@ -1,7 +1,7 @@
/*
FreeRTOS V7 .3 .0 - Copyright ( C ) 2012 Real Time Engineers Ltd .
FEATURES AND PORTS ARE ADDED TO FREERTOS ALL THE TIME . PLEASE VISIT
FEATURES AND PORTS ARE ADDED TO FREERTOS ALL THE TIME . PLEASE VISIT
http : //www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
@ -42,7 +42,7 @@
FreeRTOS WEB site .
1 tab = = 4 spaces !
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* *
* Having a problem ? Start by reading the FAQ " My application does *
@ -52,17 +52,17 @@
* *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
http : //www.FreeRTOS.org - Documentation, training, latest versions, license
and contact details .
http : //www.FreeRTOS.org - Documentation, training, latest versions, license
and contact details .
http : //www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
including FreeRTOS + Trace - an indispensable productivity tool .
Real Time Engineers ltd license FreeRTOS to High Integrity Systems , who sell
the code with commercial support , indemnification , and middleware , under
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.OpenRTOS.com. High Integrity Systems also
provide a safety engineered and independently SIL3 certified version under
provide a safety engineered and independently SIL3 certified version under
the SafeRTOS brand : http : //www.SafeRTOS.com.
*/
@ -88,7 +88,7 @@
/* The __weak attribute does not work as you might expect with the Keil tools
so the configOVERRIDE_DEFAULT_TICK_CONFIGURATION constant must be set to 1 if
the application writer wants to provide their own implementation of
the application writer wants to provide their own implementation of
vPortSetupTimerInterrupt ( ) . Ensure configOVERRIDE_DEFAULT_TICK_CONFIGURATION
is defined . */
# ifndef configOVERRIDE_DEFAULT_TICK_CONFIGURATION
@ -122,7 +122,7 @@ static unsigned portBASE_TYPE uxCriticalNesting = 0xaaaaaaaa;
/*
* Setup the timer to generate the tick interrupts . The implementation in this
* file is weak to allow application writers to change the timer used to
* file is weak to allow application writers to change the timer used to
* generate the tick interrupt .
*/
void vPortSetupTimerInterrupt ( void ) ;
@ -319,7 +319,7 @@ void xPortSysTickHandler( void )
# endif
/* Only reset the systick load register if configUSE_TICKLESS_IDLE is set to
1. If it is set to 0 tickless idle is not being used . If it is set to a
1. If it is set to 0 tickless idle is not being used . If it is set to a
value other than 0 or 1 then a timer other than the SysTick is being used
to generate the tick interrupt . */
# if configUSE_TICKLESS_IDLE == 1
@ -339,6 +339,7 @@ void xPortSysTickHandler( void )
__weak void vPortSuppressTicksAndSleep ( portTickType xExpectedIdleTime )
{
unsigned long ulReloadValue , ulCompleteTickPeriods , ulCompletedSysTickIncrements ;
portTickType xModifiableIdleTime ;
/* Make sure the SysTick reload value does not overflow the counter. */
if ( xExpectedIdleTime > xMaximumPossibleSuppressedTicks )
@ -384,9 +385,14 @@ void xPortSysTickHandler( void )
/* Restart SysTick. */
portNVIC_SYSTICK_CTRL_REG = portNVIC_SYSTICK_CLK_BIT | portNVIC_SYSTICK_INT_BIT | portNVIC_SYSTICK_ENABLE_BIT ;
/* Sleep until something happens. */
configPRE_SLEEP_PROCESSING ( xExpectedIdleTime ) ;
if ( xExpectedIdleTime > 0 )
/* Sleep until something happens. configPRE_SLEEP_PROCESSING() can
set its parameter to 0 to indicate that its implementation contains
its own wait for interrupt or wait for event instruction , and so wfi
should not be executed again . However , the original expected idle
time variable must remain unmodified , so a copy is taken . */
xModifiableIdleTime = xExpectedIdleTime ;
configPRE_SLEEP_PROCESSING ( xModifiableIdleTime ) ;
if ( xModifiableIdleTime > 0 )
{
__wfi ( ) ;
}
@ -450,7 +456,7 @@ void xPortSysTickHandler( void )
void vPortSetupTimerInterrupt ( void )
{
/* Calculate the constants required to configure the tick interrupt. */
/* Calculate the constants required to configure the tick interrupt. */
# if configUSE_TICKLESS_IDLE == 1
{
ulTimerReloadValueForOneTick = ( configSYSTICK_CLOCK_HZ / configTICK_RATE_HZ ) - 1UL ;
@ -458,12 +464,12 @@ void xPortSysTickHandler( void )
ulStoppedTimerCompensation = 45UL / ( configCPU_CLOCK_HZ / configSYSTICK_CLOCK_HZ ) ;
}
# endif /* configUSE_TICKLESS_IDLE */
/* Configure SysTick to interrupt at the requested rate. */
portNVIC_SYSTICK_LOAD_REG = ( configSYSTICK_CLOCK_HZ / configTICK_RATE_HZ ) - 1UL ; ;
portNVIC_SYSTICK_CTRL_REG = portNVIC_SYSTICK_CLK_BIT | portNVIC_SYSTICK_INT_BIT | portNVIC_SYSTICK_ENABLE_BIT ;
}
# endif /* configOVERRIDE_DEFAULT_TICK_CONFIGURATION */
/*-----------------------------------------------------------*/
Richard Barry
12 years ago