arm_cortex_m4_systick.h File Reference

Arm Cortex-M4 SysTick driver public API. More...

#include <stdint.h>
#include "err.h"

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Classes
struct	SYSTICK_CFG_ts
	Configuration structure for initializing the SysTick timer. More...

Enumerations
enum	SYSTICK_CLK_SOURCE_te { SYSTICK_CLK_SOURCE_EXTERNAL , SYSTICK_CLK_SOURCE_PROCESSOR }
	SysTick clock source selection. More...
enum	SYSTICK_IT_te { SYSTICK_IT_FALSE , SYSTICK_IT_TRUE }
	SysTick interrupt enable selection. More...

Functions
ERR_te	systick_init (SYSTICK_CFG_ts const *systick_cfg)
	Initializes and starts the SysTick timer.
void	systick_deinit (void)
	Deinitializes the SysTick timer.
void	systick_get_def_cfg (SYSTICK_CFG_ts *systick_cfg_o)
	Populates a configuration structure with the default SysTick settings.
uint32_t	systick_get_ms (void)
	Returns the number of milliseconds elapsed since SysTick was initialized.

Detailed Description

Arm Cortex-M4 SysTick driver public API.

Author

github.com/Baksi675

This module provides a millisecond-resolution tick counter backed by the Cortex-M4 SysTick timer. The counter is incremented in the SysTick exception handler and is accessible via systick_get_ms.

The reload value is computed automatically from the AHB clock frequency to produce a 1 ms tick period regardless of the system clock speed.

Typical usage:

• Call systick_get_def_cfg to obtain a default configuration
• Call systick_init to start the timer
• Call systick_get_ms anywhere in application code for timestamps and non-blocking delay calculations

Version

0.1

Date

2026-02-01

Copyright

Copyright (c) 2026

Definition in file arm_cortex_m4_systick.h.