I2C Express VI
LabVIEW 2015 myRIO Toolkit Help
Edition Date: June 2015
Part Number: 373925C-01
»View Product Info
Edition Date: June 2015
Part Number: 373925C-01
»View Product Info
 | Download Help (Windows Only) |
Requires: myRIO Toolkit or roboRIO Toolkit
Writes data to or reads data from an Inter-Integrated Circuit (I2C) slave device through the I2C channels on the myRIO or the roboRIO.
The roboRIO uses a 3.3 V voltage rail on the I2C port for powering I2C peripherals and provides 3.3 V DIO lines for generating I2C signals.
| Dialog Box Options |
| Block Diagram Inputs |
| Block Diagram Outputs |
Dialog Box Options
| Parameter | Description |
|---|---|
| Node name | Specifies the name of this Express VI. You can also double-click the name of this Express VI on the expandable node to edit the name. |
| Channel | Specifies the I2C channel to which to write data to or read data from the I2C slave device. |
| Connections | Shows the myRIO or the roboRIO pins that correspond to the data line (SDA) and clock line (SCL). |
| Mode | Specifies the mode of operation that this Express VI uses to communicate with the I2C slave device. Mode contains the following options:
|
| Speed | Specifies the transfer rate of the I2C channel. The default is Standard mode (100 kbps). |
| View Code | Displays the underlying code of this Express VI. |
| Connection Diagram | Shows the I/O connector pinouts on the myRIO or the roboRIO. The highlighted pinouts represent the channels that you configure. |
Block Diagram Inputs
| Parameter | Description |
|---|---|
| Slave Address (7-bit) | Specifies the address of the I2C slave device which this Express VI reads data from or writes data to. You must specify the address in 7 bits. Some I2C devices might have an 8-bit address in which the first 7 bits represent the address and the last bit represents the mode of operation. For this kind of I2C devices, you must specify Slave Address (7-bit) using the seven most significant bits. |
| Bytes to Write | Specifies the data bytes to write to the I2C slave device. This input is available when you set Mode to Write or Write/Read. |
| Byte Count | Specifies the number of bytes to write to the I2C slave device. This input is available when you set Mode to Read or Write/Read. |
| error in (no error) | Describes error conditions that occur before this node runs. |
Block Diagram Outputs
| Parameter | Description |
|---|---|
| Bytes Read | Returns the data bytes that this Express VI reads from the I2C slave device. This output is available when you set Mode to Read or Write/Read. |
| error out | Contains error information. This output provides standard error out functionality. |
I2C Details
Related Information
I/O Connectors (myRIO Toolkit)
I/O Connectors (roboRIO Toolkit)
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