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Tornado 2.0 User’s Guide It is recommended that a single registry be used at a development site, to allow access to all targets on the network. To ensure that the registry starts up automatically in the event of a server reboot, it should be invoked from a UNIX system initialization file. A registry should never be killed; without a registry, target servers cannot be named, and no Tornado tool can connect to a target. See 2.2 Setting up the Tornado Registry, p.18. Virtual I/O Virtual I/O is a service provided jointly by the target agent and target server. It consists of an arbitrary number of logical devices (on the VxWorks end) that convey application input or output through standard C-language I/O calls, using the same communication link as other agent-server transactions. This mechanism allows developers to use standard C routines for I/O even in environments where the only communication channel is already in use to connect the target with the Tornado development tools. From the point of view of a VxWorks application, a standard I/O channel is an ordinary character device with a name like /vio/0, /vio/1, and so on. It is managed using the same VxWorks calls that apply to other character devices, as described in the VxWorks Programmer’s Guide: I/O System. This is also the developer’s point of view while working in the Tornado shell. On the host side, virtual I/O is connected to the shell or to the target server console, which is a window on the host where the target server is running. See Target-Server Configuration Options, p.76 for information about how to configure a target server with a virtual console. 1.6 Online Documentation Tornado online documentation includes online versions of all manuals, as well as a context-sensitive reference entry for each tool, and a search facility. The online manuals include all standard Tornado and VxWorks manuals, as well as the GNU manuals, in HTML format. To view the online manuals, click Help>Manuals Contents in the Tornado launcher, browser, and debugger. Reference 12
1 Overview manual information can also be accessed directly from the shell and project facility workspace. 1 1.7 Extending Tornado Tornado can be extended and customized through standard APIs, as well as with optional products available from Wind River Systems and third-party vendors. Published Application Program Interfaces A central feature of Tornado is the rich set of Application Program Interfaces (APIs) that allow access to every level of the technology. Much of Tornado is implemented in Tcl; source code is included automatically, because Tcl is an interpreted language. By virtue of their Tcl implementation, Tornado facilities for target inspection and manipulation are available for customization, extension, or simply for their educational value. Tornado goes further yet: every aspect of the user interface is also under user control. From forms to buttons and menu items, the Tornado environment can be customized. (For a brief summary of Tcl, see B. Tcl.) At the target-server layer, there are C and Tcl language bindings to the underlying protocol. APIs are available for new back ends supporting additional host-totarget connection methods. These bindings use libraries; this makes it unnecessary to build, manage, or maintain alternative configurations of the target server. The target agent also has stable, published run-time and driver interfaces. Each of these APIs is discussed in detail in the Tornado API Guide and the online Tornado API Reference. Optional Products Contact your sales representative for information about optional products from Wind River Systems. 13
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E X Resources E.1 Predefined X Reso
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Index Symbols ? (C/Tcl interpreter
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Index creating 100 linking 103 open
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