kb.c

嵌入式下实验的新的驱动设计源代码

#include "/usr/src/arm/linux/include/asm/unistd.h"
#include <stdio.h>
#include <stdlib.h>

extern int errno;

int main()
{
        int fd, fd1;
	int value = 0;

        if ((fd1 = open("/dev/kbd7312", 0)) < 0) 
	{
                printf("cannot open /dev/kbd7312\n");
                exit(0);
        }
	printf("\nOpen!\n");
	for(;;)
	{
	        value=ioctl(fd1, 0, 0);
		printf("@@@=%d", value);
		
   	}
	return 0;
}