CN116224877A - Remote terminal for bus adaptation, bus adaptation system and method - Google Patents

Abstract

The invention discloses a remote terminal for bus self-adaptation, a bus self-adaptation system and a method. The remote terminal includes a main processor, a protocol conversion chip, a master-slave transformer, a master-slave single-pole multi-throw relay and an OC gate chip; the main processor is connected to the protocol conversion chip and the OC gate chip respectively, and the protocol conversion chip is connected to the main single-pole multi-throw relay through the main transformer. The throwing relay is connected to the slave SPMT relay through the slave transformer; both the master SPMT relay and the slave SPMT relay are connected to multiple buses; the OC gate chip is respectively connected to the master SPMT relay and the slave SPMT relay. The present invention only uses one logic and hardware resources, uses a single-pole multi-throw relay to switch multiple buses, realizes the self-adaptation of the same remote device under different working conditions through software processing, and reduces the use of components and PL logic resources. It is beneficial to reduce the power consumption and weight of the equipment, effectively improve the utilization rate of resources, and save costs.

Description

Remote terminal for bus adaptation, bus adaptation system and method

technical field

The invention relates to the technical field of electronic equipment, in particular to a remote terminal for bus self-adaptation, a bus self-adaptation system and method.

Background technique

CAN, SPI and 1553B buses are commonly used communication interfaces in the field of aerospace and space application technology. They have the characteristics of bidirectional output, real-time and multi-device support. The use of bus technology can simplify software and hardware design, simplify system structure, and facilitate system expansion. and updates.

However, at present, the remote devices in the above-mentioned bus system are only suitable for communication with the same upper-level device under the same protocol, and cannot meet the needs of communicating with different upper-level devices under multiple working conditions.

Contents of the invention

The technical problem to be solved by the present invention is to provide a remote terminal for bus self-adaptation, a bus self-adaptation system and method for the problems existing in the prior art.

In order to solve the above technical problems, the present invention provides a remote terminal for bus self-adaptation, including: a main processor, a protocol conversion chip, a main transformer, a main single-pole multi-throw relay, a slave transformer, a slave single-pole multi-throw relay and an OC gate chip.

The main processor is connected to the protocol conversion chip and the OC gate chip respectively. The protocol conversion chip is connected to the main SPMT relay through the main transformer, and the slave SPMT relay is connected to the slave transformer; the main SPMT relay and the slave SPMT relay are connected to the Multiple bus connections; the OC gate chip is respectively connected to the master SPMT relay and the slave SPMT relay.

The main processor communicates with the currently connected bus through the protocol conversion chip, master/slave transformer and master/slave single-pole multi-throw relay. The OC gate chip controls the master/slave SPMT relay to switch connections with multiple buses.

The beneficial effects of the present invention are: the present invention constitutes the hot backup relationship of the internal path of the equipment through the master-slave transformer and the master-slave single-pole multi-throw relay, ensuring the stable operation of the remote equipment; and the main processor converts the chip, master/slave transformer through the protocol Communicate with the master/slave SPMT relay with the currently connected bus. When the bus switching command is received or the communication is abnormal, the control protocol conversion chip performs bus protocol conversion, and controls the switching of the SPMT relay and multiple relays through the OC gate chip. The connection of the bus; that is, the present invention only uses one logic and hardware resources, uses a single-pole multi-throw relay to switch multiple buses, realizes self-adaptation of the same remote device under different working conditions through software processing, and reduces components and PL The use of logic resources helps reduce power consumption and weight of equipment, effectively improves resource utilization, and saves costs.

On the basis of the above technical solutions, the present invention can also be improved as follows.

Further, after the remote terminal is powered on, the main processor controls the protocol conversion chip to initialize to the default bus protocol, and communicates with the upper-level device corresponding to the default bus protocol through the master/slave single-pole multi-throw relay.

Further, when the main processor receives the bus switching instruction, the control protocol conversion chip converts the bus protocol into the bus protocol corresponding to the bus switching instruction, and controls the master/slave single-pole multi-throw relay to switch the connected bus through the OC gate chip, and then Communicate with the upper-level device corresponding to the current bus protocol.

The beneficial effect of adopting the above-mentioned further solution is: the main processor controls the protocol conversion chip to perform protocol conversion according to the switching command, and controls the connection position of the single-pole multi-throw relay and multiple buses through the OC gate chip, thereby realizing bus switching according to the control command; only Using one channel of logic and hardware resources, the self-adaptation of the same remote device under different working conditions is realized through software processing, which reduces the use of components and PL logic resources, reduces device power consumption and weight, improves resource utilization, and saves cost.

Further, when the main processor does not receive the test data of the current bus protocol within the preset time, it will automatically control the protocol conversion chip to perform bus protocol conversion, and control the master/slave single-pole multi-throw relay to switch the connected bus through the OC gate chip , until communication is established normally.

The beneficial effect of adopting the above-mentioned further scheme is: when the communication abnormality is detected, the bus switch is automatically performed, which can improve the reliability, and no matter how the switch is performed, the interface state of the current hardware can be returned to, and normal communication can be established to prevent the bus from failing after the state is abnormal. Communicate with higher-level equipment.

Further, the test data of the current bus protocol is the long loop test command sent by the upper-level device connected through the current bus.

The beneficial effect of adopting the above further solution is that the communication status of both ends can be effectively confirmed through the long loop test command.

Further, the main processor adopts a SOC system-on-a-chip, or a combination of ARM and FPGA.

The beneficial effect of adopting the above further solution is that the present invention is applicable to various embedded systems.

Further, the remote terminal for bus adaptation includes RT equipment for 1553B bus adaptation system, slave equipment for CAN bus adaptation system and slave equipment for SPI adaptive system.

The beneficial effect of adopting the above further solution is that the above-mentioned remote terminal for bus self-adaptation can be used in various bus self-adaptive systems, and has a wide range of applications.

In order to solve the above technical problem, the present invention also provides a bus adaptive system, including the remote terminal for bus adaptation provided by the above technical solution, and also includes multiple upper-level devices communicating with the remote terminal through multiple buses.

On the basis of the above technical solutions, the present invention can also be improved as follows.

Further, the bus adaptive system includes 1553B bus adaptive system, CAN bus adaptive system and SPI adaptive system.

In order to solve the above-mentioned technical problems, the present invention also provides a bus self-adaptive method, which is realized by using the bus self-adaptive system provided by the above-mentioned technical solution, including the following steps: the main processor converts the chip through the protocol, the master/slave transformer and the master/slave The single-pole multi-throw relay communicates with the currently connected bus. When the bus switching command is received or the communication is abnormal, the control protocol conversion chip performs bus protocol conversion, and controls the master/slave single-pole multi-throw relay switching and multiple buses through the OC gate chip. Connection.

Additional aspects of the invention and advantages thereof will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Description of drawings

FIG. 1 is a structural block diagram of a remote terminal for bus adaptation provided by an embodiment of the present invention;

Fig. 2 is a structural block diagram of the RT device of the 1553B bus adaptive system provided by the embodiment of the present invention.

Detailed ways

Embodiments of the present disclosure are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present disclosure from the contents disclosed in this specification. Apparently, the described embodiments are only some of the embodiments of the present disclosure, not all of them. The present disclosure can also be implemented or applied through different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present disclosure. It should be noted that, in the case of no conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in the present disclosure, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present disclosure.

It is noted that the following describes various aspects of the embodiments that are within the scope of the appended claims. It should be apparent that the aspects described herein may be embodied in a wide variety of forms and that any specific structure and/or function described herein is illustrative only. Based on the present disclosure one skilled in the art should appreciate that an aspect described herein may be implemented independently of any other aspects and that two or more of these aspects may be combined in various ways. For example, any number of the aspects set forth herein can be used to implement an apparatus and/or practice a method. In addition, such an apparatus may be implemented and/or such a method practiced using other structure and/or functionality than one or more of the aspects set forth herein.

FIG. 1 is a remote terminal for bus adaptation provided by an embodiment of the present invention. As shown in Figure 1, the remote terminal includes: a main processor, a protocol conversion chip, a main transformer, a main single-pole multi-throw relay, a slave transformer, a slave single-pole multi-throw relay and an OC gate chip.

The main processor is respectively connected with the protocol conversion chip and the OC gate chip. The embodiment of the present invention uses ZYNQSOC as the main processor, and other types of SOCs can also be used, or the ARM+FPGA solution can be used. The PL (Programmable Logic) part of the SOC realizes the 1553B protocol layer by encapsulating IP, and the PS (Processing System) part realizes the sending and receiving and processing of application layer data. In the embodiment of the present invention, the 1553B protocol layer is implemented using PL, and a 1553B protocol chip, such as BU-61580, can also be used.

The protocol conversion chip is connected to the main single-pole multi-throw relay through the main transformer, and connected to the slave single-pole multi-throw relay through the slave transformer, and is used to realize the conversion of various bus protocols. For example, when the remote terminal used for bus adaptation is the RT device of the 1553B bus adaptation system, the protocol conversion chip can use the 1553B special chip Hi-1573CDM, so as to realize the 1553B protocol conversion. When the remote terminal for bus self-adaptation is the slave device of the CAN bus self-adaptive system, the protocol conversion chip can use the chip PCA82C250T; when the remote terminal for bus self-adaptation is the slave device of the SPI self-adaptive system, the protocol conversion chip can be integrated in the main processor.

In the embodiment of the present invention, the main transformer and the slave transformer are used to ensure bus isolation, and the transformer B3226 can be used.

Both the master single-pole multi-throw relay and the slave single-pole multi-throw relay are connected to multiple buses, and are used to realize connection with different buses according to the control of the OC gate chip. It should be noted that the path formed by the master transformer and the master SPMT relay is the master path, the path formed by the slave transformer and the slave SPMT relay is the slave path, and the master path and the slave path form a hot standby relationship.

The OC gate chip is respectively connected to the main SPMT relay and the slave SPMT relay, and is used to control the main SPMT relay (when the main channel is connected to the bus) to switch the connection with multiple buses according to the instructions of the main processor, or to switch the connection with multiple buses according to the instructions of the main processor. The instruction control of the device switches the connection with multiple buses from the single-pole multi-throw relay (when the bus is connected from the path).

The main processor communicates with the currently connected bus through the protocol conversion chip, master/slave transformer and master/slave single-pole multi-throw relay. The OC gate chip controls the master/slave SPMT relay to switch connections with multiple buses.

In the existing bus system, remote devices can only be connected to one bus. That is, the remote device is only suitable for communicating with one upper-level device under the same protocol, and cannot meet the needs of communicating with different upper-level devices under multiple working conditions. When it is necessary to connect different bus upper-level devices under different working conditions, the usual practice is to design multiple remote devices, and different remote devices are connected to different bus upper-level devices. However, designing multiple remote devices requires multiple copies of corresponding hardware, logic, and software resources, which consumes more resources.

In the embodiment of the present invention, the master-slave transformer and the master-slave single-pole multi-throw relay form the hot standby relationship of the internal path of the device to ensure the stable operation of the remote device. When the main path formed by the main transformer and the main single-pole multi-throw relay is normal, it is connected to the external bus through the main path; when the main path is abnormal, the slave path formed by the slave transformer and the secondary single-pole multi-throw relay is connected to the external bus.

And the main processor communicates with the currently connected bus through the protocol conversion chip, master/slave transformer and master/slave single-pole multi-throw relay. The single-pole multi-throw relay is controlled by the OC gate chip to switch the connection with multiple buses.

The embodiment of the present invention only uses one logic and hardware resources, uses a single-pole multi-throw relay to switch multiple buses, and realizes automatic switching of multiple bus protocol interfaces on the basis of a set of hardware interfaces through software control, that is, through software processing Realize self-adaptation of the same remote device under different working conditions, reduce the use of components and PL logic resources, help reduce device power consumption and weight, effectively improve resource utilization, and save costs.

In the embodiment of the present invention, after the remote terminal is powered on, the main processor controls the protocol conversion chip to initialize to the default bus protocol, and communicates with the upper-level device corresponding to the default bus protocol through the master/slave single-pole multi-throw relay. If the single-pole multi-throw switch is connected to n buses, where n is a positive integer greater than or equal to 2, the n buses can be respectively named as the first bus, the second bus...the nth bus. One of the buses may be defaulted as the default bus, and in the embodiment of the present invention, the first bus is determined as the default bus. That is, the initial position of the SPMT relay of the remote terminal is to connect to the first bus. After the remote terminal is powered on, the software is initialized to the first bus protocol, and communicates with the first upper-level device connected to the first bus. The first upper-level device can acquire status information of the remote terminal, and judge whether the communication status of the remote terminal is normal.

Optionally, in one embodiment, when the main processor receives the bus switching instruction, the control protocol conversion chip converts the bus protocol into the bus protocol corresponding to the bus switching instruction, and controls the master/slave SPMT through the OC gate chip The relay switches the connected bus, and then communicates with the higher-level device corresponding to the current bus protocol. If the main channel is normal, after the main processor receives the command to switch to the second bus through the first bus, it will control the main single-pole multi-throw relay to switch to the second bus through the OC gate chip, and at the same time re-initialize the bus interface, set The bus protocol is the second bus protocol, and starts to communicate with the second upper-level device connected to the second bus. By analogy, when the remote terminal receives the command to switch the j-th bus through the i-th bus, i=1, 2...n, j=1, 2...n; wherein, the main SPMT is controlled by the OC gate chip The relay switches to the jth bus, and at the same time re-initializes the bus interface, sets the bus protocol to the jth bus protocol, and starts to communicate with the jth superior device connected to the jth bus.

Optionally, in one embodiment, when the main processor does not receive the test data of the current bus protocol within the preset time, it automatically controls the protocol conversion chip to perform bus protocol conversion, and controls the master/slave single pole through the OC gate chip The multi-throw relay switches the connected bus until communication is normally established.

Specifically, the upper-level device of the bus will send a long loop test command to the remote terminal every first preset time interval (such as 1s), and the remote terminal will reply a long loop feedback command after receiving the long loop test command. If the remote terminal does not receive the long loop command sent by the superior device for the second consecutive preset time (such as 10s), it will automatically switch to another bus to try; if it has not received the second consecutive preset time after switching to other buses Data of any corresponding bus protocol will be automatically switched to another bus to try; loop in turn until the communication is established normally.

In the embodiment of the present invention, bus switching is automatically performed when abnormal communication is detected, which can improve reliability. Regardless of switching, it can return to the interface state consistent with the current hardware and establish normal communication to prevent failure to communicate with the upper-level equipment after the state is abnormal. communication.

Taking the RT equipment of the 1553B bus adaptive system as an example, the present invention will be introduced in detail below. As shown in Figure 2, the RT device has multiple 1553B interfaces externally, and the hardware interfaces are respectively connected to the 1553B buses corresponding to BC1, BC2...BCn, referred to as the first bus, the second bus...the nth bus. An RT device can include n different usage phases. In the first stage, the RT device communicates with BC1 of the first bus; in the second stage, the RT device communicates with BC2 of the second bus, ... In the nth stage, the RT device communicates with BCn of the nth bus. It should be noted that the BC device is the bus controller in the 1553B bus adaptive system.

Inside the RT device, ZYNQ series SOC is used as the main processor, and the 1553B dedicated chip Hi-1573CDM is connected externally to realize 1553B protocol conversion, and the transformer B3226 is used to ensure bus isolation. Each 1553B bus includes two channels, A and B, and the A and B channels are hot standby. The PL part of the SOC implements the 1553B protocol layer by encapsulating IP, and the PS part realizes the sending, receiving and processing of application layer data.

In the embodiment of the present invention, the internal resource of the RT device is only one channel, that is, the SOC pin, the 1553B chip, and the transformer are all one channel. In the downstream stage of the transformer, a single-pole multi-throw relay is used to switch to multiple 1553B buses. The switching of the relay is realized by the main processor SOC controlling the OC gate chip.

The application layer protocols used by different buses are different, and the subaddresses used are also different. RT devices can identify different buses by receiving data subaddresses and application layer protocols.

The initial relay position of the RT device is connected to the first bus. After the RT device is powered on, the software initializes to the first bus protocol and communicates with BC1. BC1 can obtain the status information of the RT device and judge whether the communication status of the RT device is normal.

When the RT device receives the command to switch to the second bus through the first bus, it controls the SPMT relay to switch to the second bus through the OC, and at the same time re-initializes the 1553B interface, sets it to the second bus protocol, and starts communicating with BC2.

When RT receives the command to switch to the third bus through the second bus, it controls the single-pole multi-throw relay to switch to the third bus through the OC, and at the same time re-initializes the 1553B interface, sets it to the third bus protocol, and starts communicating with BC3.

By analogy, when the RT receives the command to switch the bus j through the i-th bus, where i=1, 2...n, j=1, 2...n; that is, the single-pole multi-throw relay is switched to the j-th bus through the OC control At the same time, re-initialize the 1553B interface, set it as the jth bus protocol, and start communicating with BCj.

The upper-level device BCi (i=1, 2...n) sends a long loop test command to the RT device every 1s, and the RT device replies with a long loop feedback command after receiving the long loop test command. If the RT device does not receive the long loop command sent by BCi for 10 consecutive seconds, it will automatically switch to the jth bus (j=1, 2...n) to try; if it does not receive any j bus protocol data, it will automatically switch to the j+1th bus to try; cycle in turn until the communication is established normally.

An embodiment of the present invention also provides a bus adaptive system, including the remote terminal for bus adaptive provided in the above embodiments, and also includes a plurality of upper-level devices communicating with the remote terminal through multiple buses. The bus adaptive system can be 1553B bus adaptive system, CAN bus adaptive system and SPI adaptive system.

For example, as shown in Figure 2, the 1553B bus adaptive system includes RT equipment and multiple BC equipment. The RT device includes a main processor, a protocol conversion chip, a main transformer, a main SPMT relay, a slave transformer, a slave SPMT relay and an OC gate chip.

The main processor is connected to the protocol conversion chip and the OC gate chip respectively. The protocol conversion chip is connected to the main SPMT relay through the main transformer, and the slave SPMT relay is connected to the slave transformer; the main SPMT relay and the slave SPMT relay are connected to the Multiple bus connections; the OC gate chip is respectively connected to the main SPMT relay and the slave SPMT relay, and is used to control the main SPMT relay to switch the connection with multiple buses according to the instructions of the main processor, or according to the instructions of the main processor Instructions control switching from SPMT relays to multiple bus connections.

The main processor communicates with the currently connected bus through the protocol conversion chip, master/slave transformer and master/slave single-pole multi-throw relay. The OC gate chip controls the master/slave SPMT relay to switch connections with multiple buses. The embodiment of the present invention only uses one logic and hardware resources, uses a single-pole multi-throw relay to switch multiple buses, realizes self-adaptation of the same remote device under different working conditions through software processing, and reduces the cost of components and PL logic resources. The use is beneficial to reduce the power consumption and weight of the equipment, effectively improve the utilization rate of resources, and save costs.

The embodiment of the present invention also provides a bus self-adaptation method, which is realized by the bus self-adaptation system of the above-mentioned embodiment, including the following steps: the main processor communicates with the protocol conversion chip, the master/slave transformer and the master/slave single-pole multi-throw relay The currently connected bus communicates. When the bus switching command is received or the communication is abnormal, the control protocol conversion chip performs bus protocol conversion, and controls the master/slave single-pole multi-throw relay to switch connections with multiple buses through the OC gate chip.

The main processor is also used to switch to the slave path formed by the slave transformer and the slave SPMT relay when detecting an abnormality in the master path formed by the master transformer and the master SPMT relay, and connect to the external bus through the slave path.

In the several embodiments provided in this application, it should be understood that the disclosed devices and methods may be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or integrated. to another system, or some features may be ignored, or not implemented.

A unit described as a separate component may or may not be physically separated, and a component displayed as a unit may or may not be a physical unit, that is, it may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment of the present invention.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.

If the integrated unit is realized in the form of a software function unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention is essentially or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of software products, and the computer software products are stored in a storage medium In, several instructions are included to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods in various embodiments of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, RandomAccessMemory), magnetic disk or optical disk and other media that can store program codes.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection of the present invention. within range.

Claims (10)

1. A remote terminal for bus self-adaptation is characterized in that, comprising: main processor, protocol conversion chip, main transformer, main single-pole multi-throw relay, from transformer, from single-pole multi-throw relay and OC gate chip; The main processor is connected with the protocol conversion chip and the OC gate chip respectively, the protocol conversion chip is connected with the main SPMT relay through the main transformer, and the slave SPMT relay is connected with the slave transformer; the main SPMT relay and the slave The single-pole multi-throw relays are all connected to multiple buses; the OC gate chip is respectively connected to the main single-pole multi-throw relay and the slave single-pole multi-throw relay, and is used to control the switching of the main single-pole multi-throw relay and the multiple bus lines according to the instructions of the main processor. The connection of the bus, or according to the instruction of the main processor, the connection between the single-pole multi-throw relay and multiple buses is controlled; The main processor communicates with the currently connected bus through the protocol conversion chip, the master/slave transformer and the master/slave single-pole multi-throw relay. conversion, and through the OC gate chip to control the master/slave single-pole multi-throw relay to switch connections with multiple buses. 2. The remote terminal for bus adaptation according to claim 1, characterized in that, after the remote terminal is powered on, the main processor controls the protocol conversion chip to initialize to the default bus protocol, and through the main / from the SPMT relay to communicate with the upper-level device corresponding to the default bus protocol. 3. The remote terminal for bus adaptation according to claim 1, wherein, when the main processor receives the bus switching instruction, it controls the protocol conversion chip to convert the bus protocol into the bus switching instruction The corresponding bus protocol, and through the OC gate chip to control the master/slave single-pole multi-throw relay to switch the connected bus, and then communicate with the upper-level device corresponding to the current bus protocol. 4. the remote terminal for bus adaptation according to claim 1, is characterized in that, when described main processor does not receive the test data of current bus protocol within preset time, then automatically controls described protocol conversion The chip converts the bus protocol, and controls the master/slave single-pole multi-throw relay to switch the connected bus through the OC gate chip until the communication is established normally. 5 . The remote terminal for bus adaptation according to claim 4 , wherein the test data of the current bus protocol is a long loop test command sent by a superior device connected to the current bus. 6 . 6. The remote terminal for bus adaptation according to any one of claims 1 to 5, characterized in that, the main processor adopts a SOC system-on-chip, or a combination of ARM and FPGA. 7. according to the remote terminal for bus adaptive described in any one of claim 1 to 5, it is characterized in that, described remote terminal for bus adaptive comprises the RT equipment for 1553B bus adaptive system, with A slave device for CAN bus adaptive systems and a slave device for SPI adaptive systems. 8. A bus adaptive system, characterized in that it comprises the remote terminal for bus adaptive described in any one of claims 1 to 7, and also includes a plurality of superiors communicating with the remote terminal through multiple buses equipment. 9. The bus adaptive system according to claim 8, comprising a 1553B bus adaptive system, a CAN bus adaptive system and an SPI adaptive system. 10. A bus adaptive method, is characterized in that, utilizes the bus adaptive system described in claim 8 to realize, comprises the steps: The main processor communicates with the currently connected bus through the protocol conversion chip, master/slave transformer and master/slave single-pole multi-throw relay, and controls the protocol conversion chip to perform bus protocol conversion when receiving a bus switching command or communication abnormality. And control the master/slave single-pole multi-throw relay to switch connections with multiple buses through the OC gate chip.

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