test app 메뉴 형식으로 뜨게 수정

--------------------
KERNEL Module Control
--------------------
1. LED ON
2. LED OFF
3. EXIT
-------------------
Command: 1

 

 

위의 형식으로 뜨게 수정

 

test app 만 수정

#include <unistd.h>
#include <fcntl.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>

int main(int argc, char **argv) {
   int dev = 0;
   char buff[1024] = { 0,};
   char cmd[40] = { 0,};
   dev = open("/dev/my_device2", O_RDWR); //open은 한번만 열면 됨
   while(1){
	   printf("--------------------\nKERNEL Module Control 1.0\n--------------------\n");
	   printf("1. LED ON\n2. LED OFF\n3. EXIT\n");
	   printf("-------------------\n");
	   printf("Command: ");
	   scanf("%s", cmd);
	   
	   if(!strcmp(cmd, "1")){
		   write(dev, cmd, strlen(cmd));
		   read(dev, buff, strlen(cmd));
		   printf("read from device : %s\n",buff);
	   }
	   else if(!strcmp(cmd, "2")){
		   //write(dev, cmd, strlen(cmd));
		   read(dev, buff, strlen(cmd));
		   printf("read from device : %s\n",buff);
	   }
	   
	   else if(!strcmp(cmd, "3")){
		   //write(dev, cmd, strlen(cmd));
		   //read(dev, buff, strlen(cmd));
		   printf("EXIT\n");
		   close(dev);
		   exit(0);
	   }
   }
   return 0;
}