Texas Instruments Tiva TM4C123GH6PM, User Manual

Page: 229 / 352

System Tick (SysTick)
20.2.1.4 ROM_SysTickIntEnable
Enables the SysTick interrupt.
Prototype:
void
ROM_SysTickIntEnable(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_SysTickIntEnable
is a function pointer located at
ROM_SYSTICKTABLE[3]
.
Description:
This function will enable the SysTick interrupt, allowing it to be reflected to the processor.
Note:
The SysTick interrupt handler does not need to clear the SysTick interrupt source as this is
done automatically by NVIC when the interrupt handler is called.
Returns:
None.
20.2.1.5 ROM_SysTickPeriodGet
Gets the period of the SysTick counter.
Prototype:
uint32_t
ROM_SysTickPeriodGet(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_SysTickPeriodGet
is a function pointer located at
ROM_SYSTICKTABLE[6]
.
Description:
This function returns the rate at which the SysTick counter wraps; this equates to the number
of processor clocks between interrupts.
Returns:
Returns the period of the SysTick counter.
20.2.1.6 ROM_SysTickPeriodSet
Sets the period of the SysTick counter.
Prototype:
void
ROM_SysTickPeriodSet(uint32_t ui32Period)
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