Port indexing & PWM for LED fade

[Art]

Looks good to me if the addressing works with PWM.
What happens if you only try to PWM a single LED when you address it that way.. same thing?


I've read about the trick to address pins, what if you knock them into a declared array first,
and then aliased each one, I wonder what that would do.

pins[8] var byte
portb.0 var pins[0]
portb.1 var pins[1]
portb.2 var pins[2]…


Then cycle "pins" in the PWN command
for selected = 0 to 7
pins[selected] = value
next selected

[Art]

but my comment is, software PWM command (not HPWM) is a dead end.

How about starting with a constant loop that counts from zero to something,
or a hardware counter, then look at that counter each cycle of your program,
and determining which LEDs to turn on or off based on their own preset on/off counters.

Then you can vary the counters, and you're not limited to a single simultaneous PWM channel.

[MOUNTAIN747]

Art, Thanks for your reply. PWM with a single LED or port (LED1 var PortB.1) or single port (PortB.1) will work with PWM however I have been unable to get indexing to work with the PWM in any shape, form, or fashion. Some LED will light up but will not be the one you addressed. I think the problem must be within the PWM command structure. It will not recognize the indexing as a port location. I tried several versions of your suggestion of array declaration, no luck. I think indexing in some form should work but I have not figured it out yet. I have the routine working with Select Case approach but an indexing method would reduce the code considerably. Work continues…