CN110533848B - Method and system for intercepting parallel cash register printing data and tracing additional information - Google Patents
Method and system for intercepting parallel cash register printing data and tracing additional information Download PDFInfo
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- CN110533848B CN110533848B CN201910727279.6A CN201910727279A CN110533848B CN 110533848 B CN110533848 B CN 110533848B CN 201910727279 A CN201910727279 A CN 201910727279A CN 110533848 B CN110533848 B CN 110533848B
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07G—REGISTERING THE RECEIPT OF CASH, VALUABLES, OR TOKENS
- G07G1/00—Cash registers
- G07G1/0018—Constructional details, e.g. of drawer, printing means, input means
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07G—REGISTERING THE RECEIPT OF CASH, VALUABLES, OR TOKENS
- G07G1/00—Cash registers
- G07G1/12—Cash registers electronically operated
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Abstract
The invention relates to a method for intercepting printing data of a parallel cash register and tracing additional information and a cash register printing system adopting the parallel cash register. The method comprises the steps that a bridge circuit based on FPGA is arranged between a cash register and a printer, the bridge circuit intercepts original printing data sent by the cash register to the printer and forwards the original printing data to the printer, matching of key fields of insertion positions is carried out in the intercepting and forwarding processes, the cash register is controlled to stop sending the original printing data when the matching is successful, corresponding additional printing data are sent to the printer, and the cash register is controlled to recover sending of the original printing data to the printer after the sending is finished. The system can be used for implementing the method of the invention and comprises a cash register and a printer, wherein an FPGA-based bridge circuit is arranged between the cash register and the printer. The method and the device can improve the accuracy of the additional information printing position on the receipt and improve the working efficiency of the equipment.
Description
Technical Field
The invention relates to a method for intercepting printing data of a parallel cash register and registering additional information, and also relates to a cash register printing system adopting the parallel cash register for implementing the method.
Background
The basic architecture of the existing merchant cash register system is that a cash register (e.g. POS machine) is directly connected to a printer and a display device through a cable, the cash register collects and determines transaction information during a transaction, generates printing data (or called original printing data) of a bill (e.g. a consumption receipt) or an invoice, and sends the printing data to the printer for paper printing, or simultaneously displays the bill information on a client display for a client to view.
However, at present, the merchant often wants to display the corresponding two-dimensional code and marketing information (for example, member information or promotion information) of the merchant on the receipt, and such additional two-dimensional code and marketing information are not generated by the cash register, and need to be inserted or supplemented into the original print data by some means to form print data for actual printing (or display, etc.).
According to the prior art, to realize the function of displaying the additional information at the same time, the equipment required to be equipped is complex, the data processing capacity is large, the resource occupation is large, and inconvenience is brought to the user.
One feasible idea for solving the problem of additional printing under the condition of avoiding adding complex equipment and processing a large amount of data is to arrange a bridge system between the cash register and the printer, intercept the printing data of the cash register through the bridge system, add additional information and control the printer to print out a receipt containing the additional information.
The existing bridging technology is mostly based on the design scheme of a single chip microcomputer, data are transmitted and received through the single chip microcomputer, the single chip microcomputer receives the analyzed USB data through a PHY chip, and the data are processed and forwarded to a printer.
However, in the context of a parallel port printer, in order to print the additional printing information at a set position of the receipt, the cash register is required to be able to suspend sending data to the parallel port printer at any position during sending of the consumption bill, wait for transmission and printing of the additional printing information, and continue sending of other printing data by the cash register after the parallel port printer receives and completes printing of the additional printing information. Because the single chip microcomputer is of a sequential execution structure, the intercepted data is processed in batches, when additional information is inserted, a long time is needed for matching the key field data of the inserted position, and the cash register can not be accurately controlled in time to pause sending of printing data, so that the position of the additional information on the actually printed receipt is not accurate, even the additional information can not be printed, and the customer experience is seriously influenced. Meanwhile, because the parallel port device has bidirectional data transmission, and the single chip microcomputer has obvious weakness in the aspect of bidirectional data quick interaction, unless a special IP core aiming at the parallel port protocol is arranged on the single chip microcomputer, a great problem is encountered in the aspect of realizing bidirectional communication.
In addition, at present, a mode of acquiring the shop consumption condition by a plurality of merchants is still a mode of manually reporting the shops, so that the data reporting is inaccurate and delayed, and the shop consumption condition needs to be manually input by a plurality of personnel in a market, so that the work is complicated and tedious, and the cost is high.
Disclosure of Invention
In order to solve the technical problems, the invention provides a method for intercepting the printing data of the parallel cash register and tracing the additional information, and also provides a cash register printing system adopting the parallel cash register for implementing the method, so as to improve the accuracy of the printing position of the additional information on the receipt and improve the working efficiency of the equipment.
The technical scheme of the invention is as follows: a method for intercepting the print data of parallel cash register and copying additional information includes setting bridge circuit based on FPGA between cash register and printer, setting up parallel port communication connection between input end of bridge circuit and cash register and parallel port communication connection between output end of bridge circuit and printer, intercepting original print data sent from cash register to printer by bridge circuit and forwarding it to printer, carrying out matching of key field of insertion position according to additional print configuration for intercepted original print data, sending signal of suspending sending print data to cash register by analog printer when matching is successful, stopping sending original print data by cash register, sending corresponding additional print data to printer by bridge circuit, sending signal of resuming sending print data to cash register by analog printer after additional print data is sent, resuming sending original print data to printer by cash register, the bridge circuit resumes interception and forwarding of the original print data.
The bridge circuit can send the intercepted original printing data to a computer platform, and the computer platform carries out statistics and analysis on relevant data, such as daily sales volume, sales volume and the like of each shop or each commodity, and can carry out various statistical analyses to form monthly, quarterly and annual statistics tables, trend analysis graphs and the like.
The FPGA preferably takes an ARM as an upper computer, receives additional printing configuration and additional printing data from the ARM, transmits the intercepted original printing data to the ARM, and sends the intercepted original printing data to the computer platform through the ARM.
The supplemental print data typically includes the merchant's associated two-dimensional code data.
The cash register printing system adopting the parallel port cash register can be used for implementing any method for intercepting the print data of the parallel port cash register and tracing the additional information, which comprises the cash register and the printer, wherein an FPGA-based bridge circuit is arranged between the cash register and the printer, the input end of the bridge circuit is in parallel port communication connection with the cash register, the output end of the bridge circuit is in parallel port communication connection with the printer, the bridge circuit intercepts and forwards the original print data sent by the cash register to the printer, in the process of intercepting and forwarding, the intercepted original print data is matched with the key field of the insertion position according to the additional print configuration, when the matching is successful, the printer is simulated to send a signal for suspending sending the print data to the cash register, the cash register stops sending the original print data, and the bridge circuit sends the corresponding additional print data to the printer, after the additional printing data is sent, the analog printer sends a signal for recovering sending of the printing data to the cash register, the cash register recovers sending of the original printing data to the printer, and the bridge circuit recovers interception and forwarding of the original printing data.
The system can also be provided with a computer platform, wherein the bridge circuit is connected with the computer platform and used for sending the intercepted original printing data to the computer platform, and the computer platform is used for carrying out relevant data statistics and analysis.
The interface used for parallel port communication is a 25-pin D-shaped interface, and DB25 data lines are adopted for connection between the cash register and the bridge circuit and between the bridge circuit and the printer.
For other non-standard interfaces (non-25-pin D-shaped interfaces, such as an interface with 36 pins), a switching circuit (converter) can be used to convert the interface into a 25-pin D-shaped interface (standard interface).
The bridge circuit preferably comprises an FPGA and an ARM, the FPGA uses the ARM as an upper computer, receives additional printing configuration and additional printing data from the ARM, and transmits the intercepted original printing data to the ARM, the input end of the FPGA forms the input end of the bridge circuit, and the output end of the FPGA forms the output end of the bridge circuit.
The ARM can be provided with a network communication interface and/or a network communication module, is accessed to a computer communication network in a wired and/or wireless communication mode, and sends the intercepted original printing data to a computer platform through the computer communication network.
The FPGA may include:
the data acquisition module is used for acquiring original printing data sent by the cash register and sending the acquired original printing data to the upper computer;
the additional printing system comprises an additional printing judging module, an additional printing control module and an abnormality diagnosis module, wherein the additional printing judging module is used for judging whether additional printing of additional information is required to be carried out or not, identifying an additional printing data inserting position in original printing data according to an additional printing configuration, and generating and sending an additional printing mark signal to the additional printing control module and the abnormality diagnosis module when the additional printing data inserting position is identified;
and a tracking control module: the system comprises a register, a register judging module, a printer, a cash register and a cash register, wherein the register is used for controlling and coordinating the printing of original printing data and additional printing data, when a tracing mark signal of a tracing judging module is received, the cash register is controlled to pause the sending of the original printing data, the additional printing data sent by an upper computer is sent to the printer, and after the sending is finished, the cash register is controlled to resume the sending of the original printing data;
a MUX module: the method is used for selecting to output the additional printing data or the original printing data and connecting the corresponding output channel.
The invention has the beneficial effects that: because the bridge system formed by combining the FPGA and the ARM is adopted for carrying out cash register data interception and chasing, the execution speed is high, the realization is flexible, the accuracy of the printing position of the additional information is improved, and the negative influence of the confusion of the position of the additional information on a client is avoided; due to the adoption of parallel operation, the consumption receipt data (original printing data) can be acquired and simultaneously uploaded to the upper computer for other operations, the data can be sent to a computer system (merchant platform) of a merchant through the upper computer, automatic collection and statistics are carried out through the computer system, the sales condition of each merchant does not need to be manually collected, and the timeliness, the accuracy and the working efficiency of the data are improved; due to the fact that the MUX is adopted to conduct output switching between the original printing data and the additional printing data, interference or confusion among different data is avoided, and the quality of the printed receipt is further guaranteed.
Drawings
FIG. 1 is a schematic diagram of a system configuration to which the present invention relates;
fig. 2 is a schematic diagram of a bridge circuit configuration and flow diagram according to the present invention.
Detailed Description
Referring to fig. 1, the cash register printing system of the present invention combines an FPGA (Field-Programmable Gate Array, or Field-Programmable Gate Array) and an ARM (ARM processor) to form a bridge circuit, and connects the bridge circuit between the cash register and the printer, where the input and output of the FPGA are parallel ports, and usually a 25-pin D-shaped interface (DB 25) is adopted, and is respectively connected to corresponding parallel ports of the cash register and the printer (see fig. 2) through respective DB25 data lines, so as to receive print data of the cash register, and transmit the print data added with additional information after bridge processing to the printer. The FPGA is in communication connection with the ARM, an internal bus for communication between the FPGA and the ARM can be set to realize the communication connection, the FPGA receives the additional information of the additional printing configuration and the additional information needing the additional printing from the ARM, the matching of the front field of the additional printing insertion position is carried out according to the additional printing configuration of the ARM, a signal for suspending sending of printing data is sent to the cash register when the matching is successful, the additional printing data sent by the ARM is requested or waited to be sent, the additional printing data sent by the ARM is sent to the printer, the printer is controlled to print the additional information at the corresponding position, after an end signal of the current additional printing of the ARM is received, information for continuously sending the printing data is sent to the cash register so as to be sent to the printer, the printer is controlled to continuously print according to the printing data of the cash register, and finally, a complete receipt containing the additional information is printed.
The print data (including the print data of the additional information) can be sent to the display by the FPGA according to the corresponding protocol for displaying, and also can be sent to an e-mail or a WeChat of a client by an electronic bill file. According to the setting, the paper receipt, the display, the electronic bill and the like can be adopted at the same time, and one or more types can also be adopted.
The system has 2 working modes, namely an interception mode and a pursuit mode.
An interception mode: in practice, all signals at the cash register end can be connected to the corresponding signal position at the printer end by using a real line in the FPGA, or can be transmitted after being received.
A pursuing mode: and in places where additional information such as two-dimensional codes and the like needs to be chased, the FPGA informs the cash register to suspend data transmission at the moment through some parallel port signal states, under the control of the ARM, printing data of the additional information is transmitted to the FPGA, the FPGA transmits the additional information to the printer, and after the chasing is finished, the printer enters an interception mode again.
The FPGA is connected between the cash register and the consumption receipt printer, the cash register sends original printing data (consumption or transaction data) according to a parallel port protocol, the FPGA sends the printing data sent by the cash register to the printer while receiving the printing data, and when additional information such as two-dimensional codes and characters needs to be chased, the FPGA sends the printing data of the additional information such as the two-dimensional codes and the characters to the printer.
The internal architecture and flow of the FPGA to implement the above functions can be seen in fig. 2.
The main functional modules of the FPGA comprise: the system comprises a data acquisition module, a tracing judgment module, a tracing control module, an FIFO storage module, an upper computer communication module, an abnormality diagnosis module and a MUX module. Wherein:
a data interception module: the data acquisition module is used for acquiring the original printing data sent by the cash register, acquiring the data of a parallel port (generally DB 25) connected with the cash register, temporarily storing the acquired data in an internal FIFO (FIFO memory) of the module, and sending all the data in the internal FIFO to an upper computer (ARM) when the data volume in the internal FIFO reaches a certain amount or the data in the internal FIFO and no new data is written in a time range exceeding a time range, so that the data taken by the upper computer each time is the complete data which is real-time and is the current consumption receipt.
And a knocking judgment module: the system is used for judging whether additional printing of additional information is required to be carried out or not, and collecting data of a parallel port (generally DB 25) connected with a cash register, but not storing and forwarding the collected data like a data acquisition module, but comparing or matching the current data with the chasing positioning data (key field) according to the chasing setting from an ARM, and if the current data (the number of bytes can be configured) is matched with the chasing positioning data, generating and sending a chasing marking signal to the chasing control module and the abnormity diagnosis module.
A pursuit control module: the printer is used for controlling and coordinating printing of original printing data and additional printing data, when a tracing mark signal of a tracing judging module is received, the analog printer sends a pause signal (a pause data sending signal) to the cash register, controls the cash register to pause sending the original printing data, waits for the upper computer to send additional printing data needing to be traced, stores the additional printing data sent by the upper computer in an additional printing data FIFO (FIFO memory), when the printer can receive the printing data, sends all the printing data stored in the additional printing data FIFO to the printer, and after the sending is finished, the analog printer sends a data transmission resuming signal to the cash register to inform the cash register to continue sending the original printing data.
Additional print data FIFO: for storing additional print data transmitted from the upper computer.
Host computer communication module: the method is used for communication with an upper computer (ARM), and the communication contents mainly comprise working mode configuration (only interception or interception of additional printing), additional printing position configuration, additional printing data and the like.
An anomaly diagnosis module: the module is used for diagnosing the abnormal working condition or state of the whole system, for example, after the system is started, whether the upper computer is in the abnormal working state of the system is judged through a heartbeat signal between the module and the upper computer, if the abnormal starting of the system occurs, the module can generate a reset upper computer signal, so that the upper computer is powered off for a period of time and then powered on again; when the system is in the process of chasing, the upper computer can not generate additional printing data such as two-dimensional codes and the like due to some reason (the upper computer is disconnected), but the upper computer system works normally (a heartbeat signal is output), the module will also generate a signal to inform the FPGA to exit the chase mode, directly enter the intercept only mode, but the upper computer is not reset, specifically, the upper computer can start the tracing abnormal timing after receiving the tracing mark signal of the tracing judgment module, monitors or collects the interface data with the upper computer, when additional printing data of the upper computer are not received after the set time is exceeded, the additional printing is judged to be abnormal, a recovery intercepted working mode signal is sent to the chasing control module and the upper computer at the same time, the chasing control module simulates a printer to send a signal for continuously sending the printing data to the cash register according to the recovery intercepted working mode signal, and the upper computer cancels a process of sending the additional printing data according to the recovery intercepted working mode signal.
The additional printing data can be pre-stored in the ARM, or can be sent by an ARM request platform (a merchant local area network, a cloud platform, or the like).
And the MUX module: the printer is used for selecting to select the output of the additional printing data and the original printing data, switching the connection state of the corresponding internal channel and the output end interface, and selecting to send the original printing data from the cash register or the additional printing data from the upper computer to the printer.
The received original printing data can be sent to a merchant platform in an analyzed or non-analyzed state through the ARM, and the received original printing data can also be sent to the platform through the ARM after additional printing data is inserted into the received original printing data.
The additional printing module can simultaneously send the additional printing mark signal to the ARM, and the ARM sends additional printing data to the FPGA after receiving the additional printing mark signal.
The receipt is generally referred to as a receipt such as a transaction bill and an invoice of a market consumption receipt.
The technical means disclosed by the invention can be combined arbitrarily to form a plurality of different technical schemes except for special description and the further limitation that one technical means is another technical means.
Claims (1)
1. The cash register printing system adopting the parallel port cash register comprises a bridge circuit formed by combining an FPGA (field programmable gate array) and an ARM (advanced RISC machine), wherein the bridge circuit is connected between the cash register and a printer, the input end and the output end of the FPGA are parallel ports, the input end and the output end of the FPGA are respectively connected with the corresponding parallel ports of the cash register and the printer and are used for receiving printing data of the cash register, the printing data added with additional information after bridge processing is transmitted to the printer, an internal bus for communication between the FPGA and the ARM is arranged to realize communication connection of the FPGA and the ARM, the FPGA receives additional printing configuration from the ARM and additional information needing to be printed, the matching of a front field of an inserting position is performed according to the additional printing configuration of the ARM, a signal for suspending the transmission of the printing data is transmitted to the cash register when the matching is successful, the additional printing data is requested or waited to be transmitted to the printer, and the additional printing data transmitted by the ARM is transmitted to the printer, so that the printer prints the additional information at a corresponding position, after receiving the signal of finishing the additional printing of this time of the ARM, sending information of continuously sending the printing data to the cash register so as to be transmitted to the printer, controlling the printer to continuously print according to the printing data of the cash register, finally printing a complete receipt containing the additional information,
the system has 2 working modes, namely an interception mode and a pursuit mode:
an interception mode: the FPGA receives the printing data sent by the cash register and immediately sends the received printing data to the printer,
a pursuing mode: in the place where the additional information needs to be chased, the FPGA informs the cash register to suspend the data transmission at the moment through some parallel port signal states, under the control of the ARM, the printing data of the additional information is transmitted to the FPGA, the FPGA transmits the additional information to the printer, after the chasing is finished, the FPGA enters the interception mode again,
the FPGA is connected between the cash register and the consumption receipt printer, the cash register sends original printing data according to a parallel port protocol, the FPGA sends the printing data sent by the cash register to the printer while receiving the printing data, when additional information needs to be printed, the FPGA sends the printing data of the additional information to the printer,
the main functional modules of the FPGA comprise: the system comprises a data acquisition module, a tracing judgment module, a tracing control module, an FIFO storage module, an upper computer communication module, an abnormity diagnosis module and a MUX module, wherein:
a data interception module: the data acquisition module is used for intercepting original printing data sent by the cash register, acquiring parallel port data connected with the cash register, temporarily storing the acquired data in an internal FIFO of the module, and sending all data in the internal FIFO to the upper computer when the data volume in the internal FIFO reaches a certain amount or the data in the internal FIFO and no new data are written in a time range, thereby ensuring that the data taken by the upper computer each time are real-time and complete data of the current consumption receipt,
and a knocking judgment module: used for judging whether additional printing of additional information is needed or not, collecting parallel port data connected with the cash register, comparing or matching the current data with the chasing positioning data according to the chasing setting from the ARM, if the current data is matched with the chasing positioning data, generating and sending a chasing marking signal to the chasing control module and the abnormality diagnosis module,
and a tracking control module: the printer is used for controlling and coordinating the printing of original printing data and additional printing data, when a tracing mark signal of a tracing judging module is received, the analog printer sends a pause signal to the cash register, controls the cash register to pause the sending of the original printing data, waits for the upper computer to send additional printing data needing to be traced, stores the additional printing data sent by the upper computer in an additional printing data FIFO, sends all the printing data stored in the additional printing data FIFO to the printer when the printer can receive the printing data, and after the sending is finished, the analog printer sends a data transmission resuming signal to the cash register to inform the cash register to continue sending the original printing data,
additional print data FIFO: for storing additional print data transmitted from the upper computer,
host computer communication module: used for communication with an upper computer, the communication contents mainly comprise working mode configuration, additional printing position configuration and additional printing data,
an anomaly diagnosis module: the module is used for diagnosing the abnormal working condition or state of the whole system, after the system is started, whether the upper computer is in the abnormal working state of the system is judged through a heartbeat signal between the module and the upper computer, if the abnormal starting of the system occurs, the module generates a reset upper computer signal, and the upper computer is powered off for a period of time and then powered on again; when the system is in the tracing process, if the upper computer cannot generate the additional printing data but the upper computer system has a heartbeat signal output, the module generates a signal to inform the FPGA to exit the tracing mode, directly enter the interception only mode and not reset the upper computer, and the method specifically comprises the following steps: starting the tracing abnormal timing after receiving the tracing mark signal of the tracing judgment module, monitoring or collecting interface data with the upper computer, judging as additional printing abnormal when no additional printing data of the upper computer is received after the set time is exceeded, simultaneously sending a recovery intercepted working mode signal to the tracing control module and the upper computer, simulating the printer to send a signal for continuously sending the printing data to the cash register by the tracing control module according to the recovery intercepted working mode signal, canceling the flow of sending the additional printing data by the upper computer according to the recovery intercepted working mode signal,
a MUX module: the printer is used for selecting to select the output of the additional printing data and the original printing data, switching the connection state of the corresponding internal channel and the output end interface, and selecting to send the original printing data from the cash register or the additional printing data from the upper computer to the printer.
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| CN111756799B (en) * | 2020-05-20 | 2023-04-07 | 拉扎斯网络科技（上海）有限公司 | Method and device for processing printing information |
| CN113253949A (en) * | 2021-02-05 | 2021-08-13 | 深圳怡化电脑股份有限公司 | Printing control method and device |
| CN117130965A (en) * | 2023-02-24 | 2023-11-28 | 荣耀终端有限公司 | Sensor Hub data management method and electronic equipment |
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