---
name: "comedi_config"
section: "8"
platform: "linux"
package: "libcomedi0t64"
version: "0.11.0+5-1.3+b1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/comedi_config"
---

# comedi\_config(8)

COMEDI configuration utility

## NAME

comedi\_config - COMEDI configuration utility

## SYNOPSIS

**comedi\_config** \[*OPTION*\]... /dev/comedi*N* *driver* \[*param1*\[,*param2*\]...\]\
 **comedi\_config** \[*OPTION*\]... -r /dev/comedi*N*\

## DESCRIPTION

**comedi\_config** is used to configure **comedi** drivers. You must have **comedi** support compiled into your kernel or loaded as a separate module in order to use this utility. Each control and measurement device is associated with a particular **comedi** device file **/dev/comedi**N, where N is 0,1,2,3, etc. **comedi\_config** allows you to associate a particular driver and device with a **comedi** device file, and also configure driver parameters for the particular device.

**comedi\_config** can be used with optional parameters which are driver dependent.  Parameters are specified by comma-delimited list of integers.  The integers may be expressed as decimal, hexadecimal (starting with 0x) or octal (stating with 0).  In addition, a parameter may be left blank, indicating 0.  PCI-based devices typically require no parameters, although some allow you to specify the bus and slot of the card to configure as the first two parameters. ISA-based devices typically use the first and second parameters to indicate I/O base address and interrupt level.

More information about the parameters required by individual drivers can be found in the **comedi** documentation, in the file **drivers.txt**, and in the Kernel drivers ⟨http://www.comedi.org/doc/lowleveldrivers.html⟩ section of the **Comedilib** manual ⟨http://www.comedi.org/doc/index.html⟩.

## OPTIONS

**comedi\_config** recognizes the following options:

- **-q**, **--quiet**

  Don't print output while running.

- **-v**, **--verbose**

  Print verbose output while running.

- **-V**, **--version**

  Print version number and exit.

- **-r**, **--remove**

  Remove (unconfigure) previously configured device.

- **--read-buffer** *size*

  Set read buffer size to *size* kilobytes.  The default size is 64k.

- **--write-buffer** *size*

  Set write buffer size to *size* kilobytes.  The default size is 64k.

- **--subdevice-buffer** *num*,*size*\[,*num*,*size*\]...

  Set subdevice *num* buffer size to *size* kilobytes.  More than one *num*,*size* pair may be specified, and the option may be used several times.

- **-i**, **--init-data**, **--init-data0** *file*

  Upload initialization data (typically firmware) from *file* to board.

- **--init-data1** *file*

  - **--init-data2** *file*

  - **--init-data3** *file*

  Some drivers require more than one file for initialization  data.  Use these options to specify additional initialization data files.   See the driver-specific documentation for further details.

## CONFIGURATION FILE

\[This section has not been implemented yet.\]

A list of device configurations can be put into the file **/etc/comedi.conf**.  This file takes the form:

```
<device> <driver> <param1>,<param2>,...
```

These configurations will be read and performed when the switch **-a** is used.  This is potentially useful when run from an initialization script.

## EXAMPLES

A National Instruments PCI-MIO E series board can be configured to use /dev/comedi0 using the command:

```
comedi_config /dev/comedi0 ni_pcimio
```

A National Instruments AT-MIO E series board can be configured to use /dev/comedi3 using the command:

```
comedi_config /dev/comedi3 ni_atmio 0x220,3
```

This tells the driver that the board is configured for I/O base 0x220 and IRQ 3.

## ADDITIONAL INFORMATION

Additional documentation may be found in the Configuration section ⟨http://www.comedi.org/doc/install.html⟩ of the **Comedilib** manual ⟨http://www.comedi.org/doc/index.html⟩.

## SEE ALSO

[**comedi**(7)](/comedi/7.md)

## VERSION

0\.11.x

## AUTHOR

David Schleef ⟨ds@schleef.org⟩