/*
	FreeRTOS.org V5.2.0 - Copyright (C) 2003-2009 Richard Barry.

	This file is part of the FreeRTOS.org distribution.

	FreeRTOS.org is free software; you can redistribute it and/or modify it 
	under the terms of the GNU General Public License (version 2) as published
	by the Free Software Foundation and modified by the FreeRTOS exception.

	FreeRTOS.org 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 FreeRTOS.org; if not, write to the Free Software Foundation, Inc., 59 
	Temple Place, Suite 330, Boston, MA  02111-1307  USA.

	A special exception to the GPL is included to allow you to distribute a 
	combined work that includes FreeRTOS.org without being obliged to provide
	the source code for any proprietary components.  See the licensing section
	of http://www.FreeRTOS.org for full details.


	***************************************************************************
	*                                                                         *
	* Get the FreeRTOS eBook!  See http://www.FreeRTOS.org/Documentation      *
	*                                                                         *
	* This is a concise, step by step, 'hands on' guide that describes both   *
	* general multitasking concepts and FreeRTOS specifics. It presents and   *
	* explains numerous examples that are written using the FreeRTOS API.     *
	* Full source code for all the examples is provided in an accompanying    *
	* .zip file.                                                              *
	*                                                                         *
	***************************************************************************

	1 tab == 4 spaces!

	Please ensure to read the configuration and relevant port sections of the
	online documentation.

	http://www.FreeRTOS.org - Documentation, latest information, license and
	contact details.

	http://www.SafeRTOS.com - A version that is certified for use in safety
	critical systems.

	http://www.OpenRTOS.com - Commercial support, development, porting,
	licensing and training services.
*/


/*
 * startup.c
 * Author Jefferson L Smith, Robotronics Inc.
 *
 * __premain() is the startup code to init hardware and ram to execute the
 *             C application.
 *
 */

#include <sys/ports.h>
#include "cpu.h"

void ATTR_NEAR __premain (void);

void
__premain (void)
{
	// in case special mode enabled, avoid conflict on PORTE
	PEAR |= NECLK;
	// bgnd mode stops COP and RTI clocks
	COPCTL = RSBCK;
	// stops TCNT counter when debugging stops
	TSCR1 |= (1<<5);			// TFRZ
	
	// PLL
	CLKSEL = 0;				// disable PLL to configure
	// xtal 16MHz, bus 24MHz
	SYNR  = 3 - 1;
	REFDV = 2 - 1;
	while (!(CRGFLG & 0x08))    // wait for PLL LOCK
	cop_optional_reset();
	CLKSEL |= 0x80;             // use PLL

	// init switch inputs
	PERH = 0xff;				// pullups

	// outputs
#if PORT_LED==M6811_PORTB		//PORTB
	DDRB = 0xff;	// init LED
#elif PORT_LED==M6811_PORTA		//PORTA
	DDRA = 0xff;
#elif PORT_LED==M6811_PTT	//PTT
	DDRT = 0xff;
#elif PORT_LED==M6811_PTM	//PTM
	DDRM = 0xff;
#elif PORT_LED==M6811_PTP	//PTP
	DDRP = 0xff;
#elif PORT_LED==M6811_PTH	//PTH
	DDRH = 0xff;
#endif
	
}