gnupic: terminology question
Subject:
Re: terminology question
From:
Byron A Jeff ####@####.####
Date:
26 Nov 2004 00:58:16 +0000
Message-Id: <20041126005809.GA26204@cleon.cc.gatech.edu>
On Fri, Nov 26, 2004 at 12:51:17PM +1300, David McNab wrote:
> Hi,
>
> In my timer0 and timer1 interrupt handler code, I'm setting the timer0
> and timer1 values to specific values, to speed up the interrupts.
>
> I'm sure it's a very common technique used by lots of people to
> guarantee interrupts coming in at an exact frequency.
>
> My question is - is there a term for this value written to the timer
> registers? In my code, I'm calling it a 'bias', but I'm sure there's a
> more appropriate term.
Two quick points. In older hardare like the 74161 4 bit syncronous counter
is called a preset.
Note that while this process gives you precise interrupts, that if you're
trying to keep track of real time, you lose a bit of accuracy by stopping
the clock and loading it with another value. For all precision timing applications
the timer needs to be free running.
BAJ
