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robots motion using optical mouse

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piyush manavar

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hi
i am working in robotic.
now i want to develop a robot.
in my project i want to use optical mouse to detect the motion of robots.
so can any body give me detail of optical mouse communication protocol. so i can directly interface it with my bot. (i know the working principal of optical mouse ).

if any other idea about this then please reply me


thanks

Regards
Piyush Manavar
 

This has been attempted before, but I have to warn you of one limitation of using a mouse laser for navigation. Mice can detect movement in the x and y direction, but they cannot detect rotation.

Take a mouse that is pointing up and rotate it by 90 degrees to the right, you'll notice it barely moves on the screen, ideally not at all. Now move it forward. You'll see the cursor go up rather than to the right. Why? Because the mouse does not detect rotation. Thus a mouse needs to be combined with a gyroscope or secondary mouse for navigation purposes.
 
you are right
i am also using gyroscope for rotation.
but right now i want the protocol to communicate with mouse.
what type of signal it gives while moving in X-Y motion???.


Thanks

Regards
Piyush Manavar
 

Not sure on the protocol, but you could try and reverse engineer it if it's not out there. Try a packet sniffer program that sniffs the communications on your usb port and see what comes up when you move the mouse around.

If your system is running an OS that can run mouse drivers i.e. Windows or Linux, you don't need to know the protocol, only how to access the API or services I believe (something where you can just grab x and y data). If you are trying to connect a usb device to a serial port on an OS less micro-controller than you probably will need to reinvent the wheel and dive into the protocol.
 
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