Multi Slow speed PWM and Instant Interrupts

[DaveC3]

I am using a 18F14K50 with Instant Interrupts to refresh USB service. I want to use the slow speed PWM code Darrel Taylor has posted way back when.

I am using PBP 2.6 MPLAB 8.33.

The program excluding Slow Speed PWM compiles and works fine.

When I add (Include "Multi_SPWM.pbp" ) I get these errors
ERROR Line 23: Redefinition of VAR. (DT_INTS-18.bas)
ERROR Line 24: Redefinition of VAR. (DT_INTS-18.bas)
ERROR Line 25: Redefinition of VAR. (DT_INTS-18.bas)


If I comment the wsave, ssave and bsave in Multi_SPWM.pbp I get these errors

Duplicate macro name (int_return)
Unmatched ENDM

I assume it is a conflict between the multi slow speed PWM and the instant interrupt codes. I do not know if it is possible to run both at the same time.

Thanks

Dave

[Darrel Taylor]

Hi Dave,

You can use the SPWM_INT version with DT_INTS-18.

http://www.darreltaylor.com/DT_INTS-14/SPWM.html
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[DaveC3]

Thanks Darrel

I will give it a try.

Dave

[DaveC3]

Darrel

It worked great

Thanks again

Dave

[aberco]

Trying to get that setup working too, PIC18F14K50 and these:

INCLUDE "cdc_desc.bas"
INCLUDE "DT_INTS-18.bas"
INCLUDE "ReEnterPBP-18.bas" 
INCLUDE "SPWM_INT.bas"
INCLUDE "USB_ASM_Service.pbp"

ASM
;----[High Priority Interrupts]-------------------------
INT_LIST  macro     ; IntSource,          Label,  Type, ResetFlag?
        INT_Handler     INT0_INT,   _ButtonPressed,   PBP,  Yes
        INT_Handler   TMR1_INT,  SPWMhandler,  ASM,  yes
        INT_Handler     USB_INT,  _DoUSBSERVICE,   PBP,  yes
    endm
    INT_CREATE ; Creates the High Priority interrupt processor
ENDASM

However I'm having a hard time to get a smooth PWM output that is not perturbed by the DoUSBSERVICE routine... So far the best results I got is by inserting INT_DISABLE USB_INT / INT_ENABLE USB_INT into the SPWMhandler, however the output still flicker quite a bit. I also tried to turn USB_INT into a lower priority interrupt but that doesn't work (the PIC does crash).

Is there a particular solution to make them work together? any hint on this would be greatly appreciated.

[Darrel Taylor]

USB_INT should be an ASM "type" interrupt. I think we talked about that before.
Make it low priority.

How many SPWMints, what freq, what resolution.
Not enough information, and I'd guess you are maxed out.

Remember ... 25,600 interrupts per second for SPWM_RES 256 @ 100hz.