CGM.c File Reference

Clock Generation Module. More...

#include "derivative.h"
#include "CGM.h"

Functions
void	vfnClockOutputEnable (CGMCLKOutConfig_t tMyCGMConfig)
	Given that P[22] is enabled, this function enables or disables output of a clock signal to the CLKOUT pin.
uint8_t	u8fnClockPLLConfig (uint8_t u8PLLInstance, uint8_t u8IDF, uint8_t u8ODF, uint8_t u8LDF)
	This function allows to configure a PLL setting in order to change the frequency of the system bus (or any other). It responds to the formula (Fosc * LDF) / (IDF * ODF).
void	vfnClockClearPLLFlag (uint8_t u8PLLInstance)
	This function clears any existing PLL faults for a given instance.

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Detailed Description

Clock Generation Module.

Copyright (c) 2011 Freescale Semiconductor Freescale Confidential Proprietary

Author:

Freescale Semiconductor

SASD Automotive

R11515

Version:

Date:

Warning:

(If needed)

History:

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Function Documentation

uint8_t u8fnClockPLLConfig	(	uint8_t	u8PLLInstance,
		uint8_t	u8IDF,
		uint8_t	u8ODF,
		uint8_t	u8LDF
	)

This function allows to configure a PLL setting in order to change the frequency of the system bus (or any other). It responds to the formula (Fosc * LDF) / (IDF * ODF).

Parameters:

u8PLLInstance,:

Either 0 or 1, depending on which PLL we're config u8IDF: IDF value in the formula. Can't be bigger than 4 bits. u8ODF: IDF value in the formula. Can't be bigger than 2 bits. u8LDF: IDF value in the formula. Can't be bigger than 7 bits.

Returns:

Clear if everything is in order; INVALID_PLL_INSTANCE if the passed instance is invalid; INVALID_PLL_DIVIDER if any of the passed arguments is outside of the valid values.

void vfnClockClearPLLFlag

(

uint8_t

u8PLLInstance

)

This function clears any existing PLL faults for a given instance.

Parameters:

u8PLLInstance,:

Either 0 or 1, depending on which PLL we're config

Returns:

void.

void vfnClockOutputEnable

(

CGMCLKOutConfig_t

tMyCGMConfig

)

Given that P[22] is enabled, this function enables or disables output of a clock signal to the CLKOUT pin.

Parameters:

tMyCGMConfig,:

Contains enable/disable information, as well as the divisor value (1, 2, 4, 8) and the source (IRC, XTAL, PLL0 or PLL1) as defined by CGMCLKOutConfig_t.

Returns:

void.