docs: def switch_mode(self, new_mode):
          """ Explicitly switch the Bus Pirate mode
  
          :param new_mode: The mode to switch to. Use the buspirate.MODE_* constants
          """
          packet = bytearray()
          packet.append(new_mode)
          self.device.write(packet)
          possible_responses = {
              self.MODE_I2C: b'I2C1',
              self.MODE_RAW: b'BBIO1',
              self.MODE_SPI: b'API1',
              self.MODE_UART: b'ART1',
              self.MODE_ONEWIRE: b'1W01'
          }
          expected = possible_responses[new_mode]
          response = self.device.read(4)
          if response != expected:
              raise Exception('Could not switch mode')
          self.mode = new_mode
          self.set_peripheral()
          if self.i2c_speed:
              self._set_i2c_speed(self.i2c_speed)