Information feedback method and serial communication system

An information feedback method for a serial communication system, the serial communication system comprising a master device and at least one communication link, the master and each communication link being connected in series, each communication link comprising a plurality of slave devices connected in series, wherein each slave device comprises an input port and an output port, the method comprising:

• a) transmitting, by the master device, an instruction to acquire specific information, wherein each of the plurality of slave devices when receiving the instruction serves as a current slave device;
• b) configuring the current slave device in the communication link in a first mode to receive the instruction from the master device or a previous slave device, and forwarding the instruction to a subsequent slave device;
• c) connecting an input port and an output port of the current slave device by controlling the current slave device in a second mode that is a pass-through state to form a first pathway;
• d) determining, by the current slave device, whether the specific information is present in the current slave device to obtain a corresponding determination result;
• e) based on the determination result, selectively configuring, by the current slave device, a potential of the first pathway of the current slave device to be at a first level, such that the master device receives a feedback signal indicating whether the specific information is present in the slave device in the communication link;
• f) wherein the master device transmits the instruction to acquire the specific information and then receives the feedback signal from the slave devices;
• and
• g) wherein when a duration for the master device to receive the feedback signal from the slave devices is greater than a predetermined time threshold, the slave device is controlled to exit the second mode and operate in the first mode.

An information feedback method for a serial communication system, the serial communication system comprising a master device and at least one communication link, the master and each communication link being connected in series, each communication link comprising a plurality of slave devices connected in series, wherein each slave device comprises an input port and an output port, the method comprising:

• a) transmitting, by the master device, an instruction to acquire specific information, wherein each of the plurality of slave devices when receiving the instruction serves as a current slave device;
• b) configuring the current slave device in the communication link in a first mode to receive the instruction from the master device or a previous slave device, and forwarding the instruction to a subsequent slave device;
• c) connecting an input port and an output port of the current slave device by controlling the current slave device in a second mode that is a pass-through state to form a first pathway;
• d) determining, by the current slave device, whether the specific information is present in the current slave device to obtain a corresponding determination result;
• e) based on the determination result, selectively configuring, by the current slave device, a potential of the first pathway of the current slave device to be at a first level, such that the master device receives a feedback signal indicating whether the specific information is present in the slave device in the communication link;
• and
• f) wherein the master device comprises an input-output multiplexing port that is configured to transmit the instruction and receive the feedback signal from the slave device.