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Docs » Autodocs » parallel.device » PDCMD_SETPARAMS
SetParams -- change parameters for the parallel device
This command allows the caller to change the EOFMODE parameter for
the parallel port device. It will disallow changes if any reads or
writes are active or queued.
The PARB_EOFMODE bit of io_ParFlags controlls whether the
io_PTermArray is to be used as an additional termination criteria
for reads and writes. It may be set directly without a call to
SetParams, setting it here performs the additional service of
copying the PTermArray into the device default array which is used
as the initial array for subsequent device opens. The Shared bit
can be changed here, and overrides the current device access mode
set at OpenDevice time.
IO REQUEST
io_Message mn_ReplyPort initialized
io_Device preset by OpenDevice
io_Unit preset by OpenDevice
io_Command PDCMD_SETPARAMS (0A)
NOTE that the following fields of your IORequest
are filled by Open to reflect the parallel device's
current configuration.
io_PExtFlags must be set to zero, unless used
io_ParFlags see definition in parallel.i or parallel.h
NOTE that x00 yields exclusive access, PTermArray
inactive.
io_PTermArray ASCII descending-ordered 8-byte array of
termination characters. If less than 8 chars
used, fill out array w/lowest valid value.
Terminators are used only if EOFMODE bit of
io_Parflags is set. (e.g. x512F040303030303 )
This field is filled on OpenDevice only if the
EOFMODE bit is set.
io_Error -- if the SetParams succeded, then io_Error will be null.
if the SetParams failed, then io_Error will be non-zero.
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