#include <stdio.h>#include <sys/types.h>#include <sys/stat.h>#include <fcntl.h>#include <unistd.h>#include <stdlib.h>//**********************#define       DEBUG//*********************int main(){        int fd;        int i,j,ret;        char buf[11];        fd=open("/dev/can_bus",O_RDWR);        if (fd<0)        {        printf("Error open can_bus\n");        }      #ifdef  DEBUG        printf("read begin!\n");#endif        ret=read(fd,buf,11);        printf("\nData received is:");//        sleep(10);		for(i=1;i<11;i++)	{	printf("%x",buf[i]);	}#ifdef  DEBUG        printf("\nread end!\n");#endif        }