CS224735B1 - Programmable functional digit key strip for contact of operator with the computer - Google Patents

Description

The present invention relates to a programmable function keypad for operating a computer, in particular a microcomputer or microcomputer as an automated dispatching control system or an automated process control system.

An alphanumeric keypad is typically used to communicate between the operator and the computer control system. When communicating with the alphanumeric keypad, the operator must learn a communication language that contains syntactically precisely defined commands and responses to system queries; This complicates the computer software, increases memory requirements and reduces system throughput. This method of communication is difficult for the operator, it must know precisely the text e syntax of all commands to which the system responds. This puts a strain on her, slows her work and distracts her from her own management.

The essence of the programmable function keypad for operating a computer according to the invention is that the information input of the encoder and the output of the encoder clock pulse are connected to the computer input. Function keys are connected between encoder inputs with parallel outputs of the first shift register group. The serial and clock inputs of the first shift register group are connected to the computer output. The function key enable indicators, which are with the me224735 function keys, can be connected to the outputs of the first group of shift registers.

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I chenicky connected. The encoder clock pulse output can be connected to a computer interrupt system. A first parity generator can be connected to the encoder, the output of which is connected to the computer input. The serial inputs of the first group of shift registers can be connected to a second parity generator, the output of which is connected to the interrupt system of the computer. Serial inputs of the second shift register group can be connected to the serial outputs of the first shift register group whose clock inputs are connected to the clock inputs of the first shift register group. Indicators of important system values are then connected to the parallel outputs of the second group of shift registers.

An advantage of the programmable function keypad for communicating an operator with a computer according to the invention is that the operator sees on each function key a written function that is performed by pressing it. When he presses a button that has no emyel in a given step, nothing happens because it is electrically blocked. When using the backlight buttons, the enabled buttons may be lit at each communication step. Alternatively, the buttons selected in the previous steps may be illuminated with a different color or enhanced brightness. The buttons can be arranged clearly to make the operator's orientation quick and easy. The fact that a computer cannot receive a syntactically incorrect command simplifies the utility, reduces the steam requirement, and increases system throughput.

An example of a programmable function keypad for operating a computer according to the invention is shown in the block diagram of the accompanying drawing. An example is for connecting a keyboard to an 8-bit binary master microcomputer.

To the input of the computer 1, in this case a microcomputer, are connected the information outputs of the encoder 6, here binary, with the output 3 of the clock pulse of the encoder 2. The function keys 3 are connected between the inputs of the encoder 2 The serial and clock inputs of the first group 4 shift registers are connected to the output of computer 1. The outputs of the first group 4 shift registers are connected with the function key enable signals 3, mechanically coupled to the function keys 3. The first parity generator 6 is connected to the encoder 2, the output of which is connected to the input of the computer 1. The serial inputs of the first group 4 of the shift registers are connected to the second psrity generator 10. Its output is connected to the computer's interrupt system. Serial inputs of the second shift register group 6 are connected to the serial outputs of the first shift register group 4. Their clock inputs are connected to the clock inputs of the first group of 4 shift registers. Important system value indicators Jg are connected to the parallel outputs of the second group 8 shift registers.

All inputs of encoder 2 are at logical level. In the first group 4 of the shift registers, the computer 1 stores, by means of its serial or parallel output, the corresponding enable of the function keys 3 in the default configuration of the computer control system when the logic level power is switched on. The function keys 3 »which are connected to the outputs of the first group 4 of the shift registers, which at this point is logically zero, are enabled and are lit, for example, green. Others are not allowed. By pressing the function key 3 »which is enabled, the logic zero level comes to the corresponding input of encoder 2. Not its outputs

3β discovers the function key 2 code in 88 dmi bits and the first parity generator 6 adds the eighth bit to the odd parity. At the same time, the output of the clock pulse of the encoder 2 generates an interrupt pulse. The computer 1 reads the function key J code through its serial or parallel input and checks for parity. If the parity is correct, the computer 1 executes the selected function and stores information about the state of the controlled system e in both new groups A and 8 shift registers in this new state. In the event of a parity error at the output, the second parity generator 10 generates an interrupt pulse and the computer 1 repeats storing the information in both groups A and 8 shift registers.

Claims (6)

A programmable function keypad for operating a computer, characterized in that the information outputs of the encoder (2) and the clock pulse output (5) of the encoder (2) are connected to the computer input (1), the function buttons (3) being connected. between encoder inputs (2) and parallel outputs of the first shift register group (4) when both the serial and clock inputs of the first shift register group (4) are connected to the computer output (1). 2. A programmable function keypad according to claim 1, characterized in that the outputs of the first shift register group (4) are connected with indicator lights (7) for enabling the function keys (3), which are mechanically connected to the function keys (3). A programmable function keypad according to claim 1, characterized in that the clock pulse output (5) of the encoder (2) is connected to the interrupt system of the computer (1). 4. The programmable function keypad of claim 1, wherein a first parity generator (6) is connected to the encoder (2), the output of which is connected to the input of the computer (1). The programmable function keypad of claim 1, wherein the serial inputs of the first shift register group (4) are connected to a second parity generator (10), the output of which is connected to the interrupt system of the computer (1). The programmable function keypad of claim 1, wherein the serial outputs of the first shift register group (4) are connected to the serial inputs of the second shift register group (8), the clock inputs of which are connected to the clock inputs of the first shift register group (4). The important values of the system values are connected to the parallel outputs of the second group of shift registers.