Diff: main.cpp

Revision:

1:34ff3ee532bd

Parent:

0:b1167ebd51d9

Child:

2:57bffc6f5df3

--- a/main.cpp	Thu Mar 03 16:32:10 2016 +0000
+++ b/main.cpp	Tue Apr 19 01:59:20 2016 +0000
@@ -0,0 +1,80 @@
+#include "mbed.h"
+#include "SDFileSystem.h"
+
+SDFileSystem fs(p5, p6, p7, p8, "fs");
+
+Serial pc(USBTX, USBRX);
+AnalogIn pot(p16);
+Timer t;
+Timer taverage; //Seperate Timer for data average
+Ticker sampleTime;
+FILE *fp;
+bool mountFailure;
+int test_time = 300; //Length of test in seconds
+void writeData();
+DigitalOut led1(LED1); //Mbed LED for SD Card Verification
+DigitalOut Red(p17); //Red LED in Pod
+DigitalOut Purple(p18); //Purple LED in Pod
+
+int main()
+{
+    mountFailure = fs.mount();
+    if (mountFailure !=0) 
+    {  
+        pc.printf("Failed to mount the SD card. \n\r");
+        return -1;
+    }
+   else if (mountFailure == 0)
+    {
+         for (int i=0; i<10; i++)
+            {
+                led1 = 1;
+                wait (.5);
+                led1=0;
+                wait (.5);
+            }
+    }
+    fp = fopen("/fs/dataLog.txt", "w");
+    if (fp==NULL)
+    {
+        pc.printf("Failed to open the file.\n\r");
+        return -1;
+    }
+    
+    fprintf(fp, "Time (s) /t Voltage (V)\n\r");
+    
+    t.start();
+    sampleTime.attach(&writeData, 1);
+    
+    while (t.read()<test_time)
+    {
+       
+       
+    }
+    sampleTime.detach();
+    fclose(fp);  
+    for (int i=0; i<10; i++) //Signals end of program for lab test purposes
+        {
+            led1 = 1;               
+            wait (.5);
+            led1 = 0;
+            wait (.5);
+        }     
+}
+
+void writeData() 
+{
+    float sum = 0;
+    for(int i=0;i<10;i++) //Takes 10 data points per second and finds average
+        {                   //Hoping to avoid the waves created by 60 Hz noise in lab
+            if(taverage.read()>.1)
+            {
+            sum = sum + pot.read();
+            taverage.reset();
+            }
+            
+        }
+    float average = sum/10;
+    
+    fprintf(fp, "%.2f \t %.4f\n\r", t.read(), 3.3*average); //Standard file input
+}
\ No newline at end of file