Getting started is confusing.

[Nigel Goodwin]

Thanks guys!

I think I'm starting to get the hang of it...sort of...

I'm just trying to do something simple here, just cause...

How do I turn on two LED's at a time?

Start:
     bsf     STATUS,RP0       ; select Register Page 1
     clrf    TRISC          ; make IO Pin C0 an output
     bcf     STATUS,RP0       ; back to Register Page 0
     bsf     PORTC,0        ; turn on LED C0 (DS1)


     goto    $                ; wait here

     end

From what I understand it's making the TRISC all outputs, then turning on the LED on PORTC, 0 (which I am assuming is RA0).

How do I tell it to also light up the LED next to it? (PORTC, 1)

Thanks!

Simply add 'bsf PORTC,1' after your 'bsf PORTC,0', it may be wise to place a NOP between them as well.

 

[Boomslang]

You can also switch all of the LED's on or off by doing something like this:
movlw b'11111111'
movwf PORTB

By changing some of the ones to zero's you can decide which you want on or off (assuming you have LED's connected to the other PORTB pins).

 

[Gayan Soyza]

@ crazylegsmurphy

Yes continuous direct bit manipulation is not a good idea like Nigel pointed.
Adding few "nop"s will resolve the problem.

You may refer what is Read Modify Write.