pdi_open(3)                         CLIX                         pdi_open(3)



  NAME

    pdi_open - Opens a Processed Data Interface (PDI) port

  LIBRARY

    Intergraph Device Library (libix.a)

  SYNOPSIS

    #include <sys/xio/xerr.h>

    int pdi_open(
      int channel );

  PARAMETERS

    channel   An integer representing a PDI port

  DESCRIPTION

    The pdi_open() function opens the Processed Data Interface (PDI) port on
    the Image System Interface (ISI) board referenced by channel.  Only one
    process is allowed to open a PDI port 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.

  RETURN VALUES

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

  ERRORS

    The pdi_open() 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_BUSY]
           The specified channel is currently open by another 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.



  2/94 - Intergraph Corporation                                              1

  pdi_open(3)                         CLIX                         pdi_open(3)



  RELATED INFORMATION

    Functions:  xpdi(7)



















































  2                                              Intergraph Corporation - 2/94