#ifndef  MAIN_H
#define  MAIN_H



// global variables, see software design document for further descriptions
extern bit Tilt;					// is the device in a tilt state?
extern short xdata Heading;			// current heading
extern bit Redraw;					// does the screen need to be redrawn?
extern short xdata CurrentScreen;	// currently displayed screen
extern short xdata Loop;			// loop through timer 0 a few times to slow it down

struct ContactType
{
	char id;
	int bearing;

};

extern xdata struct ContactType Contact[10];


// see main.c or software design document for function descriptions
void initialize(void);
void main(void);
void Initialize8051(void);
void InitializeInterrupts(void);
unsigned char Write_Read_Spi_Byte(unsigned char byte);
void DSPHandler(void) interrupt 2;
void TimerZeroHandler(void) interrupt 1 using 1;
void ButtonHandler (void) interrupt 0 using 2;

void delay(unsigned int delay_ticks);
void DEBUG(char *msg);



#endif