/* beacon.h
 *
 * This is the header file for all the beacon related routines. In particular, determination
 * of the center beacon and the currently active beacon are done in this file and beacon.c.
 */

#ifndef BEACON_H
#define BEACON_H

#define kSampleCount			   50		 // Number of beacon samples to measure
#define kSampleRuns				   10		 // Number of times to sample the peak 
#define kMinStrength			   150		 // Range for center fixation

// These correspond to the inputs on port E of the MicroCore:
// change carefully!
typedef enum {
	kCenterBeacon = 0, 	   // Port E0
	kRightBeacon, 		   // Port E1
	kLeftBeacon,		   // Port E2
	kNumBeacons
} BeaconCode;

// Position of the center relative to current position
typedef enum {
	kOrientationCentered,
	kOrientationSkewed,
	kOrientationUnknown
} Orientation;

// Exported routines
void CollectPeakValues(unsigned int beaconSamples[], unsigned int numBeacons);
BeaconCode FindActiveBeacon(BeaconCode lastBeacon);
Orientation FindCenter(void);

#endif // BEACON_H