关闭2440 屏幕背光-EDA365

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关闭2440 屏幕背光

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//backlight.c

***************************************************************************

#include
#include
#include
#include
#include
#include

int main(int argc, char** argv)
{
   if ( argc == 1 )
         {
   printf("Useage:backlight onn");
   printf("       backlight offn");
         return 1;

}

   int fb = open("/dev/fb0", O_RDWR);
   if( fb < 0 )
       {
  printf("Cann't open /dev/fb0n");
  return 1;
       }

if( strcmp( argv[1], "on" ) == 0 )
     ioctl(fb, FBIOBLANK, 0 );
   else if( strcmp( argv[1], "off" ) == 0 )
   ioctl(fb, FBIOBLANK, 1 );
else
{
   printf("Useage Error ......n");
   printf("Useage:backlight onn");
   printf("       backlight offn");
}

close(fb);

return 0;

}

***************************************************************************

Makefile

***************************************************************************

all:
arm-linux-gcc -g backlight.c -ljpeg -o backlight
clean:
rm -f backlight

***************************************************************************

关键字：2440 屏幕背光

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