SX Microcontroller based Keyboard IO

PC Keyboard interface / tester

by George F. Hotz

Hello, I'm George Hotz. Here is my keyboard-lcd interface. (Yes, it works
for me)

Thank you for hosting these contests.

Reads PC keyboards and displays Scan code or decoded ASCII to an LCD.

The connections are as follows:

• RA.0 = Clock of keyboard
• RA.1 = Data of keyboard
• RA.2 = lcd_RW
• RA.3 = lcd_e
• RB.4 - RB.7 = Pins 4-7 of the LCD, respectivly
• RB.0 = lcd_RS

It uses the SX Key/Blitz to program it, and runs using the internal 4mhz oscillator

Source with scan code display

Source with decoded ASCII display

Source which prints the keyboard keys to the LCD

Entered in the Embedded Starter contest June 2002

Questions:

• tcmart@gmail.com asks:

  hi,
  can u have a look at http://www.artlebedev.com/ and tell me if you can develop the similar thing but the display on key 'll be controlled by server/servers not by user.
  wait for ur reply