videoshift.c

来自「videoshift.rar—HHARM9200.rar 华恒AT91rm920」· C语言 代码 · 共 33 行

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>

#define LCD 0
#define VGA 1
#define VIDEOSHIFT 0X6666
int main(int argc, char *argv[])
{
	int fd;
	int shift =LCD;
        if(argc>1)
	{
		if(strcmp(argv[1],"0")==0)
			shift = LCD;
		else if(strcmp(argv[1],"1")==0)
			shift = VGA;
		else
			printf("false parameter\n");

	} 

	if((fd = open("/dev/fb0",O_RDWR))<0)
	 	printf("Cannot open fb device!\n");
	ioctl(fd,VIDEOSHIFT,shift);
	close(fd);
	return 0;	
}