I-Tech YMBAO100, User Manual

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40
K. HDMI Test
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HDMI display test
//Open the file for reading and writing
framebuffer_fd = open("/dev/fb2", O_RDWR);
// Get fixed screen information
ioctl(framebuffer_fd, FBIOGET_FSCREENINFO, &finfo)
// Get variable screen information
ioctl(framebuffer_fd, FBIOGET_VSCREENINFO, &vinfo)
// Figure out the size of the screen in bytes
screensize = vinfo.xres * vinfo.yres * vinfo.bits_per_pixel / 8;
// Map the device to memory
fbp = (char *)mmap(0, screensize, PROT_READ | PROT_WRITE, MAP_SHARED,
framebuffer_fd, 0);
// Figure out where in memory to put the pixel
memset(fbp, 0x00,screensize);
//draw point by fbp
long int location = 0;
location = (x+g_xoffset) * (g_bits_per_pixel/8) +
(y+g_yoffset) * g_line_length;
*(fbp + lo 0) = color_b;
*(fbp + lo 1) = color_g;
*(fbp + lo 2) = color_r;
//close framebuffer fd
close(framebuffer_fd);
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HDMI audio test
#enable hdmi audio
echo 0 > /sys/class/graphics/fb2/blank
#play wav file by hdmi audio
aplay /home/root/testscript/hdmi/1K.wav -D plughw:0,0