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Add the flash_timer standard demo timers (rather than tasks). These behave as the flash tasks, but use timers in place of tasks.

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Richard Barry 13 years ago
parent 05bc21e115
commit 785621ff22
2 changed files with 191 additions and 0 deletions
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124
Demo/Common/Minimal/flash_timer.c
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/*
FreeRTOS V7.1.0 - Copyright (C) 2011 Real Time Engineers Ltd.
***************************************************************************
* *
* FreeRTOS tutorial books are available in pdf and paperback. *
* Complete, revised, and edited pdf reference manuals are also *
* available. *
* *
* Purchasing FreeRTOS documentation will not only help you, by *
* ensuring you get running as quickly as possible and with an *
* in-depth knowledge of how to use FreeRTOS, it will also help *
* the FreeRTOS project to continue with its mission of providing *
* professional grade, cross platform, de facto standard solutions *
* for microcontrollers - completely free of charge! *
* *
* >>> See http://www.FreeRTOS.org/Documentation for details. <<< *
* *
* Thank you for using FreeRTOS, and thank you for your support! *
* *
***************************************************************************
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. See the GNU General Public License for
more details. You should have received a copy of the GNU General Public
License and the FreeRTOS license exception along with FreeRTOS; if not it
can be viewed here: http://www.freertos.org/a00114.html and also obtained
by writing to Richard Barry, contact details for whom are available on the
FreeRTOS WEB site.
1 tab == 4 spaces!
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.
*/
/**
* Repeatedly toggles one or more LEDs using software timers - one timer per
* LED.
*/
/* Scheduler include files. */
#include "FreeRTOS.h"
#include "timers.h"
/* Demo program include files. */
#include "partest.h"
#include "flash_timer.h"
/* The toggle rates are all a multple of ledFLASH_RATE_BASE. */
#define ledFLASH_RATE_BASE ( ( ( portTickType ) 333 ) / portTICK_RATE_MS )
/* A block time of zero simple means "don't block". */
#define ledDONT_BLOCK ( ( portTickType ) 0 )
/*-----------------------------------------------------------*/
/*
* The callback function used by each LED flashing timer. All the timers use
* this function, and the timer ID is used within the function to determine
* which timer has actually expired.
*/
static void prvLEDTimerCallback( xTimerHandle xTimer );
/*-----------------------------------------------------------*/
void vStartLEDFlashTimers( unsigned portBASE_TYPE xNumberOfLEDs )
{
portBASE_TYPE xLEDTimer;
xTimerHandle xTimer;
/* Create and start the requested number of timers. */
for( xLEDTimer = 0; xLEDTimer < xNumberOfLEDs; ++xLEDTimer )
{
/* Create the timer. */
xTimer = xTimerCreate( "Flasher", /* A text name, purely to help debugging. */
ledFLASH_RATE_BASE * ( xLEDTimer + 1 ), /* The timer period, which is a multiple of ledFLASH_RATE_BASE. */
pdTRUE, /* This is an auto-reload timer, so xAutoReload is set to pdTRUE. */
( void * ) xLEDTimer, /* The ID is used to identify the timer within the timer callback function, as each timer uses the same callback. */
prvLEDTimerCallback /* Each timer uses the same callback. */
);
/* If the timer was created successfully, attempt to start it. If the
scheduler has not yet been started then the timer command queue must
be long enough to hold each command sent to it until such time that the
scheduler is started. The timer command queue length is set by
configTIMER_QUEUE_LENGTH in FreeRTOSConfig.h. */
if( xTimer != NULL )
{
xTimerStart( xTimer, ledDONT_BLOCK );
}
}
}
/*-----------------------------------------------------------*/
static void prvLEDTimerCallback( xTimerHandle xTimer )
{
portBASE_TYPE xTimerID;
/* The timer ID is used to identify the timer that has actually expired as
each timer uses the same callback. The ID is then also used as the number
of the LED that is to be toggled. */
xTimerID = ( portBASE_TYPE ) pvTimerGetTimerID( xTimer );
vParTestToggleLED( xTimerID );
}

67
Demo/Common/include/flash_timer.h
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/*
FreeRTOS V7.1.0 - Copyright (C) 2011 Real Time Engineers Ltd.
***************************************************************************
* *
* FreeRTOS tutorial books are available in pdf and paperback. *
* Complete, revised, and edited pdf reference manuals are also *
* available. *
* *
* Purchasing FreeRTOS documentation will not only help you, by *
* ensuring you get running as quickly as possible and with an *
* in-depth knowledge of how to use FreeRTOS, it will also help *
* the FreeRTOS project to continue with its mission of providing *
* professional grade, cross platform, de facto standard solutions *
* for microcontrollers - completely free of charge! *
* *
* >>> See http://www.FreeRTOS.org/Documentation for details. <<< *
* *
* Thank you for using FreeRTOS, and thank you for your support! *
* *
***************************************************************************
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. See the GNU General Public License for
more details. You should have received a copy of the GNU General Public
License and the FreeRTOS license exception along with FreeRTOS; if not it
can be viewed here: http://www.freertos.org/a00114.html and also obtained
by writing to Richard Barry, contact details for whom are available on the
FreeRTOS WEB site.
1 tab == 4 spaces!
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.
*/
#ifndef FLASH_TIMER_H
#define FLASH_TIMER_H
/*
* Creates the LED flashing timers. xNumberOfLEDs specifies how many timers to
* create, with each timer toggling a different LED. The first LED to be
* toggled is LED 0, with subsequent LEDs following on in numerical order. Each
* timer uses the exact same callback function, with the timer ID being used
* within the callback function to determine which timer has actually expired
* (and therefore which LED to toggle).
*/
void vStartLEDFlashTimers( unsigned portBASE_TYPE xNumberOfLEDs );
#endif FLASH_TIMER_H
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