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/*

    FreeRTOS V6.1.1 - Copyright (C) 2011 Real Time Engineers Ltd.

    ***************************************************************************

    *                                                                         *

    * If you are:                                                             *

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    *    + New to FreeRTOS,                                                   *

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    *        "Using the FreeRTOS Real Time Kernel - a Practical Guide"        *

    *                  http://www.FreeRTOS.org/Documentation                  *

    *                                                                         *

    * A pdf reference manual is also available.  Both are usually delivered   *

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    ***************************************************************************

    This file is part of the FreeRTOS distribution.

    FreeRTOS 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.

    ***NOTE*** The exception to the GPL is included to allow you to distribute

    a combined work that includes FreeRTOS without being obliged to provide the

    source code for proprietary components outside of the FreeRTOS kernel.

    FreeRTOS 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 and the FreeRTOS license exception along with FreeRTOS; if not it

    can be viewed here: http://www.freertos.org/a00114.html and also obtained

    by writing to Richard Barry, contact details for whom are available on the

    FreeRTOS WEB site.

    1 tab == 4 spaces!

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

    contact details.

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

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*/

/*

 * 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

}