blank.c File Reference

#include "config.h"
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include "delta.h"

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Functions
int	main (int argc, char *argv[])

---

Function Documentation

int main	(	int	argc,
		char *	argv[]
	)

Copyright (C) 2008 iRex Technologies B.V. All rights reserved.

Definition at line 70 of file blank.c.

References display_update_info::color, FBIO_DELTA_ERASE, and display_update_info::waveform.

{
    int fbdev;
    int ret;
    struct display_update_info updateinfo;
    int color = 15; // white

    fbdev = open ("/dev/fb0", O_RDWR);
    
    if (argc == 2)
    {
        color = atoi(argv[1]);
    }
   
    if (fbdev == -1) 
    {
        printf("Error opening framebuffer device. # mknod /dev/fb0 c 29 0\n");
        exit(-1);
    }

    updateinfo.waveform = 0; // full
    updateinfo.color = color;
    
    color = ((color & 0xf) << 4) + color;
    printf ("Doing FBIO_DELTA_ERASE(%d)\n", color);
        
    if ((ret=ioctl(fbdev, FBIO_DELTA_ERASE, &updateinfo))) 
    { 
        printf("Error sending FBIO_DELTA_ERASE: %x\n",ret); 
        exit(-1); 
    }

    close(fbdev);

    return 0;
}