At 02:44 16.7.1998 -0400, you wrote:
>Hi everyone,
>        I'm trying to find some code for a frequency genetator using a PIC.
>0Hz to 10khz    0.5Hz or 1Hz increments.
>I have been experiementing with PIC16C84, dividing a known frequency
>from the TRM0 Interupt, but dividing freqencies will not give me the
>freqency increments I need.
>eg 1MHz/100 = 10kHz
>   1MHz/101 = 9900.9Hz
>
>   1MHz/1,000,000 = 1Hz
>   1MHz/1,000,001 =0.9999999
>
>Any help will be greatly appretiated

Hello,

in the past, I designed the freq. generator (PIC driven) with DDS (Direct
Digital Synthesis) IC. Of course, it was for frequencies around 100 Mhz,
but I think that you can use similar approach. The IC I used was AD9850
(from Analog Devices) which work up to 180 Mhz (or similar) with resolution
0.029 Hz.
Also, if I remember correctly, there is a design of digitally controlled
freq. generator in Maxim datasheet for MAX038 function generator IC. The
resolution is 1 Hz, but I am not sure and I don't have the datasheet handy
here. Check their web site www.maxim-ic.com

Best regards

PavelK

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* Pavel Korensky                                                         *
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