Functions

General Description

API Reference
	Cortex-M33 Control Functions
	Cortex-M55 Control Functions

Functions
void	SystemInit (void)
	Initializes the system. More...
void	SystemCoreClockUpdate (void)
	Update information about system clocks. More...
void	SystemCoreClockSetup (uint32_t systemCoreClk_freq_hz, uint32_t ahb_freq_hz)
	Populates system clock frequency variables with the provided values. More...
void	Cy_SystemInit (void)
	Performs custom system initialization. More...

Function Documentation

SystemInit()

void SystemInit

(

void

)

Initializes the system.

Custom steps can be added to this process by overrding the weak Cy_SystemInit() function.

Initializes the system.

Initialize the System and update the SystemCoreClock variable.

SystemCoreClockUpdate()

void SystemCoreClockUpdate

(

void

)

Update information about system clocks.

Gets core clock frequency and updates SystemCoreClock, and cy_AhbFreqHz.

Updates global variables used by the Cy_SysLib_Delay(), Cy_SysLib_DelayUs(), and Cy_SysLib_DelayCycles().

Update information about system clocks.

Updates the SystemCoreClock with current core Clock retrieved from cpu registers.

SystemCoreClockSetup()

void SystemCoreClockSetup	(	uint32_t	systemCoreClk_freq_hz,
		uint32_t	ahb_freq_hz
	)

Populates system clock frequency variables with the provided values.

Sets the startup clock frequencies of SystemCoreClock, and cy_AhbFreqHz variables.

Parameters

systemCoreClk_freq_hz	Frequency in Hz for the System Core Clock (e.g. Cortex-M33)
ahb_freq_hz	Frequency in Hz of the AHB source

Note

This API does not take into account any run-time clock frequency updates. Should any updates occur, SystemCoreClockUpdate must be called afterwards on the CM33_NS and CM55.

Populates system clock frequency variables with the provided values.

Sets the SystemCoreClock with initial core Clock retrieved from cpu registers.

Cy_SystemInit()

void Cy_SystemInit

(

void

)

Performs custom system initialization.

The function is called during device startup. This is a weak function that by default does nothing. It can be overridden to add custom steps to SystemInit