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Boards that support asynchronous commands on the AO subdevice (those that have an AO FIFO) have code to support output to both channels on each scan trigger (if both channels are in the channel list). However, the AO subdevice initialization code in cb_pcidas_attach() neglected to set the subdevice's 'len_chanlist' member, leaving it set to 0. The core Comedi code changes it to 1, but that limits the command's channel list to a single channel. Change the initialization code to set it to the number of AO channels for boards that support AO commands. Signed-off-by: Ian Abbott <firstname.lastname@example.org>
COMEDI The Linux Control and Measurement Device Interface David Schleef <email@example.com> * About Comedi: Comedi is a collection of drivers for data acquisition hardware. These drivers work with Linux, and also with Linux combined with the real-time extensions RTAI and RTLinux. The Comedi core, which ties all the driver together, allows applications to be written that are completely hardware independent. Comedi supports a variety of data acquisition hardware; an incomplete list can be found in Documentation/comedi/drivers.txt. This distribution contains just the Comedi kernel modules. You will almost certainly also want to download Comedilib, which is a user space library, a few utilities, and some example programs. * Installation: For installation instructions, look at the file INSTALL. * Mailing List: Questions about Comedi should be sent to the Comedi mailing list, <firstname.lastname@example.org>. It is necessary to join the group before posting (see below). It is also possible to post to the list using the web interface (see below). Mailing the maintainer directly is always acceptable, but since the mailing list is archived and questions are often answered more quickly by others, the mailing list is preferred. To subscribe to and unsubscribe from the mailing list, or to read or post messages via the web interface, go to <http://groups.google.com/group/comedi_list>. Alternatively, you can send a blank email to <email@example.com> to subscribe, or to <firstname.lastname@example.org> to unsubscribe (making sure the "From:" email address matches the address you originally subscribed with!). Traffic on the list is light, and mainly questions/answers about comedi installation, bugs, and programming. General questions about data acquisition are also welcome. * More Information: Comedi also has a web page at <http://www.comedi.org/> from where updated versions may be downloaded. Often bugfixes and new features that are not in the current release can be found in the Git repository. Git snapshots can be created automatically at <https://github.com/Linux-Comedi/comedi/tarball/master>. The Git repository can be accessed anonymously using: git clone https://github.com/Linux-Comedi/comedi.git The Git repository was previously hosted at comedi.org. A previously cloned repository may need its URL updating to the current repository on github.com as follows: cd /path/to/comedi git remote set-url origin https://github.com/Linux-Comedi/comedi.git Comedi may be freely distributed and modified in accordance with the GNU General Public License. The person behind all this misspelled humor is David Schleef <email@example.com>.