Functions

General Description

Functions
uint32_t	Cy_SysClk_AltHfGetFrequency (void)
	Reports the frequency of the Alternative High-Frequency Clock. More...
cy_en_sysclk_status_t	Cy_SysClk_AltHfEnable (uint32_t timeoutus)
	Enables the ATLHF. More...
bool	Cy_SysClk_IsAltHfEnabled (void)
	Reports if ALTHF is enabled or not. More...

Function Documentation

Cy_SysClk_AltHfGetFrequency()

uint32_t Cy_SysClk_AltHfGetFrequency

(

void

)

Reports the frequency of the Alternative High-Frequency Clock.

Note

This API is available for CAT1A (excluding TVIIBE) and CAT1B devices.

Function Usage

    /* BLE ECO configuration: ECO Frequency: 32 MHZ, Divider: 2 */
    /* Start-up time(uS): 1500, Load cap(pF): 9.9 */
    
    uint32_t startTime = (uint32_t)(1500 / 31.25);
    uint32_t loadCap   = (uint32_t)((9.9 - 7.5) / 0.075);
    
    /* Configure the BLE ECO clock */
    (void) Cy_BLE_EcoConfigure(CY_BLE_BLESS_ECO_FREQ_32MHZ, CY_BLE_SYS_ECO_CLK_DIV_2, loadCap, startTime, CY_BLE_ECO_VOLTAGE_REG_AUTO);
    
    /* In case if there is a need to get the BLE ECO frequency */
    uint32_t bleEcoFreq = Cy_SysClk_AltHfGetFrequency();

Cy_SysClk_AltHfEnable()

cy_en_sysclk_status_t Cy_SysClk_AltHfEnable

(

uint32_t

timeoutus

)

Enables the ATLHF.

Note

This API is available for CAT1B devices.

Returns

Error / status code:
CY_SYSCLK_SUCCESS - ALTHF successfully disabled
CY_SYSCLK_TIMEOUT - ALTHF enabling failed due to timeout

Cy_SysClk_IsAltHfEnabled()

bool Cy_SysClk_IsAltHfEnabled

(

void

)

Reports if ALTHF is enabled or not.

Note

This API is available for CAT1B devices.

Returns

Status of ALTHF
true = Enabled
false = Not Enabled