test.c

Linux 下的字符驱动程序

#include <stdio.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>
char buf[128];
int main()
{
	int dev_test;
	dev_test=open("/dev/mydevice",O_RDWR);
	if(dev_test==-1)
	{	
		printf("\nCan't open the device!\n");
		return (-1);
	}
	printf("\nmy_device opend!");
	printf("\nreading...\n");
	read(dev_test,buf,128);
	printf(buf);
	printf("writing...\n");
	write(dev_test,"test",4);
	printf("my_device closed!\n");
	close(dev_test);

	return 0;
}