Help with PS2 and PIC16F877a interface

[thurmc]

I am creating a mapping robot for a final project in a class and I am having some trouble learning how to interface the PIC16F877A with a PS2 mouse. Basically what I am trying to do is find out how much the mouse has moved in the X-Y position and read this into the PIC. I was wondering if someone could point me in the right direction on how to do this? I found a few example codes but they are for modeling mice instead of reading from them. Also: Can you set this up using the RS-232 communication? The protocols seem very similar between PS2 and RS 232.

 

[3v0]

PIC - PS/2 mouse interfacing and communication

 

[thurmc]

Thanks for the link but I don't speak Italian and I was hoping for a better idea of how to accomplish this that doesn't involve copying another person's program. Anyone have any advice?

 

[Nigel Goodwin]

Thanks for the link but I don't speak Italian and I was hoping for a better idea of how to accomplish this that doesn't involve copying another person's program. Anyone have any advice?

Then google for "PS2 serial protocol" and write your own.

 

[thedemri]

Hi
I have built a robot that work with two PS2 mouse with pic 16f877

**broken link removed**

clip:
**broken link removed**

some more info :
**broken link removed**

I have implemented the PS2 protocol based on this sites :
**broken link removed**

**broken link removed**

but if it's not a must to work with the PS2 protocol , you can work directly with the mouse chip and it is much simpler :

Sprites mods - Optical mouse-cam - Optical mouse cam


There is a ready chip that can help you
PAK-VI

TheDemri

 

[thurmc]

Thanks for your help thedemri those sites are extremely helpful

 

[coder7]

well i have a problm in communicating with ps/2 mouse using pic 16f877a as soon i attach ps/2 cable to pc and boot my sys.PC got stuck after showing BIOS window
so pls help............

 

[Sceadwian]

coder, if you have a problem start your own thread, don't post in someone elses.