Echelon FTXL - Manual (Page 18)

6 Introduction to FTXL
Using a ShortStack Micro Server makes it easy to add L ON W ORKS networks to
any existing smart device.
Transceiver and
wiring
Application in any
suitable language
ShortStack Device
SCI or SPI serial I/O
link layer and driver
software Link layer
Host Processor
FT 3120, PL 3120,
FT 3150, or PL 3150
Smart Transceiver
Link layer
Figure 2. The ShortStack Solution for a Host-Based L ON W ORKS Device
LonTalk Platform for FTXL Transceivers
The LonTalk Platform for FTXL Transceivers is a set of development tools, APIs,
firmware, and chips for developing host-based L
ON W ORKS devices that use the
LonTalk API and an FTXL Transceiver.
An FTXL Transceiver is an FT 3190 Smart Transceiver with firmware that
implements the data link layer (layer 2) of the LonTalk protocol, as shown in
Figure 3 on page 8. The host processor implements the remaining layers (layers
3 to 7). Included with the FTXL development tools is the FTXL LonTalk protocol
stack, which implements layers 3 to 6 of the LonTalk protocol and runs on the
host processor. Your application implements the application layer (layer 7).