新路程------imx6動態修改lvds channel
阿新 • • 發佈：2019-01-06
#include <linux/fb.h>
#include <stdio.h>
#include<sys/types.h>
#include<sys/stat.h>
#include<fcntl.h>
#include <linux/ioctl.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <linux/fb.h>
#include <sys/mman.h>
#include <math.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <linux/fb.h>
#include <sys/mman.h>
#define FBIOSET_CHANNEL0x4622
struct fb_var_screeninfo vinfo;
void main(int argc, char * argv[])
{
int fd = 0;
int channel;
int x =0;
channel=atoi(argv[1]);
printf("start ioctl \n");
// printf("matt-argc=%d\n",argc);
fd = open("/dev/fb0",O_RDWR);
if (fd < 0)
{
printf("matt-Open Dev Mem0 Error!\n");
}
sleep(5);
printf("matt-channel=%d\n",channel);
//選擇channel
/* if (ioctl(fd,FBIOSET_CHANNEL,&channel))
{
printf("Error writeing variable information/n");
exit(3);
} */
if (ioctl(fd,FBIOGET_VSCREENINFO,&vinfo))
{
printf("Error reading variable information/n");
exit(3);
}
close(fd);
done: exit(0);
#include <stdio.h>
#include<sys/types.h>
#include<sys/stat.h>
#include<fcntl.h>
#include <linux/ioctl.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <linux/fb.h>
#include <sys/mman.h>
#include <math.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <linux/fb.h>
#include <sys/mman.h>
#define FBIOSET_CHANNEL0x4622
struct fb_var_screeninfo vinfo;
void main(int argc, char * argv[])
{
int fd = 0;
int channel;
int x =0;
channel=atoi(argv[1]);
printf("start ioctl \n");
// printf("matt-argc=%d\n",argc);
fd = open("/dev/fb0",O_RDWR);
if (fd < 0)
{
printf("matt-Open Dev Mem0 Error!\n");
}
sleep(5);
printf("matt-channel=%d\n",channel);
//選擇channel
/* if (ioctl(fd,FBIOSET_CHANNEL,&channel))
{
printf("Error writeing variable information/n");
exit(3);
} */
if (ioctl(fd,FBIOGET_VSCREENINFO,&vinfo))
{
printf("Error reading variable information/n");
exit(3);
}
close(fd);
done: exit(0);