test_org.c~

linux下hpi口驱动程序

#include <stdio.h>

#include <sys/types.h>

#include <sys/stat.h>

#include <fcntl.h>

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

init_para[0] =  0x81230000;
// 参数判断
if (argc != 2 ) {
	printf("The program need 2 arguments \n");
	exit(0);}
if (*argv[1] != 'w' & *argv[1] != 'r'){
	printf("The second argument must be 'w' or 'r' \n");
	exit(0);}

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

}

//初始化寄存器
pos = 4;
offp = lseek(testdev,pos,0);
if(write(testdev,&init_para[0],1))
    printf("test.c: init Reg ok \n");
else 
    printf("test.c: init Reg fail \n");


//移动文件位置
//pos = (long)*argv[2];
//printf("argv[2] : %c\n",*argv[2]);

printf("pos : %lx\n",pos);
printf("offp is %p\n",offp);

//printf("input offset :");
//scanf("%lx",&pos);
pos = 8;
offp =lseek(testdev,pos,0);

// 读写判断
if (*argv[1] == 'w') {
	if(write(testdev,buf,10))
    		printf("test.c: write ok \n");
	else 
		printf("test.c: write fail \n");}
else if (* argv[1] == 'r') {
	if(read(testdev,buf,10))
		printf("test.c: read ok \n");
	else 
		printf("test.c: read fail \n");}

//设备关闭
close(testdev);

return 0;
}