SYST API Specification

Overview

This section describes functions and macros of the driver's API.

Macros
#define	SYST_GetCntrVal()
	Returns inverse value of the 24-bit System Timer counter. More...
#define	SYST_ClrCntrVal()
	Clears 24-bit System Timer current counter value. More...
#define	SYST_Enable()
	Enables operation of the System Timer. More...
#define	SYST_Disable()
	Disables operation of the System Timer. More...
#define	SYST_Init(cfg, ip, callback)
	System Timer initialization. More...

Macro Definition Documentation

#define SYST_GetCntrVal

(

)

This macro returns inverse value of the 24-bit System Timer counter. The value equals to number of system clock ticks elapsed since Timer operation resumes after clearing.

Returns

uint32 24-bit Timer current value.

Note

Implemented as an inline macro.

See also

SYST_ClrCntrVal

#define SYST_ClrCntrVal

(

)

This macro clears 24-bit System Timer current counter value.

Note

Implemented as an inline macro.

See also

SYST_GetCntrVal

#define SYST_Enable

(

)

This macro enables operation of the System Timer.

Note

Implemented as an inline macro.

See also

SYST_Disable

#define SYST_Disable

(

)

This macro disables operation of the System Timer.

Note

Implemented as an inline macro.

See also

SYST_Enable

#define SYST_Init	(		cfg,
			ip,
			callback
	)

This function initializes System Timer module. Function also installs callback function for interrupt vector 15 (SysTick).

Parameters

cfg	Select one of SYST Configuration Structures
ip	Select one of the ARM Cortex-M0+ Interrupt Priority Levels.
callback	Pointer to the SYST Callback Function.

Note

Implemented as a function call.