aiptek drivers

Reprint! Adding drivers to the Android kernel is actually adding drivers to the Linux kernel. Mainly in two files add point information, one is the Kconfig file, and the other is a makefile file. For example, you add the driver of your code into the drivers directory under the XXX directory, then repair in the directory of Kconfig files and makefile files.Specifi

How do I practice writing drivers and developing BSP after I buy a development board? (Author: wogoyixikexie @ gliet) How do I practice writing drivers and developing BSP after I buy a development board? (Author: wogoyixikexie @ gliet) ---------- A newcomer asked questions at the csdn Forum Recently I want to buy a 2440 Development Board. To learn about embedded development of wince, I still have a few ques

car, why are they all crowded at the door?"A driver said that if he saw a suspicious person on the bus, he would shout out "Ask the passengers behind him to give a seat to the elderly or pregnant women" or "do not litter the passengers behind him ". If there are elderly people, pregnant women, or people who litter on the car, the passengers still feel quite normal. If there is no such situation, the passengers may still feel "this driver is faulty" when looking around ".In addition to these whi

Recently, I have been reading books and learning about Linux device drivers. I am getting started with the simplest character device drivers and can have a macro understanding of the driver framework and functions of various elements. The following is a detailed analysis of the device driver with the first character I have written. I will sort out some basic driver knowledge to deepen my impression. First,

1.1 In object-oriented programming, the device driver core layer and examples can define a base class for a class of similar things, and specific things can inherit the functions in this base class. If the implementation of a function of the inherited object is the same as that of the base class, it can directly inherit the functions of the base class. On the contrary, it can be overloaded. This object-oriented design method greatly improves the code reusable ability and is a good display of the

1. Get the kernel version When the device driver needs to support different kernel versions at the same time, in the compilation phase, the kernel module needs to know the version of the currently used kernel source code to use the corresponding kernel API. In the 2.4 and 2.6 kernels, the source code header file Linux/version. H is defined as follows: Linux_version_code: the binary representation of the kernel version. Each of the primary, slave, and revision versions corresponds to one byte; Ke

: devices and drivers. Devices includes all devices in the system that belong to the bus. Drivers contains all drivers of the bus in the system. Class: classifies devices in the system by function. Devices: This Directory provides the device topology in the system. Dev: View of the registered device nodes in this directory. Kernel: Related Parameters in the kerne

/drivers/usb/storage/makefile## Makefile for the USB Mass Storage device drivers.## Christoph Hellwig # rewritten to use lists instead of if-statements.#Ccflags-y: =-idrivers/scsiobj-$ (config_usb_uas) + = UAS.Oobj-$ (config_usb_storage) + = USB-STORAGE.OTake a good look at the following price-related documents startUsb-storage-y: = scsiglue.o PROTOCOL.O transport.o usb.oUsb-storage-y + = INITIALIZERS.O sie

Scenario Description: In compiling the kernel source code, the following problems appear:CHK Include/linux/version.hCHK include/linux/utsrelease.hSYMLINK Include/asm-Include/asm-x86Call scripts/checksyscalls.shCHK include/linux/compile.hCC DRIVERS/GPIO/BT8XXGPIO.OCc1:warnings being treated as errorsDRIVERS/GPIO/BT8XXGPIO.C: In the function ' Bt8xxgpio_remove ':drivers/gpio/bt8xxgpio.c:246: Error: Ignore ret

embedded environment may have multiple RTC coresChip.The old RTC Drive is a simple character device driver that is adapted to the PC platform and should have a/DEV/RTC device file.Under the new RTC Subsystem Framework, the application accesses the RTC chip via the/DEV/RTC[0-N] device. These accesses areThe interface provided by the RTC-DEV.C provides indirect access to the RTC chip driver provided by the RTC-XXX.C. Common operations have read/set time operations,This each RTC chip must support

Linux-driven work and access is one of the highlights of Linux, and has been widely praised by the industry. The Linux system maps each driver into a single file. These files are called device files or drive files.To write a Linux driver:First step: Build Linux driver skeleton (load and unload Linux drivers)Step two: Register and unregister the device filesStep three: Specify driver-related informationFourth step: Specify the callback functionFifth st

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 device. (Plainly, the driver does not have any implementation details that are invisible to the application in addition to providing a specific interface to the outside.) The action

Learning device driver Programming also has a period of time, also wrote a few drivers, so there are some new understanding and understanding of the device driver, summed up. Learning device-driven programming has also been a while, and several drivers have been written. So there are some new understanding and understanding of the device driver, summarize.★ What is a driverWhen I first started learning abou

Learning device driver Programming also has a period of time, also wrote a few drivers, so there are some new understanding and understanding of the device driver, summed up. Learning device driver Programming also has a period of time, also wrote a few drivers, so there are some new understanding and understanding of the device driver, summed up.★ What is a driverWhen I first started learning about device

up Linux device driver Development related content: Armlinux working mode.SVC (Management) mode, USR mode;usr mode switches to svc mode. switching through software interrupts;When the code is running in USR mode, the software corresponds to the user space;When the code is running in SVC mode, the software runs in the kernel space. User space and kernel space:User space:Included software: application (software), C library, its own encapsulation of the production of dynamic libraryCPU mode of ope

first, what is the driver According to Baidu Encyclopedia: driver, English name is "Device Driver", all called "Device Driver", is a kind of special program that can make computer and equipment communicate, can say the interface of hardware, the operating system can control the work of hardware equipment only through this interface, If a device driver is not properly installed, it will not work properly. Therefore, the driver is known as "the soul of the Hardware", "The Master of Hardware", and

do, I have to pay 380 yuan a day, and the fuel fee is about 210 yuan. 17 hours a day, the average fixed cost of 22 yuan per hour, handed over to the company, an average of 12.5 yuan per hour oil fee. Is this 34.5 Yuan ?", I was surprised. I took a taxi for 10 years and heard a taxi driver calculate the cost for the first time. The previous drivers told me that the cost per kilometer is 0.3 yuan, and the amount of money paid every day is similar. "The

existing devices will be registered, but there are also special circumstances. For example, the kernel may need to work with an external network adapter that is not on the board, or controllers that are not attached to any bus.In general, the firmware Startup Process outputs a table of all devices on the board. If this table is not available, the only way to establish the correct device using the system startup code is to compile a kernel for a specific board. This board-specific kernel is wide

-hour drive at a cost of 34.5 yuan per hour ......" "How to calculate it ?" I asked. "You do, I have to pay 380 yuan a day, and the fuel fee is about 210 yuan. 17 hours a day, the average fixed cost of 22 yuan per hour, handed over to the company, an average of 12.5 yuan per hour oil fee. Is this 34.5 Yuan ?", I was surprised. I took a taxi for 10 years and heard a taxi driver calculate the cost for the first time. The previous drivers told me tha

In the Linux kernel, The framebuffer (POST buffer) driver is the display driver standard. framebuffer abstracts the display device as the POST buffer. After the user maps the memory to the process address space, you can directly perform read/write operations, and write operations can be immediately displayed on the screen. Related display drivers and interfaces are available in Linux kernel/Linux/Drivers/Vi