LCD Graphics Primitives Library*

Updated Jun. 25: added 'display on' code, minor fixes *
* Updated Jul. 13: character print routines will overwrite 'old' information corrrectly in 'set' mode

This library is an enhanced re-arrangement and somewhat 'generalized' compilation of modules I've written over the past two years for our designs, following Mr. Kalle's "Nokia 7110 LCD graphics library V2" example.

Currently included is a device driver for the SED136x/15xx family (w. parallel interface). Other compatible controllers are e.g. HD61202/KS0107 (8 page organization), KS0713 etc.

Functions currently included are:
- Line (with clear/set/invert)
- Rectangle (outline/filled w. clear/set/invert)
- Circle (outline/filled w. clear/set/invert)
- Ellipse (outline/filled w. clear/set/invert)
- Polygon/Area Seed Fill(s) (pixel set only)
- Bitmap (Icon/Picture w. clear/set/invert)
- Single Pixel R/W (w. clear/set/invert)
- Single Character (w. clear/set/invert)
- ASCIIZ String (w. clear/set/invert)
- Print BCD as ASCII (w. clear/set/invert)
- Print HEX as ASCII (w. clear/set/invert)
- Clear/Fill/Invert Screen
- Write Frame Buffer to Display (device driver for 2xSED1520, 120x32 pix)
- Three fonts (8x8 bold, 8x8 thin, 5x6 small, full IBM extended character set (code page 437)

Link to Site: http://www.avrfreaks.net/index.php?module=...em_type=project

Graphics Primitives Functions Library for ATMEL AVR

Target: AVRs with hardware multiplier & internal RAM

Graphics controller hardware: 2x SED1520, described in "G_LCD_Swap"
Note: Routines are easily adaptable to similar controllers (cf. below)

The routines are primarily optimized for speed, especially the "draw
character" and "filled primitive" (circle, rectangle, ellipse etc.)
functions are typically 3 to 10 times faster than compiler generated code.

The functions preserve all registers used, so they can easily be embedded
as asm-inline in 'high-level language' sources.

Note: maximum display (screen) size currently is 255x255. The functions
assume a 'vertically aligned' and 'paged' video/graphics memory
organisation (Epson SED136x, SED15xx family, Toshiba P90xx,
HD61202/KS0107, KS0713 etc.):

* List of functions:

Line (with clear/set/invert)
Rectangle (outline/filled w. clear/set/invert)
Circle (outline/filled w. clear/set/invert)
Ellipse (outline/filled w. clear/set/invert)
Polygon/Area Seed Fill(s) (pixel set only)
Bitmap (Icon/Picture w. clear/set/invert)
Single Pixel R/W (w. clear/set/invert)
Single Character (w. clear/set/invert)
ASCIIZ String (w. clear/set/invert)
Print BCD as ASCII (w. clear/set/invert)
Print HEX as ASCII (w. clear/set/invert)
Clear/Fill/Invert Screen
Write Frame Buffer to Display (device driver for 2xSED1520, 120x32 pix)

Three fonts (8x8 bold, 8x8 thin, 5x6 small, full IBM enxtended character
set (code page 437) included.

This library is an enhanced re-arrangement and somewhat 'generalized'
compilation of modules I've written over the past two years for our
designs.

I've included and adapted some code (Bresenham line, print BCD/Hex) from
Mr. Rolf Kalle's "Nokia 7110 LCD graphics library V2"; I've also
used some of his labels and other naming conventions as Mr. Kalle's
library actually provided the incentive to start this. By the way: in
"Nokia 7110 ..." you'll also find a device driver for an 8-page
96x64 organized serial display (SED 1565, used by the aforementioned
Nokia 7110).

I would highly appreciate any feedback from people who use the routines
presented here.

I'd also like to gather any additional graphics routines, bug fixes and
especially further device drivers and code adaptions for different HW
architectures you might happen to come up with into this archive.


Andreas Lenze
EDV-Systeme Lenze
Munich, Germany 2003
andreas.lenze@t-online.de