Edutech IoT Team / SI1145

si1145 library

Dependents:   FRDM_ApplicationShield_GroveSensors

SI1145.cpp@1:8587b5583343, 2015-05-29 (annotated)

Committer:
caseyquinn
Date:
Fri May 29 13:52:22 2015 +0000
Revision:
1:8587b5583343
Parent:
0:0490a77adbc5
Child:
3:efef49daeb13
changed outputs from float values to uint16_t

Who changed what in which revision?

UserRevisionLine numberNew contents of line
ngood 0:0490a77adbc5 1 /**
ngood 0:0490a77adbc5 2 * SI1145 Digital UV Index / IR / Visible Light Sensor library
ngood 0:0490a77adbc5 3 * @author N Good
ngood 0:0490a77adbc5 4 * @date 5-May-2015
ngood 0:0490a77adbc5 5 * Library for "SI1145 Digital UV Index / IR / Visible Light Sensor" from adafruit
ngood 0:0490a77adbc5 6 * https://www.adafruit.com/products/1777
ngood 0:0490a77adbc5 7 */
ngood 0:0490a77adbc5 8
ngood 0:0490a77adbc5 9 #include "mbed.h"
ngood 0:0490a77adbc5 10 #include "SI1145.h"
ngood 0:0490a77adbc5 11
ngood 0:0490a77adbc5 12 SI1145::SI1145(PinName sda, PinName scl, char slave_adr)
ngood 0:0490a77adbc5 13 :
ngood 0:0490a77adbc5 14 i2c_p(new I2C(sda, scl)),
ngood 0:0490a77adbc5 15 i2c(*i2c_p),
ngood 0:0490a77adbc5 16 address(slave_adr),
ngood 0:0490a77adbc5 17 t_fine(0)
ngood 0:0490a77adbc5 18 {
ngood 0:0490a77adbc5 19 initalize();
ngood 0:0490a77adbc5 20 }
ngood 0:0490a77adbc5 21
ngood 0:0490a77adbc5 22 SI1145::SI1145(I2C &i2c_obj, char slave_adr)
ngood 0:0490a77adbc5 23 :
ngood 0:0490a77adbc5 24 i2c_p(NULL),
ngood 0:0490a77adbc5 25 i2c(i2c_obj),
ngood 0:0490a77adbc5 26 address(slave_adr),
ngood 0:0490a77adbc5 27 t_fine(0)
ngood 0:0490a77adbc5 28 {
ngood 0:0490a77adbc5 29 initalize();
ngood 0:0490a77adbc5 30 }
ngood 0:0490a77adbc5 31
ngood 0:0490a77adbc5 32 //SI1145::~SI1145()
ngood 0:0490a77adbc5 33 //{
ngood 0:0490a77adbc5 34 // if (NULL != i2c_p)
ngood 0:0490a77adbc5 35 // delete i2c_p;
ngood 0:0490a77adbc5 36 //}
ngood 0:0490a77adbc5 37
ngood 0:0490a77adbc5 38 void SI1145::initalize(void) {
ngood 0:0490a77adbc5 39 uint16_t idu;
ngood 0:0490a77adbc5 40 //i2c.frequency(100000);
ngood 0:0490a77adbc5 41 char id[1] = {0x00};
ngood 0:0490a77adbc5 42 i2c.write(address,id,1);
ngood 0:0490a77adbc5 43 char data[1] = {0};
ngood 0:0490a77adbc5 44 i2c.read(address,data,1);
ngood 0:0490a77adbc5 45 float idf;
ngood 0:0490a77adbc5 46 idu = data[0];
ngood 0:0490a77adbc5 47 idf = (float)idu;
ngood 0:0490a77adbc5 48 pc.printf("%4.0f ID\n",idf);
ngood 0:0490a77adbc5 49 // reset______________________________________________
ngood 0:0490a77adbc5 50 //write MEASRATE0
ngood 0:0490a77adbc5 51 char MEASRATE0[2] = {0x08,0x0};
ngood 0:0490a77adbc5 52 i2c.write(address,MEASRATE0,2);
ngood 0:0490a77adbc5 53 //write MEASRATE1
ngood 0:0490a77adbc5 54 char MEASRATE1[2] = {0x09,0x0};
ngood 0:0490a77adbc5 55 i2c.write(address,MEASRATE1,2);
ngood 0:0490a77adbc5 56 //write visQEN
ngood 0:0490a77adbc5 57 char visQEN[2] = {0x04,0x0};
ngood 0:0490a77adbc5 58 i2c.write(address,visQEN,2);
ngood 0:0490a77adbc5 59 // visQMODE1
ngood 0:0490a77adbc5 60 char visQMODE1[2] = {0x05,0x0};
ngood 0:0490a77adbc5 61 i2c.write(address,visQMODE1,2);
ngood 0:0490a77adbc5 62 //write visQMODE2
ngood 0:0490a77adbc5 63 char visQMODE2[2] = {0x06,0x0};
ngood 0:0490a77adbc5 64 i2c.write(address,visQMODE2,2);
ngood 0:0490a77adbc5 65 //write INTCFG
ngood 0:0490a77adbc5 66 char INTCFG[2] = {0x03,0x0};
ngood 0:0490a77adbc5 67 i2c.write(address,INTCFG,2);
ngood 0:0490a77adbc5 68 //write visQSTAT
ngood 0:0490a77adbc5 69 char visQSTAT[2] = {0x21,0xFF};
ngood 0:0490a77adbc5 70 i2c.write(address,visQSTAT,2);
ngood 0:0490a77adbc5 71 //write COMMAND
ngood 0:0490a77adbc5 72 char COMMAND[2] = {0x18,0x01};
ngood 0:0490a77adbc5 73 i2c.write(address,COMMAND,2);
ngood 0:0490a77adbc5 74 // wait
ngood 0:0490a77adbc5 75 wait(100/1000);
ngood 0:0490a77adbc5 76 //write HWKEY
ngood 0:0490a77adbc5 77 char HWKEY[2] = {0x07, 0x17};
ngood 0:0490a77adbc5 78 i2c.write(address,HWKEY,2);
ngood 0:0490a77adbc5 79 // wait
ngood 0:0490a77adbc5 80 wait(100/1000);
ngood 0:0490a77adbc5 81 //__________________________________________________________
ngood 0:0490a77adbc5 82 // enable UVindex measurement coefficients!
ngood 0:0490a77adbc5 83 char REG_UCOEFF0[2] = {0x13,0x29};
ngood 0:0490a77adbc5 84 i2c.write(address, REG_UCOEFF0, 2);
ngood 0:0490a77adbc5 85 char REG_UCOEFF1[2] = {0x14,0x89};
ngood 0:0490a77adbc5 86 i2c.write(address, REG_UCOEFF1, 2);
ngood 0:0490a77adbc5 87 char REG_UCOEFF2[2] = {0x15,0x02};
ngood 0:0490a77adbc5 88 i2c.write(address, REG_UCOEFF2, 2);
ngood 0:0490a77adbc5 89 char REG_UCOEFF3[2] = {0x16,0x00};
ngood 0:0490a77adbc5 90 i2c.write(address, REG_UCOEFF3, 2);
ngood 0:0490a77adbc5 91 //__________________________________________________________
ngood 0:0490a77adbc5 92
ngood 0:0490a77adbc5 93 // enable UV sensor
ngood 0:0490a77adbc5 94 char PARAM_CHLIST[2] = {0x17, 0x80 | 0x20 | 0x10 | 0x01};
ngood 0:0490a77adbc5 95 i2c.write(address, PARAM_CHLIST, 2);
ngood 0:0490a77adbc5 96 char COMMD_CHLIST[2] = {0x18, 0x01 | 0xA0};
ngood 0:0490a77adbc5 97 i2c.write(address, COMMD_CHLIST, 2);
ngood 0:0490a77adbc5 98 // enable interrupt on every sample
ngood 0:0490a77adbc5 99 char REG_INTCFG[2] = {0x03,0x01};
ngood 0:0490a77adbc5 100 i2c.write(address, REG_INTCFG, 2);
ngood 0:0490a77adbc5 101 char REG_visQEN[2] = {0x04,0x01};
ngood 0:0490a77adbc5 102 i2c.write(address, REG_visQEN, 2);
ngood 0:0490a77adbc5 103 // program proximity sensor LED current
ngood 0:0490a77adbc5 104 char REG_PSLED21[2] = {0x0F,0x03};
ngood 0:0490a77adbc5 105 i2c.write(address, REG_PSLED21, 2); // 20mA for LED 1 only
ngood 0:0490a77adbc5 106 char PARAM_ADCMUX_LARGEvis[2] = {0x17, 0x03};
ngood 0:0490a77adbc5 107 i2c.write(address, PARAM_ADCMUX_LARGEvis, 2);
ngood 0:0490a77adbc5 108 char PARAM_PS1ADCMUX[2] = {0x18, 0x07 | 0xA0};
ngood 0:0490a77adbc5 109 i2c.write(address, PARAM_PS1ADCMUX, 2);
ngood 0:0490a77adbc5 110 // prox sensor #1 uses LED #1
ngood 0:0490a77adbc5 111 char PARAM_PSLED12SEL_PS1LED1[2] = {0x17, 0x01};
ngood 0:0490a77adbc5 112 i2c.write(address, PARAM_PSLED12SEL_PS1LED1, 2);
ngood 0:0490a77adbc5 113 char PARAM_PSLED12SEL[2] = {0x18, 0x02 | 0xA0};
ngood 0:0490a77adbc5 114 i2c.write(address, PARAM_PSLED12SEL, 2);
ngood 0:0490a77adbc5 115 // fastest clocks, clock div 1
ngood 0:0490a77adbc5 116 char PARAM_0[2] = {0x17, 0x0 | 0xA0};
ngood 0:0490a77adbc5 117 i2c.write(address, PARAM_0, 2);
ngood 0:0490a77adbc5 118 char PARAM_PSADCGAIN[2] = {0x18, 0x0B};
ngood 0:0490a77adbc5 119 i2c.write(address, PARAM_PSADCGAIN, 2);
ngood 0:0490a77adbc5 120 // take 511 clocks to measure
ngood 0:0490a77adbc5 121 char PARAM_ADCCOUNTER_511CLK[2] = {0x17, 0x70};
ngood 0:0490a77adbc5 122 i2c.write(address, PARAM_ADCCOUNTER_511CLK, 2);
ngood 0:0490a77adbc5 123 char PARAM_PSADCOUNTER[2] = {0x18, 0x0A | 0xA0};
ngood 0:0490a77adbc5 124 i2c.write(address, PARAM_PSADCOUNTER, 2);
ngood 0:0490a77adbc5 125 // in prox mode, high range
ngood 0:0490a77adbc5 126 char PARAM_PSADCMISC_RANGE_PARAM_PSADCMISC_PSMODE[2] = {0x17, 0x20 | 0x04};
ngood 0:0490a77adbc5 127 i2c.write(address, PARAM_PSADCMISC_RANGE_PARAM_PSADCMISC_PSMODE, 2);
ngood 0:0490a77adbc5 128 char PARAM_PSADCMISC[2] = {0x18, 0x0C | 0xA0};
ngood 0:0490a77adbc5 129 i2c.write(address, PARAM_PSADCMISC, 2);
ngood 0:0490a77adbc5 130 //
ngood 0:0490a77adbc5 131 char PARAM_ADCMUX_SMALLvis[2] = {0x17, 0x00};
ngood 0:0490a77adbc5 132 i2c.write(address, PARAM_ADCMUX_SMALLvis, 2);
ngood 0:0490a77adbc5 133 char PARAM_ALSvisADCMUX[2] = {0x18, 0x0E | 0xA0};
ngood 0:0490a77adbc5 134 i2c.write(address, PARAM_ALSvisADCMUX, 2);
ngood 0:0490a77adbc5 135 // fastest clocks, clock div 1
ngood 0:0490a77adbc5 136 i2c.write(address, PARAM_0, 2);
ngood 0:0490a77adbc5 137 char PARAM_ALSvisADCGAIN[2] = {0x18, 0x1E | 0xA0};
ngood 0:0490a77adbc5 138 i2c.write(address, PARAM_ALSvisADCGAIN, 2);
ngood 0:0490a77adbc5 139 // take 511 clocks to measure
ngood 0:0490a77adbc5 140 i2c.write(address, PARAM_ADCCOUNTER_511CLK, 2);
ngood 0:0490a77adbc5 141 char PARAM_ALSvisADCOUNTER[2] = {0x18, 0x1D | 0xA0};
ngood 0:0490a77adbc5 142 i2c.write(address, PARAM_ALSvisADCOUNTER, 2);
ngood 0:0490a77adbc5 143 // in high range mode
ngood 0:0490a77adbc5 144 char PARAM_ALSvisADCMISC_RANGE[2] = {0x17, 0x20};
ngood 0:0490a77adbc5 145 i2c.write(address, PARAM_ALSvisADCMISC_RANGE, 2);
ngood 0:0490a77adbc5 146 char PARAM_ALSvisADCMISC[2] = {0x18, 0x1F | 0xA0};
ngood 0:0490a77adbc5 147 i2c.write(address, PARAM_ALSvisADCMISC, 2);
ngood 0:0490a77adbc5 148 // fastest clocks, clock div 1
ngood 0:0490a77adbc5 149 char PARAM_000[2] = {0x17, 0x0};
ngood 0:0490a77adbc5 150 i2c.write(address, PARAM_000, 2);
ngood 0:0490a77adbc5 151 char PARAM_ALSuvADCGAIN[2] = {0x18, 0x11 | 0xA0};
ngood 0:0490a77adbc5 152 i2c.write(address, PARAM_ALSuvADCGAIN, 2);
ngood 0:0490a77adbc5 153 // take 511 clocks to measure
ngood 0:0490a77adbc5 154 i2c.write(address, PARAM_ADCCOUNTER_511CLK, 2);
ngood 0:0490a77adbc5 155 char PARAM_ALSuvADCOUNTER[2] = {0x18, 0x10 | 0xA0};
ngood 0:0490a77adbc5 156 i2c.write(address, PARAM_ALSuvADCOUNTER, 2);
ngood 0:0490a77adbc5 157 // in high range mode (not normal signal)
ngood 0:0490a77adbc5 158 char PARAM_ALSuvADCMISC_uvRANGE[2] = {0x17, 0x20};
ngood 0:0490a77adbc5 159 i2c.write(address, PARAM_ALSuvADCMISC_uvRANGE, 2);
ngood 0:0490a77adbc5 160 char PARAM_ALSuvADCMISC[2] = {0x18, 0x12 | 0xA0};
ngood 0:0490a77adbc5 161 i2c.write(address, PARAM_ALSuvADCMISC, 2);
ngood 0:0490a77adbc5 162 // measurement rate for auto
ngood 0:0490a77adbc5 163 char REG_MEASRATE0[2] = {0x08,0xFF};
ngood 0:0490a77adbc5 164 i2c.write(address, REG_MEASRATE0, 2);// 255 * 31.25uS = 8ms
ngood 0:0490a77adbc5 165 // auto run
ngood 0:0490a77adbc5 166 char REG_COMMAND[2] = {0x18,0x0F};
ngood 0:0490a77adbc5 167 i2c.write(address, REG_COMMAND, 2);
ngood 0:0490a77adbc5 168 }
ngood 0:0490a77adbc5 169
caseyquinn 1:8587b5583343 170 uint16_t SI1145::getUV()
ngood 0:0490a77adbc5 171 {
ngood 0:0490a77adbc5 172 // Variables
caseyquinn 1:8587b5583343 173 //float valf; // uv value
ngood 0:0490a77adbc5 174 char reg[1]; // register
ngood 0:0490a77adbc5 175 char data[2] = {0,0}; // data 2 x 8 bits
ngood 0:0490a77adbc5 176 uint16_t vali; // uv value
ngood 0:0490a77adbc5 177 // Set register
ngood 0:0490a77adbc5 178 reg[0] = 0x2C;
ngood 0:0490a77adbc5 179 // Read registers
ngood 0:0490a77adbc5 180 i2c.write(address, reg, 1);
ngood 0:0490a77adbc5 181 i2c.read(address, data, 2);
ngood 0:0490a77adbc5 182 // Merge bytes
ngood 0:0490a77adbc5 183 vali = data[0] | (data[1] << 8); // int
caseyquinn 1:8587b5583343 184 //valf = (float)vali; // convert to float
ngood 0:0490a77adbc5 185 // Return value
caseyquinn 1:8587b5583343 186 return vali;
ngood 0:0490a77adbc5 187 }
ngood 0:0490a77adbc5 188
caseyquinn 1:8587b5583343 189 uint16_t SI1145::getVIS()
ngood 0:0490a77adbc5 190 {
ngood 0:0490a77adbc5 191 // Variables
caseyquinn 1:8587b5583343 192 //float valf; // vis (IR+UV) value
ngood 0:0490a77adbc5 193 char reg[1]; // register
ngood 0:0490a77adbc5 194 char data[2] = {0,0}; // data 2 x 8 bits
ngood 0:0490a77adbc5 195 uint16_t vali; // vis value
ngood 0:0490a77adbc5 196 // Set register
ngood 0:0490a77adbc5 197 reg[0] = 0x22;
ngood 0:0490a77adbc5 198 // Read registers
ngood 0:0490a77adbc5 199 i2c.write(address, reg, 1);
ngood 0:0490a77adbc5 200 i2c.read(address, data, 2);
ngood 0:0490a77adbc5 201 // Merge bytes
ngood 0:0490a77adbc5 202 vali = data[0] | (data[1] << 8); // int
caseyquinn 1:8587b5583343 203 //valf = (float)vali; // convert to float
ngood 0:0490a77adbc5 204 // Return value
caseyquinn 1:8587b5583343 205 return vali;
ngood 0:0490a77adbc5 206 }
ngood 0:0490a77adbc5 207
caseyquinn 1:8587b5583343 208 uint16_t SI1145::getIR()
ngood 0:0490a77adbc5 209 {
ngood 0:0490a77adbc5 210 // Variables
caseyquinn 1:8587b5583343 211 //float valf; // ir value
ngood 0:0490a77adbc5 212 char reg[1]; // register
ngood 0:0490a77adbc5 213 char data[2] = {0,0}; // data 2 x 8 bits
ngood 0:0490a77adbc5 214 uint16_t vali; // ir value
ngood 0:0490a77adbc5 215 // Set register
ngood 0:0490a77adbc5 216 reg[0] = 0x24;
ngood 0:0490a77adbc5 217 // Read registers
ngood 0:0490a77adbc5 218 i2c.write(address, reg, 1);
ngood 0:0490a77adbc5 219 i2c.read(address, data, 2);
ngood 0:0490a77adbc5 220 // Merge bytes
ngood 0:0490a77adbc5 221 vali = data[0] | (data[1] << 8); // int
caseyquinn 1:8587b5583343 222 //valf = (float)vali; // convert to float
ngood 0:0490a77adbc5 223 // Return value
caseyquinn 1:8587b5583343 224 return vali;
ngood 0:0490a77adbc5 225 }
ngood 0:0490a77adbc5 226
caseyquinn 1:8587b5583343 227 uint16_t SI1145::getPROX()
ngood 0:0490a77adbc5 228 {
ngood 0:0490a77adbc5 229 // Variables
caseyquinn 1:8587b5583343 230 //float valf; // prox value
ngood 0:0490a77adbc5 231 char reg[1]; // register
ngood 0:0490a77adbc5 232 char data[2] = {0,0}; // data 2 x 8 bits
ngood 0:0490a77adbc5 233 uint16_t vali; // prox value
ngood 0:0490a77adbc5 234 // Set register
ngood 0:0490a77adbc5 235 reg[0] = 0x26;
ngood 0:0490a77adbc5 236 // Read registers
ngood 0:0490a77adbc5 237 i2c.write(address, reg, 1);
ngood 0:0490a77adbc5 238 i2c.read(address, data, 2);
ngood 0:0490a77adbc5 239 // Merge bytes
ngood 0:0490a77adbc5 240 vali = data[0] | (data[1] << 8); // int
caseyquinn 1:8587b5583343 241 //valf = (float)vali; // convert to float
ngood 0:0490a77adbc5 242 // Return value
caseyquinn 1:8587b5583343 243 return vali;
ngood 0:0490a77adbc5 244 }
ngood 0:0490a77adbc5 245