Книга: Microsoft Windows Embedded CE 6.0 Exam Preparation Kit

Using a Catalog Item for BSP Development

Using a Catalog Item for BSP Development

Now that you have added your new catalog component and learned how to set item- specific environment variables, you can use this technique to include the component in a BSP, set C/C++ build directives, and modify system registry settings in the runtime image. When other developers using this BSP select your catalog item in an OS design project, they will implicitly use the settings you specified. To include a catalog component in a BSP, you need to edit the BSP's Platform.bib file and add a conditional statement based on your settings. You can choose to include a component if a variable is or isn't defined by using if-else statements. Note that it might be necessary to run the Rebuild Current BSP and Subprojects command, which you can find in Visual Studio on the Build menu, under Advanced Build Commands, for changes to the .bib and .reg files to take effect. Chapter 2 covers the Rebuild Current BSP and Subprojects command in more detail.

To set a C/C++ directive based on an environment variable that you specified in the catalog item's properties, you can use a conditional statement in the sources file based on the variable and add a CDEFINES entry. You should generally try to avoid setting C/C++ build directives based on catalog item properties, as this approach will make it difficult to distribute a binary version of your BSP in the future.

You can also change entries in the system registry by using conditional statements. You only need to edit the .reg files to include or exclude certain registry files related to the new component.

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