Read data from I2C slave device or I2C slave device register
Simulink Support Package for Arduino Hardware / Common
Read serial data from an I2C slave. Using this block, you can also read data from a specific register on the I2C slave device.
For more information on I2C Communication, refer to I2C Read/Write.
Click View pin map to open the Arduino Pin Mapping table .
To know how to assign pins for the block, see Arduino Pin Mapping for Timer Independent Blocks.
Data— Output port to read data from the I2C slave device
Output port to read data from an I2C slave device. The size of the data that the port emits is based on the Data size (N) parameter.
Status— Status of the read operation
Output port to display error status. For more information, see Output error status.
This port appears only when you select the Output error status parameter.
I2C Module— Specific module used for I2C communication
Select the specific module on the board that you are using.
Slave address— I2C slave device address
Enter the I2C slave device address from which you want to read data. You can specify this address in hexadecimal format hex2dec(), for example, hex2dec(‘10').
Slave byte order— Byte order supported by the I2C slave device
Select the byte ordering that your I2C slave supports.
The two byte ordering options are:
Big Endian — The most significant byte is read first over the I2C bus. This option is the default option.
Little Endian — The least significant byte is read first over the I2C bus.
Enable register address— Option to enable reading from the register on I2C slave register
Select this check box to enable reading data from a specific register on the I2C slave device.
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 read operation according to your requirements.
Slave register address— I2C slave device register address to read data
Enter the slave device register address from which you want to read the data.
Specify this address as an integer or in hexadecimal format by using
hex2dec(), for example, hex2dec(‘10’).
This parameter is enabled only when you select the Enable register access parameter.
Data type— Data type to read from I2C slave device
Select the data type to read from I2C slave device.
Data size (N)— Data size to read from the I2C slave device
Enter the data size that you want to read from the I2C slave device for the selected data type.
Output error status— Option to display the error status during data transmission
Select this option to display the error status during data transmission.
When you select the Output error status 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 read
operation at the output port.
The block outputs the status as a
uint8 value. Each value
corresponds to a data transfer status.
|Status Value||Status Description|
Sample time— Frequency at which block reads data
Specify how often this block reads the data from the I2C slave. Enter a value greater than zero.