Einstein Filho / MY_MLX

Mangue Baja Personalized MLX program

my_mlx.cpp@0:b8c679416b97, 2019-08-01 (annotated)

Committer:
einsteingustavo
Date:
Thu Aug 01 11:41:20 2019 +0000
Revision:
0:b8c679416b97
Mangue Baja personalized MLX program

Who changed what in which revision?

UserRevisionLine numberNew contents of line
einsteingustavo 0:b8c679416b97 1 /***************************************************
einsteingustavo 0:b8c679416b97 2 This is a library for the MLX90614 Temp Sensor
einsteingustavo 0:b8c679416b97 3 Designed specifically to work with the MLX90614 sensors in the
einsteingustavo 0:b8c679416b97 4 adafruit shop
einsteingustavo 0:b8c679416b97 5 ----> https://www.adafruit.com/products/1748
einsteingustavo 0:b8c679416b97 6 ----> https://www.adafruit.com/products/1749
einsteingustavo 0:b8c679416b97 7 These sensors use I2C to communicate, 2 pins are required to
einsteingustavo 0:b8c679416b97 8 interface
einsteingustavo 0:b8c679416b97 9 Adafruit invests time and resources providing this open source code,
einsteingustavo 0:b8c679416b97 10 please support Adafruit and open-source hardware by purchasing
einsteingustavo 0:b8c679416b97 11 products from Adafruit!
einsteingustavo 0:b8c679416b97 12 Written by Limor Fried/Ladyada for Adafruit Industries.
einsteingustavo 0:b8c679416b97 13 BSD license, all text above must be included in any redistribution
einsteingustavo 0:b8c679416b97 14 ****************************************************/
einsteingustavo 0:b8c679416b97 15
einsteingustavo 0:b8c679416b97 16 #include "my_mlx.h"
einsteingustavo 0:b8c679416b97 17
einsteingustavo 0:b8c679416b97 18 //Adafruit_MLX90614::Adafruit_MLX90614(uint8_t i2caddr) {
einsteingustavo 0:b8c679416b97 19 // _addr = i2caddr;
einsteingustavo 0:b8c679416b97 20 //}
einsteingustavo 0:b8c679416b97 21
einsteingustavo 0:b8c679416b97 22 Adafruit_MLX90614::Adafruit_MLX90614(PinName sda, PinName scl)
einsteingustavo 0:b8c679416b97 23 {
einsteingustavo 0:b8c679416b97 24 i2c_ = new I2C(sda, scl);
einsteingustavo 0:b8c679416b97 25 i2c_->frequency(400000);
einsteingustavo 0:b8c679416b97 26 }
einsteingustavo 0:b8c679416b97 27
einsteingustavo 0:b8c679416b97 28 Adafruit_MLX90614::Adafruit_MLX90614(I2C *i2c) : i2c_(i2c) {
einsteingustavo 0:b8c679416b97 29 }
einsteingustavo 0:b8c679416b97 30
einsteingustavo 0:b8c679416b97 31 Adafruit_MLX90614::~Adafruit_MLX90614() {
einsteingustavo 0:b8c679416b97 32 delete i2c_;
einsteingustavo 0:b8c679416b97 33 }
einsteingustavo 0:b8c679416b97 34
einsteingustavo 0:b8c679416b97 35 //////////////////////////////////////////////////////
einsteingustavo 0:b8c679416b97 36
einsteingustavo 0:b8c679416b97 37
einsteingustavo 0:b8c679416b97 38 double Adafruit_MLX90614::readObjectTempF(void) {
einsteingustavo 0:b8c679416b97 39 return (readTemp(MLX90614_TOBJ1) * 9 / 5) + 32;
einsteingustavo 0:b8c679416b97 40 }
einsteingustavo 0:b8c679416b97 41
einsteingustavo 0:b8c679416b97 42
einsteingustavo 0:b8c679416b97 43 double Adafruit_MLX90614::readAmbientTempF(void) {
einsteingustavo 0:b8c679416b97 44 return (readTemp(MLX90614_TA) * 9 / 5) + 32;
einsteingustavo 0:b8c679416b97 45 }
einsteingustavo 0:b8c679416b97 46
einsteingustavo 0:b8c679416b97 47 double Adafruit_MLX90614::readObjectTempC(void) {
einsteingustavo 0:b8c679416b97 48 return readTemp(MLX90614_TOBJ1);
einsteingustavo 0:b8c679416b97 49 }
einsteingustavo 0:b8c679416b97 50
einsteingustavo 0:b8c679416b97 51
einsteingustavo 0:b8c679416b97 52 double Adafruit_MLX90614::readAmbientTempC(void) {
einsteingustavo 0:b8c679416b97 53 return readTemp(MLX90614_TA);
einsteingustavo 0:b8c679416b97 54 }
einsteingustavo 0:b8c679416b97 55
einsteingustavo 0:b8c679416b97 56 float Adafruit_MLX90614::readTemp(uint8_t reg) {
einsteingustavo 0:b8c679416b97 57 float temp;
einsteingustavo 0:b8c679416b97 58
einsteingustavo 0:b8c679416b97 59 temp = read16(reg);
einsteingustavo 0:b8c679416b97 60 temp *= .02;
einsteingustavo 0:b8c679416b97 61 temp -= 273.15;
einsteingustavo 0:b8c679416b97 62 return temp;
einsteingustavo 0:b8c679416b97 63 }
einsteingustavo 0:b8c679416b97 64
einsteingustavo 0:b8c679416b97 65 /*********************************************************************/
einsteingustavo 0:b8c679416b97 66
einsteingustavo 0:b8c679416b97 67 uint16_t Adafruit_MLX90614::read16(uint8_t a) {
einsteingustavo 0:b8c679416b97 68 uint16_t ret;
einsteingustavo 0:b8c679416b97 69 char cmd[3] = { 0 };
einsteingustavo 0:b8c679416b97 70
einsteingustavo 0:b8c679416b97 71 //Wire.beginTransmission(_addr); // start transmission to device
einsteingustavo 0:b8c679416b97 72 i2c_->write(_addr,cmd,1,true);
einsteingustavo 0:b8c679416b97 73 //Wire.write(a); // sends register address to read from
einsteingustavo 0:b8c679416b97 74 //Wire.endTransmission(false); // end transmission
einsteingustavo 0:b8c679416b97 75
einsteingustavo 0:b8c679416b97 76 // Wire.requestFrom(_addr, (uint8_t)3);// send data n-bytes read
einsteingustavo 0:b8c679416b97 77 ret = i2c_->read(_addr,cmd,3); // receive DATA
einsteingustavo 0:b8c679416b97 78 ret |= i2c_->read(_addr,cmd,3) << 8; // receive DATA
einsteingustavo 0:b8c679416b97 79
einsteingustavo 0:b8c679416b97 80 uint8_t pec = i2c_->read(_addr,cmd,3);
einsteingustavo 0:b8c679416b97 81
einsteingustavo 0:b8c679416b97 82 return ret;
einsteingustavo 0:b8c679416b97 83 }