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/*
FreeRTOS.org V5.1.2 - 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 as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
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 can be applied should you wish 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 of how and when the exception
can be applied.
***************************************************************************
***************************************************************************
* *
* 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. *
* *
***************************************************************************
***************************************************************************
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
}
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