tube_test.c

来自「数码管驱动以及检测文件,S3C2410Linux」· C语言 代码 · 共 68 行

#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/ioctl.h>


int main()
{
	int fd;
	int c;
	char buf[2];
	

	fd=open("/dev/tube/0",O_RDWR);
	if(fd < 0){
		printf("####DEMO  device open fail####\n");
		return (-1);
	}


    while(1)
    {

        while(1)
        {


            fputs("Please input an integer between 0-99, number 0 will quit: ", stdout);
      
            if ( scanf("%d", &buf[0]) != EOF ) {

                while ( (c=getchar()) != '\n' && c != EOF ) {

                    ;

                } /* end of while */
            }
            if(buf[0]==0) break;   // quit 
            if(buf[0]>99 || buf[0]<0)
            {
                printf("Please input the  number between 0-99\n");
            }
            else
            {    
            break;
            }

        }

        if(buf[0]==0) break;
        printf("what you want to show is: %d\n", buf[0]);

            
        write(fd,&buf[0],sizeof(char));
    //  printf("if you want to quit ,please input q ");
    // if (getchar() =='q' ||getchar()=='Q')   break;
            
    // sleep(1);    
    }

	close(fd);
	return 0;

}