Abstract:
A method includes generating source code corresponding to a block diagram model and generating hypertext links associating elements of the generated source code with elements of the block diagram model.

Description:
TECHNICAL FIELD  
         [0001]    This invention relates to linked code generation reports.  
         BACKGROUND  
         [0002]    Data representation and modeling are an integral part of working with dynamic real-world systems such as electrical circuits, shock absorbers, braking systems, and many other electrical, mechanical and thermodynamic systems. These systems may be modeled, simulated and analyzed on a computer system using block diagram modeling. Block diagram modeling graphically depicts mathematical relationships among a system&#39;s inputs, states, parameters, and outputs, typically through the use of a graphical user interface (GUI). Block diagram modeling also graphically depicts time-dependent mathematical relationships among a system&#39;s inputs, states and outputs, typically for display on the GUI.  
           [0003]    Block diagram modeling may involve automatic code generation, a process whereby software source code is automatically produced from a block diagram model of a dynamic system. The software source code produced by the automatic code generation process may be compiled and executed on a target processor, implementing the functionality specified by the model.  
           [0004]    It is common for the code generated by an automatic code generator to include explanatory comments. Typically, such comments act as headers to generated functions or data structures, and provide an indication of how those functions or data structures logically relate to the block diagram model.  
         SUMMARY  
         [0005]    According to one aspect of the invention, a method includes generating source code corresponding to a block diagram model, and generating hypertext links associating elements of the generated source code with elements of the block diagram model.  
           [0006]    One or more of the following features may also be included. The method may further include displaying the source code and hypertext links on a display, receiving input from a user representing the selection of one of the hypertext links, and displaying to the user at least a portion of the block diagram model including an element of the model associated with the hypertext link. Displaying may include displaying the associated element in a highlighted fashion. At least one of the associated elements in the generated source code may be a commented reference to a block in the block diagram model. At least one of the associated elements in the generated source code may be a variable reference in an operative code section. The hypertext link may be Standard Generalized Markup Language (SGML) or Hypertext Markup Language (HTML). The hypertext language may be Extensible Markup Language (XML). The commented reference to a block may include a character string identifying a path to a file providing information relating to the sections of the block.  
           [0007]    According to another aspect of the invention, a system includes means for generating source code corresponding to a block diagram model and means for generating hypertext links associating elements of the generated source code with elements of the block diagram model.  
           [0008]    One or more of the following features may also be included. The system may further include means for displaying the source code and hypertext links on a display, means for receiving input from a user representing the selection of one of the hypertext links, and means for displaying to the user at least a portion of the block diagram model including an element of the model associated with the hypertext link. The means for displaying to the user at least a portion of the block diagram model may include displaying the associated element in a highlighted fashion. At least one of the associated elements in the generated source code may be a commented reference to a block in the block diagram model. At least one of the associated elements in the generated source code may be a variable reference in an operative code section. The hypertext link may be Standard Generalized Markup Language (SGML) or Hypertext Markup Language (HTML). The hypertext language may be Extensible Markup Language (XML). The commented reference to a block may include a character string identifying a path to a file providing information relating to the sections of the block.  
           [0009]    Embodiments may have one or more of the following advantages.  
           [0010]    The system provides easy access and direct navigation from a syntax-highlighted code generation report to a block in a block diagram model. The use of the syntax-highlighted code generation report enables the user to directly view and access blocks in a block diagram model from their corresponding source code within a browser&#39;s window while at the same time allowing the user to modify, reconfigure, and view other relevant data pertaining to the blocks under analysis as the block is being viewed. Moreover, in addition to the ease of instant navigation, the traceability of the source code back to the corresponding block increases efficiency in data modeling, processing, and analysis, and is beneficial in increasing accuracy of results and minimizing analytical human error.  
           [0011]    The syntax-highlighted code generation report provides increased efficiency and operation in terms of the usage, storage, and management of information. Information about a particular dynamic system is quickly and efficiently accessed as well as managed and stored in an efficient manner.  
           [0012]    The syntax-highlighted code generation report enables a user to efficiently control the information related to the data to be used with a block-based design environment, as opposed to having to exit, enter, re-enter, close or open new viewing windows to access source code information about the block. This facilitates a seamless transfer and view of information from the source code to the block-based design environment, enabling users to have a location with all the information required for analyzing and studying a block diagram model and/or system. Moreover, this reduces the redundancy, inconsistency and errors associated with having multiple sources of access to the source code. In addition, the ability to easily and quickly link the block to the source code makes it possible for users to reliably work without interruption, reducing inconsistency and redundancy.  
           [0013]    Syntax-highlighted code generation reports simplify the task of defining, viewing, and modifying data associated with the block.  
           [0014]    The source code accessed from the syntax-highlighted code generation report is available throughout the block-based design environment and is propagated to all stages of the process.  
           [0015]    Other features, objects, and advantages of the invention will be apparent from the description and drawings, and from the claims. 
       
    
    
     DESCRIPTION OF DRAWINGS  
       [0016]    [0016]FIG. 1 is a block diagram of a code generation report generating system.  
         [0017]    [0017]FIG. 2 is a flow diagram of the link code generation report process of FIG. 1.  
         [0018]    [0018]FIG. 3 is a diagram of the report compiler of FIG. 1.  
         [0019]    [0019]FIG. 4 is a flow diagram of the parsing process of FIG. 3.  
         [0020]    [0020]FIG. 5 illustrates an exemplary model diagram and associated syntax highlighted code generation report.  
     
    
     DETAILED DESCRIPTION  
       [0021]    [0021]FIG. 1 shows a processing system  10 . The processing system  10  includes a computer  12 , such as a personal computer (PC). Computer  12  is connected to a network  14 , such as the Internet, that runs TCP/IP (Transmission Control Protocol/Internet Protocol) or another suitable protocol. Connections may be via Ethernet, wireless link, telephone line, and the like.  
         [0022]    Computer  12  contains a processor  16  and a memory  18 . Memory  18  stores an operating system (“OS”)  20  such as Windows98® or Linux, a TCP/IP protocol stack  22  for communicating over network  14 , and machine-executable instructions  24  executed by processor  16  to perform linked code generation report process  100  below. The memory  18  also includes a code compiler  26  and a report compiler  28 . Computer  12  also includes an input/output (I/O) device  30  for display of a graphical user interface (GUI)  32  to a user  34 .  
         [0023]    Referring to FIG. 2, the linked code generation report process  100  includes generating ( 102 ) a model diagram. The model diagram represents a dynamic system to be simulated and is displayed to the user  34  on the GUI  32  of the input/output device  30 .  
         [0024]    The model diagram is specified by the user  34  and represented by a source model language such as, for example, Simulink® from The Mathworks, Inc. of Natick, Mass., incorporated herein by reference. The process  100  converts ( 104 ) in the code compiler  26  the source model language into program source code in a technique generally referred to as code generation. Code generation is a technique whereby software, i.e., program source code such as C, Ada, Basic and Java®, is automatically produced from the source model language representing by the model diagram. The software source code produced may be compiled and then executed on a target processor, implementing the functionality of the specified model diagram.  
         [0025]    An example automatic code generator is Real Time Workshop® Embedded Coder from The Mathworks, Inc. of Natick, Mass., incorporated herein by reference.  
         [0026]    The process  100  generates ( 106 ) using the report compiler  28  a markup language document, generally referred to as a code generation report, that contains information about the source model language, settings of the code generator and the generated program source code in syntax highlighted form. Each part of the generated program source code is translated by the report compiler  28  and saved into its own markup language file. The markup language file is generally referred to as a syntax-highlighted code generation report.  
         [0027]    The generated markup language files contain hyperlinks to the source model language representing the model diagram and allow the user  34  to navigate from the markup language file to the source model language and the block it represents in the model diagram. This provides the user  34  with an ability to identify a block that corresponds to selected code fragments in the generated program source code.  
         [0028]    A hyperlink is a selectable connection from one word, picture, or information object to another. In a multimedia environment such as the World Wide Web, such objects can include sound and motion video sequences. The most common form of link is the highlighted word or picture that can be selected by the user (with a mouse or in some other fashion), resulting in the immediate delivery and view of another file. The highlighted object is referred to as an anchor. The anchor reference and the object referred to constitute a hyperlink.  
         [0029]    Referring to FIG. 3, the report compiler  28  includes a parsing process  110  and a software source code markup language conversion process  112 . The parsing process  110  analyzes the generated software source code and replaces listed block references in the comment sections with links that refer back to the corresponding sections within the source model language representing the blocks of the model diagram. The software source code to markup language conversion process  112  converts the generated software source code to the syntax highlighted markup language code generation report.  
         [0030]    The parsing process  110  is best understood by using a C source code example. Referring to FIG. 4, the parsing process  110  includes loading ( 120 ) the C program source code into memory  18 . For each line of C program code, process  110  determines ( 122 ) whether the parser is at the start of a comment line. In the C language, a comment begins with the special symbols “\*”. If no comment start is detected, the process  110  replaces ( 124 ) global symbol names with hyperlinks and may color keywords according to the syntax. If a comment start is detected, the process  110  determines ( 126 ) whether a comment end is detected. In the C language, a comment ends with the special symbols “*\”. If no comment end is detected, the process  110  finds ( 128 ) a block path within the comment by applying a multiple pattern match. If a block path is detected, the process  110  replaces ( 130 ) the block path with a special hyperlink back to the model diagram. This special hyperlink contains a command that highlights the references block, like the following example:  
         [0031]    &lt;A href=“execute:highight_system model/Block_A”&gt;model/BlockA&lt;/A&gt; 
         [0032]    The above command may be executed if the user  34  selects the hyperlink, and the user  34  has a browser capable of executing the command in the model diagram environment.  
         [0033]    Referring to FIG. 5, an exemplary model diagram  190  and associated syntax highlighted code generation report  192  are shown. The hyperlinks in the report  192  are numbered to illustrate their correspondence to the blocks of the model diagram  193 . For example,  202  in the report  192  is a hyperlink to the gain block  202 ′ in model diagram  190 .  
         [0034]    Further aspects, features and advantages will become apparent from the following claims.