[En-Nut-Discussion] Timers in Eth board 1.3H
dferbas at etech.cz
Wed Jun 3 10:18:42 CEST 2009
I used a prepared page title to store a code snippet to the NutWiki:
This example shows how to setup timer1 for ms periods.
How exact microsecond period you need ?
If not too exact, use following calculations:
number_of_required_counts = 1/(period_ms/1000000)
freq_divisor = 14745600/number_of_required_counts
timer_divisor = 14745600/freq_divisor (rounded value if integer
arithmetics was used)
#define TIMER1_DIVISOR_20us 14745600/295 //NUT_CPU_FREQ/...
#define TIMER1_DIVISOR_50us 14745600/737
Note: For details look for TCCR1B register description (page 134 -
135 in ATmega128 data sheet).==========================
At 12:00 2.6.2009, you wrote:
>From: <Prasad.Nagapati at infineon.com>
>Date: Tue, 2 Jun 2009 16:48:37 +0800
>I have many doubts regarding the Timer and counter in the Eth board.
>Since I am very new to this area (Not the timer and counter :-) but in
>the board level programming)
>I want to measure the events in microseconds, so I need a much bigger
>resolution timer. ...
>I went in NutWiki but if I click the samples I am not getting any
>information even though I have logged in.
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