CN205581880U - A general converter of data for magnetic card reader - Google Patents

Abstract

The utility model belongs to the technical field of the electron, a a general converter of data for magnetic card reader. Wherein general converter includes: shaping circuit, singlechip, serial circuits. When data input, the CLOK pulse triggers singlechip external interrupt, the data of singlechip through reading P1.0 through shaping circuit to do you after carrying out corresponding data processing, through RS232 output, realize magnetic card reader CLOK DATA data signal arrives ordinary serial data's conversion. Utilize the serial communication data format who the most often uses to carry out data record in the engineering, realize magnetic card reader data identification's universalization, transmission distance's long -rangeization, the intellectuality of discernment mode.

Description

A kind of data general-purpose transducer for magnetic card reader

Technical field

The invention belongs to electronic technology field, be mainly used in the identification to magnetic card signal and carry out the conversion of general RS232 data form.

Background technology

The application of magnetic card is very universal, and especially banking system application is the most, although currently promote the application of IC-card, but magnetic card exits still some time；nullAt present many number systems of application are desirable that and must be compatible with magnetic card signal，But mostly current magnetic card signal is CLOK-DATD signal by what reader exported，This data form is not a kind of general international standard，But because most of producers follow such a transmission mode，So achieving the accreditation of industry and observing，Various control equipment also can only adapt therewith，CLOK-DATD data define as shown in Figure 1: bus definition is two-wire system form，Identify with CLOK-DATD respectively，When there is no data，Article 2, line is all low level，When having data to export，CLOK exports data high impulse，DATA exports data，Data are formed by 5，Wherein first place is to post even parity bit，Heel 4 bit data，Total data have 37，Magnetic card 2 rail data define the card images such as bank's serial number.

Owing to CLOK-DATD bus is not a kind of international standard or national standard, the most do not produce the identification module or integrated circuit adapted therewith, and a kind of data transfer mode that only some equipment of Some Enterprises is followed, especially front end recognition equipment, if other business equipment is matched, must adapt therewith, and existing control equipment, it it is all the unconfined technology requirement meeting front end recognition device, for the reader used in product, need to design the controller data port of oneself, to actual user, the selection of reader is brought certain limitation, the installation of product is also restrained.

Summary of the invention

For the problems referred to above, the present invention proposes a kind of data general-purpose transducer for magnetic card reader

A kind of data general-purpose transducer for magnetic card reader, specifically includes that shaping circuit, single-chip microcomputer, serial interface switching circuit；

Wherein, shaping circuit is connected with CLOK and DATA line respectively, promotes its driving force and the P1.0 input/output terminal of level reverse process, outfan and single-chip microcomputer and the external interrupt mouth INT0 of single-chip microcomputer is connected；The TXD serial ports transmitting terminal of single-chip microcomputer is connected with RS232 serial communication circuit respectively with RXD serial ports receiving terminal.

Described shaping circuit uses model to be the circuit of 74LS06.

Described single-chip microcomputer model is 89C2051 single-chip microcomputer.

Described serial port circuit is RS232 serial port circuit.

A kind of using method of the data general-purpose transducer for magnetic card reader, including:

Step 1, interruption and serial ports to single-chip microcomputer initialize, storehouse is set, empty data field, arranging data storage and data length counter, arranging external interrupt INT0 is that trailing edge triggers interruption, arranges serial ports, No. 0 intervalometer and No. 1 intervalometer are set, data length clear 0, arranges external interrupt, allows that intervalometer and external interrupt trigger and interrupts；

Step 2, the CLOK-DATA bus receiving single-chip microcomputer input data are identified, when there being data to input, i.e. INT0 pin has negative pulse, the external interrupt mouth INT0 of single-chip microcomputer is triggered by trailing edge and causes interruption, ensure that each negative pulse is only interrupted once, read the P1.0 pin level of single-chip microcomputer when interrupting, identify CLOK-DATA bus data position, data bit stored simultaneously and count；

Intervalometer in step 3, single-chip microcomputer judges whether the input of CLOK-DATA bus data terminates, and when INT0 pin positive pulse exceedes the setting time, causes No. 0 timer interruption, then carries out data process, finally the data put in order exported in serial port circuit.

In described step 1, the Configuration of baud rate of No. 1 intervalometer is 9600bps/s, and arranging No. 1 intervalometer is the pattern with 8 bit timing devices of heavy duty automatically, and No. 0 intervalometer is set to the pattern of 16 bit timers；The time that sets of No. 0 intervalometer is as 10ms.

The beneficial effects of the present invention is: by the application of this invention product, make CLOK-DATA signal can be highly convenient for identifying, realize being connected easily and effectively of headend equipment and rear end equipment, it is developed and applied simpler by relevant device manufacturer, programming is also more prone to, effectively reduce the obstacle of mutual interface between equipment, make product versatility higher；A kind of CLOK-DATA data signal the most easy to identify is converted to Universal Serial, thus provides convenient for the connection between product；Unified CLOK-DATA evaluator, serial communication data form most-often used in utilizing works carries out data record, carries out reader data transmission by RS232 bus, it is achieved the generalization of reader data identification, the intellectuality of recognition method.

Accompanying drawing explanation

Fig. 1 is that CLOK-DATA bus data defines schematic diagram；

Fig. 2 is the data converter circuits principle schematic of CLOK-DATA bus.

Detailed description of the invention

Elaborate below in conjunction with the accompanying drawings.A kind of using method of the data general-purpose transducer for magnetic card reader, including: shaping circuit, single-chip microcomputer, serial port circuit；

Wherein, the outfan CLOK of shaping circuit and magnetic card reader DATA line be connected, be connected with the P1.0 input/output terminal of single-chip microcomputer after the DATA input shaping of circuit, after CLOK outfan shaping, the external interrupt mouth INT0 with single-chip microcomputer is connected；The TXD serial ports transmitting terminal of single-chip microcomputer is connected with serial port circuit respectively with RXD serial ports receiving terminal.

Described shaping circuit uses model to be the circuit of 74LS06.

Described single-chip microcomputer model is 89C2051 single-chip microcomputer.

Described serial port circuit is RS232 serial port circuit.

A kind of data general-purpose transducer for magnetic card reader, specifically includes that

Step 1, interruption and serial ports to single-chip microcomputer initialize, storehouse is set, empty data field, arranging data storage and data length counter, arranging external interrupt INT0 is that trailing edge triggers interruption, arranges serial ports, No. 0 intervalometer and No. 1 intervalometer are set, data length clear 0, arranges external interrupt, allows that intervalometer and external interrupt are interrupted；

Step 2, the CLOK-DATA bus receiving single-chip microcomputer input data are identified, when there being data to input, i.e. INT0 pin has negative pulse, the external interrupt mouth INT0 of single-chip microcomputer receives trailing edge and triggers interruption, ensure that each negative pulse is only interrupted once, read the level of the P1.0 input/output terminal of single-chip microcomputer when interrupting, identify CLOK-DATA bus data position, data bit arranged simultaneously, store and count；

Intervalometer in step 3, single-chip microcomputer judges whether the input of CLOK-DATA bus data terminates, and when INT0 pin positive pulse exceedes the setting time, causes No. 0 timer interruption, and carries out data compilation, then output data in serial port circuit.

In described step 1, the Configuration of baud rate of single-chip microcomputer intervalometer 1 is 9600bps/s, and arranging single-chip microcomputer intervalometer 1 is the pattern with 8 bit timing devices of heavy duty automatically, and single-chip microcomputer intervalometer 0 is set to the pattern of 16 bit timers；The time that sets of No. 0 intervalometer is as 10ms.

Embodiment one

General purpose converter uses 89C2051 single-chip microcomputer to connect as in figure 2 it is shown, be linked into the P1.0 port of single-chip microcomputer after DATA input signal shaping as core, hardware；CLOK is connected with single-chip microcomputer external interrupt mouth INT0 after shaping；Export by serial port TXD/RXD and carry out corresponding RS232 conversion output, can be connected with the equipment being capable of identify that its port, thus realize the conversion to normal serial data of the magnetic card reader CLOK-DATA data.When there being data to input, after CLOK shaping, there is negative pulse to export, cause single-chip microcomputer external interrupt, after single-chip microcomputer carries out corresponding data identification and processes, exported by RS232.

The above; being only the present invention preferably detailed description of the invention, but protection scope of the present invention is not limited thereto, any those familiar with the art is in the technical scope that the invention discloses; the change that can readily occur in or replacement, all should contain within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with scope of the claims.

Claims (4)

1. the data general-purpose transducer for magnetic card reader, it is characterised in that realize the conversion to RS232 Universal Serial of the magnetic card reader CLOK-DATA data；Hardware specifically includes that shaping circuit, single-chip microcomputer, serial port circuit；Wherein, the input of shaping circuit, CLOK data wire with magnetic card reader output is connected with DATA line respectively, and the output after DATA shaping is connected with the P1.0 input/output terminal of single-chip microcomputer, and the output after CLOK shaping is connected with the external interrupt mouth INT0 of single-chip microcomputer；The TXD serial ports transmitting terminal of single-chip microcomputer is connected with serial port circuit respectively with RXD serial ports receiving terminal.

Data general-purpose transducer for magnetic card reader the most according to claim 1, it is characterised in that described shaping circuit uses model to be the circuit of 74LS06.

Data general-purpose transducer for magnetic card reader the most according to claim 1, it is characterised in that described single-chip microcomputer model is 89C2051 single-chip microcomputer.

Data general-purpose transducer for magnetic card reader the most according to claim 1, it is characterised in that described serial port circuit is RS232 serial port circuit.