read.c

Windows设备驱动程序设计 (*.ppt) intoduce about how to develop the windows driver

#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#define NUM 128
main()
{
int testdev;
int i;
unsigned char  buf[NUM];
for(i=0;i<NUM;i++)
	buf[i] = 0;

testdev = open("/dev/09449device",O_RDWR);
if ( testdev == -1 )
{
printf("Cann't open file \n");
exit(0);
}
read(testdev,buf,NUM);
close(testdev);
for(i=0;i<NUM;i+=16) 
  printf("%d %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d\n",buf[i+0],buf[i+1],buf[i+2],buf[i+3],buf[i+4],buf[i+5],buf[i+6],buf[i+7],buf[i+8],buf[i+9],buf[i+10],buf[i+11],buf[i+12],buf[i+13],buf[i+14],buf[i+15]);

}