MPLAB CODE

[pampam]

can anybody help in coding of frequency counter using PIC16F877 using MPLAB. frequency is supposed to display on 4 digit 7-segment led.

 

[itsmoked]

Is this for school?

Keith Cress
Flamin Systems, Inc.-

http://www.flaminsystems.com

 

[pampam]

No this is not for school. Actually this is for the our company and I am an employee. Giving you more details of my project- I am using signal generator to apply different kinds of waveforms(sinusoidal, square)applying to PortC and using PortD as output to display frequency on 4-digit 7-segment LED.
Awaiting for your reply.
thank you

 

[itsmoked]

Okay pampam;
You need to learn about multiplexing to do this.
Review these links.

http://picbasic.com/resources/articles/ledart.htm

http://www.mystrobl.de/ws/pic/mm47/index.htm

Section 5.4 of:

http://mic.unn.ac.uk/miclearning/modules/micros/ch5/micro05notes.html

http://ww1.microchip.com/downloads/en/AppNotes/00529e.pdf

Keith Cress
Flamin Systems, Inc.-

http://www.flaminsystems.com

 

[cbarn24050]

Somebody has done this allready, search around and you should find it. You cant get much in the way of high frequency measureing, somewhere around 80kHz if i remember right.

 

[VEBill]

80 kHz max? Is that all? Yikes. Circa 1980 I did up an audio frequency counter (sampled port) using a ~1 MHz MC6809E and it covered into (at least the low end of) tens of kHz. That's over a quarter century ago.

 

[Madcow]

I would use use one of the counters and
the capture and compare module.

I googled "frequency counter using PIC16F877" and got
alot of hits. One is:

http://www.piclist.com/techref/piclist/weedfreq.htm

a good list of progects is:

http://www.olimex.com/dev/picprojects.html

You could also try the manufacturers site.

http://ww1.microchip.com/downloads/en/AppNotes/00592d.pdf