Workflow

Configure and enable module.

configure_i2c_slave();

1.1.

Create and initialize configuration structure.

struct i2c_slave_config config_i2c_slave;
i2c_slave_get_config_defaults(&config_i2c_slave);

1.2.

Change address and address mode settings in the configuration.

config_i2c_slave.address        = SLAVE_ADDRESS;
config_i2c_slave.address_mode   = I2C_SLAVE_ADDRESS_MODE_MASK;
config_i2c_slave.buffer_timeout = 1000;

1.3.

Initialize the module with the set configurations.

i2c_slave_init(&i2c_slave_instance, CONF_I2C_SLAVE_MODULE, &config_i2c_slave);

1.4.
Enable the module.
```
i2c_slave_enable(&i2c_slave_instance);
```

2.
Create variable to hold transfer direction.
```
enum i2c_slave_direction dir;
```

Create packet variable to transfer.

struct i2c_slave_packet packet = {
    .data_length = DATA_LENGTH,
    .data        = write_buffer,
};