08-02-2010
how to write data into a device file?
Hi,
I am working in device drivers. I am new to device drivers. i have invoked chardev.c.
the driver is insmoded. now i want to write something into this and i want to look what i have written. but i don't know how to write and see. please help me
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UEP(4) BSD Kernel Interfaces Manual UEP(4)
NAME
uep -- eGalax touchscreen driver
SYNOPSIS
To compile this driver into the kernel, place the following lines into your kernel configuration file:
device uep
device usb
Alternatively, to load the driver as a module at boot time, place the following line in loader.conf(5):
uep_load="YES"
DESCRIPTION
The uep driver provides support for the eGalax onscreen touch panels.
The driver is stub. It just probes and attaches to USB device, creates device entry and feeds reassembled packets from the hardware to it.
To get mouse working in X(7), one needs to install ports/x11-drivers/xf86-input-egalax.
FILES
uep creates a blocking pseudo-device file, /dev/uep0.
SEE ALSO
usb(4), loader.conf(5), xorg.conf(5) (ports/x11/xorg), egalax(4) (ports/x11-drivers/xf86-input-egalax).
AUTHORS
The uep driver was written by Gleb Smirnoff <glebius@FreeBSD.org>.
BUGS
uep can't act like sysmouse(4), since the latter does not support absolute motion events.
BSD
May 25, 2010 BSD