JPS60163189A - Card reader controller - Google Patents

Abstract

PURPOSE:To check abnormality of the running speed of a card by measuring intervals of a clock signal led out from a card reader. CONSTITUTION:A clock signal inverted RCP outputted from a card reader 1 is counted, and counted values corresponding to maximum and minimum card running speeds are stored in buffers TMAX and TMIN respectively. At the time when the reading operation of the card is terminated or by the operation of a keyboard 4 due to an operator, stored contents of said buffers TMIN and TMAX are transferred to an area A of a RAM6 and are displayed on a display device 8 through a display buffer DBB. Simultaneously, they are printed by a printer 9; and thus, the operator watches displayed data to detect always whether the card is read normally or not.

Description

[Detailed Description of the Invention] <Technical Field of the Invention> The present invention relates to an improvement of a card reader control device, and more specifically, it is possible to determine whether the running speed of a card is good or bad in a manual card reader, etc. The present invention relates to a card reader control device.

<Technical background of the invention and its problems> Generally, in a card reader, fluctuations in the running speed of the card affect the performance of the reading operation.

For example, in a manual magnetic card reader, since the card is moved manually, the running speed varies greatly. In addition, if the card is running too fast in the card reader and control unit, it will not be possible to process the card to keep up with that speed, and if it is too slow, the read signal from the magnetic card reader, etc. will not be detected. There are limits,
It is necessary to move the card at a predetermined running speed.

In conventional card readers, when a card reading error is detected, the error content can be detected by the application. It is difficult to determine whether it is an error when the data is read too fast, too slow, etc.).

<Object of the Invention> The present invention has been made for the purpose of providing a card reader control device that eliminates the above-mentioned conventional problems.
To achieve this objective, the card reader control device of the present invention comprises a measuring means for measuring the interval of clock signals derived from the card reader, and a linkage to the body-side result of this measuring means. The apparatus is configured to include a storage means for storing the information, and a retrieval means for reading out the stored contents of the storage means.

(Embodiment of the Invention) Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings. 3. FIG. 1 is a block diagram showing the configuration of an apparatus in which the present invention is implemented.

In Figure 1, 1 is a magnetic card reader, 2 is a magnetic %fJ
-1"J-ri1's controller 1-loafy (MCR controller), 3 is a main CPU configured as, for example, Z80AK, 4 is an input keyboard, and 5 is a ROM.

6 is a RAM, 7 is an input/output ink face, 8 is a display device, and 9 is a printing device.

The minimum and maximum values of the measured timer values are stored in the terms described later in connection with the present invention.
The X area is set in a predetermined area of the internal RAM 21 of the controller 2. Note that if controller 2 is not used, the MIN and TMAX areas are
It is set in area A of RAM 6 of .

FIG. 2 is a flow diagram showing an application for card reading speed detection and storage, and this flowchart will be described below.
The present invention will be explained with reference to the figures.

Prior to the read operation of the car I-, for example, TMIN and TMAX, which are set for 1 byte each in an arbitrary area of the internal RAM 21 in the controller 2, are initialized, and the buffer TMIN is initialized with FF''. value is set, and the initial value of o o'' is set in TMAX (step nl). Next, when a card is inserted into the card reader IK from the card waiting state, the insertion of the card is detected by the card reader IK according to a conventionally known configuration, and the card reader 1 outputs a card insertion signal CLS (“
°L°° level signal (see Figure 4), when the "L" level of this card insertion signal CLS is detected (step n
2), proceed to the next step n3. After the card reader 1 detects the insertion of the card, it starts reading the information recorded on the card. According to this reading operation, a clock signal 7 of 1 is output from the card reader 1 according to a conventionally known configuration. be done. This clock signal RCP is, for example, a read signal of a synchronization signal track recorded on the card, or a clock signal created from read information using a self-clock method, and its period corresponds to the card running speed. There is. step n3
When it is detected that the clock signal RCP becomes ``L'', the process proceeds to step n4, where the timer operation is activated and the timer starts counting. Next, in step n5, by detecting that the falling edge of the next clock signal RCP is 9, the timer operation in step 2 is started at +LL (step n6), and the timer is set to the working clock in the CPU. is temporarily stored in W R (step n7).
), the timer operation is activated again and the next timer starts counting (step n8).

Next, the process moves to step n9 and compares the contents of the timer count value T stored in the working register WR in step n7 with the contents stored in the buffer TMIH. , write the memory contents of the working register WR < TMINK and update the memory contents of the TMIH. Step n1
(1). Next, the process moves to step n11, and the contents of the timer count value 'r stored in the working register WR in step n7 are compared with the contents stored in the buffer TMAX, and only when WR<TMAx,
Hanfu IT M with the memory contents of Working Crescing WR
A
After that, the operations of the stethogens n5 to n12 are repeated until the card reading operation is completed.

Through the above operations, the timer count value corresponding to the running speed of the highest card is stored in the buffer ITMIN, and the timer count value corresponding to the running speed of the lowest card is stored in the buffer TMAX.

FIG. 3 shows that the buffers TMIN and TM are
FIG. 2 is a flow diagram illustrating an application that reads values stored in AX.

Now, in FIG. 3, at the end of the card reading operation or by an operator's instruction from the keyboard 4, the contents of the buffer TMIN are transferred and stored in the A area in the RAM 6, and the contents are further transferred to the display output buffer DB in the CPUa.
B (step 7 n 2 + ), and buffer I
The contents of TMAX are transferred to area A in RAM6 and stored.
Further, the contents are outputted to the display buffer DBH in the CPC 3 (nutenop n22), and the minimum and maximum timer values transferred to the display buffer DBB are displayed on the display device 8 and printed on the printing device 9.

The running state of the card can be known by checking the display or print output of the timer values TMIN and TMAX measured during the running operation of the card as described above.

That is, the TMIN value and TMAX value mentioned above are the minimum and maximum values of the counts counted by the timer at the interval of one cycle of the clock signal RCP from the card reader 1, and the actual one cycle time TB of RCP is, respectively. It corresponds to (the reciprocal of) the running speed of the card.

Therefore, by setting these values, the following can be performed.

■The limit value at which the card can be read normally is the TMIN value and TM.
By displaying or printing this value based on the AX value, it is possible to know the reading ability of the card reader, and by comparing it with the card reader's specifications, for example, it is possible to determine whether the card reader is good or bad. .

■ Based on the specifications of the card reader, determine the appropriate speed range for card running (speed within the standard), and compare it with the TMIN and TMAX values corresponding to the actual running speed. It is possible to judge whether or not the text is being read at an appropriate speed.

<Effects of the Invention> As described above, according to the card reader control device of the present invention,
It is equipped with a measuring means for measuring the interval of clock signals derived from the card reader, a storing means for storing a value calculated from the measurement result of the measuring means, and a reading means for reading out the stored contents of the storing means. Because it is configured as
It becomes possible to determine whether the traveling speed of the card is appropriate based on the stored contents of the storage means, and as a result, the reliability of the card reader can be improved.

[Brief explanation of drawings]

Fig. 1 is a block diagram showing the configuration of a device implementing the present invention, Fig. 2 is a flow chart showing an application for detecting increased card reading speed and storing data, and Fig. 3 is a flow chart showing an application for reading out stored contents. 4 are signal wave and shape diagrams for explaining the operation of the device of the present invention. 1...Card reader, 2-...Controller, 3...
CPU, 6...RAM, 8...Display device, 9...
Printing device, TMIN...measurement minimum value storage area,
TMAX...Measurement maximum value storage area, 1 for ■...Clock signal.

Claims (1)

[Scope of Claims] 1. Measuring means for measuring the interval of clock signals derived from a card reader, storage means for storing a value corresponding to the measurement result of the measuring means, and storage contents of the storage means. A power-reader control device comprising: reading means for reading. 2. The card reader control device according to claim 1, wherein the storage means is configured to store maximum and minimum values of the measurement results.