JPH0452784A - Data reception device - Google Patents

Abstract

PURPOSE:To judge whether a card-like device is set or not by providing a set means, a reception means and a judgement means. CONSTITUTION:A part of optical output is inputted to a phototransistor 17 by a half mirror 13 by the optical output emitted from LED 5. A signal string is inputted to a control part 11 and the part 11 recognizes that a card 9 is installed by detecting the code. A control part 3 sets LED 5 in a continuous lighting state and visually and audibly gives information that the card is accurately set when a ready code is transmitted from the card 9. When it is not transmitted, an alarm and guidance are displayed. Thus, the host 1 and the card 9 mutually detect the prescribed code and therefore the card is detected to be normally installed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a data receiving device that receives data from a card-like device.

[Conventional technology]

Conventionally, in this type of device, whether or not a card-like device has been set has been determined based on a dedicated mechanical switch.

[Problem that the invention is trying to solve]

However, the above-mentioned conventional example has problems such as a complicated structure, increased cost, and frequent malfunctions.

[Means to solve the problem]

In contrast, the present invention provides a setting means for setting a card-like device, a receiving means for receiving data from the card-like device, and whether or not the card-like device is set based on the output of the receiving means. By providing a determining means for determining whether or not the card-like device has been set, the receiving means can be used to determine whether or not the card-like device has been set.

〔Example〕

In this embodiment, data is transmitted and received between the cart 9 and the host 1 using light. The host 1 has a light emitting section LED5 serving as a data transmitting section and a light receiving section phototransistor 7 serving as a data receiving section. On the other hand, the host 1 divides the light emitted from the card 9 by a half mirror 13, sends one part to the light receiving part/phototransistor 17 which becomes its own data receiving part, and sends the remaining part to the data transmitting part. Light enters the host l light receiving section phototransistor 7 through the transmitted light control section liquid crystal 15 to perform communication.

FIG. 1 shows the configuration of this embodiment, where 1 is a host having an optical transmitting and receiving section using an LED and a phototransistor, 3 is a control section that controls the host 1, 5 is an LED serving as a light transmitting section,
7 is a phototransistor which becomes a light receiving section, 9 is a liquid crystal 15
11 is a control unit for controlling the card 9; 13 is a half mirror; 115 is a transmissive liquid crystal; and 17 is a phototransistor.

In the above configuration, in the initial state, the host 1 and the card 9 are not optically coupled. When the card 9 is inserted into the U-shaped recess of the host 1 and optically coupled, the card 9 will then shift to a data transmission/reception mode. The above operation will be explained using the flowcharts in FIGS. 2 and 3 and the timing chart in FIG. 4.

First, the control unit 3 of the host 1 assigns 2 to N as an initial setting (SL). In standby state 1. A signal as shown in FIG. 4 is applied to the LED 5 to cause the LED 5 to emit light and output a predetermined code (S2). Here, it is assumed that the LED 5 emits light when the applied voltage is high. And in this example, "
A predetermined code J is represented as a sequence of 1001 signals. At this time, the control unit 3 photoelectrically converts the light received by the phototransistor 7 and determines whether the output is the same code as the code output to the LED 5 (S3). and,
If they are the same code, it can be determined that the card 9 is not installed between the LED 5 and the phototransistor 7.

On the other hand, the control unit 11 of the card 9 outputs a high level to the liquid crystal display 15 in the standby state.S2. l), keep the liquid crystal 15 in a light-shielded state. Therefore, by attaching the card 9 to a predetermined position of the host l, the LED 5
The optical path from the phototransistor 7 to the phototransistor 7 is blocked by the liquid crystal 15. Therefore, the phototransistor 7 has 1oo
The code of i is output and disappears, and the control unit 3 reads the card 9.
detects that it is attached. At this time, an appropriate value is set for N, and it is confirmed that the code 1001 is not output continuously for the specified number of times (S4 and S5). Further, at that time, a part of the light output emitted from the LE and D5 is inputted to the phototransistor 17 by the half mirror 13, and the signal string 1001 is inputted to the control section 11. By detecting this code, the control unit 11 knows that the card 9 has been inserted (S22).

Next, the control unit 3 turns the LED 5 into a continuous lighting state (S6).
, sent from card 9 (READY)
A code (101.0 in the example of FIG. 4) is waited for a certain period of time (S7-5io). Then, within that certain period of time, READ
When the Y code is received, it shifts to communication mode (S9). At this time, it visually and audibly indicates that it has been set correctly. Also, if the READY code does not arrive within a certain period of time, the card 9 may not be installed correctly, or
Since a malfunction such as a foreign object entering the optical path is assumed, an alarm, guidance, etc. is displayed visually or audibly after a certain period of time (S11.). For example, an error sound such as "beep beep" or a kai dance such as "please try again".

In this way, the host 1 and the card 9 detect that they have been correctly installed by detecting a predetermined code from each other, so there is no need for a detection element to detect the installation, leading to cost reduction and miniaturization of the device. It has become possible. Furthermore, since the detection is performed using an actual data transmitting/receiving section, and the detection is performed using a predetermined code, the reliability of detection is improved.

Further, when the card is set correctly, the name of the owner of the card 9 received from the card 9 after that is displayed. Therefore, you can see at a glance whose cards are set.

Further, the card 9 that has received the code 1001 from the host 1 first detects whether the LED 5 is continuously lit for a certain period of time in order to output the code 1010 to the host (823-525). When the light is turned on continuously, the light from the LED 5 to the phototransistor 7 is turned on and off by turning on and off the drive of the liquid crystal 15.
It transmits the code 010 to host l (S26) and shifts to communication mode (S27). At this time, it visually and audibly indicates that the settings have been made correctly. On the other hand, if the LED 5 does not turn on continuously for a certain period of time, it is considered that the host 1 could not detect that the card 9 was inserted. Therefore, an alarm or cadence is displayed visually or audibly (S28).

In the actual transmission/reception operation, when transmitting data from the host 1 to the cart 9, the signal output to the LED 5 is input as is to the phototransistor 17, so the controller 3
transmits data by outputting a signal string to the LED 5. Furthermore, in the case of transmission from the card 9 to the host 1, the control section 3 first turns on the LED 5. When the control unit 11 detects this and outputs a signal to the liquid crystal 15,
Accordingly, the inverted signal is output to the phototransistor, and data is transmitted.

Through the above-described operation, data is transmitted and received in a half-duplex manner, but in this embodiment, it is possible to stop the transmitter from the side of the receiving device that is receiving data. first,
Consider the case where host 1 is the receiving side and card 9 is the transmitting side. FIG. 5 shows a flowchart of the control section 3, FIG. 6 a flowchart of the control section 11, and FIG. 7 a timing chart. The host lights LED 5 during reception (S31.532).

The light output emitted by LED 5 is always transmitted to phototransistor 1.
7, so if the control unit 3 wants to stop the reception (S33.534), it can output a stop code to the LED 5 (S35). For example, when the LED 5 is turned off, the phototransistor 17 is turned off. When the control unit 11 detects this, as shown in FIG. 7, even if data is being transmitted (S41-543), it immediately stops transmitting (S44).

Next, consider the case where the card 9 is on the receiving side and the host 1 is on the sending side. FIG. 8 shows a flowchart of the control section 3, FIG. 9 a flowchart of the control section 11, and FIG. 1O a timing chart. The control unit 11 outputs a high level to the liquid crystal 15 during reception (S61.562) so that the light output of the LED 5 is not received by the phototransistor 7 (and turns off the liquid crystal 15 when stopping transmission. Then (863-565), the light output from the LED 5 is received by the phototransistor 7.

When the phototransistor 9 turns on during transmission (S51-
353), the control unit 3 detects this and stops the transmission (S
54). Criteria for stopping the transmission include, for example, a reception abnormality or an interruption caused by an operator's key operation.

Further, it is also possible to perform full-duplex communication using the configuration of this embodiment. This will be explained using the timing chart of FIG. 11 as an example. Now, the control unit 3 of the host 1 is displaying 101 on the LED 5.
Suppose that the code O is being output. This code signal is L
Through the ED5 and the phototransistor 17, it is similarly outputted to the phototransistor 17 as 101O and is output to the control section 11.
received at Also, at that time, as soon as the control unit 11 detects that the received data becomes rlJ, it displays 00
Outputs 10 codes. At that time, if the length of this 4-bit signal string is set shorter than the 1-bit cycle of the LED 5, the phototransistor 7 will have 11
A code signal of 01 is output, and the control unit 3 can receive this signal. That is, the control unit 11
It detects that D5 is in a lit state, turns on and off the liquid crystal 15, and transmits data. In this case, full-duplex communication cannot be performed unless the LED 5 is lit, so as a code from the host 1 to the card 9,
For example, you should always use a code system that starts with "l".

Next, another example of the full-duplex communication system will be explained using FIG. 12. In this case, contrary to the previous example, card 9
LED5 during the 1 bit period of O of the output code transmitted by
4-bit data is output to the LCD 15, and the code to be output to the liquid crystal 15 is set to a code system such that it always starts with O, for example.

Also, the codes from the host l to the card 9 and from the card 9 to the host l are always l.

Although we assumed that the code starts with O, it does not necessarily have to start with 1 or 0, but there should be at least one digit in the code.
．． This is also possible using a code that includes 0.

As explained above, in a device that transmits and receives data using light, it is no longer necessary for each device to have a light emitting section, making it possible to reduce costs and downsize the device. Furthermore, power consumption is reduced and battery life can be extended.

[Other Examples]

In the embodiment of FIG. 1, the LED 5 is replaced by an E, L (electroluminescent) lamp, plasma, the phototransistor 7.17 is replaced by a photodiode, or
It may be replaced with an element having a similar function, such as an element whose resistance value changes depending on light.

Furthermore, if the light is reflected once by the mirror 19, the same effect can be achieved with the structure shown in FIG.

Alternatively, the host 1 may be provided with a plurality of LEDs, and the LED for transmitting data to the card 9 and the LED for illuminating the liquid crystal 15 of the card 9 may be separated. In this case, the half mirror 13 is not necessary.

Further, depending on the case, the card 9 may be provided with an LED. Then, the LED of the card 9 may be turned on and off according to the transmitted data.

〔Effect of the invention〕

According to the present invention, it is possible to accurately determine whether the card-like device has been set based on the receiving means. Therefore, it is possible to prevent reception errors from occurring.

[Brief explanation of drawings]

FIG. 1 is a block diagram of the embodiment. FIG. 2 is a flowchart of card set detection for host l in the embodiment. FIG. 3 is a flowchart of card set detection for card 9 in the embodiment. FIG. 4 is a card set detection flowchart for card 9 in the embodiment. Timing diagram of set detection; FIG. 5 is a flowchart for canceling reception by the host 1 in the embodiment; FIG. 6 is a flowchart for canceling reception in the card 9 in the embodiment; FIG. 7 is a request for canceling transmission to the card 9 in the embodiment. FIG. 8 is a flowchart for canceling transmission by host l in the embodiment, FIG. 9 is a flowchart for canceling transmission by card 9 in the embodiment, and FIG. 10 is a timing chart for requesting host 1 to cancel transmission in the embodiment. 11 and 12 are timing diagrams of full-duplex communication in this embodiment, and FIG. 13 is a block diagram of another embodiment. 1 is a host, 3 is a control section, 5 is an LED, 7 is a phototransistor, 9 is a card, 11 is a control section, 13 is a half mirror, 115 is a liquid crystal, and 17 is a phototransistor. The block diagram of the Enbi mo pull line, and the block diagram of the 4th row of beautification of Ton and Rozo.

Claims (6)

[Claims] (1) a setting means for setting the card-like device;
A data receiving device comprising: receiving means for receiving data from the card-like device; and determining means for determining whether the card-like device is set based on an output of the receiving means. (2) A data receiving apparatus according to claim 1, wherein the receiving means includes a light receiving means. (3) A data receiving device according to claim 2, wherein the receiving means includes a light emitting means. (4) The data receiving device according to claim 3, wherein the determining means determines that the card-like device is set based on interruption of light reception by the light receiving means. Device. (5) The data receiving device according to claim 1, wherein the determining means determines whether or not the card-like device is set based on reception of a specific code by the receiving means. Device. (6) The data receiving apparatus according to claim 1, wherein the determining means includes display means for displaying the determination result.