PIC C 20x4 ASCII LCD Terminal

with Vertical Scrolling

by Ted Rossin

PIC project: LcdTerminal.zip (just the source LcdTerminal.asm )
Schematic: LcdTerminal.jpeg
Device: 16F628

This project controls a 20 character by 4 line LCD display so that a simple serial RS-232 or TTL interface can treat the display as an ASCII terminal. The source code explains all the control characters and escape sequences to control scrolling the display, clearing the display, downloading custom characters and other features. The interface runs at 115K baud by using a software FIFO to handle input characters during a vertical scroll. A select pin is provided that allows the interface to run at 9600 baud.

Demo: CMeter.c

This is a demo program that uses a 16F873 and the LCD Terminal to implement a volt meter. The CLib.zip file is required as well as the HI-TECH PICC Lite compiler. See the Lego Robot Controller for details.

See also:

http://www.geocities.com/ted_rossin/Electronics/Pic/Pic.html#LCD%20Terminal Ted Rossin's web page.
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Code:

Comments:

file: /techref/microchip/io/dev/lcd/20x4scroll-tr.htm, 2KB, , updated: 2008/6/5 09:43, local time: 2008/11/22 01:51,

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LCD Front Panel Set: $8^.99!
- 2x16 LCD HD44780 controller
- 4 push buttons - 3 LEDs - 2x12 header