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无线传感器网络操作系统源代码

Package: net.tinyos.schema 

Description: Package to manage the schemas
of motes that include the MOTEINFO layer and
use a schema (see nest/apps/basic_db_mote for an example mote) 

Author: Sam Madden ([e-mail])

This package allows mote-schemas to be parsed in Java.  Mote schemas
represent the capabilities of motes, including:
  1) number and types of sensors
  2) code revision

Schemas are sent and received via a number of AM messages, as follows:

kSCHEMA_MESSAGE:         A message containing schema information for a single field
	                 of a mote.  See Schema.java for a description of the contents
	                 of this message.

kVERSION_MESSAGE:        A message containing version information for a mote.  Version
	                 is meant to indicate the sensor program type and revision; it
	                 consists of four bytes of information, and is specified in
	                 tos/include/version.h.  See tos/shared/MOTEINFO.c for information
	                 about how motes can incorporate versions.

kINFO_MESSAGE:           A message requesting version or schema information from a mote with
                         the MOTEINFO component included.

kFIELD_MESSAGE:          A message requesting the value of a sensor field from a mote with the
	                 MOTEINFO component.

kFIELD_REPLY_MESSAGE:    The value of a field sent by a mote in response to a kFIELD_MESSAGE.


Executables: none

Test Programs: MoteDBGUI.java, net.tinyos.amhandler.AMTest

net.tinyos.schema.MoteDBGUI.java
        usage: java net.tinyos.schema.MoteDBGUI [COM1 | COM2 | COM3]
        descr: Broadcasts requests for mote schemas, shows responding
	       motes in the a simple GUI.  Polls motes for sensor readings
	       and shows those too.

Classes: 

Schema.java

Java class representing a mote schema.  Given a string from a kSCHEMA_MESSAGE, returns
a data structure containing one or more SchemaFields which can be queried for schema
information.

SchemaField.java

Java class representing a single field of the mote schema.

SensorTracker.java

Java class which polls for motes via a kSCHEMA_REQUEST_MESSAGE and builds a vector
of Schemas which represent all motes which respond to that message.  Also periodically
polls those motes for the values of their sensors.