Keyboard

[uaefame]

Hello,

I am trying to program a keyboard to send specific signal to the computer for example

spacebar 2 second
up button 3 second
H button 1 second
down butoon 2 second

Something like that, I decided to use microcontroller to program the keyboard to perform this certain task.

I want to use the microcontroller to hit these buttons, while the keyboard is connected to the computer. I hope i explain it well.

Please give me clue how to start, where to look, if any project similar to what i am making is already done please point it to me.

Thanks in advance

I know i am not so popular here, I committed to have a clean start!

 

[blueroomelectronics]

You could just do that with software on your OS
**broken link removed**

 

[uaefame]

I was thinking of using a microcontroller...
your idea is being tested but i wanted a motivation to learn microcontroller...

I am still reading about 16F84, not much progress but ya i will keep going...

 

[uaefame]

I am looking for a way to control a keyboard using microcontroller!

anyone know an interference that might help or might work

where shall i start where shall i gather information?

 

[ericgibbs]

I am looking for a way to control a keyboard using microcontroller!

anyone know an interference that might help or might work

where shall i start where shall i gather information?

hi,
Look at Nigels tutorials link at the bottom of this post.

 

[v1r05]

you could use something like this, it features an avr controller that connects to the usb port as a HID keyboard and start annoying people by switching on the caps-lock.

it could be easily modified to your purpos
Stealth USB CapsLocker | macetech.com

 

[uaefame]

Hello eric, the tutorial site that you posted only shows tutorial about PIC. not circuit diagram how to interface a keyboard with a pic. even though the world keyboard is not mentioned i tried using control f to find any related topic nothing much.

HEllo, v1ro5 i tried entering the site all the picture is block the content look good i might read it but i can't see picture.

THANKS EVERYONE FOR REPLYING

 

[ArtemisGoldfish]

PS/2, as an interface, looks ungodly simple. I'd probably use a 16F87X/A series chip just because it has the USART and/or MSSP interface so you wouldn't have to use software serial emulation, but that's just me. (The 16F876A is available from Microchip for $4 in quantities 1 and up) PS/2 is bidirectional synchronous with the device providing the clock pulse, so you could use the Baud Rate Generator for some stability.

**broken link removed**

There ya go. Just pay it forward.

 

[blueroomelectronics]

The PS2 protocol won't work with SPI, I2C or the USART so you might as well use any PIC. I think it's an 11bit packet, easy enough to find PS2 and PIC programs on the web.

 

[arhi]

if you get mikroC (mikroElektronika | Solutions for the embedded systems) they have library for reading key's from keyboard and example how to use 18f4550 as usb keyboard/mouse ..

source code to read ps2 keyb from hitech c **broken link removed**

here you have schematic + source for atmega8 that receive IR commands and simulate keypress on the computer : PS/2 Keyboard IR Receiver

complete explanation of how keyboard work together with source code example (For motorolla)
**broken link removed**

full keyboard replacement project (alternate input) for 80196:
**broken link removed**

full keyboard replacement project (alternate input) for PIC16C63
**broken link removed**

so ...you have full theory on how keyboard communicate over ps/2 port, you have examples how to read keyboard from uC, you have examples how to behave like keyboard and send key presses to computer via ps/2; all you now need to do is to understand how it works merge the projects and get exactly what you need.