DT_Elapsed timer constant for 40 MHz?

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  1. - 11th July 2010, 08:10 #2
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    Kamikaze47
    Kamikaze47 is offline Senior Member
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    40mhz is too fast to get a 100hz interrupt without a pre-scaler.

    So what you will have to do is add this to the frequency part of Elapsed_INT-18.bas

    Code:
      If OSC == 40
TimerConst = 0CF2Dh
  EndIF
    And then add this line somewhere near the start of your program to set a 1:8 prescaler on TMR1.

    Code:
    T1CON.4=1
T1CON.5=1
    *note* untested

    *edit* changed values to make it more accurate
    Last edited by Kamikaze47; - 11th July 2010 at 08:16.
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