Re: [Amforth] LCD Graphics Driver and Graphics Library Available

[craig a. h. <ca...@gm...>]

FYI,

A new version of the library is now available which has support for text in
two different fonts.


On Tue, Nov 12, 2013 at 8:10 PM, craig and heather <ca...@gm...> wrote:

> Since reading the Hack-A-Day article on AmForth I knew I had to try
> running Forth on an Arduino. Thanks to the good folks on this mailing list
> I quickly got AmForth up and running on an Arduino Uno board and started to
> look around for a project to use this technology on. I hadn't used Forth in
> years but have a fondness for it that is hard to explain. I had previously
> used Forth at JPL for testing of the Galileo spacecraft data system, at
> Rolm for testing PBX's and PBX components and a little at Sun Microsystems
> which used Forth as a bootloader for most of their Solaris based computers.
>
> I decided to use AmForth to build a device driver and graphics library for
> a Sainsmart 3.2" LCD display that I previously used on another project (see
> the Contemplator article in Nuts and Volts magazine Dec 2012). In the hope
> this code might be useful to the Forth community I have made the code
> freely available here:
>
> http://www.craigandheather.net/misc/Lindley_AmForth_LCD_Driver.zip
>
> You are welcome to use this code anyway you want. If you use it for a cool
> project I would like to hear about it. My email address is:
> ca...@gm....
>
> This code runs only an an Arduino Uno but could be easily modified to run
> on other Arduino's. To use the this LCD display with an Arduino Uno
> requires soldering 24 wires between the boards. Also, because the 16 bit
> interface used between the boards requires every I/O pin the Arduino Uno
> has, the touch screen controller and the memory card interface on the LCD
> display are unavailable.
>
> The code consists of the following files four Forth files:
>
> ssd1289.frt
>    This is a device driver for the display which uses the ssd1289 LCD
> controller chip
>
> ssd1289Graphics.frt
>   This is the graphics library with functions for drawing: pixels,
> horizontal lines, vertical lines,
>   regular lines, rectangles, filled rectangles, circles and filled circles
>
> utils.frt
>   This file contains various functions for case statements, random
> numbers, sin function and various
>   color space conversion and color palette functions.
>
> demo.frt
>   This file contains various demos of the graphics functions.
>   Run the "demo" word to see all of the graphic examples
>
> You must have postpone.frt and marker.frt loaded before attempting to load
> the above files. Also, the files must be loaded in the order shown.
>
> This code works well except for flickering when doing a lot of display
> updates. I will be looking into this issue and will update the zip file
> with any changes I make.
>
> NOTE: my Forth skills are a bit rusty so some of the code is sub optimal.
> If any of you rewrite the code, please send me the changes.
>
> Enjoy,
>
> Craig Lindley
>
>
> --
> Craig Lindley
>
> If you’re one in a million, there are now seven thousand people exactly
> like you.
>



-- 
Craig Lindley / Heather Hubbard

New Recordings: craigandheather.net/cnmpage.html
Latest CD: craigandheather.net/songsilike2013cd.html

Personal Website: craigandheather.net
Business Website: clockwork.craigandheather.net
Phone: (719) 495-1873
Cell: (719) 502-7925

If you’re one in a million, there are now seven thousand people exactly
like you.