SU1298733A1 - Information input device - Google Patents

Abstract

The invention relates to automation and computing and can be used in automated process control systems. The aim of the invention is to increase reliability by allowing the device to be monitored. Using the entered two registers 9, II, the decoder 10, element 15, the device is set to a state in which it is possible to carry out a preliminary test of the operability of the light pen 1 before entering each character. 3 cl. p ush (lk;) from 00 «4j 00 with Fi 1

Description

The invention relates to the field of automation and computer technology and can be used in automated process control systems.

The aim of the invention is to increase reliability by providing the ability to monitor the operability of the device.

FIG. 1 shows the structured diagram of the device; in fig. 2 - the algorithm for testing the health of the device; in fig. 3 character input algorithm

The device for inputting information 5 contains a light pen 1 in which there is a light-sensitive element 2, terminal contact 3, resistors 4-6, differential amplifier 7 and button 8, first register 9, decoder 10 20 20 ba information generated from the second register 11, the second trigger 12, the first trigger 13, the second, third and first elements And 14, 15, 16, respectively, the outputs and outputs of the device 17 - 20.

The algorithm for testing the device operability (Fig. 2) contains blocks 21 of forming a control word for an information input device, a block 22 for checking the occurrence of a signal at the output of the light pen, a block 23 for checking for no occurrences / signals from a button 8, a block 24 for illuminating the whole frame device (ICS), block 25 of forming a control word, block 26 of forming a time delay for the time of one frame scan period VKU, block 27 of checking the arrival of a signal from the light pen 1, block 28 of generating a control about words and taking pictures from the screen of the VCU, block 29 of forming the time delay for the time of one period of the frame scan of the VCP, block 30 checking the absence of 45 signals from the light pen 1, block 31 of indicating on the VCP about the failure of the information input device.

25

Rum N, block 35 of forming the time delay for the time of one frame sweep of the internal control unit, a unit for checking the signal from the driver 1, block 37 for increasing the light button by one, checking for absence of exceeding the current number of the light bar of possible keys in this information input bar , block 39 indus about the error of information input, the formation of the next frame of the operation on the internal control unit for continuation of

The device works as follows.

The normal state of the device for entering information is the trace light pen 1 does not touch e VKU 21, which displays

COMPUTER. at the same time, in the light contact terminal 3 is open and pry 4 - 6 form an unbalanced bridge. The force input to the inverted input is much greater than to the direct input, therefore, n de amplifier 7 will have a negative potential, which will be reproduced by the input of the second element as O.

35

40

To bring information input device, it is not possible to set the second trigger 12 and the first herr 13 to zero. For this, a control word is entered from the computer to the input, containing 1 in zero and fourth dah, which is issued from the computer SU corresponding to the address d of the device, which is determined using the decoder 10. At the control input 19, the data will connect bidirectional 17 of the first register 9 to his dams, as a result of which the control word from the inputs 17 is transmitted to the second trigger 12 and the first 13, set them to

The input algorithm of one character or command word (Fig. 3) contains a block 32 for setting the number of the first generated light button or symbol H and the number of such keys or symbols possible at this information input step H1, the block 33 for initializing the information input device, block 34 for generating screen of the LEDs of the light button or the symbol with the number

0

5 0 ba information, formed with

45

five

rom H, block 35 of forming a time delay for the time of one frame-scan period of the internal control unit, block 36 for checking the signal from the light pen 1, block 37 for increasing the number of the light button by one, block 38 for checking that the current number does not exceed the number of possible keys in the current the step of entering information, the block 39 of the indication of an error of entering information, the block 40 of forming the next frame of information on the ICS to continue the dialogue.

The device works as follows.

The normal state of the information input device is the following: the light pen 1 does not touch the screen of the ICS 21, on which is displayed

COMPUTER. at the same time, in the light pen, 1 terminal contact 3 is open and resistors 4 - 6 form an unbalanced bridge. A much higher voltage is applied to the inverted input of amplifier 7 than to the direct input, so the output of amplifier 7 will have a negative potential that will be perceived as the input of the second element And 14 as O.

To bring the device into readiness, for input of information, the second trigger 12 and the first trigger 13 must be set to the zero state. For this, a control word is entered from the computer to the inputs 17, containing 1 in zero and fourth dax, which is output from the computer to the address corresponding to the address of this device, which is determined by the decoder 10. At the same time, the signal at input 19 of the data transmission control connects Bidirectional inputs 17 of the first register 9 to its outputs, as a result of which the control word from inputs 17 is transmitted to the inputs of the second trigger 12 and the first trigger 13, sets them to zero

condition. In this case, it is possible to configure the device to work with the formation of requests for interruption when the button 8 is pressed, or when light is incident on the photosensitive element 2, or to work without generating interrupt signals. To set premask masks (mode of operation without generating interrupt requests) in the control word, the second and third

bits must have a single value. In order to prevent the signal from passing when light is transmitted to the photosensitive receiver 2 from an external control source, the signal from the light pen 1

l y (the first category should have a word O.

To enter the information, the operator sets the light pen 1 to the desired light button on the screen of the VCS 10 and presses the button 8. At the same time, the first trigger 13 is switched to the one state and at its output

This is done in order to exclude the triggering of the device for entering information from an external source of light radiation. The signal from the second output of register 11 is also fed to the input of the third element 15, prohibiting the generation of an interrupt request signal when the signal from

1, which is fed to the information and light pen 1. The signal from the third input of the first register 9 and to the inputf5 of the output of the second register 11 is fed to the first element AND 16. If the device to the input of the first element AND 16, the signal for entering information is set to work with forming an interrupt signal when the button 8 is pressed (in the register 11 there is no mask for the interruption 20 of the signal of the button 8), then the third output of the register 11 will also be 1 and

The installation of the second 12 and first 13 triggers to the zero state is then checked. For this, the computer reads data from a device with an address corresponding to this device to enter information.

the output of the first element AND 16 is turned on the signal that is output from the output 20 to the computer and causes the processing program as a result of this, the signal from the output of the input interrupt processing, the algorithm of the decoder 10 allows reading from which is shown in FIG. 3. bi-directional inputs 17 information

from the information inputs of the first time to enter information into the state of the second 12, enter each command of the execu-jo and first 13 triggers. If at least the device is tested by inputting information according to the algorithm shown in FIG. 2. The control word is set to 11101 (all values of the control word are in binary form), which means resetting the second trigger 12, prohibiting the transmission of the signal from the light pen 1 through the second element 14 to the input of the second trigger 12, setting the interrupt request mask and resetting the first trigger 13 to the zero state. This control word is outputted as data to the computer inputs 17 at the address corresponding to the address of this device of the first trigger 12 to the unit of information, while the input 19 reads the information is a signal that in the first register 9 selects the mode where bidirectional input is connected to the flip-flops is vyhoodin in the unit state, this indicates failure of the device.

In the case of normal operation of the triggers, block 24 is used to completely illuminate the CCS screen. After that, a control word equal to 11110 is formed, allowing the signal from the light pen 1 to pass through the second element 14 to the input of the second trigger 12. After a time equal to the frame scan period of the internal control system (time delay is formed by block 26), the transition is controlled

on the outside of the wrc screen, which is a failure in both cases.

from the inputs of the first register. If this does not happen, then either the device does not respond to light radiation, tribute. As a result, the controller 50 or the light pen 1 is set up with the word input 17 through the first register 9 is transmitted to the inputs of the second 12 and first 13 flip-flops, setting them to the Zero state. At the same time, the correct operation of the trigger 12, the signal from the input 19, is applied to the control unit 28, the image input of the second register 11 is removed, the first, second and control word equal to 11111 are generated to The control word bits are written to the input device in the second register 11. In this case, the information. In this case, the triggers 12 and 13

the signal from the output of the second register 11 is fed to the input of the second element AND 14 and does not allow to receive at its output a "single signal indicating the arrival of the signal from the light pen 1

This is done in order to prevent the input device from triggering. formations from an external source of light radiation. The signal from the second output of register 11 is also fed to the input of the third element 15, prohibiting the generation of an interrupt request signal when the signal from

the formation of the interrupt request signal when the button B is pressed.

The installation of the second 12 and first 13 triggers to the zero state is then checked. For this, the computer reads data from a device with an address corresponding to this device to enter information.

as a result, the signal from the output of the decoder 10 allows you to read information from the bidirectional inputs 17

 The state of the second 12 and first 13 triggers. If even the first trigger 12 in the single information count

One of the triggers is in a single state, indicating a device failure.

In the case of normal operation of the flip-flops, block 24 is used to completely illuminate the CCG screen. After that, a control word equal to 11110 is formed, allowing the signal from the light pen 1 to pass through the second element 14 to the input of the second trigger 12. After a time equal to the frame sweep period of the wint (time delay is generated by block 26), the transition is controlled

on the outside of the wrc screen, which is a failure in both cases.

from the inputs of the first register. If this does not happen, then either the device does not respond to light emission, or light pen 1 is set behind Jri to ensure correct operation of the trigger 12 by block 28, the image is taken from the VKU screen and a control word is generated, which is 11111. to the input device. In this case, the triggers 12 and 13

are set to the initial state, and the signal from the light pen 1 is allowed to pass through the second element I 14. After one frame scan period of the DCU (delay unit 29), the second trigger 12 is checked to be in the zero state. If it has switched to a single state, then the light pero 1 responds to an external light source.

After testing the input device under the condition of its correct functioning, the computer proceeds to the input algorithm (Fig. 3).

A control word equal to 11t10 is formed (unless an interrupt request is generated when the signal from light pen 1 is received)

or 11010 (if at occurrence of a signal 20 Pz Two elements And, the output of the first

A request for an interrupt must be generated from the CE of the feather pen 1) and is sent to the information input device, as a result of which the device returns to its initial state. After that, the first light key is formed on the screen of the VCU by illuminating the key position. After the time of one period of frame scan of the control unit (delayed input of the decoder, two registers and ka is formed by block 35), 30 the third element I is checked, the inputs of the decoder

the state of the second trigger 12 by reading information from the information input device and analyzing the zero bit of data.

If the light pen 1 indicates the currently formed light button, then the light radiation from the cathode-ray tube of the internal control device falls on the photosensitive element 2, resulting in a drop resistance. Since the light pen 1 is pressed to the screen, the end contact 3 is closed, so an unbalanced bridge is formed, and the direct input of the triggers and information inputs of the differential amplifier 7 will be applied more voltage than the inverse one. Therefore, at the last output of the last positive register, respectively, the outputs of the first and second triggers are connected to the information inputs of the first register, the output of the second triggered, which will be perceived as an input, is connected to the first input of the third element of the second element 14 as 1 at its output, the Wits also have 1, that the first and second registers are

Transmission Control Input

 G that

will cause the second trigger 12 to translate into a single state.

eteva, start output light pen

If the second transfer is not connected to the installation input into the single trigger 12 into the single state (the light pen indicates another light button), then the block 37 increases the number of the generated key on

the first trigger, information outputs of the second register connects to the second inputs of the second, third, and first elements AND, respectively.

unit With the help of block 38, the current number of the generated light key does not exceed the number of keys in this information input step. If this excess occurs, it means that the light pen does not point to any light button, i.e. there is an error in entering information, about which unit 39 signals the operator. If there is no elevation, then the process of forming the next light button is repeated until the moment the generated key and light-logger 1 match.

Claims (1)

Invention Formula A device for inputting information, containing a light pen, two triggers, is connected to the first input of the first element I, the output of the second element I is connected to the input of the installation of a second trigger on the unit, about 25 liters, and with the purpose of increasing reliability by ensuring the possibility of monitoring the health of the device in it 35 are the address inputs of the device, the information output of the light pen is connected to the first input of the second element AND, the outputs of the first and third elements AND are the first and second outputs of the interrupt request of the device respectively, the output of the decoder is connected to the strobe input of the first register, information Q input inputs - whose outputs are information inputs - device outputs, information outputs of the first register are connected to the installation inputs to zero of the first, second eteva, start output light pen the first trigger, information outputs of the second register connects to the second inputs of the second, third, and first elements AND, respectively.