Serenum

SUMMARY

Serenum enumerates Plug-n-Play RS-232 devices that are compliant with the current revision of Plug and Play External COM Device.

It loads as an upper filter driver to many different RS-232 device drivers that are compliant with its requirements and performs this service for them.

BUILDING THE SAMPLE

To build the sample, run the build command. Once built, the sample produces one binary: Serenum.sys. The sample is 64-bit compliant, works on both x86 and Alpha platforms, and supports both Plug and Play and Power Management. There is no one Inf for serenum because it is loaded as a filter driver in different driver stacks. An example of this can be found in %WINDIR%\inf\msports.inf.

CODE TOUR

File Manifest

File           Description

Enum.c          Functions that enumerate external serial devices—the main purpose of this driver

Makefile        Makefile for building this driver

Pnp.c           Plug and Play support code

Power.c         Power support code

Serenum.c       Basic driver functionality

Serenum.h       Local header with defines, prototypes, etc

Serenum.rc      Resource script

Sources         Data file for build.exe

String.c        String handling support; mainly ASCII to UNICODE functionality

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