i2c wiki

About I2C, this is also the previously tangled part. Note. (For details, refer to: source; Phodal'sBlog) The I2C (Inter-Integrated Circuit) bus is a two-line serial bus developed by PHILIPS to connect the microcontroller and its peripheral devices. It is a bus standard widely used in the field of microelectronics communication control. > The I2C bus supports any

that I could. But the expansion of G is really a little slow. It takes about 10g a minute. But fortunately, I finally finished it, and made a sweat. In the afternoon, I checked the setting of Interrupt registers on 8607. Use three interrupt registers, 0x [3-5], and each bit uses a mask to set an interrupt. Every one is 8 bits. There are also 24 interruptions. This is read and write using I2C. I was a bit confused when I was writing registers. When I

# Modify the configuration file Raspberry Pi has integrated the I2C driver and only needs to be started. Modify configuration file Sudo nano/etc/modprobe. d/raspi-blacklist.conf ! [Configure] (http://images.cnblogs.com/cnblogs_com/hangxin1940/466697/o_rasp_i2c1.png "comment the third line ")Comment out the third line, CTRL + x save Next, start the I2C module. Sudo nano/etc/modules ! [Configure] (ht

According to their own understanding, the http://lxr.linux.no/linux+v2.6.34/Documentation/i2c/instantiating-devices is translated into the document about enumerating and establishing i2c_client. Have objections or questions please refer to the original, after all, the core of the document is the true essence. Method 1: Use the bus number to declare the device. defines the device's information in the initialization of the kernel. The prerequisite is

In fact, I have never used a 10-bit address or a universal broadcast address. the general broadcast address should be used for communications between multiple MCU using I2C. although it is useless, it is still translated and may be used in the future: 10bit address: the number of addresses that can be extended by 10bit addressing. devices with 7bit and 10bit addresses can connect to the same I2C bus, and bo

The I2C driver test has a problem. for details, refer to Linux general technology-Linux programming and kernel information. Why ~~~~~~~~~ My board is TQ2440. The I2C test is OK during streaking. After running the system and testing I2C, the following prompt appears: S3c2440-i2c s3c2440-

The RTC module of hi3515 seems to have a bug, which is not recommended in the Document. Therefore, only one ds1339 can be expanded to serve as a real-time clock. However, the Linux source code provided by hith has not been changed for the drivers of I2C and ds1339, I changed it in make menuconfig. The/dev directory does not respond. It can only be used in the bus_for_each_dev function. I found that the ds1339 driver is mounted to the

I2C communication interview (1) In the current SoC system, many controllers are gradually integrated into the MCU. Only some simple peripherals communicate with the MCU, using the I2C protocol is the choice of many peripherals and MCU communication protocols. Generally, TP, batteryic sensor, and other devices in embedded devices use I2C communication protocols. T

Before learning I2C Drive, think about it should be a profound understanding of the I2C agreement. Personally feel that the best way to understand the I2C protocol is to practice, and the best practice is to use GPIO to simulate the I2C protocol test, intuitive and profound.First look at the

1. Overview I2C is a two-wire interface that I2C only two bidirectional lines, one serial Data line (SDA), and the other serial Clock (SCL). SCL: The data is entered into each EEPROM device by the ascent, and the output data is dropped along the drive EEPROM device. (Edge Trigger) SDA: Two-way door, with any number of other OD and OC gate into "line and" relationship. 2. Output level The SDA and SCL PIN ci

The wiki's API format://language abbreviation. wikipedia.org/w/api.php?action=querytitles= language corresponding to the text format= return format prop= Revisionsrvprop=contentI'm now doing a Chinese history today get XML data (prop for version specific parameters click on the Chinese API and document view)The requested URL is: Http://zh.wikipedia.org/w/api.php?action=querytitles=12 month 31st format=xmlprop=revisions rvprop=content$str = file_get_contents ($need _url);//$content = $result->que

AbstractFm31256 is a multi-functional storage chip based on I2C bus and powered by the iron and electronics technology. In addition to non-volatile memory, the device also provides real-time clock, low-voltage reset, watchdog counters, non-volatile event counters, lockable serial digital identification, and other features. This article mainly introduces the basic functions and principles of fm31256, and gives the specific application methods of fm3125

Example 1 1, kernel \ arch \ Arm \ Mach-PXA \ board-test.c added /* I2C */Static struct i2c_gpio_platform_data i2c_bus_data = {. Sda_pin = viper_rtc_i2c_sda_gpio,. Scl_pin = viper_rtc_i2c_scl_gpio,. Udelay = 10,. Timeout = 100,}; Static struct platform_device i2c_bus_device = {. Name = "i2c-gpio ",. ID = 1,/* pxa2xx-i2c is bus 0, so start at 1 */. Dev = {. Platf

I2C devices in the system can be found in the/sys/bus/I2C/devices directory, as follows: View plaincopy to clipboardprint?# Ls0-00340-00300-00110-0058# Ls0-00340-00300-00110-0058 These devices exist in the system. How did these devices come from? In your machine configuration, you will execute the "i2c_register_board_info" function, which will register an i2c_board_info struct into the system, The i2c_board

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