iic i2c

This part is prepared for analysis and summarization in several partsBecause I2C communication must have at least two chips, the driver consists of two parts: I2C driver of the main chip I2C driver from the chip Note: What if none of the options are supported ??? (Unfortunately, only two chips can be driven, but the process is similar) (1).

2 I2C Subsystem 2.1 LINUXI2C Subsystem Architecture The I2C subsystem is already available in the kernel, so you must familiarize yourself with the subsystem before you can do the I2C drive. 2.2 Three major components 1, I2C core (I2c-core) The

I recently encountered some problems when debugging I2C. I hope you can help me with similar problems. Keywords: I2C sub-steady state low speed signal dejitter [Prelude]In the system, the I2C slave function must be implemented in the CPLD to communicate with the I2C interface of the CPU, so as to expand the gpio port

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

My philosophy: Simple and practical can be, do not engage in a pile of source code out, the results show people do not know how to use, Look at me: 1, in arch/arm/mach-xxx/own platform file to add I2C information, beauty its name Yue: i2c_board_info For example: static struct I2c_board_info __initdata xxxi2c_board_info[] = {{I2c_board_info ("Abcd1", 0x20),/* string to match the back, 0x20 from the device address * *. Platform_data = 0,},{I2c_board_in

1. InstallationI2C drive load and rate changes check the blog "Raspberry School notes--I2C device load and rate settings". 2.I2C Bus ScanThe I2cdetect-l command allows you to view the I2C bus on the raspberry pie, and from the results of the return, the raspberry pie contains two I2C buses, and by reading the relevant

The premise is that the driver of the I2C controller must have been running normally, the standard I2C tool can only read and write to 8-bit address, but the EEPROM of this 16-bit address will be powerless So this kind of 16-bit address for read and write support, in the embedded domain is still very common The main use of standard Linux I2C interface, struct i2c

Reproduced in front of a lot of articles on I2C, to finish a project, but also to write their own points I2C experience, I this is a pure application angle, want to see the principle, to see reprinted articles, people write a lot better. For a I2C device, the device file is the simplest and most complex, saying it's simple because it's very easy to provide code u

This article is not original, mainly because it has recently solved an I2C problem. During this period, I read a lot of rich blog posts and now I will sort out this sub-system. Eric Xiao described the entire I2C framework in detail and helped me a lot. I would like to express my gratitude here. It seems to be Chengdu too .... ++ Here we will record it in a slightly "vulgar" language to facilitate your memo

i2c--2.6.34 Document: How to enumerate the generated i2c_client ============================================Author: yuanluluHttp://blog.csdn.net/yuanluluCopyright No, but reprint please retain this paragraph statement============================================ According to their own understanding, the http://lxr.linux.no/linux+v2.6.34/Documentation/i2c/instantiating-devices is translated into the do

The s5pc100's Proteus microprocessor supports multi-host I2C bus serial interfaces. A dedicated serial data cable (SDA) and a serial clock line (SCL) transmit information between the bus host and peripheral devices connected to the I2C bus. The SDA and SCL lines are bidirectional. In multi-host I2C bus mode, multiple microprocessors are sent to or received from t