Functions

Functions
__STATIC_INLINE void	Cy_SysClk_ClkSysSetDivider (cy_en_sysclk_dividers_t divider)
	Sets the SYSCLK clock divider, which sources the main processor. More...
__STATIC_INLINE cy_en_sysclk_dividers_t	Cy_SysClk_ClkSysGetDivider (void)
	Returns the SYSCLK clock divider. More...
__STATIC_INLINE uint32_t	Cy_SysClk_ClkSysGetFrequency (void)
	Reports the frequency of the SYSCLK clock. More...

Detailed Description

Function Documentation

Cy_SysClk_ClkSysSetDivider()

__STATIC_INLINE void Cy_SysClk_ClkSysSetDivider

(

cy_en_sysclk_dividers_t

divider

)

Sets the SYSCLK clock divider, which sources the main processor.

The source of this divider is HFCLK.

Parameters

divider

- SYSCLK divider value cy_en_sysclk_dividers_t.

Note

Call SystemCoreClockUpdate after this function calling.

Call Cy_SysLib_SetWaitStates before calling this function if SYSCLK frequency is increasing.

Call Cy_SysLib_SetWaitStates after calling this function if SYSCLK frequency is decreasing.

Function Usage

    /* Scenario: The SYSCLK should be configured to divide by 4. */

    if (CY_SYSCLK_DIV_4 != Cy_SysClk_ClkSysGetDivider())
    {
        /* Set the System clock divider to 4 */
        Cy_SysClk_ClkSysSetDivider(CY_SYSCLK_DIV_4);
    }

    /* Get the resulting SYSCLK output frequency */
    uint32_t sysFreq = Cy_SysClk_ClkSysGetFrequency();

Cy_SysClk_ClkSysGetDivider()

__STATIC_INLINE cy_en_sysclk_dividers_t Cy_SysClk_ClkSysGetDivider

(

void

)

Returns the SYSCLK clock divider.

Returns

The SYSCLK divider value, cy_en_sysclk_dividers_t :
CY_SYSCLK_NO_DIV - don't divide.
CY_SYSCLK_DIV_2 - divide by 2
CY_SYSCLK_DIV_4 - divide by 4
CY_SYSCLK_DIV_8 - divide by 8

Function Usage

    /* Scenario: The SYSCLK should be configured to divide by 4. */

    if (CY_SYSCLK_DIV_4 != Cy_SysClk_ClkSysGetDivider())
    {
        /* Set the System clock divider to 4 */
        Cy_SysClk_ClkSysSetDivider(CY_SYSCLK_DIV_4);
    }

    /* Get the resulting SYSCLK output frequency */
    uint32_t sysFreq = Cy_SysClk_ClkSysGetFrequency();

Cy_SysClk_ClkSysGetFrequency()

__STATIC_INLINE uint32_t Cy_SysClk_ClkSysGetFrequency

(

void

)

Reports the frequency of the SYSCLK clock.

Returns

The frequency, in Hz.

Function Usage

    /* Scenario: The SYSCLK should be configured to divide by 4. */

    if (CY_SYSCLK_DIV_4 != Cy_SysClk_ClkSysGetDivider())
    {
        /* Set the System clock divider to 4 */
        Cy_SysClk_ClkSysSetDivider(CY_SYSCLK_DIV_4);
    }

    /* Get the resulting SYSCLK output frequency */
    uint32_t sysFreq = Cy_SysClk_ClkSysGetFrequency();