PIT.c File Reference

Periodic Interrupt Timer driver for MPC5604P. More...

#include "Compile_Options.h"
#include "derivative.h"
#include "PIT.h"

Functions
uint8_t	u8fnPITConfig (const uint8_t u8Channel, const uint32_t u32InitialCount, const uint8_t u8UseISR)
	Configures a particular PIT channel for immediate operation.
void	vfnPITStart (const uint8_t u8Channel, const uint8_t u8Enable)
	Starts or stops the timer for a particular PIT channel.
uint8_t	u8fnPITWaitByPoll (const uint8_t u8Channel, const uint8_t u8Restart)
	Waits for a PIT channel to expire in RUN mode.

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Detailed Description

Periodic Interrupt Timer driver for MPC5604P.

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 u8fnPITConfig	(	const uint8_t	u8Channel,
		const uint32_t	u32InitialCount,
		const uint8_t	u8UseISR
	)

Configures a particular PIT channel for immediate operation.

Parameters:

u8Channel,:	PIT channel number (0 - 3 for Pictus)
u32InitialCount,:	Number of cycles to count before flagging
u8UseISR,:	Switch to allow for interrupts or not

Returns:

CLEAR if all went ok; PIT_INVALID_CH if the passed channel doesn't exist in HW

uint8_t u8fnPITWaitByPoll	(	const uint8_t	u8Channel,
		const uint8_t	u8Restart
	)

Waits for a PIT channel to expire in RUN mode.

Parameters:

u8Channel,:	PIT channel number (0 - 3 for Pictus)
u8Restart,:	If non-zero, the PIT timer will be restart immediately

Returns:

Zero when PIT counted down correctly, PIT_ERROR_TIMED_OUT otherwise.

void vfnPITStart	(	const uint8_t	u8Channel,
		const uint8_t	u8Enable
	)

Starts or stops the timer for a particular PIT channel.

Parameters:

u8Channel,:	PIT channel number (0 - 3 for Pictus)
u8Enable,:	If non-zero, the timer will start, if zero it will stop

Returns:

Void.