4.3BSD-UWisc/man/cat4/ad.4

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AD(4)               UNIX Programmer's Manual                AD(4)



NAME
     ad - Data Translation A/D converter

SYNOPSIS
     device ad0 at uba0 csr 0170400 vector adintr

DESCRIPTION
     _A_d provides the interface to the Data Translation A/D con-
     verter.  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
     ioctls.  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 actually reads the
     data and returns it to the user process.  An example is
          ioctl(fd, AD_READ, &data);

FILES
     /dev/ad

DIAGNOSTICS
     None.






























Printed 12/27/86          May 15, 1985                          1