AD

Section: Devices and Network Interfaces (4)
Updated: vax
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BSD mandoc
BSD 4.2  

NAME

ad - Data Translation A/D converter  

SYNOPSIS

device ad0 at uba0 csr 0170400 vector adintr  

DESCRIPTION

The ad driver provides an interface to the Data Translation A/D converter. This is not a real-time driver, but merely allows the user process to sample the board's channels one at a time. Each minor device selects a different A/D board.

The driver communicates to a user process by means of ioctl(2)Nss. The AD_CHAN ioctl selects which channel of the board to read. For example,

chan = 5;
ioctl(fd, AD_CHAN, &chan);

selects channel 5. The AD_READ ioctl(2) actually reads the data and returns it to the user process. An example is

ioctl(fd, AD_READ, &data);
 

FILES

/dev/ad

 

DIAGNOSTICS

None.  

HISTORY

The driver appeared in BSD 4.1


 

Index

NAME
SYNOPSIS
DESCRIPTION
FILES
DIAGNOSTICS
HISTORY

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Time: 06:48:45 GMT, May 19, 2025