I2C Controller Write

The input port write data to the I2C peripheral device or I2C peripheral device register.

Output port to display error status. For more information, see Output error status.

Dependencies

This port appears only when you select the Output error status parameter.

Select the specific board that you are using. Changing the board updates the pin choices that you get. To open the pin map of the Raspberry Pi^® board, click the View pin map.

Specify the I2C module on the Raspberry Pi hardware to communicate with the I2C peripheral. For more information on the Raspberry Pi pin mapping and modules that hardware boards support, click View pin map.

To enable the secondary I2C bus on your Raspberry Pi hardware, follow the steps as mentioned in Enable Secondary I2C Bus of Raspberry Pi Hardware.

Enter the I2C peripheral device address to which you want to write the data. The I2C peripheral device address is a 7-bit address.

Specify this address as an integer or in hexadecimal format by using hex2dec(), for example hex2dec(‘61’).

Select the byte ordering that your I2C peripheral supports.

The two byte ordering options are:

Select this check box to write data to a specific I2C peripheral register.

When you clear this parameter, the Send NACK at the end of data transfer and Remove stop bit at the end of data transfer parameters are displayed. Using these parameters, you can modify the write operation according to your requirements. For more information, I2C Register Read/Write

Enter the peripheral device register address to which you want to write the data.

Dependencies

This parameter is enabled only when you select the Enable register access parameter.

When you select this parameter, the I2C Controller Write block sends a NACK (Not Acknowledge) bit to the peripheral device with the final byte.

When the peripheral device receives the NACK, it waits for a STOP condition from the I2C Controller Write block. The controller block generates either a STOP condition to abort the transfer or a repeated START condition to start a new transfer.

When you clear this parameter, the block sends a STOP condition. This condition indicates that the block has terminated the data transmission and the I2C bus is free for any other I2C controller block to initiate the read/write operation.

When you select this parameter, the block sends another START condition followed by an address and read/write bit. The block sends any number of start conditions recursively. Such a repeated START condition allows write operations to the peripheral devices without releasing the bus. No other controller block interrupts the operation.

Select this option to display the output error status. When you select this parameter, the block configures an output port. The port on the block is labeled as Status, indicating that the block outputs the status of the write operation at the output port.

The block outputs the status as a uint8 value. Each value corresponds to a data transfer status.