#include "stdio.h"

#define NBLOCS 32
#define THRESHOLD 200

int main()
{
char		buf_in[128*128];
char		buf_out[128*128];
int		i;
int		base = 0;

while(base < 5*NBLOCS)
{

	tty_printf("\n *** image %d *** at date = %d \n", base/NBLOCS, proctime());

/* Phase 1 : lecture image sur le disque et transfert vers buf_in */
	if( ioc_read(base, buf_in, NBLOCS) )
        {
		tty_printf("echec io_read\n");
                exit();
	}
	else
	{
		ioc_completed();
		tty_printf("io_read  completed at date = %d \n",proctime());
	}

/* Phase 2 : transfert de buf_in vers buf_out avec seuillage */
	for(i=0 ; i<128*128 ; i++) 
	{
		if( buf_in[i] > THRESHOLD ) 	buf_out[i] = 255;
		else				buf_out[i] = buf_in[i];
	}
	tty_printf("image processing completed at date = %d \n",proctime());

/* Phase 3 : transfert de buf_out vers le frame buffer par dma */
	if( fb_sync_write(0,buf_out,128*128) )
	{
		tty_printf("echec fb_write\n");
		exit();
	}
	else
	{
		tty_printf("transfer completed at date = %d \n",proctime());
	}

	base = base + NBLOCS;
} // end while

exit();

return 0;

} // end main