diff options
Diffstat (limited to 'FreeRTOS/Source/portable/RVDS/ARM_CM3/port.c')
| -rw-r--r-- | FreeRTOS/Source/portable/RVDS/ARM_CM3/port.c | 22 |
1 files changed, 11 insertions, 11 deletions
diff --git a/FreeRTOS/Source/portable/RVDS/ARM_CM3/port.c b/FreeRTOS/Source/portable/RVDS/ARM_CM3/port.c index 76dcb5727..6e4e77f97 100644 --- a/FreeRTOS/Source/portable/RVDS/ARM_CM3/port.c +++ b/FreeRTOS/Source/portable/RVDS/ARM_CM3/port.c @@ -51,11 +51,11 @@ #define portNVIC_SYSTICK_CLK_BIT ( 0 )
#endif
-/* 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
-vPortSetupTimerInterrupt(). Ensure configOVERRIDE_DEFAULT_TICK_CONFIGURATION
-is defined. */
+/* Legacy macro for backward compatibility only. This macro used to be used to
+replace the function that configures the clock used to generate the tick
+interrupt (prvSetupTimerInterrupt()), but now the function is declared weak so
+the application writer can override it by simply defining a function of the
+same name (vApplicationSetupTickInterrupt()). */
#ifndef configOVERRIDE_DEFAULT_TICK_CONFIGURATION
#define configOVERRIDE_DEFAULT_TICK_CONFIGURATION 0
#endif
@@ -523,13 +523,13 @@ void xPortSysTickHandler( void ) __disable_irq();
__dsb( portSY_FULL_READ_WRITE );
__isb( portSY_FULL_READ_WRITE );
-
- /* 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 );
|