StreamDevice: bi Records

Normal Operation

Depending on the format type, different record fields are used for output and input. The variable x stands for the written or read value.

DOUBLE format (e.g. %f):

Not allowed.

LONG format (e.g. %i):

Output: x=RVAL
Input: RVAL=x&MASK
MASK can be set be set in the record definition. Stream Device does not set it. If MASK==0, it is ignored (i.e. RVAL=x). The record sets VAL=(RVAL!=0), i.e. 1 if RVAL!=0 and 0 if RVAL==0.

ENUM format (e.g. %{):

Output: x=VAL
Input: VAL=(x!=0)

STRING format (e.g. %s):

Output: Depending on VAL, ZNAM or ONAM is written, i.e. x=VAL?ONAM:ZNAM.
Input: If input is equal to ZNAM or ONAM, VAL is set accordingly. Other input strings are not accepted.

Initialization

During initialization, the @init handler is executed, if present. All format converters work like in normal operation.

aai aao ai ao bo mbbi mbbo mbbiDirect mbboDirect longin longout stringin stringout waveform calcout scalcout

Dirk Zimoch, 2005