Timer processing

Presentation

There can be up to tmrN timers

The first parameter tmr of the functions below is the timer number (0..tmrN-1)

The parameter dly (delay) is the number of centiseconds to wait

Functions
int	tmrStart (unsigned char tmr, int dly)
	start the timer tmr for dly centiseconds More...
int	tmrGet (unsigned char tmr)
	get the number of centiseconds waitng for timer tmr More...
void	tmrStop (unsigned char tmr)
	stop the timer tmr More...

Function Documentation

int tmrStart	(	unsigned char	tmr,
		int	dly
	)

start the timer tmr for dly centiseconds

Start a timer number tmr for dly/100 seconds.

There are 4 timers numbered from 0 to 3.

After starting a timer a function tmrGet() should be called to know whether it is over or not.

The timer should be over after dly/100 seconds.

Parameters

tmr	(I) Timer number 0..tmrN-1
dly	(I) Initial timer value in hundredth of second

Returns

non-negative value if OK; negative otherwise Utilities.h Peripherals.c

int tmrGet

(

unsigned char

tmr

)

get the number of centiseconds waitng for timer tmr

Return the state of the timer tmr.

Parameters

tmr	(I) Timer number 0..tmrN-1

Returns

• negative if failure.
• otherwise the number of centiseconds rest. Utilities.h Peripherals.c

void tmrStop

(

unsigned char

tmr

)

stop the timer tmr

Stop a timer number tmr.

Should be called when the timer is no more needed.

Parameters

tmr	(I) Timer number 0..tmrN-1

Returns

no Utilities.h Peripherals.c