PARK JAICHANG / TSL2561

TSL2561

Dependents:   Hexi_TSL2561 HexiHeart_Main

Fork of TSL2561 by Kenji Arai

TSL2561.cpp@0:eec7bcd27c52, 2015-02-22 (annotated)

Committer:
kenjiArai
Date:
Sun Feb 22 01:19:56 2015 +0000
Revision:
0:eec7bcd27c52
Child:
1:25a700e9b8ec
Luminosity sensor by Texas Advanced Optoelectronic Solutions Inc.. Device combines one broadband photodiode (visible plus infrared) and one infrared-responding photodiode. Set Gain x1 and  402mS as default.

Who changed what in which revision?

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 0:eec7bcd27c52 6 * Copyright (c) 2015 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 0:eec7bcd27c52 9 * Created: Feburary 21st, 2015
kenjiArai 0:eec7bcd27c52 10 * Revised: Feburary 22nd, 2015
kenjiArai 0:eec7bcd27c52 11 *
kenjiArai 0:eec7bcd27c52 12 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
kenjiArai 0:eec7bcd27c52 13 * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE
kenjiArai 0:eec7bcd27c52 14 * AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
kenjiArai 0:eec7bcd27c52 15 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
kenjiArai 0:eec7bcd27c52 16 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
kenjiArai 0:eec7bcd27c52 17 */
kenjiArai 0:eec7bcd27c52 18
kenjiArai 0:eec7bcd27c52 19 #include "TSL2561.h"
kenjiArai 0:eec7bcd27c52 20
kenjiArai 0:eec7bcd27c52 21 TSL2561::TSL2561 (PinName p_sda, PinName p_scl) : _i2c(p_sda, p_scl)
kenjiArai 0:eec7bcd27c52 22 {
kenjiArai 0:eec7bcd27c52 23 TSL2561_addr = TSL2561_ADDRESS_GND;
kenjiArai 0:eec7bcd27c52 24 init();
kenjiArai 0:eec7bcd27c52 25 }
kenjiArai 0:eec7bcd27c52 26
kenjiArai 0:eec7bcd27c52 27 TSL2561::TSL2561 (PinName p_sda, PinName p_scl, uint8_t addr) : _i2c(p_sda, p_scl)
kenjiArai 0:eec7bcd27c52 28 {
kenjiArai 0:eec7bcd27c52 29 TSL2561_addr = addr;
kenjiArai 0:eec7bcd27c52 30 init();
kenjiArai 0:eec7bcd27c52 31 }
kenjiArai 0:eec7bcd27c52 32
kenjiArai 0:eec7bcd27c52 33 TSL2561::TSL2561 (I2C& p_i2c) : _i2c(p_i2c)
kenjiArai 0:eec7bcd27c52 34 {
kenjiArai 0:eec7bcd27c52 35 TSL2561_addr = TSL2561_ADDRESS_GND;
kenjiArai 0:eec7bcd27c52 36 init();
kenjiArai 0:eec7bcd27c52 37 }
kenjiArai 0:eec7bcd27c52 38
kenjiArai 0:eec7bcd27c52 39 TSL2561::TSL2561 (I2C& p_i2c, uint8_t addr) : _i2c(p_i2c)
kenjiArai 0:eec7bcd27c52 40 {
kenjiArai 0:eec7bcd27c52 41 TSL2561_addr = addr;
kenjiArai 0:eec7bcd27c52 42 init();
kenjiArai 0:eec7bcd27c52 43 }
kenjiArai 0:eec7bcd27c52 44
kenjiArai 0:eec7bcd27c52 45 /////////////// Read Lux from sensor //////////////////////
kenjiArai 0:eec7bcd27c52 46 /*
kenjiArai 0:eec7bcd27c52 47 For 0 < CH1/CH0 < 0.50 Lux = 0.0304 x CH0-0.062 x CH0 x ((CH1/CH0)1.4)
kenjiArai 0:eec7bcd27c52 48 For 0.50 < CH1/CH0 < 0.61 Lux = 0.0224 x CH0-0.031 x CH1
kenjiArai 0:eec7bcd27c52 49 For 0.61 < CH1/CH0 < 0.80 Lux = 0.0128 x CH0-0.0153 x CH1
kenjiArai 0:eec7bcd27c52 50 For 0.80 < CH1/CH0 < 1.30 Lux = 0.00146 x CH0-0.00112x CH1
kenjiArai 0:eec7bcd27c52 51 For CH1/CH0 > 1.30 Lux = 0
kenjiArai 0:eec7bcd27c52 52 */
kenjiArai 0:eec7bcd27c52 53 float TSL2561::lux()
kenjiArai 0:eec7bcd27c52 54 {
kenjiArai 0:eec7bcd27c52 55 double lux0, lux1;
kenjiArai 0:eec7bcd27c52 56 double ratio;
kenjiArai 0:eec7bcd27c52 57 double dlux;
kenjiArai 0:eec7bcd27c52 58
kenjiArai 0:eec7bcd27c52 59 dt[0] = CMD_MULTI + TSL2561_DATA0LOW;
kenjiArai 0:eec7bcd27c52 60 _i2c.write((int)TSL2561_addr, (char *)dt, 1, true);
kenjiArai 0:eec7bcd27c52 61 _i2c.read(TSL2561_addr, (char *)dt, 2, false);
kenjiArai 0:eec7bcd27c52 62 ch0 = dt[1] << 8 | dt[0];
kenjiArai 0:eec7bcd27c52 63 dt[0] = CMD_MULTI + TSL2561_DATA1LOW;
kenjiArai 0:eec7bcd27c52 64 _i2c.write((int)TSL2561_addr, (char *)dt, 1, true);
kenjiArai 0:eec7bcd27c52 65 _i2c.read(TSL2561_addr, (char *)dt, 2, false);
kenjiArai 0:eec7bcd27c52 66 ch1 = dt[1] << 8 | dt[0];
kenjiArai 0:eec7bcd27c52 67 lux0 = ch0;
kenjiArai 0:eec7bcd27c52 68 lux1 = ch1;
kenjiArai 0:eec7bcd27c52 69 ratio = lux1 / lux0;
kenjiArai 0:eec7bcd27c52 70 if (ratio <= 0.5) {
kenjiArai 0:eec7bcd27c52 71 dlux = 0.03040 * lux0 - 0.06200 * lux0 * pow(ratio,1.4);
kenjiArai 0:eec7bcd27c52 72 } else if (ratio <= 0.61) {
kenjiArai 0:eec7bcd27c52 73 dlux = 0.02240 * lux0 - 0.03100 * lux1;
kenjiArai 0:eec7bcd27c52 74 } else if (ratio <= 0.80) {
kenjiArai 0:eec7bcd27c52 75 dlux = 0.01280 * lux0 - 0.01530 * lux1;
kenjiArai 0:eec7bcd27c52 76 } else if (ratio <= 1.30) {
kenjiArai 0:eec7bcd27c52 77 dlux = 0.00146 * lux0 - 0.00112 * lux1;
kenjiArai 0:eec7bcd27c52 78 } else {
kenjiArai 0:eec7bcd27c52 79 dlux = 0;
kenjiArai 0:eec7bcd27c52 80 }
kenjiArai 0:eec7bcd27c52 81 return (float)dlux;
kenjiArai 0:eec7bcd27c52 82 }
kenjiArai 0:eec7bcd27c52 83
kenjiArai 0:eec7bcd27c52 84 /////////////// Initialize ////////////////////////////////
kenjiArai 0:eec7bcd27c52 85 void TSL2561::init()
kenjiArai 0:eec7bcd27c52 86 {
kenjiArai 0:eec7bcd27c52 87 _i2c.frequency(100000);
kenjiArai 0:eec7bcd27c52 88 power_up();
kenjiArai 0:eec7bcd27c52 89 read_ID();
kenjiArai 0:eec7bcd27c52 90 }
kenjiArai 0:eec7bcd27c52 91
kenjiArai 0:eec7bcd27c52 92 /////////////// ID ////////////////////////////////////////
kenjiArai 0:eec7bcd27c52 93 uint16_t TSL2561::read_ID()
kenjiArai 0:eec7bcd27c52 94 {
kenjiArai 0:eec7bcd27c52 95 dt[0] = CMD_SINGLE + TSL2561_ID;
kenjiArai 0:eec7bcd27c52 96 _i2c.write((int)TSL2561_addr, (char *)dt, 1, true);
kenjiArai 0:eec7bcd27c52 97 _i2c.read(TSL2561_addr, (char *)dt, 2, false);
kenjiArai 0:eec7bcd27c52 98 id_number = dt[0] << 8 | dt[1];
kenjiArai 0:eec7bcd27c52 99 return id_number;
kenjiArai 0:eec7bcd27c52 100 }
kenjiArai 0:eec7bcd27c52 101
kenjiArai 0:eec7bcd27c52 102 uint8_t TSL2561::who_am_i()
kenjiArai 0:eec7bcd27c52 103 {
kenjiArai 0:eec7bcd27c52 104 read_ID();
kenjiArai 0:eec7bcd27c52 105 if ((id_number >> 4) == I_AM_TSL2561) {
kenjiArai 0:eec7bcd27c52 106 return 1;
kenjiArai 0:eec7bcd27c52 107 } else {
kenjiArai 0:eec7bcd27c52 108 return 0;
kenjiArai 0:eec7bcd27c52 109 }
kenjiArai 0:eec7bcd27c52 110 }
kenjiArai 0:eec7bcd27c52 111
kenjiArai 0:eec7bcd27c52 112 /////////////// Power ON/OFF //////////////////////////////
kenjiArai 0:eec7bcd27c52 113 void TSL2561::power_up()
kenjiArai 0:eec7bcd27c52 114 {
kenjiArai 0:eec7bcd27c52 115 dt[0] = CMD_SINGLE + TSL2561_CONTROL;
kenjiArai 0:eec7bcd27c52 116 dt[1] = 3;
kenjiArai 0:eec7bcd27c52 117 _i2c.write((int)TSL2561_addr, (char *)dt, 2, false);
kenjiArai 0:eec7bcd27c52 118 }
kenjiArai 0:eec7bcd27c52 119
kenjiArai 0:eec7bcd27c52 120 void TSL2561::power_down()
kenjiArai 0:eec7bcd27c52 121 {
kenjiArai 0:eec7bcd27c52 122 dt[0] = CMD_SINGLE + TSL2561_CONTROL;
kenjiArai 0:eec7bcd27c52 123 dt[1] = 0;
kenjiArai 0:eec7bcd27c52 124 _i2c.write((int)TSL2561_addr, (char *)dt, 2, false);
kenjiArai 0:eec7bcd27c52 125 }
kenjiArai 0:eec7bcd27c52 126
kenjiArai 0:eec7bcd27c52 127 /////////////// I2C Freq. /////////////////////////////////
kenjiArai 0:eec7bcd27c52 128 void TSL2561::frequency(int hz)
kenjiArai 0:eec7bcd27c52 129 {
kenjiArai 0:eec7bcd27c52 130 _i2c.frequency(hz);
kenjiArai 0:eec7bcd27c52 131 }