csi_open(3)                         CLIX                         csi_open(3)



  NAME

    csi_open - Opens a Command Status Interface (CSI) port

  LIBRARY

    Intergraph Device Library (libix.a)

  SYNOPSIS

    #include <sys/xio/xerr.h>

    int csi_open(
      int channel );

  PARAMETERS

    channel   An integer representing a Command Status Interface channel

  DESCRIPTION

    The csi_open() function opens the Command Status Interface (CSI) port on
    the Image System Interface (ISI) board referenced by channel.  Multiple
    processes can have the same CSI port open at a time.  Each ISI board in
    the system is represented by a channel number such that channel 0
    references the ISI board with the lowest Shared Resource Bus slot number
    of all ISI boards.

  RETURN VALUES

    Upon successful completion, a value of 0 is returned.  Otherwise, one of
    the following failure codes is returned.

  ERRORS

    The csi_open() function will fail if one of the following is true:

    [XIO_FAILURE]
           The system does not contain the driver needed to support this
           request.

    [ISI_REDUNDANT_REQ]
           The specified channel is currently open by this process.

    [ISI_CHANNEL_INVALID]
           The specified channel is beyond the maximum allowed.

    [ISI_CHANNEL_NOT_FOUND]
           The specified channel is not present in the system.

  RELATED INFORMATION



  2/94 - Intergraph Corporation                                              1

  csi_open(3)                         CLIX                         csi_open(3)



    Functions: csi_close(3)

    Files:  xcsi(7)



















































  2                                              Intergraph Corporation - 2/94