Communication device and printer

A communication device comprising:

• a transmitter;
• a receiver configured to receive a confirmation signal transmitted from the transmitter, the receiver further configured to transmit an acquisition signal toward the transmitter if receiving the confirmation signal;
• a clock signal line connecting the transmitter to the receiver, the clock signal line through which a clock signal is transmitted from the transmitter toward the receiver;
• a data signal line connecting the transmitter to the receiver, the data signal line through which a data signal is transmitted from the transmitter toward the receiver;
• a memory configured to store one or more clock waveform conditions related to a waveform of the clock signal, a plurality of data waveform conditions related to a waveform of the data signal, and condition change information for changing at least one of the one or more clock waveform conditions and at least one of the plurality of data waveform conditions;
• and
• a controller configured to:
• during setting at least one of the clock signal to a clock waveform condition among the one or more clock waveform conditions, respectively and the data signal to one of the plurality of data waveform conditions,
• control the transmitter to transmit the clock signal and the confirmation signal, where at least one of the clock signal and the confirmation signal is transmitted at a reference waveform condition;
• determine whether the transmitter receives the acquisition signal transmitted from the receiver;
• if the transmitter does not receive the acquisition signal, control the transmitter to transmit the data signal and the confirmation signal using a different waveform condition for at least one of the clock signal and the confirmation signal;
• and
• if the transmitter receives the acquisition signal, update the condition change information.

A printer comprising:

• a head including a recording element;
• a transmitter;
• a driver configured to receive a confirmation signal transmitted from the transmitter, the driver further configured to transmit an acquisition signal toward the transmitter if receiving the confirmation signal, the driver further configured to drive the recording element in one of a plurality of drive modes;
• a clock signal line connecting the transmitter to the driver, the clock signal line through which a clock signal is transmitted from the transmitter toward the driver;
• a data signal line connecting the transmitter to the driver, the data signal line through which a data signal is transmitted from the transmitter toward the driver;
• a memory configured to store a plurality of clock waveform conditions related to a waveform of the clock signal, one or more data waveform conditions related to a waveform of the data signal, and condition change information for changing at least one of the plurality of clock waveform conditions and at least one of the one or more data waveform conditions;
• and
• a controller configured to:
• generate a select signal for selecting one of the plurality of drive modes based on recording data related to an image recorded on a recorded medium by the head;
• and
• control the transmitter to transmit the generated select signal as the data signal toward the driver,
• wherein the controller is further configured to:
• during setting at least one of the clock signal to one of the plurality of clock waveform conditions, respectively, and the data signal to a data waveform condition among the one or more data waveform conditions, control the transmitter to transmit the clock signal and the confirmation signal, where at least one of the clock signal and the confirmation signal is transmitted at a reference waveform condition;
• determine whether the transmitter receives the acquisition signal transmitted from the driver;
• if the transmitter does not receive the acquisition signal, control the transmitter to transmit the clock signal and the confirmation signal using a different waveform condition for at least one of the clock signal and the confirmation signal;
• and
• if the transmitter receives the acquisition signal, update the condition change information.