i2c bus

Introduction"Everything is flowing, nothing lasts." Everything melts, nothing is fixed "-Heraclitus (Heracleitus)In about 2003 years, the concept of SOA gradually entered the field of vision, and at one time people happily published their own views of SOA. SOA has become a hot topic for practitioners in the IT industry, especially in the fields of software development and system integration. Many authorities are also predicting the wonderful prospects of SOA, for example, Gartner predicts that b

Now we have many identities on the Internet. For example, I have three or four MSN accounts, QQ, GTalk, and web-based blogs and vblogs, in short, there are many. For small-sized mobile phones and MID-sized handheld devices, we cannot open N clients and N webpages like desktop. In fact, we don't care about the software we are using, we only want to find the contact. D-Bus provides the basis for IPC communication. Many mechanisms are built on D-

Windows Azure Platform Family of articles Catalog　　Readers familiar with the author's article understand that Azure offers two different ways of queue Message Queuing:1.Azure Storage QueueFor details, refer to:Windows Azure Cloud Service (PAAs) Web Role, Worker Role, Azure Storage Queue (bottom)　The Azure Storage queue provides the underlying Message Queuing service, such as AddMessage, DeleteMessage.Azure Storage Queue message capacity is 64KB (KB when using BASE64 encoding) with a maximum capa

Perhaps some users know, Huawei mobile phone official microblogging issued Huawei Mate9 can when the text of the bus card, Huawei users excited, Huawei Mate9 how to be a bus card? What is the relevant operation? Take a look at Huawei Mate9 when the bus card set Tutorial! Huawei Mate9 when bus card setup Tutorial: H

On-Chip Bus Wishbone Learning (6) bus cycle operation initiation A bus cycle consists of at least one bus operation. The operation is always initiated by the master device. The operation initiated by the master device can be a single read/write, block read/write, or rmw operation. When the master device sets cyc_o to

implementation of the adapter side of the I²C hardware architecture The adapter can be controlled by the CPU and can even be integrated directly inside the CPU.3) i²c device driverI²c device driver mainly includes the data structure I2c_driver and i2c_client, we need to implement the member function according to the specific device. is the implementation of the device-side in the hardware architecture of I²C, the device is generally hooked up to the CPU-controlled i²c adapter, and the data is e

20150226 IMX257 Bus device driver Model programming bus Chapter (II)2015-02-26 Li Hai alongBefore we explained a simple bus driver, the purpose is to create a file under/sys/bus/, but this is not enough, because the bus is also a device, if you want to let the system know, y

# Define addr_24cxx 0xa0Void i2c_24cxx_write (2010naddr, u8 * pdat, 2010nlen){2010i = 0;/* Enable i2c1 acknowledgement if it is already disabled by other function */// I2c_acknowledgeconfig (i2c1, enable );Pai_i2c1_regs-> cr1.bit. ACK = 1; // ack: response enabling 1: returns a response (matching address or data) after receiving a byte)/* Send i2c1 start condition */// I2c_generatestart (i2c1, enable );Export _i2c1_regs-> cr1.all | = i2c_en | i2c_start;/* Test on i2c1 ev5 and clear it */// [SB =

My philosophy: simple and practical. Don't get a bunch of source code. The result is that people don't know how to use it after reading it. view me: 1. Add I2C information to the ARCH/ARM/Mach-xxx/platform file, which is named i2c_board_info. For example: Static struct i2c_board_info _ initdata xxxi2c_board_info [] = {{I2c_board_info ("ABCD1", 0x20),/* string to match with the following, 0x20 is from the device address */. Platform_data = 0,},{I2c_bo

Recently, mainly in writing some STM32 on the development program, because the STM32 firmware library, I2C module is not good to use, so in the use of software simulation method to achieve. The specific code is as follows (debugged under Keil): #include "stm32f10x_lib.h"//Conditional Compilation 1: Use software to simulate I2C//#define PIN_SCL gpio_pin_6//#define PIN_SDA gpio_pin_7 static __inli ne void tw

The EEPROM is a storage chip for storing small amounts of data. AT24C02 is a kind of EEPROM using the I2C interface. AT24XXX EEPROM Working principle reference: http://blog.csdn.net/jklinux/article/details/74162876 Dev-interface is the interface to which the I2C controller is invoked by the application. Please refer to If you are not familiar with: http://blog.csdn.net/jklinux/article/details/78676741 Main

The 'i2c Python library 'of think bowl provides the 'hmc5883l' sensor interface to conveniently obtain sensor information. # Hmc5883lHere is the installation method Http://www.cnblogs.com/hangxin1940/archive/2013/04/04/2999015.html Http://www.cnblogs.com/hangxin1940/archive/2013/04/05/3000395.html For detailed code, please move to https://bitbucket.org/thinkbowl/i2clibraries/src/14683feb0f96/i2c_hmc5883l.py? At = Master # _ Init _ (port, ADDR =

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ZZ from http://blog.csdn.net/fudan_abc/archive/2007/06/23/1662739.aspx By the way, record this blog: the Linux USB driver development of Mingyue may be available in the future. The three important concepts of the Linux device model are bus, device, and driver. that is, bus, device, driver. In fact, the kernel also defines such data structures. They are struct bus_type, struct device, struct device_dr

On-Chip Bus Wishbone Learning (5) Bus Cycle-Overview of Reset operation Bus Cycle A bus cycle consists of multiple clock cycles that cannot be divided, completing a single read/write operation, block read/write operation, or read rewrite operation. The bus cycle is also div

Android event bus and android Bus In Android, communication between Activity, Service, and Fragment is troublesome. The main methods are as follows: (1) When broadcast is used, the sender sends a broadcast, and the receiver receives the broadcast for processing; (2) Use Handler and Message. For example, after the download thread completes the download task, it sends a Message to the UI. After the UI receive

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

Windows Azure Platform Family of articles CatalogIn the author's previous article in Windows Azure Service Bus (1) FoundationDescribes the Service Bus Support topic (TOPIC). Such as:　　When 2 clients subscribe to the same topic (TOPIC) at the same time. When a message is sent to this topic, 2 clients receive the message at the same time.　The author simulates an online chat room scene:1. Create a Windows cons

The following is a simple example:Only one host is set on the bus, and the host uses query read/writeMultiple slave machines are allowed on the bus, and the slave machine uses the hardware interruption function.*****************I started to use the interrupt function for both the host and slave, but I found that the host is vulnerable to line interference and "Twi Crashes" (using one end of the wire to grou

First, prefaceMany of you is already familiar with the Data Warehouse bus architecture and matrix given their central role in building architected data marts. The corresponding bus matrix identifies the key business processes of a organization, along with their associated Dimensi Ons. Business processes (typically corresponding to major source systems) is listed as matrix rows, while dimensions appear as Ma