JSAPI_CORTEX_CORE Class Reference

Cortex core features. More...

#include <jsapi_common.h>

Public Member Functions
void	SysTick_Timer (enum SYSTICK_GRANULARITY granularity, int priority)
	Set the granularity of the SYSTICK timer. SYSTICK timer is a simple 24-bit timer defined by ARM that is present in most Cortex-M implementations. It provides a portable method of invoking timer interrupts. More...
void	SysTick_Timer (enum SYSTICK_GRANULARITY granularity)
	See SysTick_Timer(granularity, 0), i.e. use Priority value of 0 for SysTick timer. More...
void	SysTick_TimerAddHook (void(*func)(void))
	Hook into the SYSTICK interrupt. More...
void	SysTick_SetState (bool enable)
	Enable or disable the SYSTICK timer. More...
unsigned	SysTick_CurrentValue (void)
	Return the current value of the SYSTICK timer. More...

Detailed Description

Cortex core features.

Member Function Documentation

unsigned JSAPI_CORTEX_CORE::SysTick_CurrentValue

(

void

)

Return the current value of the SYSTICK timer.

Returns

SYSTICK timer value.

void JSAPI_CORTEX_CORE::SysTick_SetState

(

bool

enable

)

Enable or disable the SYSTICK timer.

Parameters

enable

zero/false - disable SYSTICK interrupt, nonzero/true - enable SYSTICK interrupt.

void JSAPI_CORTEX_CORE::SysTick_Timer	(	enum SYSTICK_GRANULARITY	granularity,
		int	priority
	)

Set the granularity of the SYSTICK timer. SYSTICK timer is a simple 24-bit timer defined by ARM that is present in most Cortex-M implementations. It provides a portable method of invoking timer interrupts.

Parameters

granularity	one of the "enum SYSTICK_GRANULARITY" values. SYSTICK_MILLISECOND is a good value to use. Any finer granularity may interrupt the CPU too often. For example, a microsecond timer only allows ~50 instructions to execute between interrupts on a 48MHz system.
priority	priority value of the interrupt (i.e. argument to NVIC_SetPriority.

void JSAPI_CORTEX_CORE::SysTick_Timer ( enum SYSTICK_GRANULARITY  granularity )

inline

See SysTick_Timer(granularity, 0), i.e. use Priority value of 0 for SysTick timer.

Parameters

granularity

one of the "enum SYSTICK_GRANULARITY" values. SYSTICK_MILLISECOND is a good value to use. Any finer granularity may interrupt the CPU too often. For example, a microsecond timer only allows ~50 instructions to execute between interrupts on a 48MHz system.

void JSAPI_CORTEX_CORE::SysTick_TimerAddHook

(

void(*)(void)

func

)

Hook into the SYSTICK interrupt.

Parameters

func	user function to be called. When the SYSTICK interrupt occurs, "func" will be called. Only the last function registered will be called.

---

The documentation for this class was generated from the following file:

• jsapi_common.h