PS2 mouseInfo.status bits

[MHz]

Using the Potter PS2 lib:

1. It seems to me that only some other mouse events like left / right click or mouse movement trigger the cumulative scroll position (CS) update.

2. Decoding the mouseInfo.status bits from right to left:
   left button click
   right bitton click
   middle (scroll wheel) click
   always on
   next two bits
   11 OR 10 combined and therefore some what confusing + / - x and y movement status

To get the status (-change) you have to poll. In some situations it might be better to get an interrupt. Is this possible?

Where can I look for more information. I'm not so familar with classes, methodes ...

[system]

I've done PS/2 before, but I'm not familiar with the Potter PS/2 library. Here's what I did when I programmed a PS/2 mouse, and maybe you can apply it to what you're doing:

• Go to http://www.computer-engineering.org/ps2mouse/ and look at the Movement Data Packet
• Configure the clock and data lines as digital inputs
• Trigger an interrupt on the rising edge of the clock line
• Read data on the positive edge of the clock (scroll down to see the waveforms at http://www.computer-engineering.org/ps2protocol/)

Let me know if you need any clarification.

[MHz]

Hi Zach,
thank you for the in deep reply. It helps a lot. Thanks to your impressiv documentation I understand all the mouseInfo.status bits - great!

regards MHz

@ author of the ps2 lib: update of the CS differs from other cummulative values. Is this volitional?