test.c

来自「linux下hpi口驱动程序」· C语言 代码 · 共 43 行

#include <stdio.h>

#include <sys/types.h>

#include <sys/stat.h>

#include <fcntl.h>

int main(int argc,char* argv[])
{
int testdev,i;
int buf[10]={1,2,3,4,5,6,7,8,9,0};
loff_t offp;
long pos;

// 设备打开	
testdev = open("/dev/HPI",O_RDWR);
if ( testdev == -1 )
{
printf("Cann't open file ");
exit(0);

}

//移动文件位置
pos = 0x201e0;
offp =lseek(testdev,pos,0);
printf("test :%x\n",offp);
write(testdev,buf,10);
pos = 0x201e0;
offp =lseek(testdev,pos,0);
printf("test :%x\n",offp);
read(testdev,buf,10);
for(i=0;i<10;i++)
	printf("test.c-> %x\n",buf[i]);
//设备关闭

close(testdev);

return 0;
}