Advice on frequency measurement to 30MHz


Closed Thread
Results 1 to 3 of 3

Hybrid View

  1. #1
    Join Date
    Jul 2003
    Posts
    2,405


    Did you find this post helpful? Yes | No

    Default

    Andy,

    Have a look at this app note. It's for a 50MHz freq counter using an old C series PIC.
    http://ww1.microchip.com/downloads/e...tes/00592d.pdf
    Regards,

    -Bruce
    tech at rentron.com
    http://www.rentron.com

  2. #2
    Join Date
    Apr 2007
    Posts
    53


    Did you find this post helpful? Yes | No

    Default

    Hi Bruce,

    Thanks for the info. I now remember seeing that app note many years ago.

    I also found this thread which has helped me get something up and operational on a 16f877 for starters.

    http://www.picbasic.co.uk/forum/showthread.php?t=1137

    I used Timer1 (T1CKI) as the input (as it is 16bit) and Timer0 with a period of 1mS for the timing. I had to fudge the resulting values just a bit as there is a small error due to timer resolution and program overhead.


    Andy

Similar Threads

  1. HPWM command and oscillator frequency
    By RussMartin in forum mel PIC BASIC Pro
    Replies: 3
    Last Post: - 8th March 2009, 22:41
  2. Timer1 - frequency measurement
    By -Dan- in forum mel PIC BASIC Pro
    Replies: 15
    Last Post: - 5th November 2008, 10:31
  3. HPWM10 Frequency Updating
    By duncan303 in forum mel PIC BASIC Pro
    Replies: 17
    Last Post: - 19th January 2008, 12:30
  4. inaccurate frequency using TMR1 PI18F452
    By nkarpovich in forum mel PIC BASIC Pro
    Replies: 14
    Last Post: - 14th October 2006, 16:22
  5. frequency measurement
    By big-x in forum General
    Replies: 2
    Last Post: - 25th November 2005, 00:53

Members who have read this thread : 0

You do not have permission to view the list of names.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts