en:software:qnet_sdk

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en:software:qnet_sdk [2014/12/15 15:22] – qem205en:software:qnet_sdk [2022/03/09 15:34] (current) – qem202
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 +====== QNet-SDK ======
  
 +====== - Introduction ======
 +
 +QNet-SDK is a set of software interfaces (API), libraries, programs and demos released with [[en:software:qworkbench|Qworkbench]] or [[http://www.qemservice.it/Download/Prog/Qwork/QResourcesManager-1.2.2.exe|QResourcesManager]].\\
 +It provides an easy way to develop PC applications including communication with Qem devices that are connected with QNet for third-party software developers.
 +
 +QNet is a network used to connect Qem devices.\\
 +It use a software called QRM (Qem Resources Manager) to manage connection resources.\\
 +
 +To be used the QNet-SDK require that the [[en:software:qworkbench|Qworkbench]] or [[https://www.qemservice.it/Download/Prog/Qwork/QResourcesManager-1.3.5-install-pack.zip|QResourcesManager]] is properly installed either in development computer and in final user computer.
 +
 +====== - QNet Basics ======
 +
 +QNet implements the concept of distribution and de-localization of connection services, in this way it is possible to achieve a local or remote Qem device exactly the same way, making the implementation of a communication program and its use really very simple.
 +
 +QNet is composed by many parts listed below:
 +
 +  * The nodes.
 +  * The QNet cloud.
 +  * The Qem devices.
 +  * The resources ID.
 +  * The signatures keys.
 +  * The API interfaces to connect all.
 +
 +Follow a representative image of entire system:
 +
 +{{:software:qnet_sdk:qnetsdk-schematic.png|}}
 +
 +A node is an execution instance of the QRM program or a [[en:strumenti:accessori:qbr1a:mimqbr1axx|QBR1A]] device. \\
 +A node is identified by a special ID in the cloud. \\ 
 +A node can be connected or disconnected from the cloud. \\
 +In the cloud, there may be multiple nodes simultaneously. \\
 +In the cloud the nodes are visible only when connected. \\
 +
 +A resource is an access point to communicate with a Qem device in which all connection parameters with the same are specified. \\
 +A node has a list of local resources and if connected to the cloud can access the public resources of other nodes connected to the cloud. \\
 +A node is called local when accessed directly via its IP address: Port. \\
 +A node is called remote when accessed, from a local node, using the capabilities of the cloud. 
 +
 +====== - QNetAccessLibrary API ======
 +
 +==== - ClientNode01 Properties ====
 +
 +^ Property Name ^ OLE Data Type ^ Access Mode ^ Description ^
 +| Active                           |  VARIANT_BOOL  |  RW  | Get client connection state with QRM server interface. |
 +| Host                             |  BSTR          |  RW  | Define address where QRM TCP/IP server is listening for a connection. Default is "localhost" aka "127.0.0.1". |
 +| Port                             |  long          |  RW  | Define port where QRM TCP/IP server is listening for a connection. Default is 3000. |
 +| ErrorCode                        |  SignalCode    |  R   | Contains the SignalCode result value from last API method call. |
 +| ErrorMessage                     |  BSTR          |  R   | Contains the description text of SignalCode result value from last API method call. |
 +| ProjectChecksumCode              |  long          |  R   | Contains the code checksum stored in SYM file. |
 +| ProjectChecksumConfiguration     |  long          |  R   | Contains the configuration checksum stored in SYM file. |
 +| ProjectChecksumSources           |  long          |  R   | Contains the sources checksum stored in SYM file. |
 +| ProjectChecksumSymbols           |  long          |  R   | Contains the symbols checksum stored in SYM file. |
 +| TargetChecksumCode               |  long          |  R   | Contains the code checksum stored in the target CPU. |
 +| TargetChecksumConfiguration      |  long          |  R   | Contains the configuration checksum stored in the target CPU. |
 +| TargetChecksumSources            |  long          |  R   | Contains the sources checksum stored in the target CPU. |
 +| TargetChecksumSymbols            |  long          |  R   | Contains the symbols checksum stored in the target CPU. |
 +
 +==== - ClientNode01 Methods ====
 +
 +^ Method Name ^ Return Value ^ Description ^
 +| OpenConnection      |  SignalCode  | Open connection with resource. |
 +| CloseConnection     |  SignalCode  | Close connection with resource. |
 +| CheckConnection     |  SignalCode  | Check connection with resource. |
 +| LoadFromFile        |  SignalCode  | Load project SYM file with all project's info. |
 +| ReadSimple          |  SignalCode  | Get value of a SYSTEM/GLOBAL/TIMER/INPUT/OUTPUT simple variable. |
 +| ReadArray           |  SignalCode  | Get element value of an ARRSYS/ARRGBL array variable. |
 +| ReadArrayRange      |  SignalCode  | Get elements values of an ARRSYS/ARRGBL array variable. |
 +| ReadDGDataProgram   |  SignalCode  | Get element value of a DATAGROUP.DATAPROGRAM variable. |
 +| ReadDGStep          |  SignalCode  | Get element value of a DATAGROUP.STEP variable. |
 +| ReadDevice          |  SignalCode  | Get value of a INTDEVICE parameter/command. |
 +| WriteSimple         |  SignalCode  | Set value of a SYSTEM/GLOBAL/TIMER/INPUT/OUTPUT simple variable. |
 +| WriteArray          |  SignalCode  | Set element value of an ARRSYS/ARRGBL array variable. |
 +| WriteArrayRange     |  SignalCode  | Set elements values of an ARRSYS/ARRGBL array variable. |
 +| WriteDGDataProgram  |  SignalCode  | Set element value of a DATAGROUP.DATAPROGRAM variable.|
 +| WriteDGStep         |  SignalCode  | Set element value of a DATAGRPUP.STEP variable. |
 +| WriteDevice         |  SignalCode  | Set value of a INTDEVICE parameter/command. |
 +| GetCpuState         |  CpuState    | Get actual CPU state. |
 +
 +==== - Data Types ====
 +
 +** SignalCode **
 +^ Enum ^ Ordinal ^ Description ^
 +| sigcNone                            |  0  | All worked fine.  |
 +| sigcGenericError                    |  1  | Generic error in method call.  |
 +| sigcErrorOpeningFile                |  2  | Found an error during file loading using LoadFromFile method. | 
 +| sigcErrorMissingCOMObject           |  3  | ClientNode01 found that some required COM objects aren't registered on system. Re-install QRM package. | 
 +| sigcConnectionError                 |  4  | Error during connection with Qmove target. |
 +| sigcClientConnectionError           |  5  | Error during connection with Qem Resources Manager (QRM). |
 +| sigcResourceDontExistOrAlreadyInUse |  6  | Required resource is don't exist or already in use. |
 +| sigcErrorSymbolNameNotFound         |  7  | Symbol name used in a Read/Write operation doesn't exit. |
 +| sigcErrorDeviceNameNotFound         |  8  | Device name used in a ReadDevice/WriteDevice operation doesn't exist. |
 +| sigcErrorIndexOutOfBounds           |  9  | Index used in a Read/Write operation is out of bounds. |
 +
 +** CpuState **
 +^ Enum ^ Ordinal ^ Description ^
 +| cpusInit                            |  0   | CPU in INIT state.  |
 +| cpusReset                           |  1   | CPU in RESET state.  |
 +| cpusReady                           |  2   | CPU in READY state.  |
 +| cpusRun                             |  3   | CPU in RUN state.  |
 +| cpusStop                            |  4   | CPU in STOP state.  |
 +| cpusErrorBus                        |  5   | CPU in Error for bus configuration.  |
 +| cpusErrorChecksumData               |  6   | CPU in Error for invalid checksum data.  |
 +| cpusErrorIndexOutOfBounds           |  7   | CPU in Error for array index out of bounds.  |
 +| cpusErrorProgramOverRange           |  8   | CPU in Error for datagroup PROGRAM over range.  |
 +| cpusErrorStepOverRange              |  9   | CPU in Error for datagroup STEP over range.  |
 +| cpusErrorDivisionByZero             |  10  | CPU in Error for division by zero in expression.  |
 +| cpusErrorSyntax                     |  11  | CPU in Error for wrong code syntax.  |
 +| cpusErrorWatchdogBus                |  12  | CPU in Error for a watchdog in bus.  |
 +| cpusErrorStack                      |  13  | CPU in Error for call stack overflow.  |
 +| cpusUndefined                       |  14  | CPU in undefined state (for example for missing connection with QMOVE).  |
 +
 +==== - Active ====
 +
 +The //Active// property can be used to get state of connection channel between ClientNode01 object and QRM server pointed to the TCP/IP port defined with //Host// and //Port// properties.\\
 +==== - Host ====
 +
 +The //Host// property is used to define in what IP address the QRM TCP/IP server is listening for a connection with ClientNode01.\\
 +
 +The default value is 'localhost' aka '127.0.0.1', but is possible to reach any QRM available in a public WAN/LAN address.\\
 +The //Host// property SHOULD be set BEFORE to set Active to True or call OpenConnection() method.\\
 +The //Host// property can be either numeric IP string or an URL (that require a DNS server running).
 +
 +==== - Port ====
 +
 +The //Port// property is used to define in what IP port the QRM TCP/IP server is listening for a connection with ClientNode01.\\
 +
 +The default value is 3000, but is possible to reach any QRM available in a public WAN/LAN address using any different port.\\
 +The //Port// property SHOULD be set BEFORE to set Active to True or call OpenConnection() method.\\
 +
 +==== - ErrorCode ====
 +
 +In the //ErrorCode// property is stored the SignalCode result value from last API method call..
 +
 +==== - ErrorMessage ====
 +
 +In the //ErrorMessage// property is stored the description text of SignalCode result value from last API method call.
 +
 +==== - ProjectChecksumCode ====
 +
 +The //ProjectChecksumCode// property contains the code checksum stored in SYM file loaded using LoadFromFile() method.
 +
 +==== - ProjectChecksumConfiguration ====
 +
 +The //ProjectChecksumConfiguration// property contains the configuration checksum stored in SYM file loaded using LoadFromFile() method.
 +
 +==== - ProjectChecksumSources ====
 +
 +The //ProjectChecksumSources// property contains the sources checksum stored in SYM file loaded using LoadFromFile() method.
 +
 +==== - ProjectChecksumSymbols ====
 +
 +The //ProjectChecksumSymbols// property contains the symbols checksum stored in SYM file loaded using LoadFromFile() method.
 +
 +==== - TargetChecksumCode ====
 +
 +The //TargetChecksumCode// property contains the code checksum stored in Target CPU loaded using OpenConnection() method.
 +
 +==== - TargetChecksumConfiguration ====
 +
 +The //TargetChecksumConfiguration// property contains the configuration checksum stored in Target CPU loaded using OpenConnection() method.
 +
 +==== - TargetChecksumSources ====
 +
 +The //TargetChecksumSources// property contains the sources checksum stored in Target CPU loaded using OpenConnection() method.
 +
 +==== - TargetChecksumSymbols ====
 +
 +The //TargetChecksumSymbols // property contains the symbols checksum stored in Target CPU loaded using OpenConnection() method.
 +
 +==== - OpenConnection ====
 +
 +The //OpenConnection// method is used to open a connection with a Qem device somewhere in the cloud using its Resource ID. \\
 +
 +A Resource ID is a string data which can be obtained clicking with right mouse key upon resource name in the QRM resource list and choosing the menu 'Copy Resource ID to Clipboard'. \\
 +At this point in the Clipboard you will have a string like that: //{E5F1E5D9-A909-41D4-A89D-0374C83E6163}//. Well done. This is a Resource ID ! \\
 +
 +<code idl>SignalCode OpenConnection([in] BSTR ResourceID);</code>
 +
 +^ Argument ^ Data Type ^ Description ^
 +| Resource ID |  BSTR        | Is the Resource ID of a device's connect configuration defined somewhere in the cloud. |
 +
 +**PS**: remember Resource ID is a UNIQUE ID so there will be no other resources with the same ID in all the cloud.
 +
 +**PS**: OpenConnection try implicitly to put Active property to True if is in False state, where CloseConnection try implicitly to put Active property to False if in True state.
 +
 +==== - CloseConnection ====
 +
 +The //CloseConnection// method is used to close an opened connection with a Qem device somewhere in the cloud. \\
 +
 +<code idl>SignalCode CloseConnection();</code>
 +==== - CheckConnection ====
 +
 +<code idl>SignalCode CheckConnection();</code>
 +
 +==== - LoadFromFile ====
 +
 +<code idl>SignalCode LoadFromFile([in] BSTR FileName);</code>
 +
 +==== - ReadSimple ====
 +
 +<code idl>SignalCode ReadSimple([in] BSTR SymbolName, [in, out] BSTR* Value);</code>
 +
 +==== - ReadArray ====
 +
 +<code idl>SignalCode ReadArray([in] BSTR ArrayName, [in] long Index, [in, out] BSTR* Value);</code>
 +
 +==== - ReadArrayRange ====
 +
 +<code idl>SignalCode ReadArrayRange([in] BSTR ArrayName, [in] long Index, [in] long Elements, [in, out] VARIANT* Values);</code>
 +
 +==== - ReadDGDataProgram ====
 +
 +<code idl>SignalCode ReadDGDataProgram([in] BSTR SymbolName, [in] long ProgIndex, [in, out] BSTR* Value);</code>
 +
 +==== - ReadDGStep ====
 +
 +<code idl>SignalCode ReadDGStep([in] BSTR SymbolName, [in] long ProgIndex, [in] long StepIndex, [in, out] BSTR* Value);</code>
 +
 +==== - ReadDevice ====
 +
 +<code idl>SignalCode ReadDevice([in] BSTR DeviceName, [in] BSTR SymbolName, [in, out] BSTR* Value);</code>
 +
 +==== - WriteSimple ====
 +
 +<code idl>SignalCode WriteSimple([in] BSTR SymbolName, [in] BSTR Value);</code>
 +
 +==== - WriteArray ====
 +
 +<code idl>SignalCode WriteArray([in] BSTR ArrayName, [in] long Index, [in] BSTR Value);</code>
 +
 +==== - WriteArrayRange ====
 +
 +<code idl>SignalCode WriteArrayRange([in] BSTR ArrayName, [in] long Index, [in] long Elements, [in] VARIANT Values);</code>
 +
 +==== - WriteDGDataProgram ====
 +
 +<code idl>SignalCode WriteDGDataProgram([in] BSTR SymbolName, [in] long ProgIndex, [in] BSTR Value);</code>
 +
 +==== - WriteDGStep ====
 +
 +<code idl>SignalCode WriteDGStep([in] BSTR SymbolName, [in] long ProgIndex, [in] long StepIndex, [in] BSTR Value);</code>
 +
 +==== - WriteDevice ====
 +
 +<code idl>SignalCode WriteDevice([in] BSTR DeviceName, [in] BSTR SymbolName, [in] BSTR Value);</code>
 +
 +===== - ClientNode Interface =====
 +
 +Will follow the IDL representation of ClientNode Interface to use if you would like to manually access it with IDispatch.
 +
 +<code idl>
 +[
 +  uuid(A58FB5BD-8704-4746-AC0D-B9F34701BC4A),
 +  version(1.0),
 +  helpstring("Dispatch interface for ClientNode01 Object"),
 +  dual
 +]
 +dispinterface IClientNode01 {
 +  properties:
 +  methods:
 +      [id(0x000000c9), propget]   VARIANT_BOOL Active();
 +      [id(0x000000c9), propput]   void Active([in] VARIANT_BOOL rhs);
 +      [id(0x000000ca), propget]   BSTR Host();
 +      [id(0x000000ca), propput]   void Host([in] BSTR rhs);
 +      [id(0x000000cb), propget]   long Port();
 +      [id(0x000000cb), propput]   void Port([in] long rhs);
 +      [id(0x000000cc)]            SignalCode LoadFromFile([in] BSTR FileName);
 +      [id(0x000000ce), propget]   long ProjectChecksumCode();
 +      [id(0x000000cd), propget]   long ProjectChecksumConfiguration();
 +      [id(0x000000cf), propget]   long ProjectChecksumSources();
 +      [id(0x000000d0), propget]   long ProjectChecksumSymbols();
 +      [id(0x000000d1), propget]   long TargetChecksumCode();
 +      [id(0x000000d2), propget]   long TargetChecksumConfiguration();
 +      [id(0x000000d3), propget]   long TargetChecksumSources();
 +      [id(0x000000d4), propget]   long TargetChecksumSymbols();
 +      [id(0x000000d5)]            SignalCode OpenConnection([in] BSTR ResourceID);
 +      [id(0x000000d6)]            SignalCode CloseConnection();
 +      [id(0x000000d7)]            SignalCode CheckConnection();
 +      [id(0x000000d8)]            SignalCode ReadSimple([in] BSTR SymbolName, [in, out] BSTR* Value);
 +      [id(0x000000d9)]            SignalCode ReadArray([in] BSTR ArrayName, [in] long Index, [in, out] BSTR* Value);
 +      [id(0x000000da)]            SignalCode ReadDGDataProgram([in] BSTR SymbolName, [in] long ProgIndex, [in, out] BSTR* Value);
 +      [id(0x000000db)]            SignalCode ReadDGStep([in] BSTR SymbolName, [in] long ProgIndex, [in] long StepIndex, [in, out] BSTR* Value);
 +      [id(0x000000dc)]            SignalCode ReadDevice([in] BSTR DeviceName, [in] BSTR SymbolName, [in, out] BSTR* Value);
 +      [id(0x000000dd)]            SignalCode WriteSimple([in] BSTR SymbolName, [in] BSTR Value);
 +      [id(0x000000de)]            SignalCode WriteArray([in] BSTR ArrayName, [in] long Index, [in] BSTR Value);
 +      [id(0x000000df)]            SignalCode WriteDGDataProgram([in] BSTR SymbolName, [in] long ProgIndex, [in] BSTR Value);
 +      [id(0x000000e0)]            SignalCode WriteDGStep([in] BSTR SymbolName, [in] long ProgIndex, [in] long StepIndex, [in] BSTR Value);
 +      [id(0x000000e1)]            SignalCode WriteDevice([in] BSTR DeviceName, [in] BSTR SymbolName, [in] BSTR Value);
 +      [id(0x000000e2), propget]   SignalCode ErrorCode();
 +      [id(0x000000e3), propget]   BSTR ErrorMessage();
 +      [id(0x000000e4)]            SignalCode ReadArrayRange([in] BSTR ArrayName, [in] long Index, [in] long Elements, [in, out] VARIANT* Values);
 +      [id(0x000000e5)]            SignalCode WriteArrayRange([in] BSTR ArrayName, [in] long Index, [in] long Elements, [in] VARIANT Values);
 +      [id(0x000000E6)]            CpuState GetCpuState();      
 +};
 +</code>
 +===== - Code Samples =====
 +
 +Will follow in this chapter some simple samples to understand how to use the QNet-SDK interfaces.\\
 +The QNet-SDK interfaces can be used with any programming language and IDE which support the COM specification and specifically the [[http://en.wikipedia.org/wiki/IDispatch|IDispatch]] interface.\\
 +For the following samples was used a 32 bit Windows 7 machine with Microsoft Visual Studio Express 2012 and the Visual Basic.NET language.\\
 +The tool is freely downloadable from following link [[http://www.microsoft.com/visualstudio/eng/products/visual-studio-express-for-windows-desktop#product-express-desktop|link]].
 +
 +Is not goal of these pages "to be guide" on how use IDE and COM interfaces in programming language which are you are used to.\\
 +
 +====== - First Steps ======
 +
 +Before to be used the QNet-SDK API Library need to be imported in the develop environment following next steps:\\
 +
 +  - Open a new Visual Basic 2012 project called FirstSteps.
 +  - Rename default form name from Form1 to DesktopView to be aligned with next following instructions.
 +  - Import library using menu item "**PROJECT->Add Reference...->COM->Type Libraries**" and select //QNet Access Library 1.0// like showed below:\\ \\ {{software:qnet_sdk:import_interfaces.png?nolink|}} \\ \\
 +  - Open DesktopView code editor and add:\\ \\
 +    * Object reference declaration \\ To be used in the program the ClientNode01 interface need to be supported by an object reference with : \\ \\ <code freebasic>    
 +      ClientNode As QNetAccessLibrary01.ClientNode01</code>
 +    * Object creation \\ In some initialization place, like the main class constructor, creates the ClientNode01 object with : \\ \\ <code freebasic>
 +      ' Create ClientNode object
 +      ClientNode = New QNetAccessLibrary01.ClientNode01</code>
 +    * Release object \\ In some finalization place, like the main from closed event, release ClientNode01 object with : \\ \\ <code freebasic>
 +      ' Free ClientNode object
 +      ClientNode = Nothing</code> 
 +
 +\\
 +At the end of these steps you should have something like: \\
 +<code freebasic>
 +Public Class DesktopView
 +
 +    Private ClientNode As QNetAccessLibrary01.ClientNode01
 +
 +    Public Sub New()
 +
 +        ' This call is required by the designer
 +        InitializeComponent()
 +
 +        ' Create and initialize ClientNode object
 +        ClientNode = New QNetAccessLibrary01.ClientNode01
 +
 +    End Sub
 +
 +    Private Sub DesktopView_FormClosed(sender As Object, e As FormClosedEventArgs) Handles MyBase.FormClosed
 +
 +        ' Free ClientNode object
 +        ClientNode = Nothing
 +
 +    End Sub
 +
 +End Class
 +</code>
 +
 +This is actually the minimal skeleton required to start to work with QNet-SDK.\\
 +Next step involves to load Qmove project symbols files and operations required to read and write any type of Qmove variables.
 +
 +
 +====== - Files ======
 +
 +<WRAP center round download 60%>
 +{{software:qnet_sdk_example.zip|qnet_sdk_example}}
 +</WRAP>