Suraj Pal / Mbed 2 deprecated FDS_Wireless_Solution

ATT example code

Dependencies:   WNCInterface mbed-rtos mbed

HTS221.cpp@0:2bfa06d10e28, 2017-05-22 (annotated)

Committer:
surajdagar
Date:
Mon May 22 19:50:26 2017 +0000
Revision:
0:2bfa06d10e28
Wireless solution ATT kit

Who changed what in which revision?

UserRevisionLine numberNew contents of line
surajdagar 0:2bfa06d10e28 1 /* ===================================================================
surajdagar 0:2bfa06d10e28 2 Copyright © 2016, AVNET Inc.
surajdagar 0:2bfa06d10e28 3
surajdagar 0:2bfa06d10e28 4 Licensed under the Apache License, Version 2.0 (the "License");
surajdagar 0:2bfa06d10e28 5 you may not use this file except in compliance with the License.
surajdagar 0:2bfa06d10e28 6 You may obtain a copy of the License at
surajdagar 0:2bfa06d10e28 7
surajdagar 0:2bfa06d10e28 8 http://www.apache.org/licenses/LICENSE-2.0
surajdagar 0:2bfa06d10e28 9
surajdagar 0:2bfa06d10e28 10 Unless required by applicable law or agreed to in writing,
surajdagar 0:2bfa06d10e28 11 software distributed under the License is distributed on an
surajdagar 0:2bfa06d10e28 12 "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
surajdagar 0:2bfa06d10e28 13 either express or implied. See the License for the specific
surajdagar 0:2bfa06d10e28 14 language governing permissions and limitations under the License.
surajdagar 0:2bfa06d10e28 15
surajdagar 0:2bfa06d10e28 16 ======================================================================== */
surajdagar 0:2bfa06d10e28 17
surajdagar 0:2bfa06d10e28 18 #include "HTS221.h"
surajdagar 0:2bfa06d10e28 19
surajdagar 0:2bfa06d10e28 20
surajdagar 0:2bfa06d10e28 21 // ------------------------------------------------------------------------------
surajdagar 0:2bfa06d10e28 22 //jmf -- define I2C pins and functions to read & write to I2C device
surajdagar 0:2bfa06d10e28 23
surajdagar 0:2bfa06d10e28 24 #include <string>
surajdagar 0:2bfa06d10e28 25 #include "mbed.h"
surajdagar 0:2bfa06d10e28 26 #include "hardware.h"
surajdagar 0:2bfa06d10e28 27
surajdagar 0:2bfa06d10e28 28 // Read a single unsigned char from addressToRead and return it as a unsigned char
surajdagar 0:2bfa06d10e28 29 unsigned char HTS221::readRegister(unsigned char slaveAddress, unsigned char ToRead)
surajdagar 0:2bfa06d10e28 30 {
surajdagar 0:2bfa06d10e28 31 char data = ToRead;
surajdagar 0:2bfa06d10e28 32
surajdagar 0:2bfa06d10e28 33 //i2c.write(slaveAddress, &data, 1, 0);
surajdagar 0:2bfa06d10e28 34 i2c.write(slaveAddress, &data, 1, 1); //by Stefan
surajdagar 0:2bfa06d10e28 35 i2c.read(slaveAddress, &data, 1, 0);
surajdagar 0:2bfa06d10e28 36 return data;
surajdagar 0:2bfa06d10e28 37 }
surajdagar 0:2bfa06d10e28 38
surajdagar 0:2bfa06d10e28 39 // Writes a single unsigned char (dataToWrite) into regToWrite
surajdagar 0:2bfa06d10e28 40 int HTS221::writeRegister(unsigned char slaveAddress, unsigned char regToWrite, unsigned char dataToWrite)
surajdagar 0:2bfa06d10e28 41 {
surajdagar 0:2bfa06d10e28 42 const char data[] = {regToWrite, dataToWrite};
surajdagar 0:2bfa06d10e28 43
surajdagar 0:2bfa06d10e28 44 return i2c.write(slaveAddress,data,2,0);
surajdagar 0:2bfa06d10e28 45 }
surajdagar 0:2bfa06d10e28 46
surajdagar 0:2bfa06d10e28 47
surajdagar 0:2bfa06d10e28 48 //jmf end
surajdagar 0:2bfa06d10e28 49 // ------------------------------------------------------------------------------
surajdagar 0:2bfa06d10e28 50
surajdagar 0:2bfa06d10e28 51 HTS221::HTS221(void) : _address(HTS221_ADDRESS) {
surajdagar 0:2bfa06d10e28 52 _temperature = 0;
surajdagar 0:2bfa06d10e28 53 _humidity = 0;
surajdagar 0:2bfa06d10e28 54 }
surajdagar 0:2bfa06d10e28 55
surajdagar 0:2bfa06d10e28 56
surajdagar 0:2bfa06d10e28 57 int HTS221::init(void) {
surajdagar 0:2bfa06d10e28 58 uint8_t data;
surajdagar 0:2bfa06d10e28 59
surajdagar 0:2bfa06d10e28 60 data = readRegister(_address, WHO_AM_I);
surajdagar 0:2bfa06d10e28 61 if (data == WHO_AM_I_RETURN){
surajdagar 0:2bfa06d10e28 62 if (activate()){
surajdagar 0:2bfa06d10e28 63 storeCalibration();
surajdagar 0:2bfa06d10e28 64 return data;
surajdagar 0:2bfa06d10e28 65 }
surajdagar 0:2bfa06d10e28 66 }
surajdagar 0:2bfa06d10e28 67
surajdagar 0:2bfa06d10e28 68 return 0;
surajdagar 0:2bfa06d10e28 69 }
surajdagar 0:2bfa06d10e28 70
surajdagar 0:2bfa06d10e28 71 int HTS221::storeCalibration(void) {
surajdagar 0:2bfa06d10e28 72 uint8_t data;
surajdagar 0:2bfa06d10e28 73 uint16_t tmp;
surajdagar 0:2bfa06d10e28 74
surajdagar 0:2bfa06d10e28 75 for (int reg=CALIB_START; reg<=CALIB_END; reg++) {
surajdagar 0:2bfa06d10e28 76 if ((reg!=CALIB_START+8) && (reg!=CALIB_START+9) && (reg!=CALIB_START+4)) {
surajdagar 0:2bfa06d10e28 77
surajdagar 0:2bfa06d10e28 78 data = readRegister(HTS221_ADDRESS, reg);
surajdagar 0:2bfa06d10e28 79
surajdagar 0:2bfa06d10e28 80 switch (reg) {
surajdagar 0:2bfa06d10e28 81 case CALIB_START:
surajdagar 0:2bfa06d10e28 82 _h0_rH = data;
surajdagar 0:2bfa06d10e28 83 break;
surajdagar 0:2bfa06d10e28 84 case CALIB_START+1:
surajdagar 0:2bfa06d10e28 85 _h1_rH = data;
surajdagar 0:2bfa06d10e28 86 break;
surajdagar 0:2bfa06d10e28 87 case CALIB_START+2:
surajdagar 0:2bfa06d10e28 88 _T0_degC = data;
surajdagar 0:2bfa06d10e28 89 break;
surajdagar 0:2bfa06d10e28 90 case CALIB_START+3:
surajdagar 0:2bfa06d10e28 91 _T1_degC = data;
surajdagar 0:2bfa06d10e28 92 break;
surajdagar 0:2bfa06d10e28 93
surajdagar 0:2bfa06d10e28 94 case CALIB_START+5:
surajdagar 0:2bfa06d10e28 95 tmp = _T0_degC;
surajdagar 0:2bfa06d10e28 96 _T0_degC = (data&0x3)<<8;
surajdagar 0:2bfa06d10e28 97 _T0_degC |= tmp;
surajdagar 0:2bfa06d10e28 98
surajdagar 0:2bfa06d10e28 99 tmp = _T1_degC;
surajdagar 0:2bfa06d10e28 100 _T1_degC = ((data&0xC)>>2)<<8;
surajdagar 0:2bfa06d10e28 101 _T1_degC |= tmp;
surajdagar 0:2bfa06d10e28 102 break;
surajdagar 0:2bfa06d10e28 103 case CALIB_START+6:
surajdagar 0:2bfa06d10e28 104 _H0_T0 = data;
surajdagar 0:2bfa06d10e28 105 break;
surajdagar 0:2bfa06d10e28 106 case CALIB_START+7:
surajdagar 0:2bfa06d10e28 107 _H0_T0 |= data<<8;
surajdagar 0:2bfa06d10e28 108 break;
surajdagar 0:2bfa06d10e28 109 case CALIB_START+0xA:
surajdagar 0:2bfa06d10e28 110 _H1_T0 = data;
surajdagar 0:2bfa06d10e28 111 break;
surajdagar 0:2bfa06d10e28 112 case CALIB_START+0xB:
surajdagar 0:2bfa06d10e28 113 _H1_T0 |= data <<8;
surajdagar 0:2bfa06d10e28 114 break;
surajdagar 0:2bfa06d10e28 115 case CALIB_START+0xC:
surajdagar 0:2bfa06d10e28 116 _T0_OUT = data;
surajdagar 0:2bfa06d10e28 117 break;
surajdagar 0:2bfa06d10e28 118 case CALIB_START+0xD:
surajdagar 0:2bfa06d10e28 119 _T0_OUT |= data << 8;
surajdagar 0:2bfa06d10e28 120 break;
surajdagar 0:2bfa06d10e28 121 case CALIB_START+0xE:
surajdagar 0:2bfa06d10e28 122 _T1_OUT = data;
surajdagar 0:2bfa06d10e28 123 break;
surajdagar 0:2bfa06d10e28 124 case CALIB_START+0xF:
surajdagar 0:2bfa06d10e28 125 _T1_OUT |= data << 8;
surajdagar 0:2bfa06d10e28 126 break;
surajdagar 0:2bfa06d10e28 127
surajdagar 0:2bfa06d10e28 128
surajdagar 0:2bfa06d10e28 129 case CALIB_START+8:
surajdagar 0:2bfa06d10e28 130 case CALIB_START+9:
surajdagar 0:2bfa06d10e28 131 case CALIB_START+4:
surajdagar 0:2bfa06d10e28 132 //DO NOTHING
surajdagar 0:2bfa06d10e28 133 break;
surajdagar 0:2bfa06d10e28 134
surajdagar 0:2bfa06d10e28 135 // to cover any possible error
surajdagar 0:2bfa06d10e28 136 default:
surajdagar 0:2bfa06d10e28 137 return false;
surajdagar 0:2bfa06d10e28 138 } /* switch */
surajdagar 0:2bfa06d10e28 139 } /* if */
surajdagar 0:2bfa06d10e28 140 } /* for */
surajdagar 0:2bfa06d10e28 141 return true;
surajdagar 0:2bfa06d10e28 142 }
surajdagar 0:2bfa06d10e28 143
surajdagar 0:2bfa06d10e28 144
surajdagar 0:2bfa06d10e28 145 int HTS221::activate(void) {
surajdagar 0:2bfa06d10e28 146 uint8_t data;
surajdagar 0:2bfa06d10e28 147
surajdagar 0:2bfa06d10e28 148 data = readRegister(_address, CTRL_REG1);
surajdagar 0:2bfa06d10e28 149 data |= POWER_UP;
surajdagar 0:2bfa06d10e28 150 data |= ODR0_SET;
surajdagar 0:2bfa06d10e28 151 writeRegister(_address, CTRL_REG1, data);
surajdagar 0:2bfa06d10e28 152
surajdagar 0:2bfa06d10e28 153 return true;
surajdagar 0:2bfa06d10e28 154 }
surajdagar 0:2bfa06d10e28 155
surajdagar 0:2bfa06d10e28 156
surajdagar 0:2bfa06d10e28 157 int HTS221::deactivate(void) {
surajdagar 0:2bfa06d10e28 158 uint8_t data;
surajdagar 0:2bfa06d10e28 159
surajdagar 0:2bfa06d10e28 160 data = readRegister(_address, CTRL_REG1);
surajdagar 0:2bfa06d10e28 161 data &= ~POWER_UP;
surajdagar 0:2bfa06d10e28 162 writeRegister(_address, CTRL_REG1, data);
surajdagar 0:2bfa06d10e28 163 return true;
surajdagar 0:2bfa06d10e28 164 }
surajdagar 0:2bfa06d10e28 165
surajdagar 0:2bfa06d10e28 166
surajdagar 0:2bfa06d10e28 167 int HTS221::bduActivate(void) {
surajdagar 0:2bfa06d10e28 168 uint8_t data;
surajdagar 0:2bfa06d10e28 169
surajdagar 0:2bfa06d10e28 170 data = readRegister(_address, CTRL_REG1);
surajdagar 0:2bfa06d10e28 171 data |= BDU_SET;
surajdagar 0:2bfa06d10e28 172 writeRegister(_address, CTRL_REG1, data);
surajdagar 0:2bfa06d10e28 173
surajdagar 0:2bfa06d10e28 174 return true;
surajdagar 0:2bfa06d10e28 175 }
surajdagar 0:2bfa06d10e28 176
surajdagar 0:2bfa06d10e28 177
surajdagar 0:2bfa06d10e28 178 int HTS221::bduDeactivate(void) {
surajdagar 0:2bfa06d10e28 179 uint8_t data;
surajdagar 0:2bfa06d10e28 180
surajdagar 0:2bfa06d10e28 181 data = readRegister(_address, CTRL_REG1);
surajdagar 0:2bfa06d10e28 182 data &= ~BDU_SET;
surajdagar 0:2bfa06d10e28 183 writeRegister(_address, CTRL_REG1, data);
surajdagar 0:2bfa06d10e28 184 return true;
surajdagar 0:2bfa06d10e28 185 }
surajdagar 0:2bfa06d10e28 186
surajdagar 0:2bfa06d10e28 187
surajdagar 0:2bfa06d10e28 188 int HTS221::readHumidity(void) {
surajdagar 0:2bfa06d10e28 189 uint8_t data = 0;
surajdagar 0:2bfa06d10e28 190 uint16_t h_out = 0;
surajdagar 0:2bfa06d10e28 191 double h_temp = 0.0;
surajdagar 0:2bfa06d10e28 192 double hum = 0.0;
surajdagar 0:2bfa06d10e28 193
surajdagar 0:2bfa06d10e28 194 data = readRegister(_address, STATUS_REG);
surajdagar 0:2bfa06d10e28 195
surajdagar 0:2bfa06d10e28 196 if (data & HUMIDITY_READY) {
surajdagar 0:2bfa06d10e28 197 data = readRegister(_address, HUMIDITY_H_REG);
surajdagar 0:2bfa06d10e28 198 h_out = data << 8; // MSB
surajdagar 0:2bfa06d10e28 199 data = readRegister(_address, HUMIDITY_L_REG);
surajdagar 0:2bfa06d10e28 200 h_out |= data; // LSB
surajdagar 0:2bfa06d10e28 201
surajdagar 0:2bfa06d10e28 202 // Decode Humidity
surajdagar 0:2bfa06d10e28 203 hum = ((int16_t)(_h1_rH) - (int16_t)(_h0_rH))/2.0; // remove x2 multiple
surajdagar 0:2bfa06d10e28 204
surajdagar 0:2bfa06d10e28 205 // Calculate humidity in decimal of grade centigrades i.e. 15.0 = 150.
surajdagar 0:2bfa06d10e28 206 h_temp = (((int16_t)h_out - (int16_t)_H0_T0) * hum) / ((int16_t)_H1_T0 - (int16_t)_H0_T0);
surajdagar 0:2bfa06d10e28 207 hum = ((int16_t)_h0_rH) / 2.0; // remove x2 multiple
surajdagar 0:2bfa06d10e28 208 _humidity = (int16_t)((hum + h_temp)); // provide signed % measurement unit
surajdagar 0:2bfa06d10e28 209 }
surajdagar 0:2bfa06d10e28 210 return _humidity;
surajdagar 0:2bfa06d10e28 211 }
surajdagar 0:2bfa06d10e28 212
surajdagar 0:2bfa06d10e28 213
surajdagar 0:2bfa06d10e28 214
surajdagar 0:2bfa06d10e28 215 double HTS221::readTemperature(void) {
surajdagar 0:2bfa06d10e28 216 uint8_t data = 0;
surajdagar 0:2bfa06d10e28 217 uint16_t t_out = 0;
surajdagar 0:2bfa06d10e28 218 double t_temp = 0.0;
surajdagar 0:2bfa06d10e28 219 double deg = 0.0;
surajdagar 0:2bfa06d10e28 220
surajdagar 0:2bfa06d10e28 221 data = readRegister(_address, STATUS_REG);
surajdagar 0:2bfa06d10e28 222
surajdagar 0:2bfa06d10e28 223 if (data & TEMPERATURE_READY) {
surajdagar 0:2bfa06d10e28 224
surajdagar 0:2bfa06d10e28 225 data= readRegister(_address, TEMP_H_REG);
surajdagar 0:2bfa06d10e28 226 t_out = data << 8; // MSB
surajdagar 0:2bfa06d10e28 227 data = readRegister(_address, TEMP_L_REG);
surajdagar 0:2bfa06d10e28 228 t_out |= data; // LSB
surajdagar 0:2bfa06d10e28 229
surajdagar 0:2bfa06d10e28 230 // Decode Temperature
surajdagar 0:2bfa06d10e28 231 deg = ((int16_t)(_T1_degC) - (int16_t)(_T0_degC))/8.0; // remove x8 multiple
surajdagar 0:2bfa06d10e28 232
surajdagar 0:2bfa06d10e28 233 // Calculate Temperature in decimal of grade centigrades i.e. 15.0 = 150.
surajdagar 0:2bfa06d10e28 234 t_temp = (((int16_t)t_out - (int16_t)_T0_OUT) * deg) / ((int16_t)_T1_OUT - (int16_t)_T0_OUT);
surajdagar 0:2bfa06d10e28 235 deg = ((int16_t)_T0_degC) / 8.0; // remove x8 multiple
surajdagar 0:2bfa06d10e28 236 _temperature = deg + t_temp; // provide signed celsius measurement unit
surajdagar 0:2bfa06d10e28 237 }
surajdagar 0:2bfa06d10e28 238
surajdagar 0:2bfa06d10e28 239 return _temperature;
surajdagar 0:2bfa06d10e28 240 }