Timer.c File Reference

A timer module. More...

Go to the source code of this file.

Functions
int8_t	CheckTimer (uint32_t *pulTimer)
	Check if timer is elapsed, incactive or still busy. More...
void	SetTimer (uint32_t *pulTimer, uint32_t ulValue)
	Set a timer. More...
int8_t	AddTimer (uint32_t *pulTimer, uint32_t ulValue)
	Add time period to an already initialized timer. More...
void	ResetTimer (uint32_t *pulTimer)
	Reset a timer. More...
void	WaitTimer (uint16_t usValue)
	Wait for usValue milliseconds. More...

Variables
static const uint32_t	MAX_TIMEDIFF = ((UINT32_MAX / 2) - 1)
	Maximum time difference. More...

Detailed Description

A timer module.

Defines a timer module that can handle an unlimited number of (software) timers. Only one hardware timer (HwTimer interface) is used.

For description and examples see Timer.md.

History:

• 2016-08-17 Pi: use stdint.h, const instead of #define

Version

$Id: Timer.c 159 2016-09-03 06:51:47Z pischky $

Author

Stefan Bormann

Definition in file Timer.c.

Function Documentation

int8_t AddTimer	(	uint32_t *	pulTimer,
		uint32_t	ulValue
	)

Add time period to an already initialized timer.

Parameters

pulTimer	Reference to timer
ulValue	Timer increment in [ms]

Returns

• -1 = Error, timer value to long or timer not initialized
• 0 = Ok

Definition at line 94 of file Timer.c.

int8_t CheckTimer

(

uint32_t *

pulTimer

)

Check if timer is elapsed, incactive or still busy.

When a timer has elapsed, the state of this timer is set to inactive.

Parameters

pulTimer

Reference to timer

Returns

• -1 = Timer inactive
• 0 = Timer elapsed
• 1 = Timer busy

Definition at line 28 of file Timer.c.

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void ResetTimer

(

uint32_t *

pulTimer

)

Reset a timer.

Afterwards the timer state is inactive.

Parameters

pulTimer

Reference to timer

Definition at line 115 of file Timer.c.

void SetTimer	(	uint32_t *	pulTimer,
		uint32_t	ulValue
	)

Set a timer.

Parameters

pulTimer	Reference to timer
ulValue	Timer value in [ms]

Definition at line 69 of file Timer.c.

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void WaitTimer

(

uint16_t

usValue

)

Wait for usValue milliseconds.

This function doesn't returns before the timer is elapsed.

Deprecated:

do not use anymore

Parameters

usValue

Timer value in [ms]

Definition at line 121 of file Timer.c.

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Variable Documentation

const uint32_t MAX_TIMEDIFF = ((UINT32_MAX / 2) - 1)

static

Maximum time difference.

Definition at line 25 of file Timer.c.