A less Cumbersome way of manipulating several LEDS?

[HenrikOlsson]

In a similar vein, can I group just two specific leds together for ease of handling? (I always will want two specific LEDS to light/extinguish together - but want to treat them as one entity vs having to duplicate the commands to each port/pin per LED)

Why not wire them in "anti-parallel" then? One is on when pin is low, the other when pin is high and both are off when TRIS is 1.

/Henrik.

[HankMcSpank]

Why not wire them in "anti-parallel" then? One is on when pin is low, the other when pin is high and both are off when TRIS is 1.

/Henrik.

Because I need them to light up together....if I'm reading your suggestion correctly, only one LED can be on at a time?

[HenrikOlsson]

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.

[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