MLX90614 library. Working on both Mbed2 and Mbed5

Dependents:   MLX90614_Demo

Fork of MLX90614 by Hikaru Sugiura

Files at this revision

API Documentation at this revision

Comitter:
masrodjie
Date:
Fri May 04 07:29:44 2018 +0000
Parent:
4:dcd4fe76bd13
Commit message:
Fix library to working on latest Mbed2 & Mbed5

Changed in this revision

mlx90614.cpp Show annotated file Show diff for this revision Revisions of this file
mlx90614.h Show annotated file Show diff for this revision Revisions of this file
diff -r dcd4fe76bd13 -r 933b7db866c5 mlx90614.cpp
--- a/mlx90614.cpp	Thu Jun 09 13:50:26 2011 +0000
+++ b/mlx90614.cpp	Fri May 04 07:29:44 2018 +0000
@@ -14,34 +14,25 @@
 
 bool MLX90614::getTemp(float* temp_val){
 
-    char p1,p2,p3;
+    char data[3];
     float temp_thermo;
-    bool ch;
 
-    i2c->stop();                            //stop i2c if not ack
+    i2c->stop();
+    wait(0.02);
+    i2c->start();
     wait(0.01);
-    i2c->start();                           //start I2C                   
-    ch=i2c->write(i2caddress);              //device address with write condition
-    
-    if(!ch)return false;                    //No Ack, return False
-    
-    ch=i2c->write(0x07);                    //device ram address where Tobj value is present
-
-    if(!ch)return false;                    //No Ack, return False
+    data[0] = 0x00;
+    i2c->write((i2caddress<<1), data, 1, true);
+    wait(0.01);
+    data[0] = 0x07;
+    i2c->write((i2caddress<<1), data, 1, true);
+    wait(0.01);
+    i2c->read(((i2caddress<<1)|0x01), data, 3, true);
+    wait(0.01);
+    i2c->stop();                            //stop condition
 
 
-    i2c->start();                           //repeat start
-    ch=i2c->write(i2caddress|0x01);         //device address with read condition 
-    if(!ch)return false;                    //No Ack, return False
-
-    p1=i2c->read(1);     //Tobj low byte
-    p2=i2c->read(1);     //Tobj heigh byte
-    p3=i2c->read(0);     //PEC
-    
-    i2c->stop();                            //stop condition
-     
-    
-    temp_thermo=((((p2&0x007f)<<8)+p1)*0.02)-0.01;      //degree centigrate conversion
+    temp_thermo=((((data[1]&0x007f)<<8)+data[0])*0.02)-0.01;      //degree centigrate conversion
     *temp_val=temp_thermo-273;                          //Convert kelvin to degree Celsius
     
     return true;                            //load data successfully, return true 
diff -r dcd4fe76bd13 -r 933b7db866c5 mlx90614.h
--- a/mlx90614.h	Thu Jun 09 13:50:26 2011 +0000
+++ b/mlx90614.h	Fri May 04 07:29:44 2018 +0000
@@ -20,8 +20,8 @@
 * #include "mbed.h"
 * #include "mlx90614.h"
 *
-* I2C i2c(p28,p27);   //sda,scl
-* MLX90614 thermometer(&i2c);
+* I2C i2c(PB_9, PB_8);   //sda,scl
+* MLX90614 thermometer(&i2c, 0x5A);
 * float temp;
 *
 * void main(void){
@@ -41,9 +41,9 @@
         /** Create MLX90614 interface, initialize with selected I2C port and address.
         *
         * @param i2c I2C device pointer
-        * @param addr Device address(default=0xB4)  
+        * @param addr Device address(default=0x5A)  
         */    
-        MLX90614(I2C* i2c,int addr=0xB4);
+        MLX90614(I2C* i2c,int addr=0x5A);
         
         /** Get Temperature data from MLX90614. 
         *