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[/] [openrisc/] [trunk/] [rtos/] [freertos-6.1.1/] [Demo/] [HCS12_GCC_banked/] [startup.c] - Blame information for rev 826

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1 588 jeremybenn
/*
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    FreeRTOS V6.1.1 - Copyright (C) 2011 Real Time Engineers Ltd.
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    ***************************************************************************
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    *                                                                         *
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    * If you are:                                                             *
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    *                                                                         *
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    *    + New to FreeRTOS,                                                   *
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    *    + Wanting to learn FreeRTOS or multitasking in general quickly       *
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    *    + Looking for basic training,                                        *
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    *    + Wanting to improve your FreeRTOS skills and productivity           *
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    *                                                                         *
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    * then take a look at the FreeRTOS books - available as PDF or paperback  *
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    *                                                                         *
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    *        "Using the FreeRTOS Real Time Kernel - a Practical Guide"        *
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    *                  http://www.FreeRTOS.org/Documentation                  *
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    *                                                                         *
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    * A pdf reference manual is also available.  Both are usually delivered   *
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    * to your inbox within 20 minutes to two hours when purchased between 8am *
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    * and 8pm GMT (although please allow up to 24 hours in case of            *
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    * exceptional circumstances).  Thank you for your support!                *
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    *                                                                         *
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    ***************************************************************************
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    This file is part of the FreeRTOS distribution.
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    FreeRTOS is free software; you can redistribute it and/or modify it under
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    the terms of the GNU General Public License (version 2) as published by the
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    Free Software Foundation AND MODIFIED BY the FreeRTOS exception.
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    ***NOTE*** The exception to the GPL is included to allow you to distribute
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    a combined work that includes FreeRTOS without being obliged to provide the
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    source code for proprietary components outside of the FreeRTOS kernel.
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    FreeRTOS is distributed in the hope that it will be useful, but WITHOUT
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    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
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    more details. You should have received a copy of the GNU General Public
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    License and the FreeRTOS license exception along with FreeRTOS; if not it
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    can be viewed here: http://www.freertos.org/a00114.html and also obtained
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    by writing to Richard Barry, contact details for whom are available on the
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    FreeRTOS WEB site.
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    1 tab == 4 spaces!
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    http://www.FreeRTOS.org - Documentation, latest information, license and
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    contact details.
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    http://www.SafeRTOS.com - A version that is certified for use in safety
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    critical systems.
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    http://www.OpenRTOS.com - Commercial support, development, porting,
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    licensing and training services.
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*/
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/*
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 * startup.c
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 * Author Jefferson L Smith, Robotronics Inc.
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 *
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 * __premain() is the startup code to init hardware and ram to execute the
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 *             C application.
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 *
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 */
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#include <sys/ports.h>
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#include "cpu.h"
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void ATTR_NEAR __premain (void);
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void
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__premain (void)
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{
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        // in case special mode enabled, avoid conflict on PORTE
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        PEAR |= NECLK;
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        // bgnd mode stops COP and RTI clocks
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        COPCTL = RSBCK;
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        // stops TCNT counter when debugging stops
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        TSCR1 |= (1<<5);                        // TFRZ
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        // PLL
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        CLKSEL = 0;                              // disable PLL to configure
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        // xtal 16MHz, bus 24MHz
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        SYNR  = 3 - 1;
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        REFDV = 2 - 1;
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        while (!(CRGFLG & 0x08))    // wait for PLL LOCK
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        cop_optional_reset();
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        CLKSEL |= 0x80;             // use PLL
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        // init switch inputs
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        PERH = 0xff;                            // pullups
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        // outputs
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#if PORT_LED==M6811_PORTB               //PORTB
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        DDRB = 0xff;    // init LED
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#elif PORT_LED==M6811_PORTA             //PORTA
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        DDRA = 0xff;
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#elif PORT_LED==M6811_PTT       //PTT
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        DDRT = 0xff;
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#elif PORT_LED==M6811_PTM       //PTM
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        DDRM = 0xff;
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#elif PORT_LED==M6811_PTP       //PTP
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        DDRP = 0xff;
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#elif PORT_LED==M6811_PTH       //PTH
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        DDRH = 0xff;
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#endif
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}
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