/* | |
FreeRTOS V7.4.2 - 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; | |
} | |
/*-----------------------------------------------------------*/ | |