A less Cumbersome way of manipulating several LEDS?

[HankMcSpank]

Sorry, I misunderstood that. I thought you wanted one on when the other was off. I guess I kind of took that for granted because I can't really see the point in using more than one pin. Just wire the LEDs in parallel or, which is probably better, in series. Depends on the powersupply voltage and forward voltage drop of the particular LED.

Are these some high power blue LEDs? High current and high Vf? Is that the reason you need one pin for each LED? Please tell me what I'm missing :-)

/Henrik.

Yes, I'm using high brightness blue leds (fwd voltage 3.2V, my PSU is 4V) in parallel drawing about 20mA, therefore two = 40ma...too much for one PIC pin...hence wanting to treat two pins as one virtual pin in code. But it's no big deal....thought I'd ask - and as ever there is something that exists that can be brought into play, except that I need to control the pin on/off via TRISC to avoid clicking so I can't personally use it.

[mark_s]

Maybe something like this? Not very swanky, but should work.

 
LED VAR WORD
 
Main:
LED = %XXXXX111111111 'ALL LEDS ON 
GOSUB LED_OUT
LED = %XXXXX000000000 'ALL LEDS OFF
GOSUB LED_OUT
 
Goto Main
 
LED_OUT:
PORTC.6 = LED.0
PORTB.6 = LED.1
PORTB.5 = LED.2
PORTB.4 = LED.3
PORTC.2 = LED.4
PORTC.1 = LED.5
PORTC.0 = LED.6
PORTA.2 = LED.7
PORTA.1 = LED.8
RETURN

[sayzer]

Since you are driving LEDs, why not MIBAM ?

[HankMcSpank]

Since you are driving LEDs, why not MIBAM ?

I have a common dim function in place already (via a PWM driven mosfet)...I don't really need dimming per pin

[HankMcSpank]

Hi Mark, Apologies...I missed your earlier contribution...that looks like something along the lines of what I need...I'll give it a try over the weekend - many thanks!

[Heckler]

You probably realize this... but you will need a pause, of some time delay, after each "GOSUB LED_OUT", in Mark's example. In order for your eye to see the LED's ON or OFF or they may just appear to be flickering at half brighteness.

Also the "X's" in the example will not compile... need to use "0's". At least they don't compile using microcodestudio.

LED VAR WORD
 
Main:
LED = %0000000111111111 'ALL LEDS ON 
GOSUB LED_OUT
PAUSE 500 'or delay of your choosing
LED = %0000000000000000 'ALL LEDS OFF
GOSUB LED_OUT
PAUSE 1000 'or delay of your choosing
 
Goto Main
 
LED_OUT:
PORTC.6 = LED.0
PORTB.6 = LED.1
PORTB.5 = LED.2
PORTB.4 = LED.3
PORTC.2 = LED.4
PORTC.1 = LED.5
PORTC.0 = LED.6
PORTA.2 = LED.7
PORTA.1 = LED.8
RETURN

good luck!!

[mark_s]

Heckler, you are right on all accounts.

In the digital world "X" means "don't care". A 1 or 0 will not cause a state change.
Sorry for the confusion. In PBP you can drop the leading zeros in a binary variable.
This %000000111111111 would equal %111111111.

Best regards