i2c voltmeter

This article begins by analyzing the kernel's I2C subsystem. Description: 1. The kernel version of the analysis is 2.6.37.1 2. Development Board for TQ2440, onboard ARM9 (s3c2440) 3.I2C equipment for AT24C02 4. The sequence of analysis is the registration order of the Kernel I2C subsystem (that is, the order in which this series of articles is published). It is

Linux under the I2C-driven loading process, divided into I2C equipment layer, I2C adapter layer and I2C core layer The I2C device driver layer is the drive we write for a particular I2C device, and the following is the

Open the kernel configuration entry config_i2c_chardev and load the I2c-dev module. Device node:/dev/i2c-x. User space accesses any I2C device mounted to the I2C adapter through the device node. The Read/write function of the I2c-dev module does not support block transport,

I2C subsystem framework, i2c Subsystem 1 I2C subsystem framework The Linux I2C subsystem consists of the I2C core layer, I2C bus driver, and I2C device driver. (1)

Linux using IIC Bus Read and write I2C from device registers by Handavei @ Jilin Normal University handawei@jusontech.com reproduced please be sure to indicate the source ******************* ******* 2012.7.16 1, this paper gives the implementation program of I2C from device using IIC bus under Linux. 2, this paper gives some very hidden error solutions in programming. 3, this article's reading and writing p

I2C ok6410 I2C driver analysis-user-mode driver, linuxok6410i2c3 i2c-dev 3.1 Overview Previously speaking about the I2C subsystem, I mentioned using i2c-dev.c files to implement our I2C Slave Device Driver in applications. However

Probe Method of I2C driver framework, i2c framework probe The Linux-based I2C driver adopts the probe method. The Linux driver for any device supporting I2C bus can be written according to the following framework. The I2C device connects to the cpu's specific

Original article: Documentation/I2C/upgrading-clientsTranslator: Guo shaobei2010/05/10 Update I2C drivers to the new 2.6 Driver Model========================================================== ========== Note: the I2C driver here refers to the I2C client driver, for example, RTC, USBTransceiver driver and so on. Ben doo

Through the/dev/i2c-n node, the user can directly access the I2C peripheral registers on the userspace board, mainly through i2c_rdwr this IO control command to pass i2c_msg array to kernel to execute. The following code can complete this function: #include In android/external/new I2c-util directory, the above source code into ANDROID/EXTERNAL/

This document describes how to develop an I2C interface touch screen driver mounted on the friendly mini-2440 platform. Kernel edition linux-2.6.32.2,The platform is a touch screen with the arm9-s3c2440 + I2C interface. For exampleLinux I2C driver architectureDescriptionHttp://www.lupaworld.com/273398/viewspace-204237.html To mount a new

I2C Bus (I2C-CORE.C) I2c_device_probe (struct device *dev) i2c_device_remove (struct device *dev) i2c_device_shutdown (struct device *dev) static const struct Dev_pm_ops I2c_device_pm_ops = { . Suspend = I2c_device_pm_suspend, . Resume = I2c_device_pm_resume, . Freeze = I2c_device_pm_freeze, . Thaw = I2c_device_pm_thaw, . Poweroff = I2c_device_pm_poweroff, . Restore = I2c_device_pm_restore, Set_runtime_pm_o

Is STM32 hardware I2C a pitfall ?, Stm32 hardware i2c /** **************************************** ************************************** * @ Author Maoxiao Hu * @ Version V1.0.0 * @ Date May-2015 **************************************** ************************************** * **************************************** ************************************** **/ I have been debugging the hardware

After reading the I2C official agreement document, take s3c2440 and EEPROM to verify it. Originally want to use s3c2440 SDA and SCL pin Gpio to simulate, but in the absence of an oscilloscope for a week, how can not come out, finally or give up. Even reference to Linux under the i2c-algo-bit.c and I2C-GPIO.C, Still not tuned out. If there is an oscilloscope, it m

I2C bus learning-check for missing traps-S3C2440 I2C Controller After learning the theoretical part of the IIC bus protocol, I think we should learn how to operate the 2440 IIC controller. After all, it is all about learning the S3C2440, so I will add this part. The I2C interface of S3C2440 can work in four modes: Host transmitter, host receiver, slave transmitt

I recently checked the Linux 2.6.21 kernel's I2C driver and checked the relevant information on the Internet. I am also right about the error. I have some experience. Let's record it. There may be many mistakes in it. please correct them.1. I2C Protocol1.1 Working Principle of I2C busThe I2C bus is a serial bus consist

Revision historyDate issue description authorDirectory1. Summary 32. Introduction 33. I2C architecture 34. I2C bus initialization 45. I2C Adapter Driver 56. I2C Device Driver 97. user space drive support 128. Data Transmission framework 169. References 16 1. SummaryThis article mainly introduces the

http://blog.csdn.net/cmm20071020/article/details/7179958 upgrade a I2C drive from 2.6.21 to 2.6.39 On the internet to find a post, said the drive is divided into I2C bus, I2C equipment, bus driver to do the actual bus read and write operations, device-driven implementation for different equipment operations. First look at a post to see the overall structure, an

4 bus driver 4.1 Overview The I2C bus driver is a software implementation of the I2C Adapter. It provides the ability to complete data communication between the I2C adapter and the slave device, such as the start, stop, response signal, and master_xfer implementation functions. The I2C bus driver is described by i2c_ad