Multiplexing circuit and cash register payment system

Abstract

The application is suitable for the technical field of cash register payment system, and provides a multiplexing circuit and a cash register payment system, which comprises a first communication interface, a second communication interface, a third communication interface, a first USB switching circuit, a second USB switching circuit, a third USB switching circuit, a charging control circuit, a fifth USB switching circuit, a hub and a communication control circuit; the connection relationship among the first communication interface, the second communication interface, the third communication interface, the first USB switching circuit, the second USB switching circuit, the third USB switching circuit and the fifth USB switching circuit is set, and the channel is switched, so that the communication among the devices connected by the multiple communication interfaces is realized. Thus, the technical problem that the single cash register device cannot realize communication in the same application scene in the prior art is solved.

Description

Technical Field

[0001] This application belongs to the field of cash register equipment technology, and in particular relates to a multiplexed circuit and a cash register payment system. Background Technology

[0002] In existing technologies, there are multiple ways to pay at a cashier, such as desktop POS or mobile POS; you can choose to pay by scanning a code or by swiping a card; you can choose to use a cash drawer or a separate display screen for scanning a code.

[0003] In the existing implementations described above, multiple payment methods may exist in the same application scenario. However, payment information needs to be entered separately for each device, or payment information needs to be entered separately. For example, POS machines and cash drawers cannot share information. Therefore, it is also difficult to share payment information for other devices in the same scenario, such as desktop or tablet displays. This results in cashiers having to obtain payment information from the current payment device when performing checkout operations. When there are problems with the human-computer interaction interface, or when the cashier leaves the current payment device for other reasons while waiting for the checkout to be completed, it is impossible to obtain the user's payment information in a timely manner. Summary of the Invention

[0004] This application provides a multiplexed circuit and a cashier payment system, which can solve the technical problem that individual cashier devices cannot communicate with each other in the same application scenario in the prior art.

[0005] In a first aspect, embodiments of this application provide a multiplexing circuit for communication and charging / discharging between multiple different devices, characterized in that the multiplexing circuit includes: The first communication interface is connected to the first external device; The second communication interface connects to the second external device; The third communication interface connects to a third external device. A first USB switching circuit is connected to the first communication interface; The second USB switching circuit is connected to the second communication interface; The third USB switching circuit is connected to both the first USB switching circuit and the third USB switching circuit. The OTG circuit is connected to the third USB switching circuit. The charging control circuit is connected to the first communication interface, the second communication interface, the third USB switching circuit and the fourth USB switching circuit respectively, and outputs charging and discharging control signals according to the communication and charging and discharging status of the first communication interface and the second communication interface to control the third USB switching circuit to switch the power supply path. The fifth USB switching circuit is connected to the host device and the third USB switching circuit via USB OTG. The hub is connected to the fifth USB switching circuit, the first USB switching circuit, the second USB switching circuit, and the third communication interface, respectively. The communication control circuit is connected to the fifth USB switching circuit, the first USB switching circuit, the second USB switching circuit, and the hub, respectively, and outputs master-slave control signals to control the fifth USB switching circuit, the first USB switching circuit, and the second USB switching circuit to switch the power supply path and the communication path, and outputs an enable signal to control the hub to work.

[0006] In one possible implementation of the first aspect, the first communication interface and the second communication interface are USB type-C interfaces.

[0007] In one possible implementation of the first aspect, the third communication interface is a pogo pin interface or a USBhost interface.

[0008] In one possible implementation of the first aspect, the charging control circuit is a charging control chip equipped with the PD protocol.

[0009] In one possible implementation of the first aspect, the first USB switching circuit, the second USB switching circuit, the third USB switching circuit, and the fifth USB switching circuit are all USB SWITCH.

[0010] Secondly, embodiments of this application provide a cashier payment system, which includes the multiplexing circuit described above.

[0011] In one possible implementation of the second aspect, the cashier payment system includes an expansion circuit connected to the first communication interface; or, The expansion circuit is connected to the second communication interface.

[0012] In one possible implementation of the second aspect, the cashier payment system includes a power adapter connected to either the first communication interface or the second communication interface.

[0013] In one possible implementation of the second aspect, the cashier payment system includes an external host connected to either the first communication interface or the second communication interface.

[0014] In one possible implementation of the second aspect, the cashier payment system includes a tablet device connected to the third communication interface.

[0015] The beneficial effects of the embodiments in this application compared with the prior art are: The above solution allows for direct connection between the first, second, and third communication interfaces, the first USB switching circuit, the second USB switching circuit, the third USB switching circuit, and the fifth USB switching circuit. By controlling the switching of power and communication paths through the charging and communication control circuits, communication can be achieved between peripherals connected to the first, second, and third communication interfaces and the main device connected to the original multiplexing circuit. Therefore, this solution addresses the technical problem in existing technologies where individual POS devices in the same application scenario cannot communicate. Furthermore, the first or second communication interface can be used to connect a power source to charge the main device and other external devices connected to the communication interfaces. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of a multiplexing circuit provided in one embodiment of this application; Figure 2 This is a circuit diagram of the fifth USB switching circuit in a multiplexing circuit provided in an embodiment of this application; Figure 3 This is a circuit diagram of the OTG circuit in a multiplexing circuit provided in an embodiment of this application; Figure 4 This is a circuit diagram of a hub in a multiplexing circuit provided in an embodiment of this application; Detailed Implementation In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of this application. However, those skilled in the art will understand that this application may also be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods have been omitted so as not to obscure the description of this application with unnecessary detail.

[0018] It should be understood that, when used in this application specification and the appended claims, the term "comprising" indicates the presence of the described features, integrals, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or a collection thereof.

[0019] It should also be understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0020] As used in this application specification and the appended claims, the term "if" may be interpreted, depending on the context, as "when," "once," "in response to determination," or "in response to detection." Similarly, the phrase "if determined" or "if detected [the described condition or event]" may be interpreted, depending on the context, as meaning "once determined," "in response to determination," "once detected [the described condition or event]," or "in response to detection [the described condition or event]."

[0021] Furthermore, in the description of this application and the appended claims, the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0022] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0023] This invention addresses the technical problem in existing technologies where multiplexed circuits cannot achieve communication between individual POS devices in the same application scenario. This invention proposes a multiplexed circuit and a POS payment system.

[0024] In one embodiment, Figure 1A schematic diagram of the multiplexing circuit provided in this application is shown. The multiplexing circuit is used for communication and charging / discharging between multiple different devices. The multiplexing circuit includes a first communication interface 10, a second communication interface 20, a third communication interface 30, a first USB switching circuit 40, a second USB switching circuit 50, a third USB switching circuit 70, an OTG circuit 90, a charging control circuit 60, a fifth USB switching circuit 100, a hub 80, and a communication control circuit 110. The first communication interface 10 is connected to a first external device, the second communication interface 20 is connected to a second external device, and the third communication interface 30 is connected to a third external device. The first USB switching circuit 40 is connected to the first communication interface 10; the second USB switching circuit 50 is connected to the second communication interface 20; the third USB switching circuit 70 is connected to both the first USB switching circuit 40 and the second USB switching circuit 50; and the charging control circuit 60 is connected to the first communication interface 10, the second communication interface 20, and the third USB switching circuit 70. The fifth USB switching circuit 100 is connected to the host device and the third USB switching circuit 70 via USB OTG; the hub 80 is connected to the fifth USB switching circuit 100, the first USB switching circuit 40, the second USB switching circuit 50 and the third communication interface 30; the communication control circuit 110 is connected to the fifth USB switching circuit 100, the first USB switching circuit 40, the second USB switching circuit 50 and the hub 80; and the OTG circuit 90 is connected to the fifth USB switching circuit 100 and the third USB switching circuit 70.

[0025] The first communication interface 10 performs data exchange and charging / power supply; the second communication interface 20 performs data exchange and charging / power supply; the third communication interface 30 performs data exchange and charging / power supply; the charging control circuit 60 outputs charging / discharging control signals according to the communication and charging / discharging status of the first communication interface 10 and the second communication interface 20 to control the third USB switching circuit 70 to switch the power supply path; the communication control circuit 110 outputs master-slave control signals to control the fifth USB switching circuit 100, the first USB switching circuit 40, and the second USB switching circuit 50 to switch the power supply path and communication path, and outputs an enable signal to control the hub to work.

[0026] The above solution allows for direct connection between the first communication interface 10, the second communication interface 20, the third communication interface 30, the first USB switching circuit 40, the second USB switching circuit 50, the third USB switching circuit 70, and the fifth USB switching circuit 100. The charging control circuit 60 and the communication control circuit 110 control the switching of power and communication paths, thereby enabling communication between different external devices connected to the first communication interface 10, the second communication interface 20, and the third communication interface 30 and the main device originally connected to the multiplexing circuit. Therefore, this solution solves the technical problem in the prior art where individual POS devices in the same application scenario cannot communicate. Furthermore, the first communication interface 10 or the second communication interface 20 can be connected to a power source to charge the main device and other devices connected to the communication interfaces. Additionally, the devices connected to each communication interface can be selected according to actual needs, enabling the expansion of various POS functions.

[0027] In addition, by controlling the circuit connection relationship, the USB switching circuit (third USB switching circuit 70) that switches the power supply path and the USB switching circuit (first USB switching circuit 40, second USB switching circuit 50, and fifth USB switching circuit 100) that switches the communication path can be controlled in a unified manner without the need to control each individual switching circuit, thus avoiding confusion and mutual interference of multiple control signals.

[0028] The following describes the operation of the multiplexing circuit when the first communication interface 10, the second communication interface 20, and the third communication interface 30 are connected to different devices: 1. When the first external device connected to the first communication interface 10 is a power supply, the second external device connected to the second communication interface 20 is an external PC, and the third external device connected to the third communication interface 30 is a tablet, the charging control circuit 60 outputs a charging and discharging control signal to control the third USB switching circuit 70 to conduct the power supply path between the first USB switching circuit 40 and the OTG circuit 90, and simultaneously conducts the path between the second USB switching circuit 50 and the OTG circuit 90 through the charging and discharging control signal, thereby realizing the charging of the tablet connected to the second communication interface 20 and the charging of the main device. At this time, the main device can be upgraded through the external PC.

[0029] 2. When the first external device connected to the first communication interface 10 is an external PC, the second external device connected to the second communication interface 20 is a power supply, and the third external device connected to the third communication interface 30 is a tablet, the charging control circuit 60 outputs a charging and discharging control signal to control the third USB switching circuit 70 to conduct the power supply path between the first USB switching circuit 40 and the OTG circuit 90, and simultaneously conducts the path between the second USB switching circuit 50 and the OTG circuit 90 through the charging and discharging control signal, thereby realizing the charging of the first communication interface 10 and the main device. At this time, the main device can be upgraded through an external PC.

[0030] 3. When the first external device connected to the first communication interface 10 is the USB interface of a tablet, the second external device connected to the second communication interface 20 is an external PC, and the third external device connected to the third communication interface 30 is the magnetic interface of the same tablet, the charging control circuit 60 outputs a charging and discharging control signal to control the third USB switching circuit 70 to conduct the power supply path between the first USB switching circuit 40 and the OTG circuit 90, and simultaneously conducts the path between the second USB switching circuit 50 and the OTG circuit 90 through the charging and discharging control signal, thereby realizing the charging of the tablet connected to the first communication interface 10 by the main device. At this time, the main device can be upgraded through the external PC.

[0031] 4. When the first external device connected to the second communication interface 20 is a tablet's USB port, the second external device connected to the first communication interface 10 is an external PC, and the third external device connected to the third communication interface 30 is the same tablet's magnetic interface, the charging control circuit 60 outputs a charging / discharging control signal to control the third USB switching circuit 70 to connect the power supply path between the first USB switching circuit 40 and the OTG circuit 90. Simultaneously, the charging / discharging control signal also connects the path between the second USB switching circuit 50 and the OTG circuit 90, thereby enabling the main device to charge the tablet connected to the second communication interface 20. In this case, the main device can be upgraded via an external PC. It should be noted that if the external PC is connected to other peripheral hosts or expansion circuits at this time, signal exchange can also be performed.

[0032] 5. When the first external device connected to the first communication interface 10 is a power supply, and the second external device connected to the second communication interface 20 is another host device, the charging control circuit 60 outputs a charging / discharging control signal to control the third USB switching circuit 70 to connect the power supply path between the first USB switching circuit 40 and the OTG circuit 90. Simultaneously, the charging / discharging control signal also connects the path between the second USB switching circuit 50 and the OTG circuit 90, thereby enabling the power supply to charge the other host device connected to the second communication interface 20. It should be noted that the other host device in this case can be an expansion circuit. It should also be noted that when the devices connected to the first communication interface 10 and the second communication interface 20 are swapped, the operating principle remains the same as described above.

[0033] 6. When the first external device connected to the first communication interface 10 via the expansion circuit is a power supply, and the second external device connected to the second communication interface 20 is another host device, the charging control circuit 60 outputs a charging / discharging control signal to control the third USB switching circuit 70 to connect the power supply path between the first USB switching circuit 40 and the OTG circuit 90. Simultaneously, the charging / discharging control signal also connects the path between the second USB switching circuit 50 and the OTG circuit 90, thereby enabling the power supply to charge the other host devices connected to the second communication interface 20. It should be noted that when the devices connected to the first communication interface 10 and the second communication interface 20 are swapped, the operating principle remains the same as described above.

[0034] In all the above embodiments, the master device also outputs master-slave control signals and enable signals. The master-slave control signals control the switching of the first USB switching circuit 40 (USB Switch1), the second USB switching circuit 50 (USB Switch2), and the fifth USB switching circuit 100 (USB Switch0). The enable signals control the hub 80 to work, thereby enabling charging and communication with the first communication interface 10, the second communication interface 20, and the third communication interface 30.

[0035] In one possible implementation of the first aspect, the first communication interface 10 and the second communication interface 20 are USB type-C interfaces.

[0036] The USB Type-C interface can be used for master-slave expansion and external device expansion, providing an implementation plan for communication and power supply between more POS devices.

[0037] In one possible implementation of the first aspect, the third communication interface 30 is a pogo pin interface or a USB host interface.

[0038] The pogo pin interface enables communication and power supply with the tablet.

[0039] In one possible implementation of the first aspect, the charging control circuit 60 is a charging control chip equipped with the PD protocol.

[0040] The charging control chip can be of the FL7102 type.

[0041] In one possible implementation of the first aspect, the first USB switching circuit 40, the second USB switching circuit 50, the third USB switching circuit 70, and the fifth USB switching circuit 100 are all USB switches. For specific connection relationships, please refer to... Figure 2 As shown, Figure 2 The connection relationships of the fifth USB switching circuit 100 are specifically disclosed. Host-Device-SEL is connected to the master-slave control signal output terminal of the master device, AP-USB-DM and AP-USB-DP are connected to the signal output terminal of the master device, USB-OTG-DM and USB-OTG-DP are connected to the OTG circuit 90, and USB-HUB-DM and USB-HUB-DP are connected to the hub 80. Other switching circuits are implemented with reference to the above circuit, and the specific connection relationships are varied accordingly, and will not be repeated here. Optionally, the USB SWITCH signal can be BCT4227ETB-TR-USB.

[0042] In one possible implementation of the first aspect, the OTG circuit 90 can be referred to Figure 3 For implementation, hub 80 can be referenced. Figure 4 accomplish.

[0043] Corresponding to the multiplexing circuit in the above embodiments, this application also provides a cashier payment system, which includes the multiplexing circuit described above.

[0044] It should be noted that, since the cashier payment system of the present invention includes all embodiments of the above-mentioned multiplexing circuit, the cashier payment system of the present invention has all the beneficial effects of the above-mentioned multiplexing circuit, which will not be repeated here.

[0045] In one possible implementation of the second aspect, the cashier payment system includes an expansion circuit connected to the first communication interface 10; or, The expansion circuit is connected to the second communication interface 20.

[0046] The expansion circuit can be an adapter circuit composed of multiple interconnected USB ports.

[0047] Through the above expansion, communication can be achieved between all devices connected to the expansion circuit and the devices connected to the first communication interface 10, the second communication interface 20, and the third communication interface 30. If the expansion circuit is connected to a power supply device, it can also supply power to other interfaces through the communication interfaces connected to the expansion circuit.

[0048] In one possible implementation of the second aspect, the cashier payment system includes a power adapter connected to either the first communication interface 10 or the second communication interface 20.

[0049] In one possible implementation of the second aspect, the cashier payment system includes an external host connected to either the first communication interface 10 or the second communication interface 20.

[0050] In one possible implementation of the second aspect, the cashier payment system includes a tablet device connected to the third communication interface 30.

[0051] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A multiplexing circuit, characterized in that, The multiplexing circuit includes: The first communication interface is connected to the first external device; The second communication interface connects to the second external device; The third communication interface connects to a third external device; A first USB switching circuit is connected to the first communication interface; The second USB switching circuit is connected to the second communication interface; The third USB switching circuit is connected to both the first USB switching circuit and the second USB switching circuit. The OTG circuit is connected to the third USB switching circuit. The charging control circuit is connected to the first communication interface, the second communication interface and the third USB switching circuit respectively, and outputs charging and discharging control signals according to the communication and charging and discharging status of the first communication interface and the second communication interface, so as to control the third USB switching circuit to switch the power supply path. The fifth USB switching circuit is connected to the host device and the third USB switching circuit via USB OTG. The hub is connected to the fifth USB switching circuit, the first USB switching circuit, the second USB switching circuit, and the third communication interface, respectively. The communication control circuit is connected to the fifth USB switching circuit, the first USB switching circuit, the second USB switching circuit, and the hub, respectively, and outputs master-slave control signals to control the fifth USB switching circuit, the first USB switching circuit, and the second USB switching circuit to switch the power supply path and the communication path, and outputs an enable signal to control the hub to work.

2. The multiplexing circuit as described in claim 1, characterized in that, The first communication interface and the second communication interface are USB type-C interfaces.

3. The multiplexing circuit as described in claim 1, characterized in that, The third communication interface is either a pogo pin interface or a USB host interface.

4. The multiplexing circuit as described in claim 1, characterized in that, The charging control circuit is a charging control chip equipped with the PD protocol.

5. The multiplexing circuit as described in claim 1, characterized in that, The first USB switching circuit, the second USB switching circuit, the third USB switching circuit, and the fifth USB switching circuit are all USB SWITCH.

6. A cashier payment system, characterized in that, The cashier payment system includes the multiplexed circuit as described in any one of claims 1-5.

7. The cashier payment system as described in claim 6, characterized in that, The payment system includes an expansion circuit, which is connected to the first communication interface; or... The expansion circuit is connected to the second communication interface.

8. The cashier payment system as described in claim 6, characterized in that, The cashier payment system includes a power adapter, which is connected to either the first communication interface or the second communication interface.

9. The cashier payment system as described in claim 6, characterized in that, The cashier payment system includes an external host, which is connected to either the first communication interface or the second communication interface.

10. The cashier payment system as described in claim 6, characterized in that, The cashier payment system includes a tablet device, which is connected to the third communication interface.

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