AD(4)                                                                    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 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 dif‐
       ferent 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.



4.2 Berkeley Distribution        May 15, 1985                            AD(4)