Diff: main.cpp

Revision:

4:966ae598f73e

Parent:

3:53d2d440a695

--- a/main.cpp	Wed Jan 30 03:03:58 2019 +0000
+++ b/main.cpp	Fri Feb 15 03:23:22 2019 +0000
@@ -1,55 +1,50 @@
-
-
 #include "mbed.h"
 #include "x_cube_mems.h"
 
+// Create a DigitalOut objects for the LED
 DigitalOut led(LED1);
 
+// Create a Serial objects to communicate via USB
 Serial pc(USBTX, USBRX);
 
+// Create 2 Ticker objects for a recurring interrupts. One for blink a LED and the other one to update the sensor lectures periodicly.
 Ticker blinky; 
 Ticker update;
-
 volatile float TEMPERATURE_C;
-
-<<<<<<<<Declarations should be here >>>>>>>>>>
-
-
+volatile float TEMPERATURE_F;
+volatile float TEMPERATURE_K;
+volatile float HUMIDITY;
+volatile float PRESSURE;
 bool measurements_update = false;
-
 void blinky_handler(){
-    led = !led;
-}
-
+    led = !led;}
 void sensors_handler(){
     measurements_update = true;
 }
 
 int main() {
-    
-   
+        /* Create a sensor shield object */
     static X_CUBE_MEMS *Sensors = X_CUBE_MEMS::Instance();
     
-    
+    /* Attach a function to be called by the Ticker objects at a specific interval in seconds*/
     blinky.attach(&blinky_handler, 0.5);
     update.attach(&sensors_handler, 3);
     
     while(1) {
-
         if(measurements_update == true){
         /* Read the environmental sensors  */
-        
-            <<<<<<<<    your code should be here    >>>>>>>>>>
-            
+        Sensors->hts221.GetTemperature((float *)&TEMPERATURE_C);
+        Sensors->hts221.GetHumidity((float *)&HUMIDITY);
+        Sensors->lps25h.GetPressure((float *)&PRESSURE);
         
-        pc.printf("Temperature:\t %.2f C / %.2f F / %.2f K\r\n", TEMPERATURE_C, TEMPERATURE_F, TEMPERATURE_K);
-       
-    
-
-        pc.printf("\r\n");
-                
+TEMPERATURE_F = (TEMPERATURE_C * 1.8f) + 32.0f;     //Convert the temperature from Celsius to Fahrenheit
+TEMPERATURE_K = (TEMPERATURE_C + 273.15f);          //Convert the temperature from Celsius to Kelvin
+       pc.printf("Temperature:\t %.2f C / %.2f F / %.2f K\r\n", TEMPERATURE_C, TEMPERATURE_F, TEMPERATURE_K);
+        pc.printf("Humidity:\t %.2f%%\r\n", HUMIDITY);
+        pc.printf("Pressure:\t %.2f hPa\r\n", PRESSURE); 
+        pc.printf("\r\n");          
         measurements_update = false;
         }
         __wfi();
     }
-}
\ No newline at end of file
+}