iic i2c

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

if it does not, therefore, we only need to use the interfaces provided by the I2C subsystem in linux to build our device drivers. In this way, our device drivers do not depend on a specific CPU and are more portable.IIC drivers are mainly divided into Master and Slave, Master is the host controller, IIC controller like A10 is a Master, Slave is the IIC Slave dev

the message structure in the last lesson, it also needs to be divided into 2 messages, one is to write the message, then the construction of the read message. if (At24->chip.flags at24_flag_addr16) msgbuf[i++] = offset >> 8; msgbuf[i++] = offset; MSG[0].ADDR = client->addr; Msg[0].buf = Msgbuf; Msg[0].len = i; MSG[1].ADDR = client->addr; Msg[1].flags = I2C_M_RD; Msg[1].buf = buf; Msg[1].len = count; 2. Driver porting We are now going to modify and migrate the

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

performance and low power consumption. It is also one of the most embedded development boards available on the market. The chip has a 16 KB instruction and data cache, and a storage management unit (MMU) LCD controller, three serial ports, four DMA channels, four clock timers, eight 10-bit A/D conversion; supports I2C, I2S, SPI, Master/Slave USB, and SD/MMC cards. The I2C bus of the S3C2410 microprocessor

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

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 give

IIC Protocol InterpretationRecommended resources: Http://m.elecfans.com/article/574049.html and 51921129 (dynamic diagram)(1) OverviewI²c (inter-integrated Circuit bus) integrated circuit bus, which is designed by NXP (formerly Philips), is used for master controller and slave-to-device communication, in small data volume occasions, transmission distance is short, at any time can only have one host and other features.Often

Wince + 6410 IIC driver problems I recently debugged the 6410 IIC driver and asked the upper layer to write data to the EEPROM for permanent storage. Since the camera driver in the BSP package contains an example of IIC operation, naturally, you just need to refer to the gourd-based painting in the camera driver, // Initialize iic1Hi2c = createfile (_ T ("iic0:")

(I2C source Download Https://github.com/groeck/i2c-tools) I2ctool for Android December 1, 2014 11:36 The ANDROID.MK code is as follows Local_path:= $ (call My-dir)Include $ (clear_vars)Local_module_tags: = OptionalLocal_c_includes + = $ (local_path) $ (Local_path)/$ (kernel_dir)/includeLocal_src_files: = TOOLS/I2CBUSSES.C tools/util.cLocal_module: = I2c