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/*============================================================================
														  Motorola 68HC11

 This is a simple program to show serial port and timer polling..

 	Author:		Dusty Nidey, Axiom Mfg.
	Date:		11\22\1996
	Tools:   	ImageCraft C Compiler V3.5

==============================================================================*/


#include <hc11.h>

// Constants, not used in this example
const unsigned char SSTRING[] = "Simple String Data";
const unsigned char ANDMASK[] = {0xFB,0xF7,0xEF,0xDF};

// Function Prototypes

char	FlashOnOff;		// 1 = flash on time, 0 = flash off time
char	Ibuf[18];		// serial input buffer
char	count;
char	count4;
char	Rcount;
char	Ibyte;


// this function only used for debugging in buffalo monitor
// it is handy to set a breakpoint here, and just call this in your program,
// this way the breakpoint always stays the same

void break_here(){
	count=count;
}
// Toggle flashing pins for example
Handle_Timer(){
	FlashOnOff ^= 0x01;	// toggle flash state, example
}

// After executing STARTUP code on reset, execution begins here
main(){

	TFLG2 |= 0x80;	// clear timer overflow flag
	DDRD |= 0x3C;	// set PD2-PD5 to output

	// setup serial port
	BAUD = 0x30;			// 9600 baud, N,8,1
	SCCR1 = 0;
	SCCR2 = 0x0C;
	Rcount=0;

	// main loop .. endless
	for( ; ;){
		if(SCSR & 0x20){	// if incomming serial data
	        Ibyte = SCDR;			// get input byte
	        Ibuf[Rcount] = Ibyte;	// save it
			if(Rcount > 18){	// if overflow
				Rcount=0;		// reset count, ignore this string
			}
			else	++Rcount;	// else, incriment serial count

			SCDR = '.';	// example of sending something to serial port
			SCDR = Ibyte;

			/* NOTE:  you can also use the puts and putchar commands as follows
			puts("hello");			  // send string
			putchar(0x0D);			  // send CR

			*/
		}

		if(TFLG2 & 0x80){	// if timer overflow
			TFLG2 |= 0x80;		// clear timer overflow flag
			if(++count4 > 31){	// if time to flash
				count4=0;
				Handle_Timer();	// flash output pins in flash mode
			}
		}

	}
}