1 basic
In the device driver often see and platform related fields, distributed in many corners of the driver, this is also the 2.6 kernel of a more important mechanism, the principle of its understanding, for later analysis of the driver is very helpful, the following brief introduction: In the linux2.6 device model, care about the bus, the device, drive the three entities, the bus will be device and drive
FSB--front Side Bus (FSB) is the bus that connects the CPU to the North Bridge chip. Choose the motherboard and CPU, pay attention to the two collocation problem, in general, the front-end bus is determined by the CPU, if the motherboard does not support the CPU required front-end bus, the system can not work. That is,
Intel's QuickPath Interconnect technology is abbreviated as QPI, which translates to fast channel interconnection. In fact its official name is called the Csi,common System interface public interface, used to achieve direct interconnection between chips, rather than connecting to the North Bridge via FSB, directed at AMD's HT bus. Regardless of speed, bandwidth, the bandwidth of each stitch, power consumption and other specifications are beyond the HT
Preface: Otto Event Bus-the communication framework between components for the previous situation between the activity or fragment between the jump value is generally used bundle, intent, etc., from Activitya--- Activityb with StartActivity, with Startactivityforresult () can accept the latter to the former parameters and can do some updates UI and other operations. This is to determine which of the buttons from a jumps to B, set a unique identifier t
Many Ford and Mazda models (approximately since 2003-2004) is equipped with MS CAN bus, in addition to the regular HS CAN Bus. In contrast to HS can bus, MS can bus isn't supported by the stock ELM327, because Ms can is a manufacturer-specific solu tion and located on non-obd2 pins. However, ELM327 is very flexible too
Driven:Taking Sdio as an example, it uses Mmc_attach_sdio to match the driver and the device, and its essence is to match the Sdio_bus matching rules. In Mmc_attach_sdio, the MMC first matches a bus, that is, what bus to use for the MMC bus to process host. One thing to understand here is that in Sdio, for SD card memory MMC is a physical device, and for non-SD c
3. Sightseeing bus
(Bus.cpp/c/pas)"Problem description"The charming small city of Y City, has n a beautiful scenic spot. Because of the increasing number of visitors, Y City SpecialArranged a sightseeing bus, to provide more convenient transportation services for tourists. The sightseeing bus appears at 1 in the first 0 minutes.Attractions, followed by the 2, 3,
I believe that most of the fans are not unfamiliar to Alipay, in particular, the net to buy people, now Alipay in everyone's quick to use more and more widely used, and now it can be filled with bus cards, the following for everyone to pay the Po-filled bus card method, want to know how it can be filled with public transport cards to refer to.
Note: Mobile phones must be NFC, it is reported that at present
Registering a SDIO driver will call the following function:
/*** Sdio_register_driver-register a function driver* @drv: SDIO function Driver*/int sdio_register_driver (struct sdio_driver *drv){Drv->drv.name = drv->name;Drv->drv.bus = sdio_bus_type;Return Driver_register (DRV->DRV);}
In fact, very good understanding sdio_driver is actually driver encapsulation, and the driver bus for Sdio_bus_type. The drive of this device is very simple. Look at the s
Simulation of I2C bus multi-master communication research and Software Design
Author:■ Zheng Xuyang, Xi'an University of electronic science and technology, Li Bingbing, Huang Xinping
Abstract:This paper introduces the principle of multi-master communication simulating I2C bus, and proposes a new implementation method. This method uses delayed receiving comparison to implement arbitration, so that common Mic
I²C architecture is divided into three parts: I²c core, bus drive, device driverI²c Core :I²c Core provides a set of interface functions that do not depend on hardware, and the I²c-bus driver and device driver depend on the core of I²c as a link.(1) Add/Remove I2c_adapterint I2c_add_adapter (struct i2c_adapter *adap);int I2c_del_adapter (struct i2c_adapter *adap);(2) Add/Remove I2c_driverint i2c_register_dr
Common faults and solutions for computer bus interface once had such a statistical report: computer failure in 40% from the computer's bus interface! Since the computer is plugged together by a variety of accessories, it is difficult to ensure that each slot can work stably, such as this or that problem, although the search is cumbersome, but not surprising. Therefore, when you understand the impact of th
---- Any microprocessor must be connected to a certain number of components and peripheral devices. However, if each component and peripheral device are connected directly with a set of lines, the connection will be complicated and even difficult to implement. In order to simplify the design of hardware circuits and system structure, a group of lines are commonly used and configured to connect with components and peripheral devices with an appropriate interface circuit. This group of common conn
11389-the Bus Driver Problem
Time limit:1.000 seconds
Http://uva.onlinejudge.org/index.php?option=com_onlinejudgeItemid=8category=24page=show_problem problem=2384
In a city there are n bus drivers. Also There are n morning bus routes N afternoon bus routes with various lengths. Each driver is assigned one morning R
Each device on the IIC needs an address register to determine its own address.
Each device on the IIC needs an address register to determine its own address: Many devices are used to determine the address by hardware.Some in the factory when the address is set up, the user can not change, some identified several, the remaining several by the hardware to determine (for example, there are three users determined by the user, leaving 3 control address of the pin), this class more; There are address
The last time I talked about a client that was writing a RABBITMQ-based message bus in the face of concurrency problems and the final implementation of the solution. It's a simple and not prone to concurrency problem scenario, and if you read that article, I've given the pros and cons of the final implementation scenario.The core issue is whether client-created connection with RABBITMQ server is shared or exclusive. One more popular example of this pr
Last year wrote a relatively long SQL, although not how to write now. On the blog to commemorate a bit.Calculate the share rate of bus driving, the logic is as followsMorning 6 to 9 o'clock morning peak, night 16:30-19:30 late peak, the rest of the time flat peak.According to the number of passengers travelling on the Od five-minute bus (the number is calculated in the previous table), according to the peak
Requirements:Enter the bus line, example: 3 way. Get all of the 3-way car through the site name, first last train, fares.
How to solveThe bus line is also a poi. There are ready-made functions to get the line condition
How to solveMainly used in 3 classes, Poisearch Buslinesearch Buslineresult
Poisearch is based on the keyword to get poi details, not much to say, look through the document.
Buslinesearch is
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