// -*- tab-width: 4 -*-
// Serial Bitbang Example for HOODMICRO
//
// Copyright (c) 2005, K9spud LLC.
// http://www.k9spud.com/hoodmicro/
//
// Compile from command line:
// picl -12F629 -Zg bitbang.c putch.as
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

#include <stdio.h>
#include <pic.h>

__CONFIG(INTIO & WDTDIS & PWRTEN);

#define bitset(var, bit) ((var) |= 1 << (bit))
#define bitclr(var, bit) ((var) &= ~(1 << (bit)))

#define RX_PIN  0
#define TX_PIN  2
#define LED_PIN 4

extern void putch(char c);

void main(void)
{
	unsigned int i;
	unsigned char j = 0;
	
	INTCON = 0; // disable interrupts
	 
	// configure all pins as inputs, except the LED_PIN and TX_PIN
	TRISIO = ~((1<<LED_PIN) | (1<<TX_PIN)); 
    OSCCAL = _READ_OSCCAL_DATA(); // restore oscillator calibration

	bitset(GPIO, LED_PIN);
	printf("\x0cHOODMICRO Serial Bitbang Example");
	printf("\n\rCopyright (c) 2005, K9spud LLC");
	
	for(;;)
	{
		bitclr(GPIO, LED_PIN); // turn the LED off
		for(i = 0; i < 10000; ++i)
		{
			// do nothing, busy wait loop
		}
		
		bitset(GPIO, LED_PIN); // turn the LED on
		for(i = 0; i < 10000; ++i)
		{
			// do nothing, busy wait loop
		}
		
		printf("\n\r%d", ++j);
	}
}