SPWM and Elapsed Timer

[CocaColaKid]

Is it possible to run these two beasts together since they both use TMR1?

[Darrel Taylor]

You could change the Elapsed Timer to a different timer fairly easily.

SPWM should stay on Timer1, because it needs a 16-bit timer, and is harder to modify.
<br>

[CocaColaKid]

Darrel,

What files would need to be modified? Just the Elapsed_INT.bas? Would you be able to help with the ASM part of it as it is for the most part greek to me. Oh yeah, the PIC I'm using it the 16F88 @ 10 MHz.

[Darrel Taylor]

Would you be able to help with the ASM part of it as it is for the most part greek to me.

That's too bad....
ASM is the Best part of Picbasic Pro.

Learning one without the other is like buying a space shuttle without the solid rocket boosters.
It looks nice, but it's not going to take you where you want to go. <hr>
Ok, here ya go.

The Elapsed Timer for use with Timer 2.

<font color="#0000FF"><b><i>; Initialze your hardware and LCD first

</i></b></font><font color="#008000"><b>INCLUDE </b></font><font color="#FF0000">&quot;DT_INTS-14.bas&quot;     </font><font color="#0000FF"><b><i>' Required
</i></b></font><font color="#008000"><b>INCLUDE </b></font><font color="#FF0000">&quot;Elapsed-T2.bas&quot;     </font><font color="#0000FF"><b><i>' Elapsed Timer for TMR2

</i></b></font><font color="#008000"><b>ASM
</b></font><font color="#000080">INT_LIST  macro    </font><font color="#0000FF"><b><i>; IntSource,        Label,  Type, ResetFlag?
        </i></b></font><font color="#000080">INT_Handler   TMR2_INT,  _ClockCount,   ASM,  yes
    endm
    INT_CREATE               </font><font color="#0000FF"><b><i>; Creates the interrupt processor

    </i></b></font><font color="#000080">INT_ENABLE  TMR2_INT      </font><font color="#0000FF"><b><i>; Enable TMR2 Interrupts  
</i></b></font><font color="#008000"><b>ENDASM

GOSUB </b></font><b>ResetTime
</b><font color="#008000"><b>GOSUB </b></font><b>StartTimer

Main</b>:
    <font color="#008000"><b>IF </b></font><b>SecondsChanged </b>= <font color="#800000"><b>1 </b></font><font color="#008000"><b>THEN
       LCDOUT </b></font><font color="#800000"><b>$FE</b></font>,<font color="#800000"><b>2</b></font>, <font color="#008000"><b>DEC </b></font><b>Days</b>,<font color="#FF0000">&quot;d-&quot;</font>,<font color="#008000"><b>DEC2 </b></font><b>Hours</b>,<font color="#FF0000">&quot;:&quot;</font>,<font color="#008000"><b>DEC2 </b></font><b>Minutes</b>,<font color="#FF0000">&quot;:&quot;</font>,<font color="#008000"><b>DEC2 </b></font><b>Seconds
       SecondsChanged </b>= <font color="#800000"><b>0
    </b></font><font color="#008000"><b>ENDIF
GOTO </b></font><b>Main</b>

[CocaColaKid]

Oh thank you very much. Now I have to compare the two and see exactly what is different and figure out why.

I know I have to learn ASM as it is the foundation on which PBP is built. It's just a lot harder to understand for us noobies.

[CocaColaKid]

Darrel,

Is there a better way to output a 82Hz PWM single than using your software routine. Your routine works perfect however I also need to read a frequency of 0-1kHz at the same time. With the resolution of 256 steps @ 82Hz its pretty interrupt hungry.

Here's what I'm trying to accomplish

TMR1 is being used for SPWM - 0-24VDC @ 82Hz
TMR2 is being used for HPWM - 0-10VDC

If I use the COUNT command it works perfect, only if I disable the interrupts though. This in turn kills the SPWM which I can't have happen. Any suggestions? Not looking for a hand out by any means, just some help pointing in the right direction. The best way to learn is do it yourself I believe.