linux 嵌入式驱动程序测试实例

#include
#include
#include
#include
#include
#include
#include
int main()
{
int fd,i,nwrite,nread;
char *buf = "hello/n";
char read_buf[6] = {0};
fd = open("/dev/fs",O_RDWR);
if( fd <= 0 )
{
perror("open");
exit(1);
}else
printf("open ok!");

nwrite = write(fd,buf,strlen(buf));
if( nwrite < 0 )
{
perror("write");
exit(1);
}
nread = read(fd,read_buf,6);
if( nread < 0 )
{
perror("read");
exit(1);
}
else
printf("read is %s/n",read_buf);
close(fd);
exit(0);
}

//查看结果
// /var/log/messages