Diff: main.cpp

Revision:

15:0f8871dd3324

Parent:

14:5a55a41dc118

Child:

16:ca9f769ff024

--- a/main.cpp	Tue Apr 14 04:11:25 2015 +0000
+++ b/main.cpp	Thu Apr 16 02:45:37 2015 +0000
@@ -22,6 +22,7 @@
 unsigned char temp, data[MAX], crc_calc; //temp byte storage, storage array, transmitted crc value
 unsigned char preamble, address, i, j, k; //increment variables
 unsigned char data_flag, rflag, d_flag, done, temp_data; //data flags
+int crc_passed = 0; //crc flag
 int temp_crc = 0; //stores values for crc check.
 
 //funtion prototypes
@@ -44,6 +45,7 @@
     i = 0;
     d_flag = 0;
     done = 0;
+    crc_passed=0;
 
     //clear lcd screen, print current build message
     lcd.cls();
@@ -98,6 +100,7 @@
                 crc_calc = read_byte(NIBBLE);
                 if(check_crc(temp_crc, crc_calc))
                 {
+                    crc_passed=1;
                     lcd.cls();
                     lcd.locate(0,3);
                     lcd.printf("Data passes CRC verification");    
@@ -117,12 +120,17 @@
     //stop and reset the timer
     t.stop();
     t.reset();       
+    if(crc_passed){//if crc passes display data, send ACK
     //clear debugging messages - and reset lcd to original position before printing data.
+    //send ACK
     lcd.cls();
     lcd.locate(0,3);
     lcd.printf("Received: ");
     for(k=0; k<=i; k++)
         lcd.printf("%c", data[k]);
+    }else{//if crc fails, send NOACK
+        
+        }
 }
 
 void check_byte(int value)
@@ -190,7 +198,7 @@
     {
         rflag = 1;
         lcd.printf("Multicast received");
-    }
+    }//can add if Network==0 and address==x send to x in every network
     else
         printf("Wrong address received");