Serial Interface for LCD

C

CWatters

Guest
I know that many multi row LCD displays use the HD 4780 controller and that
there several interface boards available convert RS232 to HD4780 but... What
about simple single row displays? Is there a "standard" way to drive a
single row of eight 7 segment digits from a serial port? (Eg for outdoor
signs).

I could easily design my own interface but would like the option of being
able to buy a bigger commercial unit later if such a standard exists.
 
CWatters wrote:
I know that many multi row LCD displays use the HD 4780 controller and that
there several interface boards available convert RS232 to HD4780 but... What
about simple single row displays? Is there a "standard" way to drive a
single row of eight 7 segment digits from a serial port? (Eg for outdoor
signs).

I could easily design my own interface but would like the option of being
able to buy a bigger commercial unit later if such a standard exists.
--------------------------------
Click to expand...
Sure, easy, look at this:

http://ourworld.compuserve.com/homepages/Bill_Bowden/page3.htm#32bit_receiver

Just latch and pipe that to your displays.

-Steve
--
-Steve Walz rstevew@armory.com ftp://ftp.armory.com/pub/user/rstevew
Electronics Site!! 1000's of Files and Dirs!! With Schematics Galore!!
http://www.armory.com/~rstevew or http://www.armory.com/~rstevew/Public
 
Look at the Maxim MAX6954, it drives up to 16 digits 7-segments displays
through an SPI interface.

Cheers,

Robert Lacoste - ALCIOM : The mixed signals experts
http://www.alciom.com


"R. Steve Walz" <rstevew@armory.com> a écrit dans le message de
news:3F84FD4B.79A2@armory.com...
CWatters wrote:

I know that many multi row LCD displays use the HD 4780 controller and
that
there several interface boards available convert RS232 to HD4780 but...
What
about simple single row displays? Is there a "standard" way to drive a
single row of eight 7 segment digits from a serial port? (Eg for outdoor
signs).

I could easily design my own interface but would like the option of
being
able to buy a bigger commercial unit later if such a standard exists.
--------------------------------
Sure, easy, look at this:


http://ourworld.compuserve.com/homepages/Bill_Bowden/page3.htm#32bit_receiver

Just latch and pipe that to your displays.

-Steve
--
-Steve Walz rstevew@armory.com ftp://ftp.armory.com/pub/user/rstevew
Electronics Site!! 1000's of Files and Dirs!! With Schematics Galore!!
http://www.armory.com/~rstevew or http://www.armory.com/~rstevew/Public
Click to expand...
 
Hi Steve,

Thanks for the reply but what I was really trying to find out is..

Is there a standard for the serial interface protocol?

eg

<ESC> <Digit 1> <Digit 2>......etc

Looking round it would seem each manufacturer has their own protocol.


"R. Steve Walz" <rstevew@armory.com> wrote in message
news:3F84FD4B.79A2@armory.com...
CWatters wrote:

I know that many multi row LCD displays use the HD 4780 controller and
that
there several interface boards available convert RS232 to HD4780 but...
What
about simple single row displays? Is there a "standard" way to drive a
single row of eight 7 segment digits from a serial port? (Eg for outdoor
signs).

I could easily design my own interface but would like the option of
being
able to buy a bigger commercial unit later if such a standard exists.
--------------------------------
Sure, easy, look at this:


http://ourworld.compuserve.com/homepages/Bill_Bowden/page3.htm#32bit_receiver

Just latch and pipe that to your displays.

-Steve
--
-Steve Walz rstevew@armory.com ftp://ftp.armory.com/pub/user/rstevew
Electronics Site!! 1000's of Files and Dirs!! With Schematics Galore!!
http://www.armory.com/~rstevew or http://www.armory.com/~rstevew/Public
Click to expand...
 
Thanks but that's an LED display driver if I'm not mistaken.


"Robert Lacoste" <see.www.alciom.com.for.email.adress@nospam.com> wrote in
message news:3f8515a4$0$24673$7a628cd7@news.club-internet.fr...
Look at the Maxim MAX6954, it drives up to 16 digits 7-segments displays
through an SPI interface.

Cheers,

Robert Lacoste - ALCIOM : The mixed signals experts
http://www.alciom.com


"R. Steve Walz" <rstevew@armory.com> a écrit dans le message de
news:3F84FD4B.79A2@armory.com...
CWatters wrote:

I know that many multi row LCD displays use the HD 4780 controller and
that
there several interface boards available convert RS232 to HD4780
but...
What
about simple single row displays? Is there a "standard" way to drive a
single row of eight 7 segment digits from a serial port? (Eg for
outdoor
signs).

I could easily design my own interface but would like the option of
being
able to buy a bigger commercial unit later if such a standard exists.
--------------------------------
Sure, easy, look at this:



http://ourworld.compuserve.com/homepages/Bill_Bowden/page3.htm#32bit_receiver

Just latch and pipe that to your displays.

-Steve
--
-Steve Walz rstevew@armory.com ftp://ftp.armory.com/pub/user/rstevew
Electronics Site!! 1000's of Files and Dirs!! With Schematics Galore!!
http://www.armory.com/~rstevew or http://www.armory.com/~rstevew/Public
Click to expand...
 
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