spi can bus

What does the bus do? Plainly, it is used to transfer data between parts of the computer. For example, my main memory stored in the data CPU to use, need a line to pass it, the CPU internal registers between, register and Alu, CU and various parts and so on, and so on many places, in short, the parts need to transfer data The transmitted data is divided into three kinds, corresponding to three kinds of functions of the

MCP2515 IntroductionMCP2515 is an independent can bus communication controller, is the first microchip company independent can solution upgrade device, its transmission capacity is more than microchip company original can controller (MCP2510) twice times, the highest communication rate can reach 1Mbps. The MCP2515 can receive and transmit standard data frames and extended data frames as well as remote frames, eliminating extraneous messages through tw

===============================This article is the original site, welcome to reprint!Reprint please indicate the source: http://www.cnblogs.com/gdt-a20 =============================== 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

Hibernate to carry on the data access, DataSource actually is sessionfactory, The implementation of TransactionManager is Hibernatetransactionmanager. According to the different agent mechanism, the configuration of five kinds of spring transactions is summarized, and the configuration file is as follows: The first way: Each bean has a proxy Second way: All beans share a proxy base class Third Way: Using interceptors Fourth way: In

Springcloud (ix): Configuration Center and message bus (configuration center finalization)In Springcloud (vii): Configuration Center svn example and refresh, refresh we can use the mechanism of Webhook to flush the client each time the client gets the latest configuration information if it needs to be executed, and when clients are getting more and more , which requires each client to be executed again, this scenario is less appropriate. Using spring

I became a blog expert after finishing the original embedded Linux Series blog post, now launched to let more readers benefit."Understanding the Linux series from a demand perspective: bus, device, and drive" is a methodological article on how to learn embedded Linux systems, and the beginning of understanding Linux system software from the perspective of demand, expecting this series of articles to be the benchmark for learning Embedded Linux in the

A real Linux Device and driver usually need to be attached to a bus. This is naturally not a problem for devices that are attached to PCI, USB, IIC, and SPI. However, in an embedded system, the independent peripheral controller integrated in the SoC system and peripherals attached to the SOC memory space are not attached to this type of bus. Based on this backgro

Since I bought a car, I seldom take the bus. However, the perception of the bus for a long time, these daily Mercedes-Benz in the city on the road of the big guys, year after day, without a clear say to carry who on the road, but does not affect them always on schedule from the starting point, shun smooth to reach the end. Share a little bit about bus and softwar

-speed standards. The Sdio card requires only SPI and 1-bit SD transfer mode. The target application for low speed cards is to support low-speed I/O capabilities with minimal hardware overhead, and low-speed cards support applications such as modems, bar scanners, and GPS receivers. Full speed and 4BIT operation are mandatory for both the card memory and the SDIO portion of the combo card.In the SDIO device of the non-combination card, its maximum spe

requires downgrading. Therefore, the fclk frequency is reduced to pclk and hclk by the divider. How can we reduce the workload? You can use the clkdivn Sub-division control register to control the sub-division.For example, when clkdivn is assigned 0x5, that is, fclk: hclk: pclk = 400 MHz: 100 MHz: 50 MHz.There are two peripheral clock types for S3C2440: pclk and hclk.Peripherals using pclk include: wdt, IIS, I2C, PWM timer, MMC interface, ADC, UART, gpio, RTC and

In the device-driven model of the kernel, the three entities are concerned with the bus, device, and drive.When the system registers a device, the bus looks for the matching driver, and the bus will look for the matching device when the system is registered with each driver.A realistic Linux device and driver usually need to be mounted on a

Absrtact: This paper introduces the interaction and coupling problems in the process of informatization construction of modern enterprises, expounds the solution of service-oriented enterprise application--ESB Enterprise Service Bus, gives the detailed design of this solution, and presents the implementation example. Keywords: service oriented; enterprise solution; Enterprise Service Bus Middle Figure categ

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

Simple Bus transfer algorithm: Three tables (most simplistic, do not consider fuzzy query, one-way street and other things):1, the Site table Stop (stop_id,stop_name)2, route table line (line_id,line_name)3, Route site table (point line Relational table) Linestops (line_id, stop_id, seq) the SEQ here refers to the order of a site in a line. Now analyze the algorithm:1, Direct LineFirst of all, according to two site names to obtain the respective IDs o

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

Some time ago to implement a RABBITMQ message bus, the implementation of the process itself is also constantly have to think, summarize and revise. You need to consider the various dimensions: efficiency, performance, network, throughput, and even the ability to envision the possible use of the API scenarios, patterns. But can have one thing, oneself willing to do, walk, eat, take a bus when all thinking ho

Four drive units: the D-bus bus and S-bus bus for the CONTEXT-M3 core, the Universal DMA1, and the general purpose DMA2. Four driven units: internal Flash (internal Mountain village memory), internal SRAM, FSMC, AHB to APB Bridge Ahp2apbx. The Icode bus is the

Forwarded from: http://blog.sina.com.cn/s/blog_4af327e10101irie.htmladvantages and disadvantages of D-busLinux does not have a good IPC mechanism. Windows, Mac OS, Android also has "binder" subsystem. Linux has sockets, FIFO, shared memory and other mechanisms, which are not very good for the application layer. Kdbus attempts to create a mechanism that is similar to other systems for Linux.D-bus is the closest approach to this standard on Linux. Pros:

I²C transmits data between devices connected to the bus using only two lines (SDA and SCL). Each device is identified by a unique address (whether it is a microprocessor, LCD driver, memory, or keyboard interface) and can be used as a transmitter or receiver depending on the function of the device. The LCD driver may be just a receiver, and the memory can send and receive data. In addition to transmitters and receivers, the device can be used as a hos

Loaded from http://blog.csdn.net/sjwangjinbao/article/details/6077225When writing a bus device driver, it was found that the struct device in the 2.6.33.2 kernel had no members of BUS_ID, and the const char *init_name member was found. However, this member cannot be used directly to set and read the device name.The method for kernel operation is dev_name and Dev_set_name. The definition in the kernel is:1) dev_nameStatic inline const char *dev_name (c