Functions

General Description

Functions
void	Cy_SysClk_ClkPeriSetDivider (uint8_t divider)
	Sets the clock divider for the peripheral clock tree. More...
uint32_t	Cy_SysClk_ClkPeriGetFrequency (void)
	Reports the frequency of the peri clock. More...
uint8_t	Cy_SysClk_ClkPeriGetDivider (void)
	Returns the clock divider of the peripheral (peri) clock. More...

Function Documentation

Cy_SysClk_ClkPeriSetDivider()

void Cy_SysClk_ClkPeriSetDivider

(

uint8_t

divider

)

Sets the clock divider for the peripheral clock tree.

All peripheral clock dividers are sourced from this clock. Also the Cortex M0+ clock divider is sourced from this clock. The source of this divider is clkHf[0]

Parameters

divider

divider value between 0 and 255 Causes integer division of (divider value + 1), or division by 1 to 256.

Note

Call SystemCoreClockUpdate after this function calling.

This API is available for CAT1A & CAT1C devices.

Function Usage

    /* Scenario: HFCLK0 is configured and enabled. The Peri clock sourcing the
                 majority of peripherals must run at a frequency that is 1/2
                 of HFCLK0. */

    if(1U != Cy_SysClk_ClkPeriGetDivider())
    {
        Cy_SysClk_ClkPeriSetDivider(1U);
    }

    /* Get the Peri clock output frequency */
    uint32_t clkPerifreq = Cy_SysClk_ClkPeriGetFrequency();

Cy_SysClk_ClkPeriGetFrequency()

uint32_t Cy_SysClk_ClkPeriGetFrequency

(

void

)

Reports the frequency of the peri clock.

Returns

The frequency, in Hz.

Note

This API is available for CAT1A & CAT1C devices.

Function Usage

    /* Scenario: HFCLK0 is configured and enabled. The Peri clock sourcing the
                 majority of peripherals must run at a frequency that is 1/2
                 of HFCLK0. */

    if(1U != Cy_SysClk_ClkPeriGetDivider())
    {
        Cy_SysClk_ClkPeriSetDivider(1U);
    }

    /* Get the Peri clock output frequency */
    uint32_t clkPerifreq = Cy_SysClk_ClkPeriGetFrequency();

Cy_SysClk_ClkPeriGetDivider()

uint8_t Cy_SysClk_ClkPeriGetDivider

(

void

)

Returns the clock divider of the peripheral (peri) clock.

Returns

The divider value. The integer division done is by (divider value + 1), or division by 1 to 256.

Note

This API is available for CAT1A & CAT1C devices.

Function Usage

    /* Scenario: HFCLK0 is configured and enabled. The Peri clock sourcing the
                 majority of peripherals must run at a frequency that is 1/2
                 of HFCLK0. */

    if(1U != Cy_SysClk_ClkPeriGetDivider())
    {
        Cy_SysClk_ClkPeriSetDivider(1U);
    }

    /* Get the Peri clock output frequency */
    uint32_t clkPerifreq = Cy_SysClk_ClkPeriGetFrequency();