Hardware and Software
for Embedded Graphics
LCD controller data
sheets can be hard to track down, but the following links may
send you in the right direction.
Controller/Module Data Sheets site maintained by Jeff Sampson
is a good source of data sheets for many LCD graphics controllers.
Graphic LCD info page provides more LCD data.
If you are interested
in the Epsom SED13xx series of graphics controllers (gray-scale
and color) then check out http://www.erd.epson.com/vdc/html/products.htm
If you are using
HD44780 based text LCD displays you might be interested these
For graphics LCDs
the Toshiba T6963 controller is discussed in Ed Lansinger's
Companion Web Site
to "A Lightweight C++ Library for Embedded LCDs".
Limited .pdf Data sheets
for Yamaha's range of controllers are available at http://www.yamahayst.com/lsi/products/graphics.htm
Yamaha screens http://www.hitachi-eu.com/hel/ecg/products/displays/index.htm
- link describing Hitachi screens and some application notes on
interfacing them to T6963C, the HD61830 controller and directly
driving a screen from a Super-H processor.
and related products are available from 3M,
International Inc. and Carroll
There is a good article
describing ways of interfacing to a resistive touchscreen
available at http://www.jameco.com/Jameco/images/cc-images/dahlin114.pdf
A project describing
the use of PIC and the STV5730A to do On-Screen Display for subtitling
a video (PAL or NTSC) signal: http://www.stv5730A.co.uk/
For standard VGA controllers
(formerly Chips and Technologies) is worth a look, though most
of the information on their site is geared towards the PC architecture,
and not the embedded developer. However, from what I have heard,
they are the best bet for embedded developers looking for chip
sets if you do decide to go down the VGA route.
A very impressive
list of semiconductor manufacturers can be found on Gray's
LCD DISPLAY VENDORS
Niall Murphy reviewed
a number of Graphics
Libraries for Embedded Systems for Embedded
Systems Programming magazine, August 1997. The article reviews
the following products, as well as outlining the general features
that you should look for in a graphics library. Further information
for each of the reviewed products can be found by following the
link to the article
The article is now
quite out of date and a number of other products have come on
the market since that review. You may wish to browse some of the
Portable Embedded Graphics from Swellsoft
If you are interested
in high end graphics then it may be worth considering OpenGL.
The Mesa 3-D library
is an Open Source library with an OpenGL compatible API
which has been ported for some embedded applications by
am a big advocate of prototyping your user interface on
a PC, whether it is a graphical or non-graphical interface,
before committing to the final front panel design. I tend
to do my prototyping with Borland
C++ Builder, but there are a number of tools that specialize
in generating prototypes of embedded user interfaces. Some
include code generation, and allow the prototypes to be
deployed on the web. They are expensive, so you will only
be considering these tools if you think you will get value
out of them over several projects.
provide a prototyping tool called Rapid, which allows custom
front panels to be drawn, and their behavior can be defined
using hierarchical finite state machines. They also support
code generation to drive the interface.
provide a tool for prototyping the front panel of embedded
systems. See their web page for product info and a couple
of impressive demos including a mobile phone and a camera.
The demos run over the web, as can any prototypes you build
using their tool.
Prototypes provide a tool called VAPS,
which allows rapid prototyping of GUI's, as distinct from
custom front panels that Altia and Rapid support.