Pro Windows Embedded Compact 7: Producing Device Drivers by Abraham Kcholi

By Abraham Kcholi

Home windows Embedded Compact 7 is the normal selection for constructing refined, small-footprint units for either shoppers and the company. For this most recent model, a few major improvements were made, so much significantly the facility to run multi-core processors and handle greater than the 512 MB of reminiscence constraint in past models. utilizing standard developer instruments, professional home windows Embedded Compact 7 will take you on a deep-dive into equipment motive force improvement. you are going to methods to arrange your operating atmosphere, the instruments that you're going to desire and the way to consider constructing for small units prior to fast placing idea into perform and constructing your individual first driving force from the floor up.

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Exe in the %_WINCEROOT%\Public\Tree directory, where Tree is a project specified by _DEPTREES. exe compiles the source code in the project's directories. bat –p Tree, where Tree is a project specified by _DEPTREES. bat. bat builds the modules in the %_PROJECTROOT%\Oak\Misc directory. exe in the %_PLATFORMROOT%\%_TGTPLAT% directory to compile the code for the hardware platform. BAT is the tool that prepares the build environment. It uses three input parameters to set environment variables. The first parameter indicates the CPU architecture for the build and sets the %_TGTCPU% environment variable; the second parameter indicates the OSDesign directory name for the build and sets the %_TGTPROJ% environment variable and last parameter indicates the BSP being used for the build to set the %_TGTPLAT% environment variable.

A device driver’s namespace is used instead of a file name as such. A device driver’s name space can be one of the following formats: • Three-letter prefix, followed by a number between 0 and 9, followed by a colon. For example “TST0:” • $bus mount point, followed by the bus name, bus number, device number, and function number. info CHAPTER 1 ■ THE FOUNDATION OF DEVICE DRIVER DEVELOPMENT FOR WINDOWS EMBEDDED COMPACT • $device mount point, followed by a three-letter prefix representing the device, followed by a number, this allows for more than 10 device instances for the same device prefix.

Chapter Summary Understanding the operating system architecture is cardinal to writing robust device drivers. The memory architecture governs how memory is allocated and passed between kernel mode components, which kernel mode device drivers actually are, and user mode processes. Understanding the virtual memory scheme employed by Windows Embedded Compact 7 helps in designing well-behaved device drivers. Device Manager is the operating system’s component that loads, tracks, and interacts with stream device drivers, which are the main topic of this book.

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