usbmouse, usbaudio, usbprint - Universal Serial Bus user level device drivers usb/usbmouse [ -fsv ] [ -a accel ] [ ctrlno n ]

usb/usbaudio [ -V ] [ -v volume ] [ -m mountpoint ] [ -s srvname ] [ ctrlno n ]

usb/usbprint

These programs implement support for specific USB device classes. They should be run after usbd (4) has had a chance to locate the devices in question and provide them with device addresses and minimal configuration. Dynamic handling of device insertion and removal is currently not supported. Usbmouse sends mouse events from a USB mouse to /dev/mousein where the Plan 9 kernel processes them like other mice.

Without arguments, it scans the USB status files to find a mouse and uses the first one it finds. A pair of numeric arguments overrides this search with a specific USB controller and device. The options are

-f Run usbmouse in foreground.

-s Use the scrollwheel.

-v Verbose mode.

-a " accel" Accelerate mouse movements.

Usbaudio configures and manages a usb audio device. It implements a file system, normally mounted in /dev , but this can be changed with the -m flag, with files volume , audioctl , audio , and audioin . The names volume and audio maintain backward compatibility with the soundblaster driver.

The -V flag (verbose) causes usbaudio to print information about the device on startup.

The -s flag specifies a name for a file descriptor to be posted in /srv .

Reading volume or audioctl yields the device's settings. The data format of volume is compatible with the soundblaster and produces something like

.EX audio out 65 treb out 0 bass out 0 speed out 44100

This file can be written using the same syntax. The keyword out may be omitted. Settings are given as percentages of the range, except for speed which is in Hz.

The file audioctl provides more information, using up to 6 columns of 12 characters each. From left to right, the fields are: "control name" , in or out , "current value" , "minimum value" , maximum , and resolution . There are 3, 5, or 6 columns present. Maxima and resolution are omitted when they are not available or not applicable. The resolution for speed is reported as 1 (one) if the sampling frequency is continuously variable. It is absent if it is settable at a fixed number of discrete values only.

When all values from audioctl have been read, a zero-sized buffer is returned (the usual end-of-file indication). A new read will then block until one of the settings changes and then report its new value.

The file audioctl can be written like volume .

Audio data is written to audio and read from audioin . The data format is little endian, samples ordered primarily by time and secondarily by channel. Samples occupy the minimum integral number of bytes. Read and write operations of arbitrary size are allowed.

Usbprint is a script that mounts a USB printer on /dev/lp .

To use a USB mouse and audio device, put the following in your profile (replace x with your favorite initial volume setting):

.EX if (test -r '#U'/usb0) { usb/usbd usb/usbmouse -a 2 usb/usbaudio -v x usb/usbprint }

Alternatively, just put usbstart in your profile.

/sys/src/cmd/usb usb (3), usbd (4) Usbaudio only works for certain audio devices. This is the list of devices known to work with usbaudio: