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150 lines
6.7 KiB
C
150 lines
6.7 KiB
C
/*
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FreeRTOS V7.4.2 - Copyright (C) 2013 Real Time Engineers Ltd.
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FEATURES AND PORTS ARE ADDED TO FREERTOS ALL THE TIME. PLEASE VISIT
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http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.
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***************************************************************************
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* *
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* FreeRTOS tutorial books are available in pdf and paperback. *
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* Complete, revised, and edited pdf reference manuals are also *
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* available. *
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* *
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* Purchasing FreeRTOS documentation will not only help you, by *
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* ensuring you get running as quickly as possible and with an *
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* in-depth knowledge of how to use FreeRTOS, it will also help *
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* the FreeRTOS project to continue with its mission of providing *
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* professional grade, cross platform, de facto standard solutions *
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* for microcontrollers - completely free of charge! *
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* *
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* >>> See http://www.FreeRTOS.org/Documentation for details. <<< *
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* *
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* Thank you for using FreeRTOS, and 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 modification to the GPL is included to allow you to
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distribute a combined work that includes FreeRTOS without being obliged to
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provide the source code for proprietary components outside of the FreeRTOS
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kernel.
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FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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details. You should have received a copy of the GNU General Public License
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and the FreeRTOS license exception along with FreeRTOS; if not it can be
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viewed here: http://www.freertos.org/a00114.html and also obtained by
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writing to Real Time Engineers Ltd., contact details for whom are available
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on the FreeRTOS WEB site.
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1 tab == 4 spaces!
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***************************************************************************
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* *
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* Having a problem? Start by reading the FAQ "My application does *
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* not run, what could be wrong?" *
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* *
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* http://www.FreeRTOS.org/FAQHelp.html *
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* *
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***************************************************************************
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http://www.FreeRTOS.org - Documentation, books, training, latest versions,
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license and Real Time Engineers Ltd. contact details.
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http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
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including FreeRTOS+Trace - an indispensable productivity tool, and our new
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fully thread aware and reentrant UDP/IP stack.
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http://www.OpenRTOS.com - Real Time Engineers ltd license FreeRTOS to High
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Integrity Systems, who sell the code with commercial support,
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indemnification and middleware, under the OpenRTOS brand.
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http://www.SafeRTOS.com - High Integrity Systems also provide a safety
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engineered and independently SIL3 certified version for use in safety and
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mission critical applications that require provable dependability.
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*/
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/*
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* Utility functions required to gather run time statistics. See:
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* http://www.freertos.org/rtos-run-time-stats.html
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*
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* Note that this is a simulated port, where simulated time is a lot slower than
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* real time, therefore the run time counter values have no real meaningful
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* units.
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*
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* Also note that it is assumed this demo is going to be used for short periods
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* of time only, and therefore timer overflows are not handled.
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*/
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/* FreeRTOS includes. */
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#include <FreeRTOS.h>
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/* FreeRTOS+Trace includes. */
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#include "trcUser.h"
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/* Variables used in the creation of the run time stats time base. Run time
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stats record how much time each task spends in the Running state. */
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static long long llInitialRunTimeCounterValue = 0LL, llTicksPerHundedthMillisecond = 0LL;
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/*-----------------------------------------------------------*/
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void vConfigureTimerForRunTimeStats( void )
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{
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LARGE_INTEGER liPerformanceCounterFrequency, liInitialRunTimeValue;
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/* Initialise the variables used to create the run time stats time base.
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Run time stats record how much time each task spends in the Running
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state. */
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if( QueryPerformanceFrequency( &liPerformanceCounterFrequency ) == 0 )
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{
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llTicksPerHundedthMillisecond = 1;
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}
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else
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{
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/* How many times does the performance counter increment in 1/100th
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millisecond. */
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llTicksPerHundedthMillisecond = liPerformanceCounterFrequency.QuadPart / 100000LL;
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/* What is the performance counter value now, this will be subtracted
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from readings taken at run time. */
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QueryPerformanceCounter( &liInitialRunTimeValue );
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llInitialRunTimeCounterValue = liInitialRunTimeValue.QuadPart;
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}
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}
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/*-----------------------------------------------------------*/
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unsigned long ulGetRunTimeCounterValue( void )
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{
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LARGE_INTEGER liCurrentCount;
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unsigned long ulReturn;
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/* What is the performance counter value now? */
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QueryPerformanceCounter( &liCurrentCount );
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/* Subtract the performance counter value reading taken when the
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application started to get a count from that reference point, then
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scale to (simulated) 1/100ths of a millisecond. */
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if( llTicksPerHundedthMillisecond == 0 )
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{
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/* The trace macros are probably calling this function before the
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scheduler has been started. */
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ulReturn = 0;
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}
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else
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{
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ulReturn = ( unsigned long ) ( ( liCurrentCount.QuadPart - llInitialRunTimeCounterValue ) / llTicksPerHundedthMillisecond );
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}
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return ulReturn;
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}
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/*-----------------------------------------------------------*/
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