Win32 device driver architecture
At present, due to the need to support new services and new types of PC external devices, it has created new challenges for driver development.
The new bus increases the number of devices and the demand for device drivers. The continuous increase of various functions on the device makes the drive
The development of mobile programs has become more and more complicated. At the same time, fast-acting interactive applications require tight software and hardware
Close together. In 1997, the unified Win32 driver model for Windows 95 and Windows NT
(WDM) has developed further, taking all these factors into account. WDM allows the use of a single driver
Sequence source (x86 binary) to implement support for new buses and new devices in both Windows 95 and Windows NT
.
The key goal of WDM is to simplify the development of drivers by providing a flexible way to enable new hardware support
On the basis of support, reduce and reduce the number and complexity of drivers that must be developed. WDM must also be plug and play and
The power management of the equipment provides a general framework structure. WDM is to achieve simple support and convenient use of new equipment
Key components.
To achieve these goals, WDM can only be based on a set of common services provided by the Windows NT I / O subsystem. WDM
Improves the functionality of a set of core extensions to achieve plug and play, device power management, and fast response I / O flow
stand by. In addition to general platform services and extensions, WDM also implements a modular, hierarchical type of microdrive
Dynamic program structure. Type drivers implement the functional interfaces required to support universal buses, protocols, or device classes.
The general characteristics of class drivers are the bus interface implementation required for logical device command settings, protocols, and code reuse
Now standardization provides the necessary conditions. WDM support for standard class interfaces reduces the need for Windows 95 and Windows NT
The number and complexity of device drivers.
Mini drivers allow the extension of generic class drivers to support specific device protocols or physical programming interfaces.
For example, a mini-driver can be used to extend the IEEE 1394 bus class driver for special
Support for the programming interface of the host controller. Mini drivers are very easy to develop because they can be
Extend the generic class driver interface function to achieve. Despite the simplicity of the microdriver design, the repeated use of the microdriver
The advantages brought by the type driver module can also be realized through the support of the standard device programming interface. USB host control
The controller interface (OpenHCI or UHCI) is an example of this.
Modular WDM architecture with flexible and unified interface allows the operating system to dynamically configure different device driver modules
Block to support specific devices. Modular WDM architecture with flexible and unified interface allows the operating system to be dynamically configured
Different driver modules to support specific devices. A typical driver stack consists of common devices, protocols,
It is composed of a bus-type driver program connected with a mini-driver program of a specific protocol and a specific bus. For example, the operating system
A driver stack can be configured to support such a camera, its commands are defined with the image class, and
It is published based on the Functional Control Protocol (FCP) class from the IEEE 1394 bus class. This flexibility also makes it
It can easily support a multi-function device, simply implement a mini-driver to connect the multi-function hardware with
Interfaces of several device classes are connected. Dynamically constructing the WDM driver stack is the key to plug and play device support.
The WDM service makes it possible to implement a rapid response model for Windows NT and Windows 95. WDM provides
Multiple execution priorities include core state and non-core state threads, IRQ level, and deferred program call (DPC).
All WDM classes and micro-drivers are used as privileged threads in the core state (layer 0) (will not be used by the CPU scheduler)
Interrupt) execution. 32 IRQ levels can be used to prioritize hardware interrupt service. For each interrupt, the DPC is
Wait in the queue and wait until the interrupted IRQ service routine is completed before executing. DPCs are disabled by effectively reducing interrupts
The time, the system's response to the interruption has been greatly improved. For x86 based PC systems using multiple processors
Support for interrupts under Windows NT is based on Intel ’s multiprocessor specification version 1.4.
For applications that require active multimedia, WDM provides a fast-reacting interface in the core state to handle I / O streams.
The WDM streaming interface is provided through the standard WDM type interface. For WDM, a multimedia stream can use one
Or multiple software filters and device drivers to deal with. In order to speed up the processing of I / O streams, WDM streams can directly
Hardware access, to avoid the delay caused by the conversion between the non-core state and the core state, and also save
Take the need for intermediate I / O buffers.
To take full advantage of the advantages provided by WDM, it is recommended that you use plug-and-play compatible power management inputs, sound, graphics, and
Storage peripherals using USB and IEEE 1394.
The WDM driver can coexist with the existing Windows NT driver on Windows NT or on Windows
Coexist with existing Windows 95 drivers on 95. The existing Windows NT and Windows 95 drivers will
It continues to be supported, but the advanced advantages of WDM cannot be used. The extensible WDM class driver provided by Microsoft is
The best choice to support new devices. Before starting to develop a new WDM class driver, hardware developers should consult
Microsoft to obtain support information for specific device classes. Once possible, use only once to write class drivers
, And then use the WDM mini-driver to expand it into a driver method for a specific hardware interface.
At present, due to the need to support new services and new types of PC external devices, it has created new challenges for driver development.
The new bus increases the number of devices and the demand for device drivers. The continuous increase of various functions on the device makes the drive
The development of mobile programs has become more and more complicated. At the same time, fast-acting interactive applications require tight software and hardware
Close together. In 1997, the unified Win32 driver model for Windows 95 and Windows NT
(WDM) has developed further, taking all these factors into account. WDM allows the use of a single driver
Sequence source (x86 binary) to implement support for new buses and new devices in both Windows 95 and Windows NT
.
The key goal of WDM is to simplify the development of drivers by providing a flexible way to enable new hardware support
On the basis of support, reduce and reduce the number and complexity of drivers that must be developed. WDM must also be plug and play and
The power management of the equipment provides a general framework structure. WDM is to achieve simple support and convenient use of new equipment
Key components.
To achieve these goals, WDM can only be based on a set of common services provided by the Windows NT I / O subsystem. WDM
Improves the functionality of a set of core extensions to achieve plug and play, device power management, and fast response I / O flow
stand by. In addition to general platform services and extensions, WDM also implements a modular, hierarchical type of microdrive
Dynamic program structure. Type drivers implement the functional interfaces required to support universal buses, protocols, or device classes.
The general characteristics of class drivers are the bus interface implementation required for logical device command settings, protocols, and code reuse
Now standardization provides the necessary conditions. WDM support for standard class interfaces reduces the need for Windows 95 and Windows NT
The number and complexity of device drivers.
Mini drivers allow the extension of generic class drivers to support specific device protocols or physical programming interfaces.
For example, a mini-driver can be used to extend the IEEE 1394 bus class driver for special
Support for the programming interface of the host controller. Mini drivers are very easy to develop because they can be
Extend the generic class driver interface function to achieve. Despite the simplicity of the microdriver design, the repeated use of the microdriver
The advantages brought by the type driver module can also be realized through the support of the standard device programming interface. USB host control
The controller interface (OpenHCI or UHCI) is an example of this.
Modular WDM architecture with flexible and unified interface allows the operating system to dynamically configure different device driver modules
Block to support specific devices. Modular WDM architecture with flexible and unified interface allows the operating system to be dynamically configured
Different driver modules to support specific devices. A typical driver stack consists of common devices, protocols,
It is composed of a bus-type driver program connected with a mini-driver program of a specific protocol and a specific bus. For example, the operating system
A driver stack can be configured to support such a camera, its commands are defined with the image class, and
It is published based on the Functional Control Protocol (FCP) class from the IEEE 1394 bus class. This flexibility also makes it
It can easily support a multi-function device, simply implement a mini-driver to connect the multi-function hardware with
Interfaces of several device classes are connected. Dynamically constructing the WDM driver stack is the key to plug and play device support.
The WDM service makes it possible to implement a rapid response model for Windows NT and Windows 95. WDM provides
Multiple execution priorities include core state and non-core state threads, IRQ level, and deferred program call (DPC).
All WDM classes and micro-drivers are used as privileged threads in the core state (layer 0) (will not be used by the CPU scheduler)
Interrupt) execution. 32 IRQ levels can be used to prioritize hardware interrupt service. For each interrupt, the DPC is
Wait in the queue and wait until the interrupted IRQ service routine is completed before executing. DPCs are disabled by effectively reducing interrupts
The time, the system's response to the interruption has been greatly improved. For x86 based PC systems using multiple processors
Support for interrupts under Windows NT is based on Intel ’s multiprocessor specification version 1.4.
For applications that require active multimedia, WDM provides a fast-reacting interface in the core state to handle I / O streams.
The WDM streaming interface is provided through the standard WDM type interface. For WDM, a multimedia stream can use one
Or multiple software filters and device drivers to deal with. In order to speed up the processing of I / O streams, WDM streams can directly
Hardware access, to avoid the delay caused by the conversion between the non-core state and the core state, and also save
Take the need for intermediate I / O buffers.
To take full advantage of the advantages provided by WDM, it is recommended that you use plug-and-play compatible power management inputs, sound, graphics, and
Storage peripherals using USB and IEEE 1394.
The WDM driver can coexist with the existing Windows NT driver on Windows NT or on Windows
Coexist with existing Windows 95 drivers on 95. The existing Windows NT and Windows 95 drivers will
It continues to be supported, but the advanced advantages of WDM cannot be used. The extensible WDM class driver provided by Microsoft is
The best choice to support new devices. Before starting to develop a new WDM class driver, hardware developers should consult
Microsoft to obtain support information for specific device classes. Once possible, use only once to write class drivers
, And then use the WDM mini-driver to expand it into a driver method for a specific hardware interface.
At present, due to the need to support new services and new types of PC external devices, it has created new challenges for driver development.
The new bus increases the number of devices and the demand for device drivers. The continuous increase of various functions on the device makes the drive
The development of mobile programs has become more and more complicated. At the same time, fast-acting interactive applications require tight software and hardware
Close together. In 1997, the unified Win32 driver model for Windows 95 and Windows NT
(WDM) has developed further, taking all these factors into account. WDM allows the use of a single driver
Sequence source (x86 binary) to implement support for new buses and new devices in both Windows 95 and Windows NT
.
The key goal of WDM is to simplify the development of drivers by providing a flexible way to enable new hardware support
On the basis of support, reduce and reduce the number and complexity of drivers that must be developed. WDM must also be plug and play and
The power management of the equipment provides a general framework structure. WDM is to achieve simple support and convenient use of new equipment
Key components.
To achieve these goals, WDM can only be based on a set of common services provided by the Windows NT I / O subsystem. WDM
Improves the functionality of a set of core extensions to achieve plug and play, device power management, and fast response I / O flow
stand by. In addition to general platform services and extensions, WDM also implements a modular, hierarchical type of microdrive
Dynamic program structure. Type drivers implement the functional interfaces required to support universal buses, protocols, or device classes.
The general characteristics of class drivers are the bus interface implementation required for logical device command settings, protocols, and code reuse
Now standardization provides the necessary conditions. WDM support for standard class interfaces reduces the need for Windows 95 and Windows NT
The number and complexity of device drivers.
Mini drivers allow the extension of generic class drivers to support specific device protocols or physical programming interfaces.
For example, a mini-driver can be used to extend the IEEE 1394 bus class driver for special
Support for the programming interface of the host controller. Mini drivers are very easy to develop because they can be
Extend the generic class driver interface function to achieve. Despite the simplicity of the microdriver design, the repeated use of the microdriver
The advantages brought by the type driver module can also be realized through the support of the standard device programming interface. USB host control
The controller interface (OpenHCI or UHCI) is an example of this.
Modular WDM architecture with flexible and unified interface allows the operating system to dynamically configure different device driver modules
Block to support specific devices. Modular WDM architecture with flexible and unified interface allows the operating system to be dynamically configured
Different driver modules to support specific devices. A typical driver stack consists of common devices, protocols,
It is composed of a bus-type driver program connected with a mini-driver program of a specific protocol and a specific bus. For example, the operating system
A driver stack can be configured to support such a camera, its commands are defined with the image class, and
It is published based on the Functional Control Protocol (FCP) class from the IEEE 1394 bus class. This flexibility also makes it
It can easily support a multi-function device, simply implement a mini-driver to connect the multi-function hardware with
Interfaces of several device classes are connected. Dynamically constructing the WDM driver stack is the key to plug and play device support.
The WDM service makes it possible to implement a rapid response model for Windows NT and Windows 95. WDM provides
Multiple execution priorities include core state and non-core state threads, IRQ level, and deferred program call (DPC).
All WDM classes and micro-drivers are used as privileged threads in the core state (layer 0) (will not be used by the CPU scheduler)
Interrupt) execution. 32 IRQ levels can be used to prioritize hardware interrupt service. For each interrupt, the DPC is
Wait in the queue and wait until the interrupted IRQ service routine is completed before executing. DPCs are disabled by effectively reducing interrupts
The time, the system's response to the interruption has been greatly improved. For x86 based PC systems using multiple processors
Support for interrupts under Windows NT is based on Intel ’s multiprocessor specification version 1.4.
For applications that require active multimedia, WDM provides a fast-reacting interface in the core state to handle I / O streams.
The WDM streaming interface is provided through the standard WDM type interface. For WDM, a multimedia stream can use one
Or multiple software filters and device drivers to deal with. In order to speed up the processing of I / O streams, WDM streams can directly
Hardware access, to avoid the delay caused by the conversion between the non-core state and the core state, and also save
Take the need for intermediate I / O buffers.
To take full advantage of the advantages provided by WDM, it is recommended that you use plug-and-play compatible power management inputs, sound, graphics, and
Storage peripherals using USB and IEEE 1394.
The WDM driver can coexist with the existing Windows NT driver on Windows NT or on Windows
Coexist with existing Windows 95 drivers on 95. The existing Windows NT and Windows 95 drivers will
It continues to be supported, but the advanced advantages of WDM cannot be used. The extensible WDM class driver provided by Microsoft is
The best choice to support new devices. Before starting to develop a new WDM class driver, hardware developers should consult
Microsoft to obtain support information for specific device classes. Once possible, use only once to write class drivers
, And then use the WDM mini-driver to expand it into a driver method for a specific hardware interface.
At present, due to the need to support new services and new types of PC external devices, it has created new challenges for driver development.
The new bus increases the number of devices and the demand for device drivers. The continuous increase of various functions on the device makes the drive
The development of mobile programs has become more and more complicated. At the same time, fast-acting interactive applications require tight software and hardware
Close together. In 1997, the unified Win32 driver model for Windows 95 and Windows NT
(WDM) has developed further, taking all these factors into account. WDM allows the use of a single driver
Sequence source (x86 binary) to implement support for new buses and new devices in both Windows 95 and Windows NT
.
The key goal of WDM is to simplify the development of drivers by providing a flexible way to enable new hardware support
On the basis of support, reduce and reduce the number and complexity of drivers that must be developed. WDM must also be plug and play and
The power management of the equipment provides a general framework structure. WDM is to achieve simple support and convenient use of new equipment
Key components.
To achieve these goals, WDM can only be based on a set of common services provided by the Windows NT I / O subsystem. WDM
Improves the functionality of a set of core extensions to achieve plug and play, device power management, and fast response I / O flow
stand by. In addition to general platform services and extensions, WDM also implements a modular, hierarchical type of microdrive
Dynamic program structure. Type drivers implement the functional interfaces required to support universal buses, protocols, or device classes.
The general characteristics of class drivers are the bus interface implementation required for logical device command settings, protocols, and code reuse
Now standardization provides the necessary conditions. WDM support for standard class interfaces reduces the need for Windows 95 and Windows NT
The number and complexity of device drivers.
Mini drivers allow the extension of generic class drivers to support specific device protocols or physical programming interfaces.
For example, a mini-driver can be used to extend the IEEE 1394 bus class driver for special
Support for the programming interface of the host controller. Mini drivers are very easy to develop because they can be
Extend the generic class driver interface function to achieve. Despite the simplicity of the microdriver design, the repeated use of the microdriver
The advantages brought by the type driver module can also be realized through the support of the standard device programming interface. USB host control
The controller interface (OpenHCI or UHCI) is an example of this.
Modular WDM architecture with flexible and unified interface allows the operating system to dynamically configure different device driver modules
Block to support specific devices. Modular WDM architecture with flexible and unified interface allows the operating system to be dynamically configured
Different driver modules to support specific devices. A typical driver stack consists of common devices, protocols,
It is composed of a bus-type driver program connected with a mini-driver program of a specific protocol and a specific bus. For example, the operating system
A driver stack can be configured to support such a camera, its commands are defined with the image class, and
It is published based on the Functional Control Protocol (FCP) class from the IEEE 1394 bus class. This flexibility also makes it
It can easily support a multi-function device, simply implement a mini-driver to connect the multi-function hardware with
Interfaces of several device classes are connected. Dynamically constructing the WDM driver stack is the key to plug and play device support.
The WDM service makes it possible to implement a rapid response model for Windows NT and Windows 95. WDM provides
Multiple execution priorities include core state and non-core state threads, IRQ level, and deferred program call (DPC).
All WDM classes and micro-drivers are used as privileged threads in the core state (layer 0) (will not be used by the CPU scheduler)
Interrupt) execution. 32 IRQ levels can be used to prioritize hardware interrupt service. For each interrupt, the DPC is
Wait in the queue and wait until the interrupted IRQ service routine is completed before executing. DPCs are disabled by effectively reducing interrupts
The time, the system's response to the interruption has been greatly improved. For x86 based PC systems using multiple processors
Support for interrupts under Windows NT is based on Intel ’s multiprocessor specification version 1.4.
For applications that require active multimedia, WDM provides a fast-reacting interface in the core state to handle I / O streams.
The WDM streaming interface is provided through the standard WDM type interface. For WDM, a multimedia stream can use one
Or multiple software filters and device drivers to deal with. In order to speed up the processing of I / O streams, WDM streams can directly
Hardware access, to avoid the delay caused by the conversion between the non-core state and the core state, and also save
Take the need for intermediate I / O buffers.
To take full advantage of the advantages provided by WDM, it is recommended that you use plug-and-play compatible power management inputs, sound, graphics, and
Storage peripherals using USB and IEEE 1394.
The WDM driver can coexist with the existing Windows NT driver on Windows NT or on Windows
Coexist with existing Windows 95 drivers on 95. The existing Windows NT and Windows 95 drivers will
It continues to be supported, but the advanced advantages of WDM cannot be used. The extensible WDM class driver provided by Microsoft is
The best choice to support new devices. Before starting to develop a new WDM class driver, hardware developers should consult
Microsoft to obtain support information for specific device classes. Once possible, use only once to write class drivers
, And then use the WDM mini-driver to expand it into a driver method for a specific hardware interface.
Optical Rotary Sensor,Custom Encoder,Optical Encoder 6Mm Shaft,Handwheel Pulse Generator
Jilin Lander Intelligent Technology Co., Ltd , https://www.jllandertech.com