Replace the static prvSetupTimerInterrupt() function in the Cortex-M port layers...

[freertos] / FreeRTOS / Source / portable / RVDS / ARM_CM3 / port.c

diff --git a/FreeRTOS/Source/portable/RVDS/ARM_CM3/port.c b/FreeRTOS/Source/portable/RVDS/ARM_CM3/port.c
index 76dcb57272bc1b09f89cfb0ecff435670039535f..6e4e77f977cd3e8f7b5000e15a7e49927018c7ac 100644 (file)
--- 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 )\r
 #endif\r
 \r
-/* The __weak attribute does not work as you might expect with the Keil tools\r
-so the configOVERRIDE_DEFAULT_TICK_CONFIGURATION constant must be set to 1 if\r
-the application writer wants to provide their own implementation of\r
-vPortSetupTimerInterrupt().  Ensure configOVERRIDE_DEFAULT_TICK_CONFIGURATION\r
-is defined. */\r
+/* Legacy macro for backward compatibility only.  This macro used to be used to\r
+replace the function that configures the clock used to generate the tick\r
+interrupt (prvSetupTimerInterrupt()), but now the function is declared weak so\r
+the application writer can override it by simply defining a function of the\r
+same name (vApplicationSetupTickInterrupt()). */\r
 #ifndef configOVERRIDE_DEFAULT_TICK_CONFIGURATION\r
        #define configOVERRIDE_DEFAULT_TICK_CONFIGURATION 0\r
 #endif\r
@@ -523,13 +523,13 @@ void xPortSysTickHandler( void )
                        __disable_irq();\r
                        __dsb( portSY_FULL_READ_WRITE );\r
                        __isb( portSY_FULL_READ_WRITE );\r
-                       \r
-                       /* Disable the SysTick clock without reading the \r
+\r
+                       /* Disable the SysTick clock without reading the\r
                        portNVIC_SYSTICK_CTRL_REG register to ensure the\r
-                       portNVIC_SYSTICK_COUNT_FLAG_BIT is not cleared if it is set.  Again, \r
-                       the time the SysTick is stopped for is accounted for as best it can \r
-                       be, but using the tickless mode will inevitably result in some tiny \r
-                       drift of the time maintained by the kernel with respect to calendar \r
+                       portNVIC_SYSTICK_COUNT_FLAG_BIT is not cleared if it is set.  Again,\r
+                       the time the SysTick is stopped for is accounted for as best it can\r
+                       be, but using the tickless mode will inevitably result in some tiny\r
+                       drift of the time maintained by the kernel with respect to calendar\r
                        time*/\r
                        portNVIC_SYSTICK_CTRL_REG = ( portNVIC_SYSTICK_CLK_BIT | portNVIC_SYSTICK_INT_BIT );\r
 \r