System Tick (SysTick)
Returns:
None.
20.2.1.2 ROM_SysTickEnable
Enables the SysTick counter.
Prototype:
void
ROM_SysTickEnable(void)
ROM Location:
ROM_APITABLE is an array of pointers located at 0x0100.0010.
ROM_SYSTICKTABLE is an array of pointers located at ROM_APITABLE[10].
ROM_SysTickEnable is a function pointer located at ROM_SYSTICKTABLE[1].
Description:
This will start the SysTick counter. If an interrupt handler has been registered, it is called when
the SysTick counter rolls over.
Note:
Calling this function will cause the SysTick counter to (re)commence counting from its current
value. The counter is not automatically reloaded with the period as specified in a previous
call to ROM_SysTickPeriodSet(). If an immediate reload is required, the NVIC_ST_CURRENT
register must be written to force this. Any write to this register clears the SysTick counter to 0
and will cause a reload with the supplied period on the next clock.
Returns:
None.
20.2.1.3 ROM_SysTickIntDisable
Disables the SysTick interrupt.
Prototype:
void
ROM_SysTickIntDisable(void)
ROM Location:
ROM_APITABLE is an array of pointers located at 0x0100.0010.
ROM_SYSTICKTABLE is an array of pointers located at ROM_APITABLE[10].
ROM_SysTickIntDisable is a function pointer located at ROM_SYSTICKTABLE[4].
Description:
This function will disable the SysTick interrupt, preventing it from being reflected to the proces-
sor.
Returns:
None.
228 April 8, 2013
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