I2C 通信

使用 I2C 接口进行通信

I2C（即集成电路间接口）是一种支持双线通信的芯片到芯片接口。您可以连接到 I2C 外围设备并在其中中读取和写入数据。使用 device 函数与 aardvark 或 ni845x 对象创建接口对象。

要使用 I2C 接口，您必须安装 Total Phase^® Aardvark I2C/SPI™ Host Adapter 或者 NI™ USB-8451 or USB-8452 I2C/SPI Interface Device。

函数

`aardvarklist`	List available Total Phase Aardvark controllers (自 R2023a 起)
`aardvark`	Total Phase Aardvark Adapter connection (自 R2023a 起)
`aardvarkfind`	Find Total Phase Aardvark controllers (自 R2024a 起)
`ni845xlist`	List available NI USB-845x controllers (自 R2023a 起)
`ni845x`	NI USB-845x connection (自 R2023a 起)
`ni845xfind`	Find NI USB-845x connections (自 R2024a 起)
`scanI2CBus`	Scan for I2C peripheral devices connected to controller board (自 R2023a 起)
`device`	I2C peripheral device connection (自 R2023a 起)

`configureDigitalPin`	Set digital pin mode on controller (自 R2023a 起)
`readDigitalPin`	Read logic level value of digital pin on controller (自 R2023a 起)
`writeDigitalPin`	Write logic level value to digital pin on controller (自 R2023a 起)

`read`	Read data from I2C peripheral device (自 R2023a 起)
`write`	Write data to I2C peripheral device (自 R2023a 起)
`readRegister`	Read data from I2C peripheral device register (自 R2023a 起)
`writeRegister`	Write data to I2C peripheral device register (自 R2023a 起)

I2C Interface Overview
Connect to I2C controller boards and peripheral devices and communicate with them from MATLAB^®.
Configure I2C Controller Board Communication
Discover and connect to Total Phase Aardvark™ or NI USB-845x controller boards using the aardvark or ni845x interface.
Transmit Data to Peripheral Device Over I2C Interface
Communicate with an I2C peripheral device connected to a Total Phase Aardvark or an NI USB-845x controller board.
Install Instrument Control Toolbox Support Package for Total Phase Aardvark I2C/SPI Interface
Install the support package for a Total Phase Aardvark controller to communicate with I2C and SPI interfaces in MATLAB.
Install Instrument Control Toolbox Support Package for National Instruments NI-845x I2C/SPI Interface
Install the support package for an NI USB-845x controller to communicate with I2C and SPI interfaces in MATLAB.
Transition Your Code to aardvark or ni845x Interface
Create I2C connections using the device function with an aardvark or ni845x object instead of i2c.

Troubleshoot the I2C interface.

Restore a BlinkM RGB LED to its factory settings by communicating with it over the I2C bus using a Total Phase Aardvark controller board.

Write and read data from an Analog Devices® ADXL345 I2C enabled accelerometer chip using the NI™ USB-8452 controller.

Communicate with a TMP102 temperature sensor on NI USB-8542.