CN2518159Y

CN2518159Y - Multiple serial interface communicating controller

Info

Publication number: CN2518159Y
Application number: CN 02203365
Authority: CN
Inventors: 杨喜春; 王崇福
Original assignee: Individual
Current assignee: Shanghai Luneng China Card System Integration Co Ltd
Priority date: 2002-01-25
Filing date: 2002-01-25
Publication date: 2002-10-23
Anticipated expiration: 2012-01-25

Abstract

The utility model relates to a multi-port communication controller, belonging to the technical field of computer data collection, communication control and IC card application, wherein, the master controller consists of a CPU (central processing unit), an NVM (nonvolatile memory) and a clock. The NVM and the clock are respectively connected with the CPU. A communication interface consists of an interface 232, an interface 485 and a USB8 communication allotter. The interface 232 and the interface 485 are respectively connected with the CPU, and the USB8 communication allotter is connected with the interface 485 and is exchanged data mutually. A monitor of operating and communicating states is connected with the CPU to display the communicating state of the interface 232 and the interface 485. A controller can ensure a real-time collection of transaction data and ensure that a communication with a personal computer does not affect the function of data collection and can work independently. When a power failure occurs, the controller can prevent data from being lost. When power supply is regained, the controller can conduct the real-time data collection to guarantee that cardholders can carry out various transactions of consumer normally.

Description

The multi-serial ports communication controller

Technical field

The utility model relates to a kind of multi-serial ports communication controller, it is to be used to connect various IC-card recognition data collecting units, realize holder come in and go out the function control and the data acquisition of work attendance, all kinds of consumer sales, belong to computer data acquiring, Communication Control and IC-card applied technical field.

Background technology

In various data acquisition information disposal systems, often run into multi-point data acquisition, and the data that collect return to master controller in the mode of serial communication, but master controller generally can only provide RS-232 interface, promptly enabling provides RS-485 interface, at most also can only drive 32 data collecting units, can not satisfy the requirement of big power system capacity far away; On the other hand, the master controller of system generally all also will be born complicated man-machine interaction task, can't guarantee the data that the data collecting unit collects are in time handled.Therefore, and reliability, real-times data bigger when the capacity requirement of system require when very high again, just required a multiport communication controller, the mode with serial communication be responsible for is from each data collection point data collection, not only bear the demanding task of part or all of real-time of system, the effect of playing data buffering simultaneously and stabilizing data stream has higher reliability.

The utility model content

Can not bear complicated man-machine interaction task in order to overcome existing data acquisition information disposal system, can't guarantee that the data that the data collecting unit is collected shortcoming such as in time handle, the utility model provides a kind of multi-serial ports communication controller, make its data acquisition unit that can connect sufficient amount, and can independently realize the accurate real-time communication and the processing controls reliably of large-scale data.

The multi-serial ports communication controller of the utility model design comprises master controller, communication interface and status displays three parts; Described master controller is made up of central processing unit, nonvolatile memory and clock, and nonvolatile memory wherein and clock link with central processing unit respectively, and controlled by central processing unit; Described communication interface is made up of 232 interfaces, 485 interfaces and 8 tunnel communication dividers, and wherein 232 interfaces, 485 interfaces link with central processing unit respectively, mutual swap data, and wherein 8 tunnel communication dividers and 485 interfaces link, mutually swap data; Described operation and communication state display and central processing unit link, to show the communication state of 232 interfaces and 485 interfaces.

The multi-serial ports communication controller of the utility model design, adopt tight serial communication protocol and enough communication speeds, guarantee the real-time collection of 256 data collecting units and the various transaction data of all holders, and assurance and PC communication do not influence the various data acquisition functions of data acquisition unit.Controller can work alone, and PC can carry out other work or shutdown.The controller outage time can guarantee that data do not lose, and the energising back is real-time data acquisition at once, guarantees that all kinds of consumer sales of holder normally carry out.

Description of drawings

Fig. 1 is the structure principle chart of the multi-serial ports communication controller of the utility model design.

Fig. 2 is the circuit diagram of master controller in the controller.

Fig. 3 is the circuit diagram of communication interface in the controller.

Fig. 4 is the circuit diagram of status displays in the controller.

Fig. 5 is the user mode connection layout of multi-serial ports communication controller.

Embodiment

Followingly the principle of work of the multi-serial ports communication controller of the utility model design is elaborated with reference to Fig. 1.Central processor CPU has the dual serial communication interface, and one is divided 8 the road from outside image data with RS-485 hardware interface pattern, and each road can connect 32 data collecting units, and therefore, the total volume of each controller is 256 data collecting units.256 data collecting units of CPU commander are finished various real time data acquisition work, and the data that collect are deposited among the nonvolatile memory RAM by the time Flow Record.Produced by the special clock unit writing time.

Another serial communication interface of CPU links to each other with upper computer PC with the RS-232 hardware interface, finishes the communication between PC and the CPU.CPU also puts into nonvolatile memory RAM to the data that obtain from PC, provide data acquisition unit finish various real time data acquisition work required various data.CPU carries out the data upload that collects the processing statistics printout of various data to PC.

Among the nonvolatile memory RAM of this controller, must standard can store 256 various data, enough cardholder data and data Flow Records of gathering in real time that the data collecting unit is required, and to guarantee the reliable access of data, guarantee the collection accurately and reliably of the various transaction data of holder.The clock unit of controller must be able to produce the time on date accurately, and can proofread by upper PC.

Fig. 2 has shown the circuit of master controller in the controller of the utility model design, M1 central processor CPU wherein, chip for model 77E58, nonvolatile memory RAM, be model MEM512 chip, model is the clock circuit chip of M12887, also has dominant frequency crystal oscillator and MAX705 software watchdog circuit.

Fig. 3 has shown the communication interface circuit of this controller, and wherein MAX232 is that 232 interfaces, MSO-MS7 are circuit chips such as 485 interfaces and 8 tunnel communication dividers.

Fig. 4 has shown the status display circuit of this controller and power module etc.Display circuit comprises that the power supply AC/DC shows, 232 interfaces show with the communication signal demonstration of upper PC and the communication signal of 485 interfaces and 8 tunnel communication dividers and data acquisition unit.

Fig. 5 has shown this controller system's connected mode the most commonly used, its application scenario is very extensive, is mainly used in all kinds of consumption management systems of dining hall catering dormitory gate inhibition of university campus card system and all kinds of consumption management systems of discrepancy work attendance salary management logistics management of industrial enterprise's card system.Each controller can connect 256 data collecting units, links to each other with upper control center's computer PC.PC can be finished the Elementary Function setting to 256 data collecting units, carries out the foundation in cardholder data storehouse, realizes the processing statistics printout of various image data.

Claims

1, a kind of multi-serial ports communication controller is characterized in that, this controller comprises master controller, communication interface and status displays three parts; Described master controller is made up of central processing unit, nonvolatile memory and clock, and nonvolatile memory wherein and clock link with central processing unit respectively, and controlled by central processing unit; Described communication interface is made up of 232 interfaces, 485 interfaces and 8 tunnel communication dividers, and wherein 232 interfaces, 485 interfaces link with central processing unit respectively, mutual swap data, and wherein 8 tunnel communication dividers and 485 interfaces link, mutually swap data; Described operation and communication state display and central processing unit link, to show the communication state of 232 interfaces and 485 interfaces.