> I am now excited about getting a $10 chip to light up an LED. :-)

How about $0.50?   PICs now cost less than floppies did when I first
bought one.

-- Lawrence Lile





John Nall <jnall01@ALLTEL.NET>
Sent by: pic microcontroller discussion list <PICLIST@MITVMA.MIT.EDU>
03/08/2003 06:56 AM
Please respond to pic microcontroller discussion list


        To:     PICLIST@MITVMA.MIT.EDU
        cc:
        Subject:        Re: Res: [PIC]: Need good tutorial on I/O


At 07:30 PM 3/7/2003 -0300, Jonnathan Partamian wrote:

>What kind of I/O do you want?
>If it's simple I/O: PIC has many I/O pins witch are in groups called
PORTs,

....(snip, snip)...



>Hope I could help, God bless you all,
>
>Jonnathan Partamian

Well, yes, you did help.  Thanks.  I've been slogging my way  through the
data sheet on the 18F452, trying to understand how it works, and had hit a
snag on the input-output.  So your description of what is going on did
indeed clear that up.  (Now on to watchdog timers.....)

I had thought that being an old-timer (in every sense of the word) in the
computer arena would make mastering the PIC a piece of cake.  Not!!  I've
been programming for many, many years, and in some ways this is an
obstacle
rather than a help.  The reason is because the PIC data sheets use
familiar
words but use them in a different sense than I am used to.  Kind of a
parallel universe.  :-)   But once it sank in that the thing just has a
run
of the mill accumulator (called, for some weird reason, a "w register",
and
that they call memory locations "registers", but that the memory locations
are not just ordinary memory locations because  they connect to other
things.....

But it is fascinating and I'm really getting hooked on it.  Kind of
strange, after programming multi-million dollar mainframes for so many
years, that I am now excited about getting a $10 chip to light up an LED.
:-)

John

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