linux中怎么控制lcd

# 查看当前Framebuffer设置
fbset

# 设置分辨率和颜色深度（示例）
sudo fbset -xres 800 -yres 600 -vxres 800 -vyres 600 -depth 32

#include <fcntl.h>
#include <linux/fb.h>
#include <sys/mman.h>
#include <unistd.h>

int main() {
    int fbfd = open("/dev/fb0", O_RDWR);
    if (fbfd == -1) {
        perror("Error: cannot open framebuffer device");
        exit(1);
    }

    struct fb_var_screeninfo vinfo;
    if (ioctl(fbfd, FBIOGET_VSCREENINFO, &vinfo)) {
        perror("Error reading variable information");
        exit(3);
    }

    long screensize = vinfo.xres * vinfo.yres * vinfo.bits_per_pixel / 8;
    char *fbp = (char *)mmap(0, screensize, PROT_READ | PROT_WRITE, MAP_SHARED, fbfd, 0);

    // 在这里进行绘图操作...

    munmap(fbp, screensize);
    close(fbfd);
    return 0;
}

sudo chmod 666 /dev/fb0