const.h

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/*****************************************************************************
 
  const.h -- Constants for the dashboard controller.
 
  Original Author: Ali Dasdan, Synopsys, Inc.
 
 *****************************************************************************/
 
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#ifndef CONST_H
#define CONST_H
 
const int MAX_SPEED = 130; // Car speed in km/h.
const int MAX_ANGLE = 270; // Needle angle in the speedometer in degrees.
 
const double DIST_BETWEEN_TWO_PULSES = 0.00066 / 2; // 1/2 of a tire in km.
const double DIST_INCR               = 0.01; // One distance increment in km.
 
// Two pulses are needed to compute speed.
const int NUM_PULSES_FOR_SPEED     = 2;   
 
// DIST_INCR / DIST_BETWEEN_TWO_PULSES
const int NUM_PULSES_FOR_DIST_INCR = 61;  
 
const int SLOW_CLOCK_PERIOD0    = 10000;    // in 10 x milliseconds.
const int FAST_CLOCK_PERIOD1    = 50;       // in 10 x milliseconds.
const int ONE_HOUR              = 36000000; // in 10 x milliseconds.
const int PERIODS_PER_HOUR      = ONE_HOUR / FAST_CLOCK_PERIOD1;
 
#define AWAIT(N) \
  for (register int i = 0; i < N; ++i)  \
    wait();
 
#endif