On Sat, 6 Jun 2009, Anirudh Ramachandran wrote:
> Hi.
> A friend of mine needs to get actual data packets from a PS/2 mouse, for
> some trajectory analysis. He can read the movement packets sent by the mouse
> by reading /dev/psaux, but he also want to send bytes of data - commands -
> to the mouse so that he can get the information about sampling and
> resolution .
> Trying:
> $ echo "0xeb" | xdd -r > /dev/psaux
> doesn't help. Can anyone help us out please?
>
> Anirudh R
>
not sure what 'xdd' is. please let me know more about it !
As far as i know, the following holds good for mouse:
. the mouse device does not have refresh rate
. the mouse device cannot be overclocked
As far as the sampling rates are concerned
. for PS/2 mouse
- 40 Hz
- 60 Hz
- 200 Hz (maximum)
. for USB mouse
- 125 Hz
i've tweaked the mouse sampling rate only on my 'FreeBSD' laptop
using the moused(8) daemon.
An entry would be made in the /etc/rc.conf file
moused_ums0_flags="-F 200 -A 1.5,2.0 -a 0.7 -r high -V"
Please do revert with your observations.
thanks
Saifi.
