RVP902 includes built-in utilities such as Setup, dspx, and Ascope. See IRIS and RDA
Utilities Guide.
Because RVP902 can only have one program controlling it at a time, using a local program
such as dspx blocks network access.
3.2.4 RVP902 Socket Protocol
The socket interface supports the commands in 8. Host Computer Commands (page 235).
All messages going both ways consist at the lowest level of an 8-character decimal ASCII
number, followed by a block of data. The decimal number indicates how many bytes follow.
Generally, all data transfers are initiated by the host computer by sending a block of data,
consisting of a command word followed by the | character, followed by optional data.
It responds to all commands with either an Ack|, indicating acknowledgment that the
command was OK, or Nak|, indicating that there was an error. For Nak|, the reply always
includes a string indicating what the error was. For Ack, there is optional data following.
On initial socket connection request DspExport provides a response of either Nak|,
indicating the connection failed and why, or Ack|, followed by some connection information.
TheAck| string is in the form of name/value pairs, for example:
Ack|CanCompress=1,Model=RVP900,Version=7.32
Your program can evaluate, or ignore, these keywords. CanCompress=1 indicates that the
DspExport computer supports compression. The host computer can then choose to use
compression. When you
first connect, you are in the "info only" mode. This means that the
server only responds to INFO and OPEN commands.
DspExport supports the following commands:
• Read Command (READ)
• Write Command (WRIT)
• Read Status Command (STAT)
• Set Information Command (INFO)
• Read data available command (RDAV)
• Open the connection for I/O (OPEN)
Table 6 Socket Protocol Commands
Command Example
Read
(READ)
Example: READ|100| means read 100 bytes from the RVP900.
Since the RVP900 interface is a 16-bit word interface, these read sizes should
always be even.
It always replies with a Ack| followed by 100 bytes of binary data, or with a
Nak|, meaning there can be no partial reads.
RVP900 User Guide M211322EN-J
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