clockManager.h File Reference

Interface to the clock manager peripheral. More...

Go to the source code of this file.

Macros
#define	CLK_SRC_GND   0
	Clock source: Ground: 0Hz.
#define	CLK_SRC_OSCILLATOR   1
	Clock source: Oscillator: 19.2MHz.
#define	CLK_SRC_TESTDBG0   2
	Clock source: Testdebug0: 0Hz.
#define	CLK_SRC_TESTDBG1   3
	Clock source: TestDebug1: 0Hz.
#define	CLK_SRC_PLLA   4
	Clock source: PLLA: 0Hz.
#define	CLK_SRC_PLLC   5
	Clock source: PLLC: 1000MHz (changes with overclock)
#define	CLK_SRC_PLLD   6
	Clock source: PLLD: 500MHz.
#define	CLK_SRC_HDMI   7
	Clock source: HDMI: 216MHZ.

Functions
int	clkMan_init ()
	Initializes this peripheral interface, to use before any other function in this file. More...
int	clkMan_isInit ()
	true if clkMan_init has been called with success
int	clkMan_setClock_gp0 (int clockSrc, int divisorInt, int divisorFrac)
	sets the clock for the general purpouse clock 0 More...
int	clkMan_setClock_gp1 (int clockSrc, int divisorInt, int divisorFrac)
	sets the clock for the general purpouse clock 1 More...
int	clkMan_setClock_gp2 (int clockSrc, int divisorInt, int divisorFrac)
	sets the clock for the general purpouse clock 2 More...
int	clkMan_setClock_pcm (int clockSrc, int divisorInt, int divisorFrac)
	sets the clock for the pcm peripheral More...
int	clkMan_setClock_pwm (int clockSrc, int divisorInt, int divisorFrac)
	sets the clock for the pwm peripheral More...

Detailed Description

Interface to the clock manager peripheral.

This peripheral controls various clocks in the BCM283x SoCs, for each of these clocks you can set a clock source and a frequency divider.
See the CLK_SRC_* macros for the available clock sources and their speed.

Function Documentation

int clkMan_init

(

)

Initializes this peripheral interface, to use before any other function in this file.

Returns

negative in case of error

int clkMan_setClock_gp0	(	int	clockSrc,
		int	divisorInt,
		int	divisorFrac
	)

sets the clock for the general purpouse clock 0

Parameters

clockSrc	The desired clock source (use the CLK_SRC_* macros)
divisorInt	Integer part of the divisor
divisorFrac	Fractional part of the divisor

Returns

negative in case of error

int clkMan_setClock_gp1	(	int	clockSrc,
		int	divisorInt,
		int	divisorFrac
	)

sets the clock for the general purpouse clock 1

Parameters

clockSrc	The desired clock source (use the CLK_SRC_* macros)
divisorInt	Integer part of the divisor
divisorFrac	Fractional part of the divisor

Returns

negative in case of error

int clkMan_setClock_gp2	(	int	clockSrc,
		int	divisorInt,
		int	divisorFrac
	)

sets the clock for the general purpouse clock 2

Parameters

clockSrc	The desired clock source (use the CLK_SRC_* macros)
divisorInt	Integer part of the divisor
divisorFrac	Fractional part of the divisor

Returns

negative in case of error

int clkMan_setClock_pcm	(	int	clockSrc,
		int	divisorInt,
		int	divisorFrac
	)

sets the clock for the pcm peripheral

Parameters

clockSrc	The desired clock source (use the CLK_SRC_* macros)
divisorInt	Integer part of the divisor
divisorFrac	Fractional part of the divisor

Returns

negative in case of error

int clkMan_setClock_pwm	(	int	clockSrc,
		int	divisorInt,
		int	divisorFrac
	)

sets the clock for the pwm peripheral

Parameters

clockSrc	The desired clock source (use the CLK_SRC_* macros)
divisorInt	Integer part of the divisor
divisorFrac	Fractional part of the divisor

Returns

negative in case of error