Recently, I have been drum up the lnux character device driver. I have collected various code and comments about the linux device driver on the internet, either for 2.4 or errors, and I cannot run it successfully, I really hope that you can carefully check the correctness of the code when posting a blog. In particular,
Character Device Driver instance
With the foundation of the previous section, I will learn how to compile a character device driver and test it on the client to verify whether the character device driver has been created success
devices in the Linux kernelFor the connection on the specific bus external devices have a struct device corresponding, such as platform equipment has platform_device corresponding to it, which platform_device structure is as follows: struct Platform_device {
const char * name; Device name to match the name of the driver and, if successful, into the driven probe f
Registry to activate the driver checker. Use verifier.exethis is the first option to activate the driver checker (verifier.exe exists in every copy of Windows2000 and can be installed in the System32 folder ). Verifier.exe has command line and graphical user interface (GUI), so you can specify the driver and authenticate the level as appropriate. You can also pa
/********************
* Character device driver
********************/
(1) Character device driver Introduction
A character device is a device that is accessed by a byte stream and is called a character
If I can't accompany you to the end
Do you regret that we were holding hands
If I hadn't met you
Now, I
Where to stay
All love is an adventure.
That would be willingly.
Waiting for all the suspense in our lives
My passionately devoted lover.
She's my lover.
The love she gave me was like
The morning with the dew
How I want to give her my true
My dearly Beloved.
I want to be lonely for her
Like the night is deep
This chapte
desktops, virtual cloud desktops and the like.Therefore, for virtual cloud Desktop developers, the solution of remote access to local devices is also one of the basic and important issues.Look at an example that is unfamiliar to the average person and familiar to iOS developers,iOS app installation problem, very annoying, unlike Windows programs, as long as the development, can be copied everywhere, run everywhere.Self-developed app, need to deploy the Xcode development environment to the mobil
The MQ-2 Smoke gas sensor module is driven on the X210v3 Development Board.It is now necessary to drive a MQ-2 smoke gas sensor module. After detecting smoke exceeding a certain standard, it will return a different level, similar to the key driver.But when writing the driver, you need to use the Gph2_3 number PIN. However, the Ioremap address is then configured in the kernel, and it is not possible to control the GPIO or enter the interrupt.It was lat
LDD folder appears in/sys/bus, which contains two directories: devices and drivers */If (RET) return ret; If (bus_create_file ( ldd_bus_type, bus_attr_version )) /* Add the bus attribute. The version attribute file */printk (kern_notice "unable to create version attribute will appear in the/sys/bus/LDD directory! \ N "); ret = device_register ( ldd_bus);/* register the bus as a device. Because the bus can also be a
First, we know that the driver is part of the kernel, so what role does the driver play in the kernel?The role of the device driver in the kernel: they are separate "black boxes" that enable a particular hardware to respond to a well-defined internal programming interface that completely hides the work details of the
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The kernel developer will be the bus, device, drive the three are abstracted from the software idea, cleverly established the relationship between the two, make it more visualization. Combined with the knowledge that we have learned before, in general, the relationship b
The city I miss is dusk
Why do I always passionately devoted to you
Once gave me happiness also gave me trauma
Once gave me hope and gave me despair
I'm in a strange crowd in a faraway city
Feel your Distant sorrow
My fantasies.
Your sorrow, like my despair, so long,,,, this is today's melody, straight into the bottom of my heart ~~~~~~~~~~~~~~~~In the Linux system, the I²c drive consists of 3 parts, namely, the I²c core, the I²c bus drive and the I²C
From one point of view, the role of a device driver is to provide a mechanism, not a policy.When writing drivers, the program ape should pay particular attention to the following basic concept: When writing kernel code to access hardware, do not impose any specific policy on the user. Because different users have different needs, the driver should handle the prob
Linux provides a set of functions to handle the PCI configuration block. Before a PCI device can be used, the Linux driver needs to determine the specific parameters of the device from the information in the PCI device configuration block, making the relevant settings so that the PCI
Kernel 2.6.29.4 USB devices are actually complicated, but the Linux Kernel provides a subsystem called USB core to handle most of the complicated work. Therefore, the interface between the driver and USB core is described here.In the USB device organization structure, there are four layers: device, config, interface, and endpoint.A brief description of these four
Transferred from: http://blog.csdn.net/bonnshore/article/details/7979705Written in the previous words:Bloggers opened a new personal site: You can also see this article here, click to open the linkThis article is a blogger learning Linux drive transplant after a full two weeks through the access to data and some of their own observations to do some of the records, designed as a future review materials, because bloggers have not much experience in the text may appear some fallacy, hope to see the
driver isDevice_driverHowever, for ease of use, the platform device has another encapsulation structure.Platform_driver. The driver registration function used in a common driver isDriver_register ()The encapsulated product on the device platform isPlatform_driver_register (
http://blog.csdn.net/zqixiao_09/article/details/50888795
We have learned the theoretical knowledge of platform devices in front of Linux device driver development--platform device driver, the following will be an example to delve into our learning.
first, the platform driven work process
Platform model-driven program
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