User Manual

Software Design
ZSTAR3 Reference Design Manual, Rev. 0.1
Freescale Semiconductor 5-33
Preliminary
Pr
e
l
i
m
i
n
a
ry
• Support up to 16 sensors (slaves)
• Network datarate is 30Hz (33.333ms)
• Data capture designed network
• Lock Network number (NetNum)
• Automatic/Manual select of communication channel
• Collect all RSSI(Receive Signal Strength Indicator) information of communication
5.3.2 Zpacket Format
The ZSTAR Zpacket is contained inside the MC1319x/MC1321x standard packet structure, which is
consistent with the IEEE 802.15.4 Standard. The SMAC library transparently adds a 16 bit Packet control
field (see chapter 7.2.1.1 of IEEE 802.15.4 Standard specifications) to differentiate packets from ZigBee
and other standards.
The Zpacket becomes a payload data for the SMAC standard packet and contains the following fields:
• 5.3.2.1, “Network Number(NetNum)
• 5.3.2.2, “RX Strength
• 5.3.2.3, “Zcommand
• 5.3.2.4, “Zdata
Figure 5-1. Zpacket Format
Preamble SFD FLI
Payload Data
FCS
MC1319x/MC1321x Packet Structure
SFD (Start of Frame Delimiter)
FLI (Frame Length Indicator)
FCS (Frame Check Sequence)
Network number
RX
strength
Zcommand Zdata
ZSTAR3 Zpacket Structure
Packet control
SMAC payload
SMAC Packet Structure
field