FtspLpl
所属分类：人工智能/神经网络/深度学习
开发工具：C/C++
文件大小：8KB
下载次数：64
上传日期：2010-04-17 05:54:37
上 传 者：
maoyuexin
说明： 无线传感网络时间同步FTSP protocol. 支持LOW POWER LISTENING。 将精度改为30us， 支持TMOTE,IRIS。
(Wireless sensor network time synchronization FTSP protocol. Support LOW POWER LISTENING. The accuracy to 30us, support TMOTE, IRIS.)
文件列表:
FtspLpl\FtspDataLogger.py (1121, 2010-02-22)
FtspLpl\Makefile (346, 2010-02-22)
FtspLpl\TestFtsp.h (1699, 2010-02-22)
FtspLpl\TestFtspAppC.nc (2203, 2010-02-22)
FtspLpl\TestFtspC.nc (4309, 2010-02-22)
FtspLpl\TestFtspMsg.py (17994, 2010-02-22)
FtspLpl (0, 2010-04-06)
First, program several nodes with this TestFtsp application. In addition,
you will need one TinyOS Basestation that listens for messages, and one
beacon node. Program the beacon node with the RadioCountToLed application
from the TestFtsp32kLplBeaconer directory. This is a special modification of
the RadioCountToLed code which allows to evaluate a duty-cycled ftsp
network. The regular RadioCountToLed code doesn't work, since a LPL
broadcast message gets transmitted more than just once. Thus, there is a
disambiguity in which precise broadcast message was actually timestamped by
the TestFtsp application. The modifications take care of this by using the
TimeSyncAMSend interface and setting an arbitrary event time. Thus, on
reception, the TestFtsp code can account for this delayed send.
To evaluate the synchronization precision, use the FtspDataLogger.py
application. First, you will need a serial forwarder that connects to the
BaseStation node. Then, run the python application like this:
python FtspDataLogger.py sf@localhost:9002
You should now see messages coming in, one per line. The first value is the
current time as a unix timestamp. The last line is a binary value indicating
if there was some missed data, and thus the values are not good (indicated
by a 1), or if all the nodes are synchronized and we received a value for
each and every one of them (indicated by a 0).
Note!!!!!
- the basestation should also define
CFLAGS += -DTOSH_DATA_LENGTH=50
in the makefile. Else, the reports will not fit into 1 tinyos message, and
they will get silently dropped.
- 32k timesync only works for certain platforms (those that provide 32khz
counter), if your platform does not support the counter, LPL still works,
but you need to use TMilli timesync
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