/************************************************************************
* Term:   Fall 2003
* Course: ECE 473
* Name:	  Olamide Adabonyan
* E-mail: o_mide@yahoo.com
*
* REVISION HISTORY
*
* First Draft: 9/24-26/02
*   		   -while loops not working correctly because inchar()
*					functionstops program
*			 date: 9/27/02
*				   -function to check input buffer coded and running
*				   -PROGRAM COMPLETE...
*
* Date Submitted: 	9/30/02
* Demo Approval: 	________
************************************************************************/

#include <hc11.h>

#define endProg() asm("swi")
#define iteration_max 300	//max # of iterations

char InChar(void);
void iteration(void);

main()
{
 	char input=0, temp;
	printf("Toggling PA4... Press any key to continue\n");

	//RDRF set by default, so it must be cleared [chk pink book 4 instructions]
	temp = SCSR;
	temp = SCDR;
	
	while (input == 0)
	{
		PORTA = PORTA^0x10;
		input = InChar();
	}

	iteration();

	printf("\nProgram Complete...");
	printf("\n\nOlamide Adabonyan");
	printf("\n[ECE 473] | [lab #1-b] | [Sept 30, 2002]");
	endProg();
}


void iteration(void)
{
 	char input2 = 0;
	unsigned short iteration_num=1;
	
	while((iteration_num < (iteration_max + 1)) && (input2 == 0))
	{
		PORTA ^= 0x10;
		printf("\nIteration Number: %d", iteration_num);
		++iteration_num;
		input2 = InChar();
	}
}


char InChar(void)
{
 	char temp;
 	
	if((SCSR & 0x20))
	 temp = SCDR;
	else
	 temp = 0;
					
	return(temp);
}