Diff: SDcard.hpp

Revision:

12:4c7eaac8ceef

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/SDcard.hpp	Mon Dec 31 19:20:22 2018 +0000
@@ -0,0 +1,105 @@
+#ifndef _SDCARD_ 
+#define _SDCARD_  
+#include "mbed.h" 
+#include "SDBlockDevice.h" 
+#include "FATFileSystem.h" 
+#include "sample_hardware.hpp" 
+
+  
+
+class SDcard 
+
+{     
+
+    private: 
+     float temp;       //current temperature of sensor 
+     float pressure;  //current pressure of sensor 
+     float fLDR;      //current light level from LDR 
+
+      void update_temp(double t) //use this function to update the current temperature value 
+            { 
+                temp = t; 
+            }  
+
+        void update_pressure(double p) //use this function to update the current pressure value 
+            { 
+                pressure = p;     
+            }  
+
+        void update_LDR(double L) 
+            { 
+                fLDR = L;    
+            } 
+
+        
+
+    public: 
+    EventQueue SDcard_Queue; 
+    
+     SDcard(){                      //constructor, 
+
+    }    
+
+   
+
+      ~SDcard(){                      //Deconstructor,  
+
+    }
+
+
+
+
+      void update_sensor_info(sample_message msg) //updates all current sensor information, this is called by a ticker every 5 seconds to read from the mailbox 
+    { 
+         update_temp(msg.temp);                  // Include message class passing of data 
+         update_pressure(msg.pressure); 
+         update_LDR(msg.ldr); 
+    } 
+    
+
+
+
+    void Save_Data() {          
+
+      
+    // initalising the SD card 
+    if ( sd.init() != 0) {
+        printf("Init failed \n");
+        errorCode(FATAL);
+    }     
+
+    //Create a filing system for SD Card 
+
+    FATFileSystem fs("sd", &sd);
+        
+    FILE* fp = fopen("/sd/SensorData.csv","a");
+
+    if (fp == NULL) {
+        error("Could not open file for write\n");
+        errorCode(FATAL);
+    } 
+
+    //Storing sensor data in csv file 
+
+    fprintf(fp, " Temperature(C) , %4.2f , Pressure(mbar) , %4.2f , Lux , %4.2f \n", temp , pressure , fLDR );
+
+    //Close the file
+    fclose(fp); 
+
+   //Close down SD card 
+    sd.deinit(); 
+    
+    errorCode(OK);
+    
+        temp = 0;
+        pressure = 0;
+        fLDR = 0;
+        
+   } 
+}; 
+// creating the instance SD of the class SDcard 
+
+
+SDcard m_oSD; 
+
+#endif
\ No newline at end of file