/**********************************
	Nick Sitarski
	Vladi Gergov
	Lab 2
	ECE 473 W 2003
	Professor shaout
	Master
**********************************/ 

#include <HC11.h>
#include <stdio.h>
#include <VECTOR.H>

/*********************************
	EQUATES
**********************************/

#define	RTIF		0x40
#define	DELAY		30000

/**********************************
	BIT MASK
**********************************/

#define	bit0		0x01
#define	bit1		0x02
#define	bit2		0x04
#define	bit3		0x08
#define	bit4		0x10
#define	bit5		0x20
#define	bit6		0x40
#define	bit7		0x80

/**********************************
	GLOBAL VARIABLES
**********************************/

unsigned int rticount=0;		/* Global variable to count the number of times the RTI interrupt has happend */
unsigned int switchon;	/* FLAG used to know when a switch has been pressed */	
unsigned char dummy; 	/* Dummy variable to  clear the SPIF flag */

/**********************************
	PRAGMA DEFINES
**********************************/

#pragma interrupt_handler RTIhandler()
#pragma interrupt_handler TOC5handler()
#pragma interrupt_handler TIC1handler()
#pragma interrupt_handler TIC2handler()
#pragma interrupt_handler TIC3handler()

/**********************************
	FUNCTION PROTOTYPES
**********************************/

void OCoffICon( void );
void OConICoff( void );

void RTIhandler(void){
//	asm("sei");
	if((TFLG2&0x4F)!=0x40)	 /* Illegal interrupt */ 
		asm("swi");
	TFLG2=RTIF;	/* Acknowledge by clearing ( set to clear ) RTIF */
	if(rticount==30){		/* If count reaches 30 then	toggle status LED and reset count */
		rticount=0;
		PORTA^=bit6;	/* Toggle PORTD pin 1 which strobes the LED */
	}
	else
		rticount++;
//	asm("cli");
}

void TOC5handler(void){
//	asm("sei");
	printf("\nWaiting for switch debounce...");
	OCoffICon();	/* Arm IC dissarm OC5 */
	TFLG1=(bit0|bit1);	/* Clear the ICFlags */
//	asm("cli");
	}
	
void TIC1handler(void){
//	asm("sei");
	OConICoff();
	TOC5=TCNT+DELAY;
	TFLG1=bit3;
	switchon=bit1;
	printf("\nSwitch 1 Pressed");
//	asm("cli");
	}
	
void TIC2handler(void){
//	asm("sei");
	OConICoff();
	TOC5=TCNT+DELAY;
	TFLG1=bit3;
	switchon=bit2;
	printf("\nSwitch 2 Pressed");
//	asm("cli");
	}

void TIC3handler(void){
//	asm("sei");
	OConICoff();
	TOC5=TCNT+DELAY;
	TFLG1=bit3;
	switchon=bit3;
	printf("\nSwitch 3 Pressed");
//	asm("cli");
	}

void initRTI(void){	/* Initialize our RTI and enable RTI interupts to start toggleing the status LED */
	PACTL=(0xFC&TMSK2)|3|bit7;	/* Set RTI rate to 3, 32.77ms */
	TMSK2|=bit6;	/* Arm RTI */
	rticount=0;		/* Initialize global data structures */
	}

void OCoffICon(void){
	TMSK1=(bit0|bit1|bit2);	/* Sets the Input Capture ON for PORTA pins 1,2,3 */
	TFLG1=(bit0|bit1|bit2);
	TCTL2 = (bit0|bit2|bit4); /*Set IC1 and IC2 interrupts on any edge*/
	}

void OConICoff(void){
	TMSK1=bit3;	/* Sets the OC5 interupt ON */
	TFLG1=bit3;
	}
	
void initSwitch(void){
	switchon=0;
	}

void initSPCR(void){
	SPCR=0x57;
	dummy=SPSR;
	dummy=SPDR;
	}

void main ( void ) {
	asm("sei");		/* Stop interupts */
	
	initRTI();
	initSPCR();
	initSwitch();
	OCoffICon();
	
    RTIvector = &RTIhandler;
    TOC5vector = &TOC5handler;
    TIC3vector = &TIC3handler;
    TIC2vector = &TIC2handler; 
    TIC1vector = &TIC1handler;	
	
	asm("cli");		/* Start interupts */
	
	while(1){
		if(switchon!=0){
			SPDR=switchon;
		
			while((SPSR&bit7)!=0)
		       switchon=0;
		
			dummy=SPCR;
			dummy=SPDR;
		}
	}
}