Revision 0:fea9b4d9a373, committed 2016-02-10

Comitter:

Nikollao

Date:

Wed Feb 10 16:10:42 2016 +0000

Commit message:

now the library is ready to use;

Changed in this revision

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/TMP102.cpp	Wed Feb 10 16:10:42 2016 +0000
@@ -0,0 +1,82 @@
+#include "TMP102"
+
+TMP102::TMP102(PinName sda, PinName scl)
+{
+    is2_ = new I2C(sda,scl);
+    led_ = new DigitalOut(LED_RED);
+}
+
+ void TMP102::init() {
+    
+    i2c_->frequency(400000);
+    int ack;
+    char config_data[2];
+    char reg CONFIG_REG;
+    
+    ack = i2c_->write(TMP102_W_ADD,&reg,1);
+    
+    if (ack)
+        
+        error();
+        
+        i2c_->read(TMP102_R_ADD,&config_data,1);
+    
+    if (ack)
+        
+        error();
+      
+    //set conversion rate to 1 Hz  
+    config_data[1] |= (1<<6); //set bit 6
+    config_data[1] &= ~(1<<7); //clear bit 7
+    
+    char data_packet[3] = {reg, config_data[0], config_data[1]};
+    
+    ack = i2c_->write(TMP102_W_ADD,data_packet,3);
+    
+    if (ack)
+        error();
+        
+}
+
+void TMP102::read_temperature() {
+    
+    int ack;
+    char data[2];
+    char reg TEMP_REG;
+    
+    ack = i2c_->write (TMP102_W_ADD,&reg,1);
+    
+    if (ack) 
+        error();
+    
+    ack = i2c_->read(TMP102_R_ADD,data,2);
+    
+    if (ack)
+        error(); //if we don't receive acknowledgment, flash error message
+        
+    int temperature = (data[0] << 4) | (data[1] >> 4);
+    
+    temperature_ = temperature*0.0625F;
+    
+}
+
+float TMP102::get_temperature() {
+        
+        read_temperature();
+        return temperature_;
+}
+
+void TMP102::error() {
+        
+        while (1) {
+            
+            led_-> write(0);
+            wait(0.2);
+            led_> write(1);
+            wait(0.2);
+        }
+}
+        
+    
+    
+    
\ No newline at end of file

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/TMP102.h	Wed Feb 10 16:10:42 2016 +0000
@@ -0,0 +1,46 @@
+#ifndef TMP102_H
+#define TMP102_H
+
+//address for ADD0 connected to GND
+#define TMP102_ADD 0x48
+#define TMP102_R_ADD 0x91
+#define TMP102_W_ADD 0x90
+
+//register addresses
+
+#define TEMP_REG 0x00
+#define CONF_REG 0x01
+#define THIGH_REG 0x02
+#define TLOW_REG 0x03
+
+#include "mbed.h"
+
+class TMP102
+
+//define the methods that are public, which could be used by the user
+
+ public:
+ 
+TMP102(PinName sda, PinName scl);
+
+void init();
+
+float get_temperature;
+
+//define private methods, could be used in the library itself, but could not called by the user
+
+void error();
+
+void read_temperature();
+
+public:
+
+private:
+
+I2C* i2c_;
+DigitalOut* led;
+float temperature_;
+
+#endif
+
+