Driver Development
A choice of the driver implementation method depends heavily on the device type and additional requirements. For example, a majority of debugging drivers for network cards shipped with the development tools work in poll mode, which is often unacceptable for a regular network driver.
Let us look at a driver implementation that utilizes interrupts. In Windows Embedded CE, the processing of interrupts is divided into two parts: interrupt service routine (ISR) and interrupt service thread (IST). ISR routines are part of the OAL layer. Otherwise, if support is included in the OAL layer, they can be installed during execution (installable ISR routines—IISR). The main tasks of the ISR routine are to determine the source of the interrupt, ...
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