ULED(4) FreeBSD Kernel Interfaces Manual ULED(4)
NAME
uled - USB LED driver
SYNOPSIS
To compile this driver into the kernel, place the following lines into
your kernel configuration file:
device uled
device usb
Alternatively, to load the driver as a module at boot time, place the
following line in loader.conf(5):
uled_load="YES"
DESCRIPTION
The uled driver provides support for Dream Cheeky WebMail Notifier and
ThingM blink(1) notification LED.
Subsequently, the /dev/uled0 device can be used by userland applications.
IOCTLS
The following ioctl(2) commands can be performed on /dev/uled0, which are
defined in <dev/usb/uled_ioctl.h>:
ULED_GET_COLOR
The command returns LED colors with values for RGB. This
ioctl(2) takes the following structure:
struct uled_color {
uint8_t red;
uint8_t green;
uint8_t blue;
};
ULED_SET_COLOR
The command sets LED colors with values for RGB. It uses the
same structure as above.
FILES
/dev/uled0 blocking device node
SEE ALSO
ohci(4), uhci(4), usb(4)
AUTHORS
The uled driver was written by Kevin Lo <
[email protected]>.
FreeBSD 14.1-RELEASE-p8 March 31, 2017 FreeBSD 14.1-RELEASE-p8