Справочник Пользователя для Sun Microsystems S16A

Input and Output

S16A User’s Guide

14

EDT, Inc.  October, 1996

Get the output resolution of the S16A. Returns 16 or 20, reflecting the current driver setting for the output
channel.

int s16a_get_output_bits(S16aDev *s16a_p);

S16A device handle returned from s16a_open

Returns 16 or 20 on success; returns –1 if the ioctl driver call fails, and sets errno to indicate the problem.

Opens the specified S16A and sets up the device handle.

S16aDev *s16a_open(int unit, int channel, int output);

specifies the device unit number

specifies the analog I/O channel number: 0 or 1

specifies the direction: 1 means the output subdevice; 0 means the input subdevice

A handle of type

(S16aDev *)

, or

NULL

 if error. If an error occurs, check the errno global variable for the

error number.