Got my first question. Using LCDs

Archiver

I have a 16x1 PARALLEL LCD display I got from Jameco when I got some
PICs. I know you can use serial LCDs but can I use this? BTW, I am
already having fun with this thing!

-Allan

Archiver

At 05:54 AM 11/7/2002 +0000, you wrote:
>I have a 16x1 PARALLEL LCD display I got from Jameco when I got some
>PICs. I know you can use serial LCDs but can I use this? BTW, I am
>already having fun with this thing!
>
>-Allan
Hi Allan -

You CAN use it, but as you will quickly see when you begin to lay out the
connections, parallel devices eat pins like crazy. Unlike PICs where you
can just move up to a larger chip, the Stamps are relatively fixed in the
number of ports available. Personally, I view this as a challenge, and
not as a restriction.

The largest Stamp (BS2P) offers the LCDOUT command. Take a look in the
Stamp manual around page 170 where it speaks about the 7 pins which are
used for this command.

Regards,

Bruce Bates


>To UNSUBSCRIBE, just send mail to:
> basicstamps-unsubscribe@yahoogroups.com
>from the same email address that you subscribed. Text in the Subject and
>Body of the message will be ignored.
>
>
>Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/

Archiver

I have a few examples on my site if you want to take a look (assuming it's a
BS2 you are using?).
http://www.lennard.net.nz/
click on circuit ideas, then under displays click on "Driving an Hitachi
HD44780 based LCD display".

These examples are for 2 x 20 displays, but are easily modified for 2 x 16,
4 x 20, or 1 x 16. They also show how to reduce required pins from the
basic stamp using a SIPO or I2C device (very easy in both cases).

cheers,

Ben, Wellington, New Zealand.

--
http://www.lennard.net.nz/
Ben Lennard, NCEE, Dip EE

Electronics R&D

Hm: +64 4 972 7567
Mb: +64 21 536 627
87 Spencer Street
Crofton Downs
Wellington
New Zealand

"To the optimist, the glass is half full. To the pessimist, the glass is
half empty. To the engineer, the glass is twice as big as it needs to be."

No animals were harmed in the transmission of this email, although the
Dog next door is living on borrowed time, let me tell you! Those of you
with an overwhelming fear of the unknown will be gratified to learn that
there is no hidden message revealed by reading this warning backwards.




> From: "Allan" <hot_wired_99@y...>
> Reply-To: basicstamps@yahoogroups.com
> Date: Thu, 07 Nov 2002 05:54:57 -0000
> To: basicstamps@yahoogroups.com
> Subject: [noparse][[/noparse]basicstamps] Got my first question. Using LCDs
>
> I have a 16x1 PARALLEL LCD display I got from Jameco when I got some
> PICs. I know you can use serial LCDs but can I use this? BTW, I am
> already having fun with this thing!
>
> -Allan
>
>
> To UNSUBSCRIBE, just send mail to:
> basicstamps-unsubscribe@yahoogroups.com
> from the same email address that you subscribed. Text in the Subject and Body
> of the message will be ignored.
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>

Archiver

I use E-lab's EDE702 IC (found at Jameco). This chip is so easy to
use. It interfaces with almost all parallel LCD displays. To write
data to the display you just send it a serial signal at 2400 or 9600
baud. You just use one pin. Very nice.

--- In basicstamps@y..., "Allan" <hot_wired_99@y...> wrote:
> I have a 16x1 PARALLEL LCD display I got from Jameco when I got
some
> PICs. I know you can use serial LCDs but can I use this? BTW, I am
> already having fun with this thing!
>
> -Allan