Diff: SDCard.hpp

Revision:

20:2ce28a5032d5

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/SDCard.hpp	Wed Jan 02 12:12:30 2019 +0000
@@ -0,0 +1,119 @@
+#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 getSerial2SD() // Queue Consumer
+        {
+            if (!Serial2SD.empty())
+            {
+                osEvent evt = Serial2SD.get(); 
+        switch (evt.status) 
+                {
+                    case osEventMail:
+                //Normal status
+                                SD_message *mail = (SD_message*)evt.value.p;
+                                // Pass onto a decoder/ handler
+                                // i.e. InputHandler(message) // Will inspect the difference parameters in the structure and proceed accordingly
+                                Serial2SD.free(mail);   // Free up the space in the memory Pool
+                    default:
+                //All other errors (see cmsis_os.h for meaning of error code)
+                //printf("Serial2Net->get() returned %02x status\n\r", evt.status);
+                }               
+            }
+        }
+
+      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() {          
+    //Create a filing system for SD Card 
+
+                        // initalising the SD card 
+            if ( sd.init() != 0) {
+                    printf("Init failed \n");
+                    //errorCode(FATAL);
+            }  
+            
+    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);
+  
+        
+   } 
+}; 
+// creating the instance SD of the class SDcard 
+
+
+SDcard m_oSD; 
+
+#endif
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