Diff: SDReader.cpp

Revision:

0:2a4af0cb6e8d

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/SDReader.cpp	Thu Dec 06 15:38:09 2018 +0000
@@ -0,0 +1,133 @@
+#include "SDReader.hpp"
+#include "Button.hpp"
+
+// Thread for saving DATA to the SD card
+void SDThread(void)
+{
+    // Create object SD of the SDReader class with set SPI pins
+    SDReader SD(PB_5, D12, D13, D10); // mosi, miso, sclk, cs   
+    
+    // Create switch to dismount the SD card
+    BUTTON onBoardSwitch(USER_BUTTON);
+    
+    // Create variable to store state of SD card
+    enum State {MOUNTED, UNMOUNTED, MOUNTING, UNMOUNTING};
+    State Mounted = MOUNTING;
+    
+    while(1)
+    {
+        // FSM for each state of SD card
+        switch(Mounted)
+        {
+            case UNMOUNTED :
+                wait_ms(100);
+                if(onBoardSwitch.poll() == 1)
+                {
+                    Mounted = MOUNTING;
+                }
+            break;
+                
+            case MOUNTED :
+                //SD.UPLOAD(1.404f,0.303f,0.124f);
+                wait_ms(100);
+                if(onBoardSwitch.poll() == 1)
+                {
+                    Mounted = UNMOUNTING;
+                }
+            break;
+                
+            case UNMOUNTING :
+                SD.unmount();
+                Terminal_THREAD.signal_set(Signal_UnMount);
+                Mounted = UNMOUNTED;
+            break;
+            
+            case MOUNTING :
+                if(SD.INIT() == 0){
+                    Mounted = UNMOUNTED;
+                    Terminal_THREAD.signal_set(Signal_UnMount);
+                } else {
+                    Mounted = MOUNTED;  
+                }                
+            break;
+        }
+    }
+}
+
+BYTE SDReader::INIT(void)
+{
+    BYTE Mount;
+    
+    // call the SDBlockDevice instance initialisation method.
+    if(sd.init() != 0){
+        Mount = 0;
+    } else {
+        Mount = 1;
+    }
+    
+    if(Mount == 0){
+        return Mount;
+    } else {           
+        //Remove existing file
+        remove( "/sd/ELEC351.csv" );
+        
+        FILE* fp = fopen("/sd/ELEC351.csv","a+");
+        //Check file handle (stream)
+        if (fp == NULL) {
+            return Mount;
+        }
+            
+        //Put some text in the file...
+        fprintf(fp, " TIME STAMP, light, temperature, pressure\n");
+        
+        //Close the file
+        fclose(fp);
+        
+        return Mount;
+    }
+}
+
+void SDReader::UPLOAD(FLOAT_32 LIGHT, FLOAT_32 TEMP, FLOAT_32 PRESS)
+{   
+    FILE* fp = fopen("/sd/ELEC351.csv","a+");
+    //Check file handle (stream)
+    if (fp == NULL) {
+        return;
+    }
+    
+    //Put some text in the file...
+    fprintf(fp, " TIME STAMP, %1.4f, %1.4f, %1.4f\n", LIGHT, TEMP, PRESS);
+    
+    //Close the file
+    fclose(fp);
+}
+
+BYTE* SDReader::DOWNLOAD(void)
+{   
+    FILE* fp = fopen("/sd/ELEC351.csv","r");
+    if (fp == NULL) {
+
+    }   
+    
+    //Read back all strings
+    BYTE* s1 = new BYTE;
+    
+    //while (fscanf(fp, "%s", s1) == 1) 
+    //{
+    //
+    //}
+    
+    fgets(s1, sizeof(s1), fp);
+    
+    //Close File
+    fclose(fp);
+    
+    return s1;
+}
+
+void SDReader::unmount(void)
+{
+    sd.deinit();
+    return;
+}
+