Simon Hawe / MLX90614

Recent implementation of a MLX90614 IR temperature sensor library based on the example code of Jonathan Jones. Working with the current I2C mbed library.

Dependents:   D7_MLX_AND_BAT

Fork of MLX90614 by Jens Strümper

MLX90614.cpp@1:b70477df5c75, 2017-02-17 (annotated)

Committer:
shawe
Date:
Fri Feb 17 12:51:18 2017 +0000
Revision:
1:b70477df5c75
Parent:
0:755bd47fd6be 
refactored;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
jensstruemper 0:755bd47fd6be 1 #include "MLX90614.h"
jensstruemper 0:755bd47fd6be 2
jensstruemper 0:755bd47fd6be 3 MLX90614::MLX90614(I2C *i2c) : i2c_(i2c) {
jensstruemper 0:755bd47fd6be 4 }
jensstruemper 0:755bd47fd6be 5
shawe 1:b70477df5c75 6 float MLX90614::readTemp(uint8_t reg) {
shawe 1:b70477df5c75 7 char cmd[3] = { 0 };
shawe 1:b70477df5c75 8 cmd[0] = ram_access | reg;
shawe 1:b70477df5c75 9 i2c_->write(default_addr, cmd, 1, true);
shawe 1:b70477df5c75 10 i2c_->read(default_addr, cmd, 3);
shawe 1:b70477df5c75 11 return 0.02f * static_cast<float>(((cmd[1] & 0x7F) << 8) | cmd[0]) - 273.15f;
shawe 1:b70477df5c75 12 }
shawe 1:b70477df5c75 13
shawe 1:b70477df5c75 14
shawe 1:b70477df5c75 15 float MLX90614::ambientTemp(){
shawe 1:b70477df5c75 16 return readTemp(T_ambient);
shawe 1:b70477df5c75 17 }
shawe 1:b70477df5c75 18
shawe 1:b70477df5c75 19 float MLX90614::objectTemp(){
shawe 1:b70477df5c75 20 return readTemp(T_obj1);
shawe 1:b70477df5c75 21 }