DELAY

Collaboration diagram for DELAY:

Functions
static void	LL_InitTick (uint32_t HCLKFrequency, uint32_t Ticks)
	This function configures the Cortex-M SysTick source of the time base.
void	LL_Init1msTick (uint32_t HCLKFrequency)
	This function configures the Cortex-M SysTick source to have 1ms time base.
void	LL_mDelay (uint32_t Delay)
	This function provides accurate delay (in milliseconds) based on SysTick counter flag.

Detailed Description

Function Documentation

LL_Init1msTick()

void LL_Init1msTick

(

uint32_t

HCLKFrequency

)

This function configures the Cortex-M SysTick source to have 1ms time base.

Note

When a RTOS is used, it is recommended to avoid changing the Systick configuration by calling this function, for a delay use rather osDelay RTOS service.

Parameters

HCLKFrequency

HCLK frequency in Hz

Note

HCLK frequency can be calculated thanks to RCC helper macro or function LL_RCC_GetSystemClocksFreq

Return values

None

Definition at line 257 of file stm32f4xx_ll_utils.c.

References LL_InitTick().

Here is the call graph for this function:

LL_InitTick()

void LL_InitTick ( uint32_t HCLKFrequency, uint32_t Ticks )

inline

This function configures the Cortex-M SysTick source of the time base.

Parameters

HCLKFrequency

HCLK frequency in Hz (can be calculated thanks to RCC helper macro)

Note

When a RTOS is used, it is recommended to avoid changing the SysTick configuration by calling this function, for a delay use rather osDelay RTOS service.

Parameters

Ticks

Frequency of Ticks (Hz)

Return values

None

Definition at line 260 of file stm32f4xx_ll_utils.h.

Referenced by LL_Init1msTick().

LL_mDelay()

void LL_mDelay

(

uint32_t

Delay

)

This function provides accurate delay (in milliseconds) based on SysTick counter flag.

Note

When a RTOS is used, it is recommended to avoid using blocking delay and use rather osDelay service.

To respect 1ms timebase, user should call LL_Init1msTick function which will configure Systick to 1ms

Parameters

Delay

specifies the delay time length, in milliseconds.

Return values

None

Definition at line 273 of file stm32f4xx_ll_utils.c.

References LL_MAX_DELAY.