Echelon LonTal Stack - Manual (Page 3)

LonTalk Stack Developer’s Guide iii
Table of Contents
Welcome.........................................................................................................ix
Audience ........................................................................................................ix
Related Documentation ................................................................................ ix
1 Introduction to LonTalk Stack ............................................................... 1
Overview ......................................................................................................... 2
A L ON W ORKS Device with a Single Processor Chip .............................. 3
A L ON W ORKS Device with Two Processor Chips ................................... 4
ShortStack Developer’s Kit .............................................................. 4
LonTalk Stack Developer’s Kit......................................................... 6
Comparing Neuron-Hosted, ShortStack, and LonTalk Stack
Devices...................................................................................................... 7
Requirements and Restrictions for LonTalk Stack...................................... 9
Development Tools for LonTalk Stack........................................................ 10
LonTalk Stack Architecture ........................................................................ 10
Overview of the LonTalk Stack Development Process .............................. 12
2 Getting Started with the LonTalk Stack Developer’s Kit ..............19
LonTalk Stack Overview ............................................................................. 20
Installing the LonTalk Stack Developer’s Kit............................................ 20
Hardware Requirements....................................................................... 20
Software Requirements......................................................................... 20
Installing the LonTalk Stack Developer’s Kit ..................................... 21
LonTalk Stack Files ..................................................................................... 21
LonTalk Interface Developer....................................................................... 21
Example LonTalk Stack Applications ........................................................ 22
3 Loading the Echelon Smart Transceiver or Neuron Chip .............25
Loading Overview ........................................................................................ 26
Integrating a Custom Network Interface ................................................... 28
Defining Incoming Layer 2 Packet Buffers.......................................... 29
Functions................................................................................................ 29
4 Designing the Serial I/O Hardware Interface ...................................31
Overview of the Hardware Interface .......................................................... 32
Reliability............................................................................................... 32
Serial Communication Lines ................................................................ 32
The RESET~ Pin ................................................................................... 33
Selecting the Link-Layer Bit Rate........................................................ 34
Host Latency Considerations................................................................ 36
SCI Interface ................................................................................................ 36
Performing an Initial Echelon Smart Transceiver Health Check ............ 37
5 Creating a LonTalk Stack Serial MIP Driver....................................39
Overview of the Link Layer Protocol .......................................................... 40
Code Packet Layout............................................................................... 40
Type Code Values............................................................................ 42
Acknowledgment Rules .................................................................. 44
Sequence Number Cycling and Duplicate Detection .................... 45
Supported MIP Command Set.............................................................. 45
Layer 2 / Layer 5 Modes........................................................................ 46
Product Query Network Management ................................................. 47