C-Source Comm-Problem

C_Source/prog.c

@@ -1,6 +1,5 @@
 //Define Constants---------------------------------------------------
-#define USB_PORT /dev/ttyACM3
-#define PAGESIZE 64
+typedef enum {false, true} bool; 
 
 //Include Header Files-----------------------------------------------
 #include<stdlib.h>
@@ -15,7 +14,7 @@
 #include<sys/resource.h>
 
 //Prototypes---------------------------------------------------------
-void delay(int delay_time);
+int delay(int delay_time);
 void print_attrTermios(struct termios * ptr_attr);
 
 //+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
@@ -32,7 +31,7 @@ int main(int argc, const char * argv[]){
 	struct termios * ptr_attr = (struct termios *)
 									malloc(sizeof(struct termios));
 	if(ptr_attr==NULL){
-		printf("ERROR: Termios not available \n");
+		printf("ERROR: Termios not available! \n");
 		return 0;
 	}
 	tcgetattr(USB, ptr_attr);
@@ -42,22 +41,48 @@ int main(int argc, const char * argv[]){
 	(*ptr_attr).c_lflag = 0;
 	cfsetspeed(ptr_attr, B19200);
 	tcsetattr(USB, TCSANOW ,ptr_attr);
+
+	char req[] = {'R', 'E', 'Q'};
+	char ack[] = {'A', 'C', 'K'};
+	char input[3];
+	char page[] = "PAGE";
+	char * ptr_req = &req[0];
+	char * ptr_ack = &ack[0];
+	char * ptr_input = &input[0];
+	char * ptr_page = &page[0];
+	int connection;
 	delay(1000);
 
 //Establishing  Connection-------------------------------------------
-	char req[] = "REQ";
-	char ack[] = "ACK";
-	char * ptr_ack = &ack[0];
-	char * ptr_input = (char *)malloc(3*sizeof(char));
-		char * ptr_req = &req[0];
-		while(1){
-			write(USB, ptr_req, 3*sizeof(char));
-//			tcflush(USB, TCIFLUSH);
-			read(USB, ptr_input, 3*sizeof(char));
-//			tcflush(USB, TCOFLUSH);
-			printf("%s \n", &ptr_input[0]);
+	write(USB, ptr_req, sizeof(req));
+	tcflush(USB, TCIFLUSH);
+	read(USB, ptr_input, sizeof(input));
+	tcflush(USB, TCOFLUSH);
+	ptr_input = &input[0];
+	for(int i=0; i<3; i++){
+		connection = false;
+		if(input[i]!=ack[i]){
+			break;
 		}
-		//delay(100);
+		connection = true;
+	}
+	if(connection==true){
+			printf("Connection Success! \n");
+	}
+	else{
+			printf("Connection Failed! \n");
+	}
+
+//Sending Page-------------------------------------------------------
+	for(int i=0; i<64; i++){
+		write(USB, ptr_page, sizeof(char));
+		tcflush(USB, TCIFLUSH);
+		ptr_page++;
+		if(ptr_page> & page[3]){
+			ptr_page = &page[0];
+		}
+	}
+	printf("Page send! \n");
 	close(USB);
 	return EXIT_SUCCESS;
 }	
@@ -66,10 +91,11 @@ int main(int argc, const char * argv[]){
 
 
 //Delay-Function-----------------------------------------------------
-void delay(int delay_time){
+int delay(int delay_time){
 	clock_t time1 = clock();
 	while(((clock()-time1)/CLOCKS_PER_SEC)*1000
 			 							!= (clock_t)delay_time);
+	return 1;
 }
 
 //Print Termios-Attributes-------------------------------------------