_CONVERSIONDELAY;
arve0 3:fb735fb343de 66 m_bitShift = 4;
arve0 3:fb735fb343de 67 m_gain = GAIN_TWOTHIRDS; /* +/- 6.144V range (limited to VDD +0.3V max!) */
arve0 3:fb735fb343de 68 m_i2c = i2c;
arve0 0:8174d9ceeca1 69 }
arve0 0:8174d9ceeca1 70
arve0 0:8174d9ceeca1 71 /**************************************************************************/
arve0 0:8174d9ceeca1 72 /*!
arve0 0:8174d9ceeca1 73 @brief Instantiates a new ADS1115 class w/appropriate properties
arve0 0:8174d9ceeca1 74 */
arve0 0:8174d9ceeca1 75 /**************************************************************************/
arve0 0:8174d9ceeca1 76 Adafruit_ADS1115::Adafruit_ADS1115(I2C* i2c, uint8_t i2cAddress)
arve0 0:8174d9ceeca1 77 {
arve0 3:fb735fb343de 78 // shift 7 bit address 1 left: read expects 8 bit address, see mbed's I2C.h
arve0 3:fb735fb343de 79 m_i2cAddress = i2cAddress << 1;
arve0 3:fb735fb343de 80 m_conversionDelay = ADS1115_CONVERSIONDELAY;
arve0 3:fb735fb343de 81 m_bitShift = 0;
arve0 3:fb735fb343de 82 m_gain = GAIN_TWOTHIRDS; /* +/- 6.144V range (limited to VDD +0.3V max!) */
arve0 3:fb735fb343de 83 m_i2c = i2c;
Gaku0606 6:71b44421e736 84 m_i2c->frequency(400000);//1000000
arve0 0:8174d9ceeca1 85 }
arve0 0:8174d9ceeca1 86
arve0 0:8174d9ceeca1 87 /**************************************************************************/
arve0 0:8174d9ceeca1 88 /*!
arve0 0:8174d9ceeca1 89 @brief Sets the gain and input voltage range
arve0 0:8174d9ceeca1 90 */
arve0 0:8174d9ceeca1 91 /**************************************************************************/
arve0 0:8174d9ceeca1 92 void Adafruit_ADS1015::setGain(adsGain_t gain)
arve0 0:8174d9ceeca1 93 {
arve0 3:fb735fb343de 94 m_gain = gain;
arve0 0:8174d9ceeca1 95 }
arve0 0:8174d9ceeca1 96
arve0 0:8174d9ceeca1 97 /**************************************************************************/
arve0 0:8174d9ceeca1 98 /*!
arve0 0:8174d9ceeca1 99 @brief Gets a gain and input voltage range
arve0 0:8174d9ceeca1 100 */
arve0 0:8174d9ceeca1 101 /**************************************************************************/
arve0 0:8174d9ceeca1 102 adsGain_t Adafruit_ADS1015::getGain()
arve0 0:8174d9ceeca1 103 {
arve0 3:fb735fb343de 104 return m_gain;
arve0 0:8174d9ceeca1 105 }
arve0 0:8174d9ceeca1 106
arve0 0:8174d9ceeca1 107 /**************************************************************************/
arve0 0:8174d9ceeca1 108 /*!
arve0 0:8174d9ceeca1 109 @brief Gets a single-ended ADC reading from the specified channel
arve0 0:8174d9ceeca1 110 */
arve0 0:8174d9ceeca1 111 /**************************************************************************/
arve0 3:fb735fb343de 112 uint16_t Adafruit_ADS1015::readADC_SingleEnded(uint8_t channel)
arve0 3:fb735fb343de 113 {
arve0 3:fb735fb343de 114 if (channel > 3) {
arve0 3:fb735fb343de 115 return 0;
arve0 3:fb735fb343de 116 }
arve0 0:8174d9ceeca1 117
arve0 3:fb735fb343de 118 // Start with default values
arve0 3:fb735fb343de 119 uint16_t config = ADS1015_REG_CONFIG_CQUE_NONE | // Disable the comparator (default val)
arve0 3:fb735fb343de 120 ADS1015_REG_CONFIG_CLAT_NONLAT | // Non-latching (default val)
arve0 3:fb735fb343de 121 ADS1015_REG_CONFIG_CPOL_ACTVLOW | // Alert/Rdy active low (default val)
arve0 3:fb735fb343de 122 ADS1015_REG_CONFIG_CMODE_TRAD | // Traditional comparator (default val)
arve0 4:6445a678d458 123 ADS1015_REG_CONFIG_DR_1600SPS | // 1600(ADS1015) or 250(ADS1115) samples per second (default)
arve0 3:fb735fb343de 124 ADS1015_REG_CONFIG_MODE_SINGLE; // Single-shot mode (default)
arve0 3:fb735fb343de 125
arve0 3:fb735fb343de 126 // Set PGA/voltage range
arve0 3:fb735fb343de 127 config |= m_gain;
arve0 0:8174d9ceeca1 128
arve0 3:fb735fb343de 129 // Set single-ended input channel
arve0 3:fb735fb343de 130 switch (channel) {
arve0 3:fb735fb343de 131 case (0):
arve0 3:fb735fb343de 132 config |= ADS1015_REG_CONFIG_MUX_SINGLE_0;
arve0 3:fb735fb343de 133 break;
arve0 3:fb735fb343de 134 case (1):
arve0 3:fb735fb343de 135 config |= ADS1015_REG_CONFIG_MUX_SINGLE_1;
arve0 3:fb735fb343de 136 break;
arve0 3:fb735fb343de 137 case (2):
arve0 3:fb735fb343de 138 config |= ADS1015_REG_CONFIG_MUX_SINGLE_2;
arve0 3:fb735fb343de 139 break;
arve0 3:fb735fb343de 140 case (3):
arve0 3:fb735fb343de 141 config |= ADS1015_REG_CONFIG_MUX_SINGLE_3;
arve0 3:fb735fb343de 142 break;
arve0 3:fb735fb343de 143 }
arve0 0:8174d9ceeca1 144
arve0 3:fb735fb343de 145 // Set 'start single-conversion' bit
arve0 3:fb735fb343de 146 config |= ADS1015_REG_CONFIG_OS_SINGLE;
arve0 0:8174d9ceeca1 147
arve0 3:fb735fb343de 148 // Write config register to the ADC
arve0 3:fb735fb343de 149 writeRegister(m_i2cAddress, ADS1015_REG_POINTER_CONFIG, config);
arve0 0:8174d9ceeca1 150
arve0 3:fb735fb343de 151 // Wait for the conversion to complete
arve0 3:fb735fb343de 152 wait_ms(m_conversionDelay);
arve0 0:8174d9ceeca1 153
arve0 3:fb735fb343de 154 // Read the conversion results
arve0 3:fb735fb343de 155 // Shift 12-bit results right 4 bits for the ADS1015
arve0 3:fb735fb343de 156 return readRegister(m_i2cAddress, ADS1015_REG_POINTER_CONVERT) >> m_bitShift;
arve0 0:8174d9ceeca1 157 }
arve0 0:8174d9ceeca1 158
arve0 0:8174d9ceeca1 159 /**************************************************************************/
arve0 3:fb735fb343de 160 /*!
arve0 0:8174d9ceeca1 161 @brief Reads the conversion results, measuring the voltage
arve0 0:8174d9ceeca1 162 difference between the P (AIN0) and N (AIN1) input. Generates
arve0 0:8174d9ceeca1 163 a signed value since the difference can be either
arve0 0:8174d9ceeca1 164 positive or negative.
arve0 0:8174d9ceeca1 165 */
arve0 0:8174d9ceeca1 166 /**************************************************************************/
arve0 3:fb735fb343de 167 int16_t Adafruit_ADS1015::readADC_Differential_0_1()
arve0 3:fb735fb343de 168 {
arve0 3:fb735fb343de 169 // Start with default values
arve0 3:fb735fb343de 170 uint16_t config = ADS1015_REG_CONFIG_CQUE_NONE | // Disable the comparator (default val)
Gaku0606 6:71b44421e736 171 //ADS1015_REG_CONFIG_CLAT_NONLAT | // Non-latching (default val)
Gaku0606 6:71b44421e736 172 ADS1015_REG_CONFIG_CLAT_LATCH |
arve0 3:fb735fb343de 173 ADS1015_REG_CONFIG_CPOL_ACTVLOW | // Alert/Rdy active low (default val)
arve0 3:fb735fb343de 174 ADS1015_REG_CONFIG_CMODE_TRAD | // Traditional comparator (default val)
Gaku0606 6:71b44421e736 175 //ADS1015_REG_CONFIG_DR_1600SPS | // 1600(ADS1015) or 250(ADS1115) samples per second (default)
Gaku0606 6:71b44421e736 176 ADS1015_REG_CONFIG_DR_3300SPS | //3300 or 860(ADS1115)
Gaku0606 6:71b44421e736 177 ADS1015_REG_CONFIG_MODE_CONTIN;
Gaku0606 6:71b44421e736 178 //ADS1015_REG_CONFIG_MODE_SINGLE; // Single-shot mode (default)
arve0 0:8174d9ceeca1 179
arve0 3:fb735fb343de 180 // Set PGA/voltage range
arve0 3:fb735fb343de 181 config |= m_gain;
arve0 0:8174d9ceeca1 182
arve0 3:fb735fb343de 183 // Set channels
arve0 3:fb735fb343de 184 config |= ADS1015_REG_CONFIG_MUX_DIFF_0_1; // AIN0 = P, AIN1 = N
arve0 0:8174d9ceeca1 185
arve0 3:fb735fb343de 186 // Set 'start single-conversion' bit
arve0 3:fb735fb343de 187 config |= ADS1015_REG_CONFIG_OS_SINGLE;
arve0 0:8174d9ceeca1 188
arve0 3:fb735fb343de 189 // Write config register to the ADC
arve0 3:fb735fb343de 190 writeRegister(m_i2cAddress, ADS1015_REG_POINTER_CONFIG, config);
arve0 3:fb735fb343de 191
arve0 3:fb735fb343de 192 // Wait for the conversion to complete
arve0 3:fb735fb343de 193 wait_ms(m_conversionDelay);
arve0 0:8174d9ceeca1 194
arve0 3:fb735fb343de 195 // Read the conversion results
arve0 3:fb735fb343de 196 uint16_t res = readRegister(m_i2cAddress, ADS1015_REG_POINTER_CONVERT) >> m_bitShift;
arve0 3:fb735fb343de 197 if (m_bitShift == 0) {
arve0 3:fb735fb343de 198 return (int16_t)res;
arve0 3:fb735fb343de 199 } else {
arve0 3:fb735fb343de 200 // Shift 12-bit results right 4 bits for the ADS1015,
arve0 3:fb735fb343de 201 // making sure we keep the sign bit intact
arve0 3:fb735fb343de 202 if (res > 0x07FF) {
arve0 3:fb735fb343de 203 // negative number - extend the sign to 16th bit
arve0 3:fb735fb343de 204 res |= 0xF000;
arve0 3:fb735fb343de 205 }
arve0 3:fb735fb343de 206 return (int16_t)res;
arve0 0:8174d9ceeca1 207 }
arve0 0:8174d9ceeca1 208 }
arve0 0:8174d9ceeca1 209
arve0 0:8174d9ceeca1 210 /**************************************************************************/
arve0 3:fb735fb343de 211 /*!
arve0 0:8174d9ceeca1 212 @brief Reads the conversion results, measuring the voltage
arve0 0:8174d9ceeca1 213 difference between the P (AIN2) and N (AIN3) input. Generates
arve0 0:8174d9ceeca1 214 a signed value since the difference can be either
arve0 0:8174d9ceeca1 215 positive or negative.
arve0 0:8174d9ceeca1 216 */
arve0 0:8174d9ceeca1 217 /**************************************************************************/
arve0 3:fb735fb343de 218 int16_t Adafruit_ADS1015::readADC_Differential_2_3()
arve0 3:fb735fb343de 219 {
arve0 3:fb735fb343de 220 // Start with default values
arve0 3:fb735fb343de 221 uint16_t config = ADS1015_REG_CONFIG_CQUE_NONE | // Disable the comparator (default val)
arve0 3:fb735fb343de 222 ADS1015_REG_CONFIG_CLAT_NONLAT | // Non-latching (default val)
arve0 3:fb735fb343de 223 ADS1015_REG_CONFIG_CPOL_ACTVLOW | // Alert/Rdy active low (default val)
arve0 3:fb735fb343de 224 ADS1015_REG_CONFIG_CMODE_TRAD | // Traditional comparator (default val)
arve0 4:6445a678d458 225 ADS1015_REG_CONFIG_DR_1600SPS | // 1600(ADS1015) or 250(ADS1115) samples per second (default)
arve0 3:fb735fb343de 226 ADS1015_REG_CONFIG_MODE_SINGLE; // Single-shot mode (default)
arve0 0:8174d9ceeca1 227
arve0 3:fb735fb343de 228 // Set PGA/voltage range
arve0 3:fb735fb343de 229 config |= m_gain;
arve0 0:8174d9ceeca1 230
arve0 3:fb735fb343de 231 // Set channels
arve0 3:fb735fb343de 232 config |= ADS1015_REG_CONFIG_MUX_DIFF_2_3; // AIN2 = P, AIN3 = N
arve0 0:8174d9ceeca1 233
arve0 3:fb735fb343de 234 // Set 'start single-conversion' bit
arve0 3:fb735fb343de 235 config |= ADS1015_REG_CONFIG_OS_SINGLE;
arve0 0:8174d9ceeca1 236
arve0 3:fb735fb343de 237 // Write config register to the ADC
arve0 3:fb735fb343de 238 writeRegister(m_i2cAddress, ADS1015_REG_POINTER_CONFIG, config);
arve0 3:fb735fb343de 239
arve0 3:fb735fb343de 240 // Wait for the conversion to complete
arve0 3:fb735fb343de 241 wait_ms(m_conversionDelay);
arve0 0:8174d9ceeca1 242
arve0 3:fb735fb343de 243 // Read the conversion results
arve0 3:fb735fb343de 244 uint16_t res = readRegister(m_i2cAddress, ADS1015_REG_POINTER_CONVERT) >> m_bitShift;
arve0 3:fb735fb343de 245 if (m_bitShift == 0) {
arve0 3:fb735fb343de 246 return (int16_t)res;
arve0 3:fb735fb343de 247 } else {
arve0 3:fb735fb343de 248 // Shift 12-bit results right 4 bits for the ADS1015,
arve0 3:fb735fb343de 249 // making sure we keep the sign bit intact
arve0 3:fb735fb343de 250 if (res > 0x07FF) {
arve0 3:fb735fb343de 251 // negative number - extend the sign to 16th bit
arve0 3:fb735fb343de 252 res |= 0xF000;
arve0 3:fb735fb343de 253 }
arve0 3:fb735fb343de 254 return (int16_t)res;
arve0 0:8174d9ceeca1 255 }
arve0 0:8174d9ceeca1 256 }
arve0 0:8174d9ceeca1 257
arve0 0:8174d9ceeca1 258 /**************************************************************************/
arve0 0:8174d9ceeca1 259 /*!
arve0 0:8174d9ceeca1 260 @brief Sets up the comparator to operate in basic mode, causing the
arve0 0:8174d9ceeca1 261 ALERT/RDY pin to assert (go from high to low) when the ADC
arve0 0:8174d9ceeca1 262 value exceeds the specified threshold.
arve0 0:8174d9ceeca1 263
arve0 0:8174d9ceeca1 264 This will also set the ADC in continuous conversion mode.
arve0 0:8174d9ceeca1 265 */
arve0 0:8174d9ceeca1 266 /**************************************************************************/
arve0 0:8174d9ceeca1 267 void Adafruit_ADS1015::startComparator_SingleEnded(uint8_t channel, int16_t threshold)
arve0 0:8174d9ceeca1 268 {
arve0 3:fb735fb343de 269 // Start with default values
arve0 3:fb735fb343de 270 uint16_t config = ADS1015_REG_CONFIG_CQUE_1CONV | // Comparator enabled and asserts on 1 match
arve0 3:fb735fb343de 271 ADS1015_REG_CONFIG_CLAT_LATCH | // Latching mode
arve0 3:fb735fb343de 272 ADS1015_REG_CONFIG_CPOL_ACTVLOW | // Alert/Rdy active low (default val)
arve0 3:fb735fb343de 273 ADS1015_REG_CONFIG_CMODE_TRAD | // Traditional comparator (default val)
Gaku0606 6:71b44421e736 274 ADS1015_REG_CONFIG_DR_3300SPS | // 1600(ADS1015) or 250(ADS1115) samples per second (default)
arve0 3:fb735fb343de 275 ADS1015_REG_CONFIG_MODE_CONTIN | // Continuous conversion mode
arve0 3:fb735fb343de 276 ADS1015_REG_CONFIG_MODE_CONTIN; // Continuous conversion mode
arve0 3:fb735fb343de 277
arve0 3:fb735fb343de 278 // Set PGA/voltage range
arve0 3:fb735fb343de 279 config |= m_gain;
arve0 0:8174d9ceeca1 280
arve0 3:fb735fb343de 281 // Set single-ended input channel
arve0 3:fb735fb343de 282 switch (channel) {
arve0 3:fb735fb343de 283 case (0):
arve0 3:fb735fb343de 284 config |= ADS1015_REG_CONFIG_MUX_SINGLE_0;
arve0 3:fb735fb343de 285 break;
arve0 3:fb735fb343de 286 case (1):
arve0 3:fb735fb343de 287 config |= ADS1015_REG_CONFIG_MUX_SINGLE_1;
arve0 3:fb735fb343de 288 break;
arve0 3:fb735fb343de 289 case (2):
arve0 3:fb735fb343de 290 config |= ADS1015_REG_CONFIG_MUX_SINGLE_2;
arve0 3:fb735fb343de 291 break;
arve0 3:fb735fb343de 292 case (3):
arve0 3:fb735fb343de 293 config |= ADS1015_REG_CONFIG_MUX_SINGLE_3;
arve0 3:fb735fb343de 294 break;
arve0 3:fb735fb343de 295 }
arve0 0:8174d9ceeca1 296
arve0 3:fb735fb343de 297 // Set the high threshold register
arve0 3:fb735fb343de 298 // Shift 12-bit results left 4 bits for the ADS1015
arve0 3:fb735fb343de 299 writeRegister(m_i2cAddress, ADS1015_REG_POINTER_HITHRESH, threshold << m_bitShift);
arve0 0:8174d9ceeca1 300
arve0 3:fb735fb343de 301 // Write config register to the ADC
arve0 3:fb735fb343de 302 writeRegister(m_i2cAddress, ADS1015_REG_POINTER_CONFIG, config);
arve0 0:8174d9ceeca1 303 }
arve0 0:8174d9ceeca1 304
arve0 0:8174d9ceeca1 305 /**************************************************************************/
arve0 0:8174d9ceeca1 306 /*!
arve0 0:8174d9ceeca1 307 @brief In order to clear the comparator, we need to read the
arve0 0:8174d9ceeca1 308 conversion results. This function reads the last conversion
arve0 0:8174d9ceeca1 309 results without changing the config value.
arve0 0:8174d9ceeca1 310 */
arve0 0:8174d9ceeca1 311 /**************************************************************************/
arve0 0:8174d9ceeca1 312 int16_t Adafruit_ADS1015::getLastConversionResults()
arve0 0:8174d9ceeca1 313 {
arve0 3:fb735fb343de 314 // Wait for the conversion to complete
arve0 3:fb735fb343de 315 wait_ms(m_conversionDelay);
arve0 0:8174d9ceeca1 316
arve0 3:fb735fb343de 317 // Read the conversion results
arve0 3:fb735fb343de 318 uint16_t res = readRegister(m_i2cAddress, ADS1015_REG_POINTER_CONVERT) >> m_bitShift;
arve0 3:fb735fb343de 319 if (m_bitShift == 0) {
arve0 3:fb735fb343de 320 return (int16_t)res;
arve0 3:fb735fb343de 321 } else {
arve0 3:fb735fb343de 322 // Shift 12-bit results right 4 bits for the ADS1015,
arve0 3:fb735fb343de 323 // making sure we keep the sign bit intact
arve0 3:fb735fb343de 324 if (res > 0x07FF) {
arve0 3:fb735fb343de 325 // negative number - extend the sign to 16th bit
arve0 3:fb735fb343de 326 res |= 0xF000;
arve0 3:fb735fb343de 327 }
arve0 3:fb735fb343de 328 return (int16_t)res;
arve0 0:8174d9ceeca1 329 }
Gaku0606 6:71b44421e736 330 }
Gaku0606 6:71b44421e736 331
Gaku0606 6:71b44421e736 332 void Adafruit_ADS1015::user(){
Gaku0606 6:71b44421e736 333
Gaku0606 6:71b44421e736 334 writeRegister(m_i2cAddress, ADS1015_REG_POINTER_CONFIG , 0b0000001011101111);//
Gaku0606 6:71b44421e736 335
arve0 3:fb735fb343de 336 }