#include <16f84a.h>

#fuses HS,NOWDT
#use delay(CLOCK=20000000)

#undef PERFORMANCE_CHECK

//total 202752 bytes
#define XX	192
#define YY	72

struct{
	short bit0;
	short bit1;
	short bit2;
	short bit3;
	short bit4;
	short bit5;
	short bit6;
	short bit7;
} PORTB;

#byte PORTB = 6

typedef struct tagBITDATA{
	short bit0;
	short bit1;
	short bit2;
	short bit3;
	short bit4;
	short bit5;
	short bit6;
	short bit7;
} BITDATA;

#define READ_BIT(x)      PORTB.bit6=0;(x)|=PORTB.bit7;PORTB.bit6=1;
#define READ_BIT_DIRECT(x) PORTB.bit6=0;(x)=PORTB.bit7;PORTB.bit6=1;

void main(void)
{
	unsigned char x;
	unsigned char y;
	unsigned long data;
	BITDATA  bitdata;

	set_tris_b(0x80);

#use rs232(BAUD=115200, XMIT=PIN_B2, RCV=PIN_B1)

	while(1){
#ifndef PERFORMANCE_CHECK
		while(kbhit() == 1){
		}
		getc();
#endif
		data = 0x0000;
		while(data != 0xaa55){
			data <<= 1;
			READ_BIT(data);
		}

		for(x = 0; x < 224; x++){ //28byte
			PORTB.bit6 = 0;
			PORTB.bit6 = 1;
		}

		data = 0x0000;
		for(x = 0; x < 16; x++){
			data <<= 1;
			READ_BIT(data);
		}

		if(data != 0xaa55){
			continue;
		}
#ifdef PERFORMANCE_CHECK
		else{
			putc('S');
		}
#endif
		PORTB.bit5 = 1;	//LED ON

		for(x = 0; x < XX; x++){
			for(y = 0; y < YY; y++){
				READ_BIT_DIRECT(bitdata.bit7);
				READ_BIT_DIRECT(bitdata.bit6);
				READ_BIT_DIRECT(bitdata.bit5);
				READ_BIT_DIRECT(bitdata.bit4);
				READ_BIT_DIRECT(bitdata.bit3);
				READ_BIT_DIRECT(bitdata.bit2);
				READ_BIT_DIRECT(bitdata.bit1);
				READ_BIT_DIRECT(bitdata.bit0);
#ifndef PERFORMANCE_CHECK
				putc((unsigned char)bitdata);
#endif
			}
		}
		PORTB.bit5 = 0;	//LED OFF
#ifdef PERFORMANCE_CHECK
		putc('E');
#endif
	}
}