Akash Gaikwad / Mbed 2 deprecated ATT_Cellular_IOT_Using_ATT_Flow_and_M2X_Cloud

Remote I/O Sensor bus with AT&T flow and M2X cloud

Dependencies:   DHT11 FXOS8700CQ MODSERIAL mbed

Fork of Avnet_ATT_Cellular_IOT by Avnet

hts221_driver.cpp@82:4e608375910a, 2018-04-17 (annotated)

Committer:
agaikwad
Date:
Tue Apr 17 21:29:20 2018 +0000
Revision:
82:4e608375910a
Parent:
68:6e311c747045 
Remote I/O Sensor bus with AT&T flow and M2X cloud

Who changed what in which revision?

UserRevisionLine numberNew contents of line
fkellermavnet 68:6e311c747045 1 /* ===================================================================
fkellermavnet 68:6e311c747045 2 Copyright © 2016, AVNET Inc.
fkellermavnet 68:6e311c747045 3
fkellermavnet 68:6e311c747045 4 Licensed under the Apache License, Version 2.0 (the "License");
fkellermavnet 68:6e311c747045 5 you may not use this file except in compliance with the License.
fkellermavnet 68:6e311c747045 6 You may obtain a copy of the License at
fkellermavnet 68:6e311c747045 7
fkellermavnet 68:6e311c747045 8 http://www.apache.org/licenses/LICENSE-2.0
fkellermavnet 68:6e311c747045 9
fkellermavnet 68:6e311c747045 10 Unless required by applicable law or agreed to in writing,
fkellermavnet 68:6e311c747045 11 software distributed under the License is distributed on an
fkellermavnet 68:6e311c747045 12 "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
fkellermavnet 68:6e311c747045 13 either express or implied. See the License for the specific
fkellermavnet 68:6e311c747045 14 language governing permissions and limitations under the License.
fkellermavnet 68:6e311c747045 15
fkellermavnet 68:6e311c747045 16 ======================================================================== */
JMF 0:9d5134074d84 17
JMF 0:9d5134074d84 18 #include "HTS221.h"
JMF 0:9d5134074d84 19
JMF 0:9d5134074d84 20
JMF 0:9d5134074d84 21 // ------------------------------------------------------------------------------
JMF 0:9d5134074d84 22 //jmf -- define I2C pins and functions to read & write to I2C device
JMF 0:9d5134074d84 23
JMF 0:9d5134074d84 24 #include <string>
JMF 0:9d5134074d84 25 #include "mbed.h"
JMF 0:9d5134074d84 26
stefanrousseau 11:e6602513730f 27 #include "hardware.h"
JMF 28:886833917643 28 //I2C i2c(PTC11, PTC10); //SDA, SCL -- define the I2C pins being used. Defined in a
JMF 28:886833917643 29 //common locatioin since sensors also use I2C
JMF 0:9d5134074d84 30
JMF 0:9d5134074d84 31 // Read a single unsigned char from addressToRead and return it as a unsigned char
JMF 0:9d5134074d84 32 unsigned char HTS221::readRegister(unsigned char slaveAddress, unsigned char ToRead)
JMF 0:9d5134074d84 33 {
JMF 0:9d5134074d84 34 char data = ToRead;
JMF 0:9d5134074d84 35
stefanrousseau 11:e6602513730f 36 //i2c.write(slaveAddress, &data, 1, 0);
stefanrousseau 11:e6602513730f 37 i2c.write(slaveAddress, &data, 1, 1); //by Stefan
JMF 0:9d5134074d84 38 i2c.read(slaveAddress, &data, 1, 0);
JMF 0:9d5134074d84 39 return data;
JMF 0:9d5134074d84 40 }
JMF 0:9d5134074d84 41
JMF 0:9d5134074d84 42 // Writes a single unsigned char (dataToWrite) into regToWrite
JMF 0:9d5134074d84 43 int HTS221::writeRegister(unsigned char slaveAddress, unsigned char regToWrite, unsigned char dataToWrite)
JMF 0:9d5134074d84 44 {
JMF 0:9d5134074d84 45 const char data[] = {regToWrite, dataToWrite};
JMF 0:9d5134074d84 46
JMF 0:9d5134074d84 47 return i2c.write(slaveAddress,data,2,0);
JMF 0:9d5134074d84 48 }
JMF 0:9d5134074d84 49
JMF 0:9d5134074d84 50
JMF 0:9d5134074d84 51 //jmf end
JMF 0:9d5134074d84 52 // ------------------------------------------------------------------------------
JMF 0:9d5134074d84 53
JMF 1:af7a42f7d465 54 //static inline int humidityReady(uint8_t data) {
JMF 1:af7a42f7d465 55 // return (data & 0x02);
JMF 1:af7a42f7d465 56 //}
JMF 1:af7a42f7d465 57 //static inline int temperatureReady(uint8_t data) {
JMF 1:af7a42f7d465 58 // return (data & 0x01);
JMF 1:af7a42f7d465 59 //}
JMF 0:9d5134074d84 60
JMF 0:9d5134074d84 61
JMF 0:9d5134074d84 62 HTS221::HTS221(void) : _address(HTS221_ADDRESS)
JMF 0:9d5134074d84 63 {
JMF 0:9d5134074d84 64 _temperature = 0;
JMF 0:9d5134074d84 65 _humidity = 0;
JMF 0:9d5134074d84 66 }
JMF 0:9d5134074d84 67
JMF 0:9d5134074d84 68
JMF 0:9d5134074d84 69 int HTS221::begin(void)
JMF 0:9d5134074d84 70 {
JMF 0:9d5134074d84 71 uint8_t data;
JMF 0:9d5134074d84 72
JMF 0:9d5134074d84 73 data = readRegister(_address, WHO_AM_I);
JMF 0:9d5134074d84 74 if (data == WHO_AM_I_RETURN){
JMF 0:9d5134074d84 75 if (activate()){
JMF 0:9d5134074d84 76 storeCalibration();
JMF 0:9d5134074d84 77 return data;
JMF 0:9d5134074d84 78 }
JMF 0:9d5134074d84 79 }
JMF 0:9d5134074d84 80
JMF 0:9d5134074d84 81 return 0;
JMF 0:9d5134074d84 82 }
JMF 0:9d5134074d84 83
JMF 0:9d5134074d84 84 int
JMF 0:9d5134074d84 85 HTS221::storeCalibration(void)
JMF 0:9d5134074d84 86 {
JMF 0:9d5134074d84 87 uint8_t data;
JMF 0:9d5134074d84 88 uint16_t tmp;
JMF 0:9d5134074d84 89
JMF 0:9d5134074d84 90 for (int reg=CALIB_START; reg<=CALIB_END; reg++) {
JMF 0:9d5134074d84 91 if ((reg!=CALIB_START+8) && (reg!=CALIB_START+9) && (reg!=CALIB_START+4)) {
JMF 0:9d5134074d84 92
JMF 0:9d5134074d84 93 data = readRegister(HTS221_ADDRESS, reg);
JMF 0:9d5134074d84 94
JMF 0:9d5134074d84 95 switch (reg) {
JMF 0:9d5134074d84 96 case CALIB_START:
JMF 0:9d5134074d84 97 _h0_rH = data;
JMF 0:9d5134074d84 98 break;
JMF 0:9d5134074d84 99 case CALIB_START+1:
JMF 0:9d5134074d84 100 _h1_rH = data;
JMF 0:9d5134074d84 101 break;
JMF 0:9d5134074d84 102 case CALIB_START+2:
JMF 0:9d5134074d84 103 _T0_degC = data;
JMF 0:9d5134074d84 104 break;
JMF 0:9d5134074d84 105 case CALIB_START+3:
JMF 0:9d5134074d84 106 _T1_degC = data;
JMF 0:9d5134074d84 107 break;
JMF 0:9d5134074d84 108
JMF 0:9d5134074d84 109 case CALIB_START+5:
JMF 0:9d5134074d84 110 tmp = _T0_degC;
JMF 0:9d5134074d84 111 _T0_degC = (data&0x3)<<8;
JMF 0:9d5134074d84 112 _T0_degC |= tmp;
JMF 0:9d5134074d84 113
JMF 0:9d5134074d84 114 tmp = _T1_degC;
JMF 0:9d5134074d84 115 _T1_degC = ((data&0xC)>>2)<<8;
JMF 0:9d5134074d84 116 _T1_degC |= tmp;
JMF 0:9d5134074d84 117 break;
JMF 0:9d5134074d84 118 case CALIB_START+6:
JMF 0:9d5134074d84 119 _H0_T0 = data;
JMF 0:9d5134074d84 120 break;
JMF 0:9d5134074d84 121 case CALIB_START+7:
JMF 0:9d5134074d84 122 _H0_T0 |= data<<8;
JMF 0:9d5134074d84 123 break;
JMF 0:9d5134074d84 124 case CALIB_START+0xA:
JMF 0:9d5134074d84 125 _H1_T0 = data;
JMF 0:9d5134074d84 126 break;
JMF 0:9d5134074d84 127 case CALIB_START+0xB:
JMF 0:9d5134074d84 128 _H1_T0 |= data <<8;
JMF 0:9d5134074d84 129 break;
JMF 0:9d5134074d84 130 case CALIB_START+0xC:
JMF 0:9d5134074d84 131 _T0_OUT = data;
JMF 0:9d5134074d84 132 break;
JMF 0:9d5134074d84 133 case CALIB_START+0xD:
JMF 0:9d5134074d84 134 _T0_OUT |= data << 8;
JMF 0:9d5134074d84 135 break;
JMF 0:9d5134074d84 136 case CALIB_START+0xE:
JMF 0:9d5134074d84 137 _T1_OUT = data;
JMF 0:9d5134074d84 138 break;
JMF 0:9d5134074d84 139 case CALIB_START+0xF:
JMF 0:9d5134074d84 140 _T1_OUT |= data << 8;
JMF 0:9d5134074d84 141 break;
JMF 0:9d5134074d84 142
JMF 0:9d5134074d84 143
JMF 0:9d5134074d84 144 case CALIB_START+8:
JMF 0:9d5134074d84 145 case CALIB_START+9:
JMF 0:9d5134074d84 146 case CALIB_START+4:
JMF 0:9d5134074d84 147 //DO NOTHING
JMF 0:9d5134074d84 148 break;
JMF 0:9d5134074d84 149
JMF 0:9d5134074d84 150 // to cover any possible error
JMF 0:9d5134074d84 151 default:
JMF 0:9d5134074d84 152 return false;
JMF 0:9d5134074d84 153 } /* switch */
JMF 0:9d5134074d84 154 } /* if */
JMF 0:9d5134074d84 155 } /* for */
JMF 0:9d5134074d84 156 return true;
JMF 0:9d5134074d84 157 }
JMF 0:9d5134074d84 158
JMF 0:9d5134074d84 159
JMF 0:9d5134074d84 160 int
JMF 0:9d5134074d84 161 HTS221::activate(void)
JMF 0:9d5134074d84 162 {
JMF 0:9d5134074d84 163 uint8_t data;
JMF 0:9d5134074d84 164
JMF 0:9d5134074d84 165 data = readRegister(_address, CTRL_REG1);
JMF 0:9d5134074d84 166 data |= POWER_UP;
JMF 0:9d5134074d84 167 data |= ODR0_SET;
JMF 0:9d5134074d84 168 writeRegister(_address, CTRL_REG1, data);
JMF 0:9d5134074d84 169
JMF 0:9d5134074d84 170 return true;
JMF 0:9d5134074d84 171 }
JMF 0:9d5134074d84 172
JMF 0:9d5134074d84 173
JMF 0:9d5134074d84 174 int HTS221::deactivate(void)
JMF 0:9d5134074d84 175 {
JMF 0:9d5134074d84 176 uint8_t data;
JMF 0:9d5134074d84 177
JMF 0:9d5134074d84 178 data = readRegister(_address, CTRL_REG1);
JMF 0:9d5134074d84 179 data &= ~POWER_UP;
JMF 0:9d5134074d84 180 writeRegister(_address, CTRL_REG1, data);
JMF 0:9d5134074d84 181 return true;
JMF 0:9d5134074d84 182 }
JMF 0:9d5134074d84 183
JMF 0:9d5134074d84 184
JMF 0:9d5134074d84 185 int
JMF 0:9d5134074d84 186 HTS221::bduActivate(void)
JMF 0:9d5134074d84 187 {
JMF 0:9d5134074d84 188 uint8_t data;
JMF 0:9d5134074d84 189
JMF 0:9d5134074d84 190 data = readRegister(_address, CTRL_REG1);
JMF 0:9d5134074d84 191 data |= BDU_SET;
JMF 0:9d5134074d84 192 writeRegister(_address, CTRL_REG1, data);
JMF 0:9d5134074d84 193
JMF 0:9d5134074d84 194 return true;
JMF 0:9d5134074d84 195 }
JMF 0:9d5134074d84 196
JMF 0:9d5134074d84 197
JMF 0:9d5134074d84 198 int
JMF 0:9d5134074d84 199 HTS221::bduDeactivate(void)
JMF 0:9d5134074d84 200 {
JMF 0:9d5134074d84 201 uint8_t data;
JMF 0:9d5134074d84 202
JMF 0:9d5134074d84 203 data = readRegister(_address, CTRL_REG1);
JMF 0:9d5134074d84 204 data &= ~BDU_SET;
JMF 0:9d5134074d84 205 writeRegister(_address, CTRL_REG1, data);
JMF 0:9d5134074d84 206 return true;
JMF 0:9d5134074d84 207 }
JMF 0:9d5134074d84 208
JMF 0:9d5134074d84 209
JMF 0:9d5134074d84 210 int
JMF 0:9d5134074d84 211 HTS221::readHumidity(void)
JMF 0:9d5134074d84 212 {
JMF 0:9d5134074d84 213 uint8_t data = 0;
JMF 0:9d5134074d84 214 uint16_t h_out = 0;
JMF 0:9d5134074d84 215 double h_temp = 0.0;
JMF 0:9d5134074d84 216 double hum = 0.0;
JMF 0:9d5134074d84 217
JMF 0:9d5134074d84 218 data = readRegister(_address, STATUS_REG);
JMF 0:9d5134074d84 219
JMF 0:9d5134074d84 220 if (data & HUMIDITY_READY) {
JMF 0:9d5134074d84 221 data = readRegister(_address, HUMIDITY_H_REG);
JMF 0:9d5134074d84 222 h_out = data << 8; // MSB
JMF 0:9d5134074d84 223 data = readRegister(_address, HUMIDITY_L_REG);
JMF 0:9d5134074d84 224 h_out |= data; // LSB
JMF 0:9d5134074d84 225
JMF 0:9d5134074d84 226 // Decode Humidity
JMF 0:9d5134074d84 227 hum = ((int16_t)(_h1_rH) - (int16_t)(_h0_rH))/2.0; // remove x2 multiple
JMF 0:9d5134074d84 228
JMF 0:9d5134074d84 229 // Calculate humidity in decimal of grade centigrades i.e. 15.0 = 150.
JMF 0:9d5134074d84 230 h_temp = (((int16_t)h_out - (int16_t)_H0_T0) * hum) / ((int16_t)_H1_T0 - (int16_t)_H0_T0);
JMF 0:9d5134074d84 231 hum = ((int16_t)_h0_rH) / 2.0; // remove x2 multiple
JMF 0:9d5134074d84 232 _humidity = (int16_t)((hum + h_temp)); // provide signed % measurement unit
JMF 0:9d5134074d84 233 }
JMF 0:9d5134074d84 234 return _humidity;
JMF 0:9d5134074d84 235 }
JMF 0:9d5134074d84 236
JMF 0:9d5134074d84 237
JMF 0:9d5134074d84 238
JMF 0:9d5134074d84 239 double
JMF 0:9d5134074d84 240 HTS221::readTemperature(void)
JMF 0:9d5134074d84 241 {
JMF 0:9d5134074d84 242 uint8_t data = 0;
JMF 0:9d5134074d84 243 uint16_t t_out = 0;
JMF 0:9d5134074d84 244 double t_temp = 0.0;
JMF 0:9d5134074d84 245 double deg = 0.0;
JMF 0:9d5134074d84 246
JMF 0:9d5134074d84 247 data = readRegister(_address, STATUS_REG);
JMF 0:9d5134074d84 248
JMF 0:9d5134074d84 249 if (data & TEMPERATURE_READY) {
JMF 0:9d5134074d84 250
JMF 0:9d5134074d84 251 data= readRegister(_address, TEMP_H_REG);
JMF 0:9d5134074d84 252 t_out = data << 8; // MSB
JMF 0:9d5134074d84 253 data = readRegister(_address, TEMP_L_REG);
JMF 0:9d5134074d84 254 t_out |= data; // LSB
JMF 0:9d5134074d84 255
JMF 0:9d5134074d84 256 // Decode Temperature
JMF 0:9d5134074d84 257 deg = ((int16_t)(_T1_degC) - (int16_t)(_T0_degC))/8.0; // remove x8 multiple
JMF 0:9d5134074d84 258
JMF 0:9d5134074d84 259 // Calculate Temperature in decimal of grade centigrades i.e. 15.0 = 150.
JMF 0:9d5134074d84 260 t_temp = (((int16_t)t_out - (int16_t)_T0_OUT) * deg) / ((int16_t)_T1_OUT - (int16_t)_T0_OUT);
JMF 0:9d5134074d84 261 deg = ((int16_t)_T0_degC) / 8.0; // remove x8 multiple
JMF 0:9d5134074d84 262 _temperature = deg + t_temp; // provide signed celsius measurement unit
JMF 0:9d5134074d84 263 }
JMF 0:9d5134074d84 264
JMF 0:9d5134074d84 265 return _temperature;
JMF 0:9d5134074d84 266 }