pulse program for pic16f873

Discussion in 'Embedded Systems and Microcontrollers' started by haran, Jun 11, 2008.

  1. haran

    Thread Starter Active Member

    Apr 6, 2008
    42
    0
    can u guys help me to crate a pulse program for pic16f873? i need the pic 2 send out a pulse in the frequency of 40khz:confused:
     
  2. CVMichael

    Senior Member

    Aug 3, 2007
    416
    17
    I think what you need is to setup an interrupt, that turns one of the pins on and off, at your required frequency.

    I just found out how to use interrupts myself :)

    Here is the link:
    http://forum.allaboutcircuits.com/showthread.php?t=12179
    in the last post you will see code for the interrupt

    To calculate the values that you need for your frequency use this formula:
    pic_clock_MHz / 8 / prescaler / (256-Timer_initial_value) = your frequency

    Read pages 6 & 7 from the PDF link I posted for a better explanation on how to calculate the values
     
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