DLN adapters support only 7-bit addressing. To assign a I2C slave address to your device, use the DlnI2cSlaveSetAddress() function. This function does not prevent you from assigning reserved addresses to your DLN adapter. For more information about reserved addresses, read Reserved I2C Slave Addresses.
Some DLN adapters can support more than one I2C slave addresses simultaneously. To check how many I2C slave addresses are supported by your DLN adapter, use the DlnI2cSlaveGetAddressCount() function. To assign several I2C slave addresses to your DLN adapter, use the DlnI2cSlaveSetAddress() function for every address. In the function, you specify the slaveAddressNumber parameter; its value should be unique for every I2C slave address but should not exceed the number of supported slave addresses.
To check an I2C slave address assigned to your device, call the DlnI2cSlaveGetAddress() function and point the desired value of the slaveAddressNumber parameter. To check all assigned I2C slave addresses, call the DlnI2cSlaveGetAddress() function for every possible slaveAddressNumber value.
I2C bus allows to transmit data to all I2C slaves simultaneously. This option is called General Call. To make a general call, the I2C master generates the following address: 0000 000 followed by the Write (0) direction bit. The General Call address is one of the reserved addresses and cannot be assigned to any I2C slave device.
When an I2C slave receives the general call address, it can acknowledge it to receive transmitted data or ignore it.
You can configure the I2C slave’s behavior when it receives the general call address:
If you want your DLN I2C slave port to acknowledge the general call addressing, call the DlnI2cSlaveGeneralCallEnable() function.
If you want your DLN I2C slave port to ignore the general call addressing, call the DlnI2cSlaveGeneralCallDisable() function.
To check the current configuration of the general call support, use the DlnI2cSlaveGeneralCallIsEnabled() function.