2 FreeRTOS V7.4.2 - Copyright (C) 2013 Real Time Engineers Ltd.
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4 FEATURES AND PORTS ARE ADDED TO FREERTOS ALL THE TIME. PLEASE VISIT
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5 http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.
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7 ***************************************************************************
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9 * FreeRTOS tutorial books are available in pdf and paperback. *
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10 * Complete, revised, and edited pdf reference manuals are also *
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13 * Purchasing FreeRTOS documentation will not only help you, by *
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14 * ensuring you get running as quickly as possible and with an *
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15 * in-depth knowledge of how to use FreeRTOS, it will also help *
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16 * the FreeRTOS project to continue with its mission of providing *
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17 * professional grade, cross platform, de facto standard solutions *
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18 * for microcontrollers - completely free of charge! *
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20 * >>> See http://www.FreeRTOS.org/Documentation for details. <<< *
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22 * Thank you for using FreeRTOS, and thank you for your support! *
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24 ***************************************************************************
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27 This file is part of the FreeRTOS distribution.
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29 FreeRTOS is free software; you can redistribute it and/or modify it under
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30 the terms of the GNU General Public License (version 2) as published by the
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31 Free Software Foundation AND MODIFIED BY the FreeRTOS exception.
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33 >>>>>>NOTE<<<<<< The modification to the GPL is included to allow you to
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34 distribute a combined work that includes FreeRTOS without being obliged to
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35 provide the source code for proprietary components outside of the FreeRTOS
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38 FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY
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39 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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40 FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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41 details. You should have received a copy of the GNU General Public License
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42 and the FreeRTOS license exception along with FreeRTOS; if not it can be
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43 viewed here: http://www.freertos.org/a00114.html and also obtained by
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44 writing to Real Time Engineers Ltd., contact details for whom are available
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45 on the FreeRTOS WEB site.
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49 ***************************************************************************
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51 * Having a problem? Start by reading the FAQ "My application does *
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52 * not run, what could be wrong?" *
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54 * http://www.FreeRTOS.org/FAQHelp.html *
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56 ***************************************************************************
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59 http://www.FreeRTOS.org - Documentation, books, training, latest versions,
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60 license and Real Time Engineers Ltd. contact details.
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62 http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
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63 including FreeRTOS+Trace - an indispensable productivity tool, and our new
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64 fully thread aware and reentrant UDP/IP stack.
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66 http://www.OpenRTOS.com - Real Time Engineers ltd license FreeRTOS to High
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67 Integrity Systems, who sell the code with commercial support,
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68 indemnification and middleware, under the OpenRTOS brand.
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70 http://www.SafeRTOS.com - High Integrity Systems also provide a safety
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71 engineered and independently SIL3 certified version for use in safety and
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72 mission critical applications that require provable dependability.
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76 * Utility functions required to gather run time statistics. See:
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77 * http://www.freertos.org/rtos-run-time-stats.html
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79 * Note that this is a simulated port, where simulated time is a lot slower than
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80 * real time, therefore the run time counter values have no real meaningful
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83 * Also note that it is assumed this demo is going to be used for short periods
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84 * of time only, and therefore timer overflows are not handled.
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87 /* FreeRTOS includes. */
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88 #include <FreeRTOS.h>
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90 /* FreeRTOS+Trace includes. */
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91 #include "trcUser.h"
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93 /* Variables used in the creation of the run time stats time base. Run time
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94 stats record how much time each task spends in the Running state. */
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95 static long long llInitialRunTimeCounterValue = 0LL, llTicksPerHundedthMillisecond = 0LL;
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97 /*-----------------------------------------------------------*/
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99 void vConfigureTimerForRunTimeStats( void )
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101 LARGE_INTEGER liPerformanceCounterFrequency, liInitialRunTimeValue;
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103 /* Initialise the variables used to create the run time stats time base.
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104 Run time stats record how much time each task spends in the Running
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107 if( QueryPerformanceFrequency( &liPerformanceCounterFrequency ) == 0 )
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109 llTicksPerHundedthMillisecond = 1;
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113 /* How many times does the performance counter increment in 1/100th
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115 llTicksPerHundedthMillisecond = liPerformanceCounterFrequency.QuadPart / 100000LL;
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117 /* What is the performance counter value now, this will be subtracted
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118 from readings taken at run time. */
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119 QueryPerformanceCounter( &liInitialRunTimeValue );
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120 llInitialRunTimeCounterValue = liInitialRunTimeValue.QuadPart;
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123 /*-----------------------------------------------------------*/
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125 unsigned long ulGetRunTimeCounterValue( void )
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127 LARGE_INTEGER liCurrentCount;
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128 unsigned long ulReturn;
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130 /* What is the performance counter value now? */
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131 QueryPerformanceCounter( &liCurrentCount );
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133 /* Subtract the performance counter value reading taken when the
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134 application started to get a count from that reference point, then
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135 scale to (simulated) 1/100ths of a millisecond. */
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136 if( llTicksPerHundedthMillisecond == 0 )
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138 /* The trace macros can call this function before the kernel has been
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139 started, in which case llTicksPerHundedthMillisecond will not have been
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145 ulReturn = ( unsigned long ) ( ( liCurrentCount.QuadPart - llInitialRunTimeCounterValue ) / llTicksPerHundedthMillisecond );
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150 /*-----------------------------------------------------------*/
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projects / freertos / blob