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/*
FreeRTOS V8.1.0 - Copyright (C) 2014 Real Time Engineers Ltd.
All rights reserved
VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.
***************************************************************************
* *
* FreeRTOS provides completely free yet professionally developed, *
* robust, strictly quality controlled, supported, and cross *
* platform software that has become a de facto standard. *
* *
* Help yourself get started quickly and support the FreeRTOS *
* project by purchasing a FreeRTOS tutorial book, reference *
* manual, or both from: http://www.FreeRTOS.org/Documentation *
* *
* Thank you! *
* *
***************************************************************************
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 modification 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. Full license text is available from the following
link: http://www.freertos.org/a00114.html
1 tab == 4 spaces!
***************************************************************************
* *
* Having a problem? Start by reading the FAQ "My application does *
* not run, what could be wrong?" *
* *
* http://www.FreeRTOS.org/FAQHelp.html *
* *
***************************************************************************
http://www.FreeRTOS.org - Documentation, books, training, latest versions,
license and Real Time Engineers Ltd. contact details.
http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
including FreeRTOS+Trace - an indispensable productivity tool, a DOS
compatible FAT file system, and our tiny thread aware UDP/IP stack.
http://www.OpenRTOS.com - Real Time Engineers ltd license FreeRTOS to High
Integrity Systems to sell under the OpenRTOS brand. Low cost OpenRTOS
licenses offer ticketed support, indemnification and middleware.
http://www.SafeRTOS.com - High Integrity Systems also provide a safety
engineered and independently SIL3 certified version for use in safety and
mission critical applications that require provable dependability.
1 tab == 4 spaces!
*/
/*
* 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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