18.8.3.3.2 Workflow

Start to wait a packet from master.

dma_start_transfer_job(&i2c_dma_resource);

Once data ready, clear the address match status.

while (true) {
    if (i2c_slave_dma_read_interrupt_status(&i2c_slave_instance) &
                SERCOM_I2CS_INTFLAG_AMATCH) {
        i2c_slave_dma_write_interrupt_status(&i2c_slave_instance,
                SERCOM_I2CS_INTFLAG_AMATCH);
    }
}