code: def init(self):
          
          devid = self.ap.read32(self.address + TPIU.DEVID)
          self._has_swo_uart = (devid & TPIU.DEVID_NRZ_MASK) != 0
docs: ! @brief Reads TPIU capabilities.
          
          Currently this method simply checks whether the TPIU supports SWO in asynchronous
          UART mode. The result of this check is available via the has_swo_uart property.