Variable to ports

[MattCritt]

I am sort of new using pic basic pro. I am learning it in school and i am working on a final project.

I am trying to take a variable and send it to several different parts simultaneously, i do not know if this is possible but my example is


would it work to:

'Initialize Variables


LED1 var byte
led1.0=porta.1
led1.1=portb.3
led1.2=portd.1

And then later in my code just write LED1=1 to turn on all 3 ports and LED1=0 to turn them off. would this work

thanks,

[Demon]

LED=%11111111 to turn all on
LED=%00000000 to turn all off (0 would work also)

Robert

[HenrikOlsson]

Hi,
No, you can't really do it like that.
You can't create an alias to individal pins "spanning" several ports like that - not that I know anyway.

And, another point:
When you say LED.1 = PortB.3 you assign the value of PortB.3 to LED.1 - that's definitely not what you want to do. To create aliases you use the VAR statement, just like you do when creating variables.

LED VAR PortB       ' LED is now an alias of PortB

Pretty useless example but anyway....

/Henrik.

[peterdeco1]

Just a thought. Haven't tried it:

LED1 var byte
CLEAR
LET LED1 = (YOUR VARIABLE #)
GOTO READPORT

READPORT:
IF LED1.BIT0 = 1 THEN HIGH PORTA.1
IF LED1.BIT1 = 1 THEN HIGH PORTB.3
IF LED1.BIT2 = 1 THEN HIGH PORTD.1

[Demon]

Actually, there was a way posted a while ago. I just can't remember what to use as search string to find it.

Robert


EDIT: Here, read this:

http://www.picbasic.co.uk/forum/showthread.php?t=3753

[HenrikOlsson]

Hi,
Yes of course but then you are actually executing code which writes each bit to the individual port pins.
Each output is written sequentially, they are not all written simultaneously which the OP asked about.

But there's no way around that as far as I know.

/Henrik.