system_M4521.h File Reference

#include <stdint.h>

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Macros
#define	DEBUG_PORT   UART0
#define	__HSI   (12000000UL)
#define	__HXT   (12000000UL)
#define	__LXT   (32768UL)
#define	__HIRC   (22118400UL)
#define	__LIRC   (10000UL)
#define	__SYS_OSC_CLK   ( ___HSI) /* Main oscillator frequency */
#define	__SYSTEM_CLOCK   (1*__HXT)

Functions
void	SystemInit (void)
	Setup the microcontroller system. Initialize the System and update the SystemCoreClock variable. More...
void	SystemCoreClockUpdate (void)
	Updates the SystemCoreClock with current core Clock retrieved from cpu registers. More...

Variables
uint32_t	SystemCoreClock
uint32_t	CyclesPerUs
uint32_t	PllClock

Macro Definition Documentation

__HIRC

#define __HIRC   (22118400UL)

Internal 22M RC Oscillator Frequency

Definition at line 37 of file system_M4521.h.

__HSI

#define __HSI   (12000000UL)

PLL default output is 72MHz

Definition at line 34 of file system_M4521.h.

__HXT

#define __HXT   (12000000UL)

External Crystal Clock Frequency

Definition at line 35 of file system_M4521.h.

__LIRC

#define __LIRC   (10000UL)

Internal 10K RC Oscillator Frequency

Definition at line 38 of file system_M4521.h.

__LXT

#define __LXT   (32768UL)

External Crystal Clock Frequency 32.768KHz

Definition at line 36 of file system_M4521.h.

__SYS_OSC_CLK

#define __SYS_OSC_CLK   ( ___HSI) /* Main oscillator frequency */

Definition at line 39 of file system_M4521.h.

__SYSTEM_CLOCK

#define __SYSTEM_CLOCK   (1*__HXT)

Definition at line 42 of file system_M4521.h.

DEBUG_PORT

#define DEBUG_PORT   UART0

Select Debug Port which is used for retarget.c to output debug message to UART

Definition at line 26 of file system_M4521.h.

Function Documentation

SystemCoreClockUpdate()

void SystemCoreClockUpdate

(

void

)

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

Update SystemCoreClock variable

Parameters

None

Returns

None

Definition at line 32 of file system_M4521.c.

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SystemInit()

void SystemInit

(

void

)

Setup the microcontroller system. Initialize the System and update the SystemCoreClock variable.

Initialize the system

Parameters

None

Returns

None

Setup the microcontroller system. Initialize the System and update the SystemCoreClock variable.

Initialize the system

Parameters

None

Returns

None

Definition at line 76 of file system_M4521.c.

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Variable Documentation

CyclesPerUs

uint32_t CyclesPerUs

extern

Cycles per micro second

Definition at line 25 of file system_M4521.c.

PllClock

uint32_t PllClock

extern

PLL Output Clock Frequency

Definition at line 26 of file system_M4521.c.

SystemCoreClock

uint32_t SystemCoreClock

extern

System Clock Frequency (Core Clock)

System Clock Frequency (Core Clock)

Definition at line 24 of file system_M4521.c.