Vaisala RVP900 - Pass Auxiliary Arguments to Opcodes (XARGS)

Data Number Description
17
Returns the nickname of the currently active HydroClass configuration.
The nickname can be used to label the possible customizations made to echo
identification settings in the dpolapp_*-band.conf file.
It is impractical to save all modified parameters as metadata. The string of 16 characters
is reported in a sequence of 8 words, each reporting 2 characters.
8.21 Pass Auxiliary Arguments to
Opcodes (XARGS)
XARGS provides a backward compatible mechanism for supplying additional (optional)
arguments to other opcodes. The command may be used freely in the RVP900 instruction
stream, even if the opcode being modified does not expect any optional arguments. XARGS
is a NOP in that case.
To supply optional arguments to another opcode OP, the XARGS command is
first executed
with the additional argument count encoded in its upper 11-bits. This is followed by the array
of 0 ... 2047 additional arguments. At this point the XARGS command finishes and the OP
command is fetched as the next instruction. OP executes normally, except that the additional
arguments from XARGS can be picked up after its own input list has been read to
completion.
XARGS aects only the opcode that immediately follows it. The entire list of optional
arguments is discarded after OP executes, even if OP did not use some or all of the list.
However, if OP is another XARGS command, then the additional arguments that it supplies
are appended to the
first set. In this way, XARGS can supply an arbitrarily large number of
additional arguments.
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
---------------------------------------------------------------
| | | | | | | | | | | | | | | | |
| Number of Additional Arguments N | 1 1 0 0 0 | Command
|--------------------------------------------|-------------------|
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
---------------------------------------------------------------
| | | | | | | | | | | | | | | | |
| First Additional Argument | Input 1
|-------------------|--------------------------------------------|
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