/*,-----------------------------------------------------------------------------------------.| io/port|-----------------------------------------------------------------------------------------| this file implements a very basic port io lib|| Author   : {{removed according to contest rules}}|            -> circuitcellar.com avr design contest 2006|            -> Entry #AT2616||-----------------------------------------------------------------------------------------| License:| 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., 51| Franklin St, Fifth Floor, Boston, MA 02110, USA|| http://www.gnu.de/gpl-ger.html`-----------------------------------------------------------------------------------------*/#include "port.h"//ACTIVATE DEBUG by editing this file:#include "debug.h"void port_set_portbit(unsigned char portchar, unsigned char pin, unsigned char val){	//volatile char *port;	unsigned char data;	//only allow bit0-bit7	pin = (pin-'0') & 0x07;	if (val)		data = (1<<pin);	else		data = ~(1<<pin);	//WARNING: make sure not to set/clear used IO pins !!!	switch (portchar){		case('A'):			if (val)				PORTA |= data;			else				PORTA &= data;			break;		case('C'):			if (pin != 3)				return;			if (val)				PORTC |= data;			else				PORTC &= data;			break;		case('D'):			if (pin != 7)				return;			if (val)				PORTD |= data;			else				PORTD &= data;			break;		//case('B'):	port = &PORTB; break;				default:    return;	}	return;/*	//strange, this does not work (set=1 is ok, clear does not work...)	if (val)		val = (1<<pin);	if (val){		*port |= (val);		softuart_putc('S');	}else{		(*port) = (*port) & (~(val));		softuart_putc('C');	}*/}unsigned char port_get_portbit(unsigned char portchar, unsigned char pin){	volatile char *port;	switch (portchar){		case('A'):	port = &PORTA; break;		case('B'):	port = &PORTB; break;		case('C'):	port = &PORTC; break;		case('D'):	port = &PORTD; break;		default:    return 0;	}	pin = (pin-'0') & 0x07;	if (*port & (1<<pin))		return 1;	//else 	return 0;}