add line and i for row column

cubesatsim/cubesatsim.ino

@@ -4474,6 +4474,8 @@ void start_clockgen() {
 void print_file_hex(char* filename, int bytes) {
   Serial.println(" ");
   int count = 0;
+  int line = 0;
+  int i = 0;
   char buff[3];	
   File myFile = LittleFS.open(filename, "r"); 
   while (count < bytes) {
@@ -4485,6 +4487,11 @@ void print_file_hex(char* filename, int bytes) {
           if ((buff[0]!=0xff) || (buff[1]!=0xff) || (buff[2]!=0xff))
             Serial.printf("3Non white pixel at %d, %d R: %d G: %d B: %d\n", line, i, buff[0], buff[1],buff[2]);	  
     count += 3;	  
+    if (i++ > 319)
+    {
+	   i = 0;
+	   line++;
+    }
   }
   Serial.println(" ");	
   myFile.close();