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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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/* Scheduler include files. */
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#include "FreeRTOS.h"
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#include "portable.h"
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/* Demo application include files. */
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#include "partest.h"
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/*-----------------------------------------------------------
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* Simple parallel port IO routines.
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*
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* This is for the demo application which uses port 2 for LED outputs.
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*-----------------------------------------------------------*/
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/* Value for the LED to be off. */
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#define partstLED_OUTPUTS ( ( unsigned char ) 0xff )
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/* P2.0 is not used as an output so there are only 7 LEDs on port 2. */
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#define partstMAX_LEDs ( 7 )
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#define partstALL_OUTPUTS_OFF ( ( unsigned char ) 0 )
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/* Maps the LED outputs used by the standard demo application files to
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convenient outputs for the EDK2329. Mainly this insures that the LED
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used by the Check task is one of the on board LEDs so the demo can be
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executed on an EDK without any modification. */
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static inline unsigned char prvMapLED( unsigned portBASE_TYPE uxLED );
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/*-----------------------------------------------------------*/
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void vParTestInitialise( void )
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{
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/* LED's are connected to port 2. P2.1 and P2.2 are built onto the EDK.
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P2.3 to P2.7 are soldered onto the expansion port. */
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P2DDR = partstLED_OUTPUTS;
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P2DR = partstALL_OUTPUTS_OFF;
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}
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/*-----------------------------------------------------------*/
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/*
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* Described at the top of the file.
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*/
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static inline unsigned char prvMapLED( unsigned portBASE_TYPE uxLED )
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{
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switch( uxLED )
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{
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case 0 : return ( unsigned char ) 2;
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case 1 : return ( unsigned char ) 3;
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case 2 : return ( unsigned char ) 4;
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case 3 : return ( unsigned char ) 5;
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case 4 : return ( unsigned char ) 6;
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case 5 : return ( unsigned char ) 0;
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case 6 : return ( unsigned char ) 1;
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default : return 0;
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}
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}
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/*-----------------------------------------------------------*/
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/*
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* Turn an LED on or off.
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*/
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void vParTestSetLED( unsigned portBASE_TYPE uxLED, signed portBASE_TYPE xValue )
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{
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unsigned char ucLED;
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if( uxLED < partstMAX_LEDs )
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{
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ucLED = prvMapLED( uxLED );
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/* Set a bit in the required LED position. LED 0 is bit 1. */
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ucLED = ( unsigned char ) 1 << ( ucLED + 1 );
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if( xValue )
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{
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portENTER_CRITICAL();
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P2DR |= ucLED;
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portEXIT_CRITICAL();
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}
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else
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{
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portENTER_CRITICAL();
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P2DR &= ~ucLED;
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portEXIT_CRITICAL();
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}
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}
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}
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/*-----------------------------------------------------------*/
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void vParTestToggleLED( unsigned portBASE_TYPE uxLED )
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{
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unsigned char ucLED;
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if( uxLED < partstMAX_LEDs )
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{
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ucLED = prvMapLED( uxLED );
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/* Set a bit in the required LED position. LED 0 is bit 1. */
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ucLED = ( unsigned char ) 1 << ( ucLED + 1 );
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portENTER_CRITICAL();
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{
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if( P2DR & ucLED )
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{
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P2DR &= ~ucLED;
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}
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else
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{
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P2DR |= ucLED;
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}
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}
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portEXIT_CRITICAL();
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}
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}
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