bus alsa

The overall solution of a recent project was designed as a distributed system, so it struggled with the CAN bus or RS485 communication. Therefore, I searched some documents about RS485 and CAN bus on the Internet. In addition to further understanding of RS485 communication characteristics, I also learned the characteristics of CAN bus and its comparison with RS48

Last night, I started to check the LCD and found that the front bus was not very well mastered. Later I summarized the reasons: First, I understood the bus principle very early, and second, there was no big routine during bus learning, third, it was just returned from the Dragon Boat Festival holiday and it was not in the status. Forget it. If you don't have a re

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

Label: style blog HTTP color ar use SP strong data Reprinted please indicate the source: http://blog.csdn.net/lg2lh/article/details/8042008 The basic protocol of PCI is not introduced here. Because the General chip protocols are well integrated, I only need to know about them. I don't need to know the protocol too much because I don't have to do chips. The explanation here is based on the PLX 9054 (9052) chip. I am only a beginner and hope to criticize and correct it. I. Address in

About I2C and SPI bus protocols Iicvs SPI Currently, in the low-end digital communication application field, we can see IIC (Inter-Integrated Circuit) and SPI (serial peripheral interface) everywhere. The reason is that these two communication protocols are very suitable for close-range and low-speed chip communication. Philips (for IIC) and Motorola (for Spi) have developed these two standard communication protocols for different backgrounds and mark

Since the introduction of PCI bus, its unique characteristics have been favored by many vendors, which has become the mainstream of computer extension bus. At present, many domestic technical personnel have the ability to develop PCI bus interface equipment. However, the PCI bus programming technology, that is, the ope

1. Bus system structureThe system consists of a matrix consisting of multiple interconnected 32-bit AHB buses 8 Main bus –CORTEX-M4 with FPU core I-bus, D-bus and S-bus –dma1 memory bus –dma2 memory

Keywords: PCI bus configuration space Operating SystemSince the launch of PCI bus, it has been favored by many manufacturers with its unique characteristics and has become the mainstream of computer extended bus. At present, many technical personnel in China have the ability to develop PCI bus interface equipment. Howe

Even after four years of study in Wuhan, I feel that Wuhan is incomparable with Beijing in many aspects, such as city construction and quality. However, there is one aspect that Beijing envy, that's the speed of public transportation in Wuhan! Even when I see traffic congestion in Beijing, I miss it even more ......Take the bus 521 and catch up with another 521. At that time, some people reminded us to pay attention to safety. As a result, the driver

Bus Standard: It can be regarded as a standard interface between the system and each module, module and module.There are currently the following types:1.ISA, using a separate CPU bus clock, is IBM in order to adopt a full 16-bit CPU and launched. Thus the CPU can use a higher clock than the bus frequency, which is advantageous to the CPU performance improvement.

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

I2C bus Definition The I2C (Inter-Integrated Circuit) bus is a two-line serial bus developed by Philips to connect the microcontroller and its peripheral devices. The I2C bus was created in 1980s and was initially Audio and video devices Development is now mainly used in server management, including communicatio

Bus, English is called "buses", that is, our Chinese "public car", which is very image, for example, the route of the public car is certain, any of us can take a public car to the route of any one of the public car site. If we compare our people to electronic signals, this is why English is called "bus" instead of "car". Of course, from a professional point of view, the

From: http://blog.csdn.net/flowingflying/article/details/5411124 The D-bus method is very important in mobile phone operating systems, including Linux-based operating systems such as maemo and moblin. It is estimated that andriod is also widely used. For more information about D-bus, see:Http://www.freedesktop.org/wiki/Software/dbusThere is also a large amount of learning materials on the Internet.Http://

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

error is ' + iEr ROR); if (Ierror = = mkevent.error_permission_denied) {//Authorization key error: Toast.maketext (App.mDemoApp.getApplicationContext (), " File input Correct authorization key! ", Toast.length_long). Show (); App.mDemoApp.m_bKeyRight = false; @Override public void OnCreate () {log.v ("Bmapapidemoapp", "onCreate"); mdemoapp = this; Mbmapman = new BMapmanager (this); Mbmapman.init (This.mstrkey, New Mygenerallistener ()); Mbmapman.getlocationmanager (). Setnotifyinternal (10, 5);

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

With the rapid development of related technology and China's communication market, the main network of the mainstream SDH equipment rate has risen to 10G, and 2.5G SDH transmission equipment by these more high-end equipment extrusion, network application level began to move down, gradually into the edge layer, replacing the original in the edge of the 622M equipment. On the other hand, with the rapid growth of the bandwidth demand of data and Internet service, more and more requirements are put