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108 lines
4.2 KiB
C
108 lines
4.2 KiB
C
/*
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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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