| /* | |
| FreeRTOS V7.4.1 - Copyright (C) 2013 Real Time Engineers Ltd. | |
| FEATURES AND PORTS ARE ADDED TO FREERTOS ALL THE TIME. PLEASE VISIT | |
| http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION. | |
| *************************************************************************** | |
| * * | |
| * 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 Real Time Engineers Ltd., contact details for whom are available | |
| on the FreeRTOS WEB site. | |
| 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, and our new | |
| fully thread aware and reentrant UDP/IP stack. | |
| http://www.OpenRTOS.com - Real Time Engineers ltd license FreeRTOS to High | |
| Integrity Systems, who sell the code with commercial support, | |
| indemnification and middleware, under the OpenRTOS brand. | |
| 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. | |
| */ | |
| /* FreeRTOS includes. */ | |
| #include "FreeRTOS.h" | |
| #include "task.h" | |
| /* Utility functions to implement run time stats on Cortex-M CPUs. The collected | |
| run time data can be viewed through the CLI interface. See the following URL for | |
| more information on run time stats: | |
| http://www.freertos.org/rtos-run-time-stats.html */ | |
| /* Used in the run time stats calculations. */ | |
| static uint32_t ulClocksPer10thOfAMilliSecond = 0UL; | |
| void vMainConfigureTimerForRunTimeStats( void ) | |
| { | |
| /* How many clocks are there per tenth of a millisecond? */ | |
| ulClocksPer10thOfAMilliSecond = configCPU_CLOCK_HZ / 10000UL; | |
| } | |
| /*-----------------------------------------------------------*/ | |
| uint32_t ulMainGetRunTimeCounterValue( void ) | |
| { | |
| uint32_t ulSysTickCounts, ulTickCount, ulReturn; | |
| const uint32_t ulSysTickReloadValue = ( configCPU_CLOCK_HZ / configTICK_RATE_HZ ) - 1UL; | |
| volatile uint32_t * const pulCurrentSysTickCount = ( ( volatile uint32_t *) 0xe000e018 ); | |
| volatile uint32_t * const pulInterruptCTRLState = ( ( volatile uint32_t *) 0xe000ed04 ); | |
| const uint32_t ulSysTickPendingBit = 0x04000000UL; | |
| /* NOTE: There are potentially race conditions here. However, it is used | |
| anyway to keep the examples simple, and to avoid reliance on a separate | |
| timer peripheral. */ | |
| /* The SysTick is a down counter. How many clocks have passed since it was | |
| last reloaded? */ | |
| ulSysTickCounts = ulSysTickReloadValue - *pulCurrentSysTickCount; | |
| /* How many times has it overflowed? */ | |
| ulTickCount = xTaskGetTickCountFromISR(); | |
| /* Is there a SysTick interrupt pending? */ | |
| if( ( *pulInterruptCTRLState & ulSysTickPendingBit ) != 0UL ) | |
| { | |
| /* There is a SysTick interrupt pending, so the SysTick has overflowed | |
| but the tick count not yet incremented. */ | |
| ulTickCount++; | |
| /* Read the SysTick again, as the overflow might have occurred since | |
| it was read last. */ | |
| ulSysTickCounts = ulSysTickReloadValue - *pulCurrentSysTickCount; | |
| } | |
| /* Convert the tick count into tenths of a millisecond. THIS ASSUMES | |
| configTICK_RATE_HZ is 1000! */ | |
| ulReturn = ( ulTickCount * 10UL ) ; | |
| /* Add on the number of tenths of a millisecond that have passed since the | |
| tick count last got updated. */ | |
| ulReturn += ( ulSysTickCounts / ulClocksPer10thOfAMilliSecond ); | |
| return ulReturn; | |
| } | |
| /*-----------------------------------------------------------*/ | |