SU1716563A1 - Data display unit based on a segment gas matrix panel - Google Patents

Abstract

The invention relates to automation and computing and can be used in information display systems on a segmented matrix gas discharge indicator. The purpose of the invention is to increase the reliability of the device. The goal is achieved by turning off the indicator when looping by connecting the input of the multivibrator with a restart to the address input of the lower bit. In addition, the device has improved the display quality of information due to the blanking of non-significant zeros. 1 hp ff, 1 ill.

Description

The invention relates to automation and computing technology and is intended to reproduce information on discrete indicators, in particular, on segment gas discharge display panels.

The purpose of the invention is to increase the reliability of the device.

The drawing shows a block diagram of the device.

The drawing shows a segmented gas-discharge matrix indicator I, whose information inputs are connected to the output of the first block 2 keys, and the control inputs are connected to the output of the second block 3 keys, whose inputs are connected to the outputs of the decoder 4 familiarity, whose information inputs are connected to outputs of the lower bits of the first port of the parallel interface 5, multivibrator 6 with restarting, decoder 7

address, its input is connected to the part of the address bus of the microcomputer 8.

The device works as follows.

First, the programming of the parallel programmable interface (PID) 5 and the initialization of the general purpose registers (RON) of the microcomputer 8 are carried out. A control word defining its operation mode is written into the control word register of the parallel programmable interface 5. The microcomputer on the output command issues an address code to the address bus A. The two lower bits supplied to the parallel programmable interface determine the selection of the control word register. In accordance with the higher bits of the address code, a logic signal appears at the output of the address decoder 7. The input to the chip selector VM VM parallel PROCH |

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interface 5. 5. Signal signal input to the 3D interface 5, records the control word supplied from the microcomputer 8 via the data bus D. Channels A and B of the parallel programmable interface 5 are set to output: the lower four bits of channel A are used to output the familiarity code, and its fifth bit to output the gating signal of the decoder 4 familiarity. Channel B of the interface is used to output the outline code,

In the general purpose registers of the microcomputer 8 is written: the high byte of the code of the address of the RAM. where the sign and markup code is stored (graphic code), the low byte of the RAM address, where the mark is stored, the sign code displayed in the seniority, the low byte of the RAM address, where the code of the beginning of the markup table is stored (when displaying digits at this address, the code mark the number zero), the code of the older acquaintance. Then, the value of the familiarity code is verified. If the code corresponds to the least familiarity, then the drawing code, including zero, will be outputted into this familiarity. If the code of the label does not match the low-order bit of the indicator, then the address of the low byte of the address of the sign-code is determined. This is accomplished by adding the current value of the familiarity code and the address code (low byte) of the RAM, where the code of the character displayed in the higher familiarity is stored. After reading the character code (block 4, figure 2), the value of the character code is checked. If the code does not correspond to the display of the digit zero, then a drawing code will be output to this familiarity.

If the displayed digit corresponds to the zero digit, then the indication prohibition code is output to the port A of the parallel programmable interface 5 — the value of the familiarity code is added 1 to the fifth digit. At all the outputs of the decoder 4, the familiarity level is set to logical 0 and, through the second key block 3, no voltage is applied to the control inputs (anodes) of the segment gas discharge indicator 1 and information is not displayed on the indicator 1.

The duration of the presentation of logical 1 from the fifth output of the channel A of the parallel programmable interface 5 is equal to the duration of the information output time in one familiarity. The duration of the indication time can be set either by software or by hardware-npof, for example, using a timer.

The code is then set to the next familiarity and subsequent

checking the code value of the familiarity. If leading digits of indicator 1 should display zeros, then non-significant zeros are suppressed. If the information to the segment gas-discharge indicator 1 contains zeros in all familiarities, then zero is reproduced only in the junior familiarity of indicator 1.

If, when analyzing the sign code, it turns out that the displayed digit is not zero, then through

The 5th port A of the parallel programmable interface 5 displays the indication inhibit code, the value of the output of the indication inhibit code is determined by the parameters of the indicator 1 used in the fifth output of the channel A of the parallel programmable interface 5. When using the segment gas-discharge matrix indicator 1 type Needle -17 time prohibition display

5 between connecting adjacent acquaintances is 30-40 µs.

The outline code is then determined. This is accomplished by adding the character code and the address code (low byte). RAM, where

0 stores the start code of the markup table. The found value of the tracing code from the microcomputer is output to the port B of the parallel programmable interactive face 5. The trail of the trace from the output of channel B

5 parallel programmable interface 5 is fed through the first block 2 keys to the information inputs of the segmented gas-discharge matrix indicator 1. Then to the port A of the parallel programmable

0 interface 5 displays the familiarity code.

The differential 0/1 of the signal at the first output of channel A, corresponding to the low-order bit of the familiarity code, starts the waiting multivibrator b with a restart. At the inverse output of the multivibrator 6, a logic level 0 is set, which is fed to the gate input W1 of the decoder 4 familiarity. The pulse duration at the output of the multivibrator 6 with repeated

0, the launch sets a somewhat longer time duration for connecting one familiarity (with the addition of the indication prohibit time when connecting adjacent ones). therefore

In the case of a normal change of familiarity code, at the output of channel A of the parallel programmable interface 5, a logical 1 signal appears at the same output of the decoder 4 familiarity. Through the second block 3 keys to the corresponding control electrode

the segmented gas discharge matrix indicator 1 is energized. The display elements located in this selected field, in accordance with the signals from the output of the first block 2 keys, begin to shine.

The duration of the indication time can be set either programmatically or device-software using a timer. Then the next familiarity code is set and the familiarity code value is checked. If the code does not correspond to the higher order, tr is determined by the lower byte of the address code by which the sign code (block 8, Fig. 2) is stored in RAM and the sign code is read. Further, the output of the markup code is carried out in the corresponding familiarity. If the familiarity code corresponds to the older familiarity, then a transition to a new scanning cycle is made.

If there is no change of familiarity code at the output of channel A of the parallel programmable interface 5, the value of the low-order code at the first output of channel A does not change. At the same time, the multivibrator 6 does not start with a restart and its inverse output sets the logic level 1 to the input gate W1 decoder familiarity. Therefore, at all the outputs of the decoder 4 the familiar level is set to logic level O and signals are not sent to the equalizing inputs of indicator 1. Thereby, the flow of current through the indicator elements of the indicator 1 is stopped, preventing a failure

indicator 1. When changing the code, the normal display mode on the indicator 1 is restored.

Thus, the device provides 5 increase of the device reliability by opening the current flow circuit through the segmented gas discharge matrix indicator and the quality of information display is improved by extinguishing the zero zeros.

Formula and h of the shadows

Claims (2)

1. A device for displaying information on a segmented gas discharge matrix indicator containing keys 5 of the first group, the control inputs of which are the information inputs of the device, the outputs of the keys of the first group are connected to the information inputs of the indicator, the control inputs of which 0 are connected to the outputs of keys of the second group, the control inputs of which are connected to the outputs of the familiarity decoder, the information inputs of which are the address inputs of the device, the output of which is connected to the first familiarity of the decoder, multivibrator, which is different in that reliability by eliminating the quenching of the indicator during cycling, 0 the multivibrator input is connected to the low-address address input of the device. 2. The device is pop.1, from which, in order to improve the quality of the display due to the suppression of non-significant zeros, 5, the second control input of the familiarizer decoder is the control input of the device.