Roman Black wrote:

> Christopher Tyler wrote:
> >
> > Hi, I am still an amateur PIC programmer and am having problem writing
> > a program. What I am trying to do is write a frequency generator to
> > generate pulses between 20 and 400Hz. I am using a 16C57 for the
> > program. I am using the RTCC to get the frequency. I tried using a
> > lookup table to change frequencies, but it was to big to fit into the
> > 1st 256bytes of the page(the simulator gave all sorts of wierd problems)
> > and I had to use 2 tables...one for the RTCC and another to change the
> > Prescaler.....This was not very effiecient......Can anyone give me any
> > ideas on other ways  of doing this?
>
> Hi Christopher, how many different frequencies
> do you need, and how accurate does each one have
> to be? 20Hz t 400Hz is not a very big range.
> -Roman
>

Preferably all 380, but in the program I cut it down to 20Hz  to 255Hz. with
one value for each frequency. This was so that all the registers were kept as
8bit . Also about 5% accuracy is alright.....I worked out a table
for each of the values.....just implementing it into the program is a
problem.. :)  I hope that helps.
-Chris


>
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