Ex-neurons-engine NPM

#neurons-engine

Introduction

Neurons Engine is the JavaScript implementation of neurons central processing block, which runs on both Node and browser environment. It includes two parts: 1. Logic Engine.

Neurons binary protocol implementation.
Neurons blocks auto discovery and management.
Communication drivers used for running on different platforms.

Flow Engine.
- Provide Flow-based API to easy Programming.

How To Use

PC/RPI/IntelEdison

install NodeJS environment.
run node cli.js.
connect the blocks with serial port.

Browser

copy browser/neurons_engine.js to your project.
add <script src="/path/to/neurons_engine.js"></script> in your html <head> tag.

Example

see 'example'

LogicEngine Programming API

Create LogicEngine

In Node

    var engine = require('./lib/engine/logic').create(
      {"driver": "serial", "loglevel": "DEBUG"}
    );

In Browser

    var engine = createNeuronsLogicEngine(
      {"driver": "makeblockhd", "loglevel": "DEBUG"}
    );

#### configuration

* `driver`: the driver to use ,currently support 
    * **serial**(Node Only), 
    * **tcpsocket**(Node Only),
    * **cordovable**(Makeblock Neuron App Only), 
    * **cordovatcp**(Makeblock Neuron App Only),

* `loglevel`: the loglevel to set ,when set, will not print the log which priority lower than set.
  * currently support loglevel
    * **TRACE**,
    * **DEBUG**,
    * **INFO**,
    * **WARN**,
    * **ERROR**,
    * **FATAL**

Engine.getActiveBlocks()

Get all active blocks and their values. Example result:

    {
        "1_KEY_BUTTON": [
           {press: 0}
        ],
        "TEMPERATURE": [
          {temperature: 27}
        ],
        "HUMITURE": [
          {temperature_humidity: [27,70]}
        ],        
    }

Engine.getBlockSubStatus(name, subname, idx = 0)

Queries a block's substatus by name. if idx is provided, will return the status of the {idx}th block of the name. If the required block does not exist, will return null.

Return the values array of the block if block exists. eg: [1, 34].

Engine.sendBlockCommand(name, command, params, idx = 0)

Sends a command to block of name given. Only works for blocks with sub command.

name: the name of the block type. eg: "MOTORS"
command: the name of the block command, eg: "SET_SPEED"
params: array,the params of the block command, eg: 100,-100 //port1 port2

Engine Events

use Engine.on(event, callback) to register an event handler.

support events:

'handshake'

callback(name, idx)

name: the name of block type
idx: the {idx}th block

'error'

callback(error)

'blockListChanges'

callback(list)

list: the active blocks list. see Engine.getActiveBlocks

'blockStatusChanges'

callback(name, idx, values)

values: see Engine.GetBlockStatus

'blockConnectionStatusChanges'

callback({name: $name, idx: $idx, state: $state})

Electronic Block Definition

All support electronic blocks are defined in lib/blocks/electronic folder by JSON objects. You can define your own block for extension:

var example = {
  name: 'example', // the block name, MUST be unique
  type: 0x00, // the block type id 
  subtype: 0x01, // the block subtype id , optional.
  status: ['byte', 'BYTE', 'short', 'float'] // the block status values type definition.
};

For blocks will sub status:

var example2 = {
  // the name of the block, must not be unique.
  name: 'example2',
  // the typeid of block.
  type: 0x00,
  // subtypeid of block, optional.
  // subtype: 0x01,
  // available sub status' datatype.
  status: {
    'sub1' : {
      'subid': 0x01,
      'datatype': ['float']
    },
    'sub2' : {
      'subid': 0x02, 
      'datatype' : ['byte', 'BYTE', 'short', 'float']
    }
  }
};

For blocks with sub command:

var example3 = {
  // the name of the block, must not be unique.
  name: 'example3',
  // the typeid of block.
  type: 0x01,
  // subtypeid of block, optional.
  // subtype: 0x01,
  // available sub status' datatype.
  status: {
    'sub1' : {
      'subid': 0x01,
      'datatype': ['float']
    },
    'sub2' : {
      'subid': 0x02, 
      'datatype' : ['byte', 'BYTE', 'short', 'float']
    }
  },
  // block's commands
  commands: {
    'command1': {
      'commandid': 0x01,
      'datatype': ['float']
    }, 
    'command2' : {
      'commandid': 0x02, 
      'datatype' : ['byte', 'BYTE', 'short', 'float']
    }
  }
};

supported value type:

"byte": 7bit/byte byte
"BYTE": 8bit/byte byte (only use when the byte length < 128)
"short": 7bit/byte short
"SHORT": 7bit/byte short, but ignore most significant byte (only use when the MSB is 0x00)
"long": 0x11111111 // 7bit/byte long
"float": 7bit/byte float
"double": 7bit/byte double
"string": 7bit/byte byte array, in TLV format