James.
     Your are correct. That is a typing mistake. It should be TMR1ON =3D 0=
=20
or 1; //for off or on. My brain slipped. Sorry about that. So does this=20
work? Will this reset the timer to the proper values so that I can=20
always know that the timer will rollover at 100mS?
Thanks,
rich!

         //Global variables
int count =3D 0;

void main(void)
{

     PORTA =3D 0;            //    Turn porta off
     TRISA =3D 255;        //    Set Porta as all inputs
     PORTC =3D 2;            //    Set RC1 to RC5 high
     TRISC =3D 193;        //    Start with DP1 on, the rest of portc is=20
inputs
     CMCON0 =3D 7;         //  Turn off Comparators
     ANSEL =3D 16;         //  Set RC0/AN4 as analog

// Define commands
     int    DP =3D 1;
     int Reset =3D 33 + DP;
     int GateOn =3D 17 + DP;
     int GateOff =3D DP;

while (1 =3D=3D 1)            //    Loop forever
     {
         PORTC =3D Reset;        //    Clear the Display
         PORTC =3D GateOn;        //    Start counting
         delay(1);            // Count the frequency for one second =3D HZ
         PORTC =3D GateOff;
         delay(15);            // Display the frequency for 15 seconds

     }
}    //  End NewControlCode.c

void delay(int time)
{
     int limit =3D time * 10 + 1;

     TMR1ON =3D 0;
     TMR1IE             =3D 0;
     //PIR1bits.TMR1IE    =3D 0;
     resettimer();
     count =3D 0;
     //PIR1bits.TMR1IE    =3D 0;
     TMR1IE             =3D 1;
     TMR1ON =3D 1;

     while(count < limit)
     {
     }
    return;
}

void resettimer(void)
{
     TMR1H =3D 0x0B;
     TMR1L =3D 0xDC;
}
//Timer1
//Prescaler 1:8; TMR1 Preload =3D 3036; Actual Interrupt Time : 100 ms

//Place/Copy this part in declaration section

void InitTimer1(){
   T1CON                 =3D 0x31;
   PIR1bits.TMR1IF     =3D 0;
   TMR1H                 =3D 0x0B;
   TMR1L                 =3D 0xDC;
   TMR1IE             =3D 1;
   INTCON             =3D 0xC0;
}

void Interrupt(){
   if (PIR1bits.TMR1IF){
     PIR1bits.TMR1IF =3D 0;
     TMR1H             =3D 0x0B;
     TMR1L             =3D 0xDC;
     count++;
   }
}

On 7/21/2014 11:47 PM, James Cameron wrote:
> On Mon, Jul 21, 2014 at 11:28:41PM -0500, Richard R. Pope wrote:
>>       In MpLab with XC8 the timer on and off control is called TMRxON,
>> where x is the timer number.
> Nearly.  Only for Timer 1 and 2, not for Timer 0.
>
>> So for my program to turn timer1 on or off
>> the instruction is:
>>           TMR1ON =3D 0;     //The timer is off
>>           TMR1OFF =3D 1;  //The timer is on.
>> This is in the 16f684 datasheet. I thought I would let everyone know.
> No, there's no such thing as TMR1OFF.  Use TMR1ON instead.
>
> Look at the diagram in Figure 6-1 of the PIC16F684 datasheet, and
> you'll see how TMR1ON is used to "gate" the clock that increments
> TMR1.
>
> So with TMR1ON low (0) no clock gets to the counter.
>

--=20
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