1 files changed, 12 insertions, 10 deletions

diff --git a/FreeRTOS/Source/portable/IAR/ARM_CM0/port.c b/FreeRTOS/Source/portable/IAR/ARM_CM0/port.c
index 3dd08209d..84f1e66e0 100644
--- a/FreeRTOS/Source/portable/IAR/ARM_CM0/port.c
+++ b/FreeRTOS/Source/portable/IAR/ARM_CM0/port.c
@@ -92,9 +92,11 @@ power functionality only. */
 #endif /* configUSE_TICKLESS_IDLE */

 

 /*

- * Setup the timer to generate the tick interrupts.

+ * 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

+ * generate the tick interrupt.

  */

-static void prvSetupTimerInterrupt( void );

+void vPortSetupTimerInterrupt( void );

 

 /*

  * Exception handlers.

@@ -159,7 +161,7 @@ BaseType_t xPortStartScheduler( void )
 

 	/* Start the timer that generates the tick ISR.  Interrupts are disabled

 	here already. */

-	prvSetupTimerInterrupt();

+	vPortSetupTimerInterrupt();

 

 	/* Initialise the critical nesting count ready for the first task. */

 	uxCriticalNesting = 0;

@@ -233,7 +235,7 @@ uint32_t ulPreviousMask;
  * Setup the systick timer to generate the tick interrupts at the required

  * frequency.

  */

-static void prvSetupTimerInterrupt( void )

+__weak void vPortSetupTimerInterrupt( void )

 {

 	/* Calculate the constants required to configure the tick interrupt. */

 	#if( configUSE_TICKLESS_IDLE == 1 )

@@ -243,7 +245,7 @@ static void prvSetupTimerInterrupt( void )
 		ulStoppedTimerCompensation = portMISSED_COUNTS_FACTOR;

 	}

 	#endif /* configUSE_TICKLESS_IDLE */

-        

+

 	/* Stop and reset the SysTick. */

 	portNVIC_SYSTICK_CTRL_REG = 0UL;

 	portNVIC_SYSTICK_CURRENT_VALUE_REG = 0UL;

@@ -349,12 +351,12 @@ TickType_t xModifiableIdleTime;
 		__DSB();

 		__ISB();

 

-		/* Disable the SysTick clock without reading the 

+		/* Disable the SysTick clock without reading the

 		portNVIC_SYSTICK_CTRL_REG register to ensure the

-		portNVIC_SYSTICK_COUNT_FLAG_BIT is not cleared if it is set.  Again, 

-		the time the SysTick is stopped for is accounted for as best it can 

-		be, but using the tickless mode will inevitably result in some tiny 

-		drift of the time maintained by the kernel with respect to calendar 

+		portNVIC_SYSTICK_COUNT_FLAG_BIT is not cleared if it is set.  Again,

+		the time the SysTick is stopped for is accounted for as best it can

+		be, but using the tickless mode will inevitably result in some tiny

+		drift of the time maintained by the kernel with respect to calendar

 		time*/

 		portNVIC_SYSTICK_CTRL_REG = ( portNVIC_SYSTICK_CLK_BIT | portNVIC_SYSTICK_INT_BIT );