#include "stdio.h"

#define NBLOCS 32
#define THRESHOLD 200

int main()
{
	char		buf_in[128*128];
	char		buf_out[128*128];
	int		x;
	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 */
	x = ioc_read(base, buf_in, NBLOCS);
	if(x) 	{
		tty_printf("echec ioc_read = %d\n", x);
		}
	else 	
		{
		ioc_completed();
		tty_printf("ioc_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 */
	x = fb_write(0,buf_out,128*128); 
	if(x)  	{
		tty_printf("echec fb_write = %d\n", x);
		}
	else	{
		fb_completed();
		tty_printf("transfer completed at date = %d \n",proctime());
		}

	base = base + NBLOCS;
	} // end while
	exit();

} // end main