/*  $Id: lookup.c,v 1.1 2004/03/17 04:45:54 jmuelmen Exp $ */

#include <8051.h>

#include "ezusb_reg.h"
#include "firm.h"
#include "surf_mem.h"

byte rev_lookup (signed int volt, byte chn)
{
     int i;
     byte _volt;
     if (volt - 0x0960 < 0) {
	  _volt = 0;
     }
     else _volt = ((volt - 0x0960) >> 4) & 0xff;
     for (i = 0; i < 0x0100; ++i) 
	  if (_vtable[((unsigned int)chn << 8) + i] < _volt)
	       return i;
     return 0xff;
}