This is an intensive program intended at explaining the core concepts involved in Windows Driver development using the Windows Driver Model (WDM) framework. It is intended for device driver and device firmware writers for writing function/client drivers for devices such as audio, parallel/serial port and other devices.
Developing WDF Device Drivers For Windows
Windows Driver Foundation (WDF) is the Microsoft unified driver model. It supports the creation of object-oriented kernel-mode and user-mode drivers for Windows. By using WDF, driver engineers can focus on their device hardware, instead of on the operating system. WDF simplifies driver development and maintenance in a number of ways, including:
Managing most interactions with the operating system, Enabling a broader range of devices to be supported by user-mode drivers. Supporting a robust, well-designed object model, Providing intelligent default handling for common features such as Plug and Play and power management, Reducing the occurrence of common race conditions.
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An embedded awareness & advanced training Group
Pre-requisites:
A. Sound knowledge of C programming (Must)
B. Knowledge of Windows OS Internals (Must)
C. Basic H/W device concepts such as memory mapping, port access, device registers etc. (Must)
D. Communication protocols (Desirable)
The key learning from the program are:
A. Structure of WDM drivers
B. I/O Request data structures, handling and management
C. Introduction to Plug'n'Play
Course Details:
Developing WDM Drivers
Day 1 Basic Structure of a WDM Driver
How Drivers and Applications Work
Introduction to basic concepts:
Device and Driver Layering
Plug and Play Devices
Legacy Devices
IRP Routing
The Two Basic Data Structures
Driver objects
Device objects
Overview of DriverEntry, DriverUnload and AddDevice Routines
Creating a Device object
Naming Devices
Day 2 The I/O Request Packet Data Structures
Structure of an IRP
The I/O Stack The "Standard Model" for IRP Processing
Creating an IRP
Forwarding to a Dispatch Routine
Duties of a Dispatch Routine
The StartIo Routine
The Interrupt Service Routine
Deferred Procedure Call Routine
I/O Completion Routines
Advanced Request Processing
Queuing I/O Requests
The DEVQUEUE object
Cancelling I/O Requests
Completing the Dispatch Routine
Day 3 Plug and Play for Function Drivers
Reading and Writing Data
Configuring Your Device
Addressing a Data Buffer
Specifying a Buffering Method
Ports and Registers
Port Resources
Memory Resources
Servicing an Interrupt
Configuring an Interrupt
Handling Interrupts
Deferred Procedure Calls
Developing WDF Drivers
Day 1 – Introduction to the WDF
Review of WDM driver architecture
WDM Concepts for WDF
Driver Types
Device and Driver Stacks
I/O Request Packets (IRPs)
Quick Introduction to WDF
Kernel Mode Driver Framework (KMDF)
User Mode Driver Framework (UMDF)
Differences between KMDF and UMDF
When to use KMDF and UMDF?
Examples of devices suitable for KMDF and UMDF
Requirements of A Simple WDF Driver
Code walkthrough of WDM and WDF drivers for comparison
Day 2 – The Kernel Mode Driver Framework
Interactions between the KMDF and drivers
Introducing the Basic KMDF Objects
Framework Object Lifecycle
The Object Context Space
Handling I/O Requests
Processing an I/O Request
Day 3 – The User Mode Driver Framework
Introducing the UMDF and benefits of UMDF drivers
Supported devices and device classes
Key Elements – Driver host process, Reflector, Driver Manager
