EI2I_4_projet_1_2017-2018 / Mbed 2 deprecated Main_V3

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TSL2561.cpp@3:534235b99bc6, 2017-10-02 (annotated)

Committer:
ramialjed
Date:
Mon Oct 02 12:47:09 2017 +0000
Revision:
3:534235b99bc6
Parent:
2:17591031447b 
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UserRevisionLine numberNew contents of line
kenjiArai 0:eec7bcd27c52 1 /*
kenjiArai 0:eec7bcd27c52 2 * mbed library program
kenjiArai 0:eec7bcd27c52 3 * Luminosity sensor -- LIGHT-TO-DIGITAL CONVERTER (light intensity to a digital signal output)
kenjiArai 0:eec7bcd27c52 4 * TSL2561 by Texas Advanced Optoelectronic Solutions Inc.
kenjiArai 0:eec7bcd27c52 5 *
kenjiArai 2:17591031447b 6 * Copyright (c) 2015,'17 Kenji Arai / JH1PJL
kenjiArai 0:eec7bcd27c52 7 * http://www.page.sannet.ne.jp/kenjia/index.html
kenjiArai 0:eec7bcd27c52 8 * http://mbed.org/users/kenjiArai/
kenjiArai 2:17591031447b 9 * Created: Feburary 21st, 2015
kenjiArai 2:17591031447b 10 * Revised: August 23rd, 2017
kenjiArai 0:eec7bcd27c52 11 */
ramialjed 3:534235b99bc6 12
kenjiArai 0:eec7bcd27c52 13 #include "TSL2561.h"
ramialjed 3:534235b99bc6 14
kenjiArai 2:17591031447b 15 TSL2561::TSL2561 (PinName p_sda, PinName p_scl)
kenjiArai 2:17591031447b 16 : _i2c_p(new I2C(p_sda, p_scl)), _i2c(*_i2c_p)
kenjiArai 0:eec7bcd27c52 17 {
kenjiArai 0:eec7bcd27c52 18 TSL2561_addr = TSL2561_ADDRESS_GND;
kenjiArai 0:eec7bcd27c52 19 init();
kenjiArai 0:eec7bcd27c52 20 }
ramialjed 3:534235b99bc6 21
kenjiArai 2:17591031447b 22 TSL2561::TSL2561 (PinName p_sda, PinName p_scl, uint8_t addr)
kenjiArai 2:17591031447b 23 : _i2c_p(new I2C(p_sda, p_scl)), _i2c(*_i2c_p)
kenjiArai 0:eec7bcd27c52 24 {
kenjiArai 0:eec7bcd27c52 25 TSL2561_addr = addr;
kenjiArai 0:eec7bcd27c52 26 init();
kenjiArai 0:eec7bcd27c52 27 }
ramialjed 3:534235b99bc6 28
kenjiArai 2:17591031447b 29 TSL2561::TSL2561 (I2C& p_i2c)
kenjiArai 2:17591031447b 30 : _i2c(p_i2c)
kenjiArai 0:eec7bcd27c52 31 {
kenjiArai 0:eec7bcd27c52 32 TSL2561_addr = TSL2561_ADDRESS_GND;
kenjiArai 0:eec7bcd27c52 33 init();
kenjiArai 0:eec7bcd27c52 34 }
ramialjed 3:534235b99bc6 35
kenjiArai 2:17591031447b 36 TSL2561::TSL2561 (I2C& p_i2c, uint8_t addr)
kenjiArai 2:17591031447b 37 : _i2c(p_i2c)
kenjiArai 0:eec7bcd27c52 38 {
kenjiArai 0:eec7bcd27c52 39 TSL2561_addr = addr;
kenjiArai 0:eec7bcd27c52 40 init();
kenjiArai 0:eec7bcd27c52 41 }
ramialjed 3:534235b99bc6 42
kenjiArai 0:eec7bcd27c52 43 /////////////// Read Lux from sensor //////////////////////
kenjiArai 0:eec7bcd27c52 44 /*
kenjiArai 0:eec7bcd27c52 45 For 0 < CH1/CH0 < 0.50 Lux = 0.0304 x CH0-0.062 x CH0 x ((CH1/CH0)1.4)
kenjiArai 0:eec7bcd27c52 46 For 0.50 < CH1/CH0 < 0.61 Lux = 0.0224 x CH0-0.031 x CH1
kenjiArai 0:eec7bcd27c52 47 For 0.61 < CH1/CH0 < 0.80 Lux = 0.0128 x CH0-0.0153 x CH1
kenjiArai 0:eec7bcd27c52 48 For 0.80 < CH1/CH0 < 1.30 Lux = 0.00146 x CH0-0.00112x CH1
kenjiArai 0:eec7bcd27c52 49 For CH1/CH0 > 1.30 Lux = 0
kenjiArai 0:eec7bcd27c52 50 */
kenjiArai 0:eec7bcd27c52 51 float TSL2561::lux()
kenjiArai 0:eec7bcd27c52 52 {
kenjiArai 0:eec7bcd27c52 53 double lux0, lux1;
kenjiArai 0:eec7bcd27c52 54 double ratio;
kenjiArai 0:eec7bcd27c52 55 double dlux;
ramialjed 3:534235b99bc6 56
kenjiArai 0:eec7bcd27c52 57 dt[0] = CMD_MULTI + TSL2561_DATA0LOW;
kenjiArai 0:eec7bcd27c52 58 _i2c.write((int)TSL2561_addr, (char *)dt, 1, true);
kenjiArai 0:eec7bcd27c52 59 _i2c.read(TSL2561_addr, (char *)dt, 2, false);
kenjiArai 0:eec7bcd27c52 60 ch0 = dt[1] << 8 | dt[0];
kenjiArai 0:eec7bcd27c52 61 dt[0] = CMD_MULTI + TSL2561_DATA1LOW;
kenjiArai 0:eec7bcd27c52 62 _i2c.write((int)TSL2561_addr, (char *)dt, 1, true);
kenjiArai 0:eec7bcd27c52 63 _i2c.read(TSL2561_addr, (char *)dt, 2, false);
kenjiArai 0:eec7bcd27c52 64 ch1 = dt[1] << 8 | dt[0];
kenjiArai 1:25a700e9b8ec 65 if (ch0 == 0xFFFF) {
kenjiArai 1:25a700e9b8ec 66 return 2500.0;
kenjiArai 1:25a700e9b8ec 67 }
kenjiArai 1:25a700e9b8ec 68 lux0 = (double)ch0;
kenjiArai 1:25a700e9b8ec 69 lux1 = (double)ch1;
kenjiArai 0:eec7bcd27c52 70 ratio = lux1 / lux0;
kenjiArai 1:25a700e9b8ec 71 read_timing_reg();
kenjiArai 1:25a700e9b8ec 72 lux0 *= (402.0/integ_time);
kenjiArai 1:25a700e9b8ec 73 lux1 *= (402.0/integ_time);
kenjiArai 1:25a700e9b8ec 74 lux0 /= gain;
kenjiArai 1:25a700e9b8ec 75 lux1 /= gain;
kenjiArai 0:eec7bcd27c52 76 if (ratio <= 0.5) {
kenjiArai 0:eec7bcd27c52 77 dlux = 0.03040 * lux0 - 0.06200 * lux0 * pow(ratio,1.4);
kenjiArai 0:eec7bcd27c52 78 } else if (ratio <= 0.61) {
kenjiArai 0:eec7bcd27c52 79 dlux = 0.02240 * lux0 - 0.03100 * lux1;
kenjiArai 0:eec7bcd27c52 80 } else if (ratio <= 0.80) {
kenjiArai 0:eec7bcd27c52 81 dlux = 0.01280 * lux0 - 0.01530 * lux1;
kenjiArai 0:eec7bcd27c52 82 } else if (ratio <= 1.30) {
kenjiArai 0:eec7bcd27c52 83 dlux = 0.00146 * lux0 - 0.00112 * lux1;
kenjiArai 0:eec7bcd27c52 84 } else {
kenjiArai 0:eec7bcd27c52 85 dlux = 0;
kenjiArai 0:eec7bcd27c52 86 }
kenjiArai 0:eec7bcd27c52 87 return (float)dlux;
kenjiArai 0:eec7bcd27c52 88 }
ramialjed 3:534235b99bc6 89
kenjiArai 0:eec7bcd27c52 90 /////////////// Initialize ////////////////////////////////
kenjiArai 0:eec7bcd27c52 91 void TSL2561::init()
kenjiArai 0:eec7bcd27c52 92 {
kenjiArai 0:eec7bcd27c52 93 _i2c.frequency(100000);
kenjiArai 0:eec7bcd27c52 94 power_up();
kenjiArai 1:25a700e9b8ec 95 set_timing_reg(TIMING_DEFAULT);
kenjiArai 1:25a700e9b8ec 96 }
ramialjed 3:534235b99bc6 97
kenjiArai 1:25a700e9b8ec 98 /////////////// Timing Register ///////////////////////////
kenjiArai 1:25a700e9b8ec 99 uint8_t TSL2561::set_timing_reg(uint8_t parameter)
kenjiArai 1:25a700e9b8ec 100 {
kenjiArai 1:25a700e9b8ec 101 dt[0] = CMD_SINGLE + TSL2561_TIMING;
kenjiArai 1:25a700e9b8ec 102 dt[1] = parameter;
kenjiArai 1:25a700e9b8ec 103 _i2c.write((int)TSL2561_addr, (char *)dt, 2, false);
kenjiArai 1:25a700e9b8ec 104 dt[0] = CMD_SINGLE + TSL2561_TIMING;
kenjiArai 1:25a700e9b8ec 105 _i2c.write((int)TSL2561_addr, (char *)dt, 1, true);
kenjiArai 1:25a700e9b8ec 106 _i2c.read(TSL2561_addr, (char *)dt, 1, false);
kenjiArai 1:25a700e9b8ec 107 return dt[0];
kenjiArai 1:25a700e9b8ec 108 }
ramialjed 3:534235b99bc6 109
kenjiArai 1:25a700e9b8ec 110 uint8_t TSL2561::read_timing_reg(void)
kenjiArai 1:25a700e9b8ec 111 {
kenjiArai 1:25a700e9b8ec 112 uint8_t i;
ramialjed 3:534235b99bc6 113
kenjiArai 1:25a700e9b8ec 114 dt[0] = CMD_SINGLE + TSL2561_TIMING;
kenjiArai 1:25a700e9b8ec 115 _i2c.write((int)TSL2561_addr, (char *)dt, 1, true);
kenjiArai 1:25a700e9b8ec 116 _i2c.read(TSL2561_addr, (char *)dt, 1, false);
kenjiArai 1:25a700e9b8ec 117 if (dt[0] & TIMING_GAIN_16){
kenjiArai 1:25a700e9b8ec 118 gain = 16;
kenjiArai 1:25a700e9b8ec 119 } else {
kenjiArai 1:25a700e9b8ec 120 gain = 1;
kenjiArai 1:25a700e9b8ec 121 }
kenjiArai 1:25a700e9b8ec 122 i = dt[0] & 0x3;
kenjiArai 1:25a700e9b8ec 123 switch (i) {
kenjiArai 1:25a700e9b8ec 124 case 0:
kenjiArai 1:25a700e9b8ec 125 integ_time = 13.7;
kenjiArai 1:25a700e9b8ec 126 break;
kenjiArai 1:25a700e9b8ec 127 case 1:
kenjiArai 1:25a700e9b8ec 128 integ_time = 101.0;
kenjiArai 1:25a700e9b8ec 129 break;
kenjiArai 1:25a700e9b8ec 130 case 2:
kenjiArai 1:25a700e9b8ec 131 integ_time = 402.0;
kenjiArai 1:25a700e9b8ec 132 break;
kenjiArai 1:25a700e9b8ec 133 default:
kenjiArai 1:25a700e9b8ec 134 integ_time = 0;
kenjiArai 1:25a700e9b8ec 135 break;
kenjiArai 1:25a700e9b8ec 136 }
kenjiArai 1:25a700e9b8ec 137 return dt[0];
kenjiArai 0:eec7bcd27c52 138 }
ramialjed 3:534235b99bc6 139
kenjiArai 0:eec7bcd27c52 140 /////////////// ID ////////////////////////////////////////
kenjiArai 0:eec7bcd27c52 141 uint16_t TSL2561::read_ID()
kenjiArai 0:eec7bcd27c52 142 {
kenjiArai 0:eec7bcd27c52 143 dt[0] = CMD_SINGLE + TSL2561_ID;
kenjiArai 0:eec7bcd27c52 144 _i2c.write((int)TSL2561_addr, (char *)dt, 1, true);
kenjiArai 0:eec7bcd27c52 145 _i2c.read(TSL2561_addr, (char *)dt, 2, false);
kenjiArai 0:eec7bcd27c52 146 id_number = dt[0] << 8 | dt[1];
kenjiArai 0:eec7bcd27c52 147 return id_number;
kenjiArai 0:eec7bcd27c52 148 }
ramialjed 3:534235b99bc6 149
kenjiArai 0:eec7bcd27c52 150 uint8_t TSL2561::who_am_i()
kenjiArai 0:eec7bcd27c52 151 {
kenjiArai 0:eec7bcd27c52 152 read_ID();
kenjiArai 0:eec7bcd27c52 153 if ((id_number >> 4) == I_AM_TSL2561) {
kenjiArai 0:eec7bcd27c52 154 return 1;
kenjiArai 0:eec7bcd27c52 155 } else {
kenjiArai 0:eec7bcd27c52 156 return 0;
kenjiArai 0:eec7bcd27c52 157 }
kenjiArai 0:eec7bcd27c52 158 }
ramialjed 3:534235b99bc6 159
kenjiArai 0:eec7bcd27c52 160 /////////////// Power ON/OFF //////////////////////////////
kenjiArai 0:eec7bcd27c52 161 void TSL2561::power_up()
kenjiArai 0:eec7bcd27c52 162 {
kenjiArai 0:eec7bcd27c52 163 dt[0] = CMD_SINGLE + TSL2561_CONTROL;
kenjiArai 0:eec7bcd27c52 164 dt[1] = 3;
kenjiArai 0:eec7bcd27c52 165 _i2c.write((int)TSL2561_addr, (char *)dt, 2, false);
kenjiArai 0:eec7bcd27c52 166 }
ramialjed 3:534235b99bc6 167
kenjiArai 0:eec7bcd27c52 168 void TSL2561::power_down()
kenjiArai 0:eec7bcd27c52 169 {
kenjiArai 0:eec7bcd27c52 170 dt[0] = CMD_SINGLE + TSL2561_CONTROL;
kenjiArai 0:eec7bcd27c52 171 dt[1] = 0;
kenjiArai 0:eec7bcd27c52 172 _i2c.write((int)TSL2561_addr, (char *)dt, 2, false);
kenjiArai 0:eec7bcd27c52 173 }
ramialjed 3:534235b99bc6 174
kenjiArai 0:eec7bcd27c52 175 /////////////// I2C Freq. /////////////////////////////////
kenjiArai 0:eec7bcd27c52 176 void TSL2561::frequency(int hz)
kenjiArai 0:eec7bcd27c52 177 {
kenjiArai 0:eec7bcd27c52 178 _i2c.frequency(hz);
kenjiArai 0:eec7bcd27c52 179 }
ramialjed 3:534235b99bc6 180
ramialjed 3:534235b99bc6 181
ramialjed 3:534235b99bc6 182