Revision 3:61e6bd867047, committed 2015-07-15

Comitter:

nmoorthy2001

Date:

Wed Jul 15 09:21:34 2015 +0000

Parent:

2:53965de58fda

Commit message:

RFID reader with 16x2 LCD, TeraTerm

Changed in this revision

diff -r 53965de58fda -r 61e6bd867047 main.cpp
--- a/main.cpp	Sat May 09 09:29:16 2015 +0000
+++ b/main.cpp	Wed Jul 15 09:21:34 2015 +0000
@@ -1,16 +1,23 @@
-//  Program for reading and matching RFID tags
-
 #include "mbed.h"
 #include "TextLCD.h"
-
+ 
 Serial rx(NC, PTA1); // uart rx
 Serial pc(USBTX, USBRX);
 TextLCD lcd(PTA13, PTD5, PTD0, PTD1, PTD2, PTD3, TextLCD::LCD16x2); // RS, E, D4-D7
-
-
+ 
+ 
 int count = 0;
 int input[12];
 bool flag = 0;
+char a[12]= "1518";
+char b[12]= "151F";
+
+char d[12]="\0";
+int i=0;
+int k;
+int numa=0;
+int numb=0;
+int numc=0;
 
 int main() 
 {
@@ -19,7 +26,7 @@
     lcd.printf("RF ID:");
     
     rx.baud(9600);
-
+ 
     while(1) 
     {
     /*  if (rx.readable()) 
@@ -27,7 +34,7 @@
             pc.printf("%02x\n", rx.getc());
         }
     */
-
+ 
         if(rx.readable()) 
         {
             count = 0;
@@ -35,11 +42,46 @@
             {
                 input[count] = rx.getc();
                 pc.printf("%d  %c\n", count, input[count]);
+                if(input[count]==a[i])
+                {
+                    d[i]=a[i];
+                    goto inc;
+                }
+                else if(input[count]==b[i])
+                {
+                    d[i]=a[i];
+                    goto inc;
+                }
+        
+                else
+                {
+                    pc.printf("not valid/n");
+                    exit(0);
+                }
                 lcd.locate(count,1);
                 lcd.putc(input[count]);
-                count++;       
+                
+            
+                inc:    count++; 
+                if(count==12)
+                {
+                    k=strcmp(a,d);
+                    if(k==0)
+                    {
+                        numa=numa+1;
+                        pc.printf("Attendance taken\n");
+                        pc.printf("%d",numa);
+                    }
+                    k=strcmp(b,d);
+                    if(k==0)
+                    {
+                        numb=numb+1;
+                        lcd.printf("Attendance taken\n");
+                        pc.printf("%d",numb);
+                    }
+                }   
             }
         }
     }
-
-}
+ 
+}
\ No newline at end of file