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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 LONWORKS Device with a Single Processor Chip .............................. 3
A LONWORKS 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
- Developer's Guide 1
- Table of Contents 3
- Welcome 9
- Audience 9
- Related Documentation 9
- ONWORKS device 13
- Overview 14
- ShortStack Developer’s Kit 16
- Smart Transceiver 17
- Communications Channel 17
- Stack Devices 19
- LonTalk Stack Architecture 22
- Process 24
- ONWORKS events 27
- ONWORKS network 28
- Getting Started with the 31
- LonTalk Stack Overview 32
- Hardware Requirements 32
- Software Requirements 32
- LonTalk Stack Files 33
- ONWORKS network interface 34
- ONWORKS channel 34
- See Appendix G 35
- Loading the Echelon Smart 37
- Transceiver or Neuron Chip 37
- Loading Overview 38
- Designing the Serial I/O 43
- Hardware Interface 43
- Reliability 44
- Serial Communication Lines 44
- The RESET~ Pin 45
- **5 PPSBPTPEAPMinBitRate 46
- Interface 47
- Host Latency Considerations 48
- SCI Interface 48
- Health Check 49
- Echelon Smart 50
- Transceiver 50
- MIP Driver 51
- Code Packet Layout 52
- Type Code Values 54
- Acknowledgment Rules 56
- Detection 57
- Supported MIP Command Set 57
- Layer 2 / Layer 5 Modes 58
- Serial MIP Driver Example 59
- Serial MIP Driver API 59
- Structures 59
- Creating a Model File 63
- Model File Overview 64
- Choosing the Data Type 66
- Defining a Functional Block 67
- Declaring a Functional Block 68
- Defining a Network Variable 68
- Variable 70
- Value Changes 74
- Linearization 76
- Declaring a Message Tag 79
- Defining a Resource File 80
- Anonymous Top-Level Types 83
- Legacy Neuron C Constructs 83
- How Authentication Works 85
- Managing Memory 86
- Address Table 86
- Alias Table 87
- Domain Table 87
- Example Model files 88
- Using the LonTalk Interface 93
- Developer Utility 93
- Specifying the Project File 94
- Chip Configuration 95
- Configuring the Buffers 97
- Configuring the Application 98
- ONMARK Standard Program 100
- Specifying the Model File 101
- Copied Files 106
- FtxlDev.h 107
- FtxlDev.c 107
- Using Types 107
- Bit Field Members 109
- Floating Point Variables 110
- Enumerations 110
- Declarations 112
- The Network Variable Table 115
- Network Variable Attributes 115
- The Message Tag Table 116
- Developing a LonTalk Stack 117
- Device Application 117
- Using the LonTalk API 118
- LonTalk Protocol Stack 119
- Callbacks and Events 120
- Restoring Non-Volatile Data 122
- Writing Non-Volatile Data 123
- ONWORKS 127
- Host Processor 128
- Application 128
- Network 129
- Variables 132
- Validating a Type Change 133
- Processing a Type Change 134
- Processing a Size Change 135
- Rejecting a Type Change 136
- Messages 137
- Handling Management Commands 138
- Handling Reset Events 139
- Querying the Error Log 139
- Working with ECS Devices 139
- Using Direct Memory Files 140
- The DMF Memory Window 141
- File Directory 142
- Developing an IP-852 Router 145
- LtLogicalChannel 146
- LtIp852Router 146
- . The application 147
- . The unique ID of the 147
- . The 32-bit 147
- Porting a LonTalk Stack 149
- Porting Overview 150
- LonLink Driver 150
- Service LED 151
- Socket Interfaces 151
- LonTalkStack Source Files 151
- Selecting the Device Type 153
- File System Requirements 154
- Appendix A 155
- LonTalk Interface Developer 155
- Command Line Usage 155
- Command Usage 156
- Command Switches 157
- Specifying Buffers 159
- Appendix B 163
- Appendix C 169
- Functional Block Syntax 170
- Keywords 170
- Examples 172
- Network Variable Syntax 176
- The Network Variable Type 178
- Information 179
- Message Tag Syntax 189
- Appendix D 191
- LonTalk API 191
- Introduction 192
- Callback Handler Functions 192
- LonTalk API Functions 192
- Other LonTalk API Functions 193
- ONWORKS device. The 194
- Extended API Functions 195
- Event Handler Functions 196
- Functions 197
- Managing Critical Sections 202
- Managing Binary Semaphores 202
- Managing System Timing 203
- 192 Appendix D: LonTalk API 204
- Appendix E 205
- Determining Memory Usage for 205
- LonTalk Stack Applications 205
- Memory Use for Code 206
- Memory Use for Transactions 206
- Memory Use for Buffers 207
- Memory for Non-Volatile Data 208
- CPNVlen 210
- Appendix F 213
- Downloading a LonTalk Stack 213
- Application Over the Network 213
- Application Download Utility 215
- Appendix G 217
- Example LonTalk Stack 217
- Applications 217
- Running the Examples 219
- Application Details 220
- Main Function 221
- 210 Appendix G: Appendix G 222
- Example LonTalk 222
- Application Task Function 223
- Event Handler Function 224
- Callback Handler Function 225
- Model File 226
- Appendix H 231
- Error and Warning Messages 231
- Error Messages 232
- ONWORKS Bin folder 234
- Warning Codes 238
- Hint Codes 240
- Appendix I 243
- Glossary 243
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