Functions

Functions
__STATIC_INLINE void	Cy_SysClk_WcoEnable (uint32_t timeoutUs)
	Enables the WCO. More...
__STATIC_INLINE void	Cy_SysClk_WcoDisable (void)
	Disables the WCO.
__STATIC_INLINE bool	Cy_SysClk_WcoIsEnabled (void)
	Returns the WCO enable/disable state.
__STATIC_INLINE void	Cy_SysClk_WcoBypass (bool bypass)
	Enables/disables external clock input through the WCO input pin. More...

Detailed Description

Function Documentation

Cy_SysClk_WcoEnable()

__STATIC_INLINE void Cy_SysClk_WcoEnable

(

uint32_t

timeoutUs

)

Enables the WCO.

Parameters

timeoutUs

- WCO startup delay in microseconds.

Function Usage

    /* Scenario: The WCO needs to source the WDC timers.
     *           Timeout of 500ms is tolerable.
     *           (Please refer to the datasheet for your device)
     *           The WCO pins are configured using the gpio driver.
     */

    /* Enable the WCO with a timeout of 500000 microseconds */
    Cy_SysClk_WcoEnable(CY_SYSCLK_WCO_TIMEOUT_US);

Cy_SysClk_WcoBypass()

__STATIC_INLINE void Cy_SysClk_WcoBypass

(

bool

bypass

)

Enables/disables external clock input through the WCO input pin.

Parameters

bypass

true - external clock input through the WCO input pin (WCO bypass enabled) false - regular WCO operation (bypass disabled)

Function Usage

    /* Scenario: An external 32.768 KHz square-wave supplied through wco_out pin.
     *           The WCO pins are configured using the gpio driver.
     */

    /* Configure pins. The actual pin numbers may differ, please refer to the
     * device datasheet for the more details.
     */
    Cy_GPIO_Pin_FastInit(GPIO_PRT0, 4UL, CY_GPIO_DM_ANALOG, 0UL, HSIOM_SEL_GPIO);
    Cy_GPIO_Pin_FastInit(GPIO_PRT0, 5UL, CY_GPIO_DM_ANALOG, 0UL, HSIOM_SEL_GPIO);

    /* Disable the WCO */
    Cy_SysClk_WcoDisable();

    /* If WCO is not enabled */
    if (!Cy_SysClk_WcoIsEnabled())
    {
        /* Switch WCO in bypass mode */
        Cy_SysClk_WcoBypass(true);

        /* Enable the WCO with recommended timeout 15us */
        Cy_SysClk_WcoEnable(15UL);
    }