////////////////////////////////////////////////////////////////////////////
//
// Canon RC-1/RC-2 Clone.
//
// copyright by rubidesu 2016
// http://www.gatelink.co.jp/hw/
//
////////////////////////////////////////////////////////////////////////////

#include <12f683.h>

//#define _SERIAL_DEBUG_
#undef _SERIAL_DEBUG_

#fuses INTRC_IO, NOWDT, PUT, NOPROTECT, NOMCLR, NOBROWNOUT
#rom 0x7FF = {0x3400}

#use delay(clock=8000000)

#ifdef _SERIAL_DEBUG_
#use rs232(BAUD=9600, XMIT=PIN_A5)
#endif //_SERIAL_DEBUG_

typedef unsigned int1	BIT;
typedef unsigned int16	WORD;
typedef unsigned int32	DWORD;

#define HIGH 1
#define LOW  0

struct tagPORTA{
	short bit0;
	short bit1;
	short bit2;
	short bit3;
	short bit4;
	short bit5;
	short bit6;
	short bit7;
}PORTA;
#byte PORTA = 5

#define LED_PORT	PORTA.bit2
#define PUSH_SW1	PORTA.bit3
#define PUSH_SW2	PORTA.bit4

////////////////////////////////////////////////////////////////////////////
#INT_RA
void int_ra_isr(void)
{
	BYTE bDummy;

	bDummy = PORTA;	//Dummy Read(Wakeup only).
}

////////////////////////////////////////////////////////////////////////////
BIT get_sw1()
{
	BIT sw_state = LOW;

	if(PUSH_SW1 == LOW){		//DOWN
		delay_ms(10);
		if(PUSH_SW1 == LOW){
			for(;;){
				if(PUSH_SW1 == HIGH){
					break;
				}
			}
			sw_state = HIGH;
		}
	}

	return sw_state;
}

////////////////////////////////////////////////////////////////////////////
BIT get_sw2()
{
	BIT sw_state = LOW;

	if(PUSH_SW2 == LOW){		//DOWN
		delay_ms(10);
		if(PUSH_SW2 == LOW){
			for(;;){
				if(PUSH_SW2 == HIGH){
					break;
				}
			}
			sw_state = HIGH;
		}
	}

	return sw_state;
}

////////////////////////////////////////////////////////////////////////////
void SendPulse()
{
	BYTE i;

	for(i = 0; i < 16; i++){
		LED_PORT = HIGH;
		delay_us(15);
		LED_PORT = LOW;
		delay_us(11);
		#asm nop #endasm
	}
}

////////////////////////////////////////////////////////////////////////////
void SendDataInstant()
{
	SendPulse();

	delay_us(7330);

	SendPulse();
}

////////////////////////////////////////////////////////////////////////////
void SendDataDelay()
{
	SendPulse();

	delay_us(5360);

	SendPulse();
}

////////////////////////////////////////////////////////////////////////////
// ƒ�ƒCƒ“.
//
// IN:
//
// OUT:
//
// RETURN:
//
////////////////////////////////////////////////////////////////////////////
main()
{
	setup_oscillator(OSC_8MHZ);

	set_tris_a(0b00011000);
	port_a_pullups(0b00000000);		//Pullup.

	setup_comparator(NC_NC_NC_NC);	//Disable Comparator.
	setup_adc(adc_off);				//Disable AD Converter.
	setup_adc_ports(NO_ANALOGS);	//Disable AD Converter.

	output_low(PIN_A0);
	output_low(PIN_A1);
	output_low(PIN_A2);
#ifndef _SERIAL_DEBUG_
	output_low(PIN_A5);
#endif //_SERIAL_DEBUG_

	enable_interrupts(INT_RA3);
	enable_interrupts(INT_RA4);
	enable_interrupts(GLOBAL);

	while(1){
		if(get_sw1() == HIGH){
			#ifdef _SERIAL_DEBUG_
			putc('A');
			#endif //_SERIAL_DEBUG_

			delay_ms(10);
			SendDataInstant();
		}
		if(get_sw2() == HIGH){
			#ifdef _SERIAL_DEBUG_
			putc('B');
			#endif //_SERIAL_DEBUG_

			delay_ms(10);
			SendDataDelay();
		}

		#ifdef _SERIAL_DEBUG_
		putc('S');
		#endif //_SERIAL_DEBUG_

		enable_interrupts(INT_RA3);
		enable_interrupts(INT_RA4);

		sleep();
		#asm nop #endasm

		disable_interrupts(INT_RA3);
		disable_interrupts(INT_RA4);

		#ifdef _SERIAL_DEBUG_
		putc('W');
		#endif //_SERIAL_DEBUG_
	}
}