SU1631547A1 - Device providing interface between computer and external device - Google Patents

Abstract

The invention relates to computing and automation and can be used to automate the collection, presentation and transmission of information to computers during scientific research or a physical experiment, to control and monitor technological processes. The aim of the invention is to increase speed. The device contains a register, an OR element, two triggers, a one-shot, an AND element, an amplifier. 1 silt

Description

The invention relates to computing and automation and is intended to automate the collection, presentation and transmission of information in scientific research, for example, to computers from external devices, digital measuring instruments, digital output keyboards and can be used to monitor and control technological processes.

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

The drawing shows the functional diagram of the device.

The device contains .register 1, input 2, output 3, input 4, amplifier 5, output 6, input 7, element 8, trigger 9, output 10, device input 11, element OR 12 inputs 13-15, trigger 16, one-shot 17 and exit 18.

The device works as follows.

When the power is turned on, a pulse arrives at the device input 11, which through the OR element 12 sets the register 1, the first 16 and the second 9 triggers to the initial (zero) state. The device is also reset to the initial state by a general reset signal from the computer, which is fed to the input 13 of the device and, accordingly, to the input of the element OR 12. As a result, O is installed on the outputs 3, JO and 18 of the device.

In order to communicate with a computer, an external device (digital measuring device, keyboard with digital output) generates a signal at the input 4 of the device and, accordingly, at the input of the amplifier 5. At the output of the latter, a signal of a given power and polarity is generated, which allows operation at the register 1 and the input element And 8, and also enters the output 6 of the device and then into the computer, informing that the external deviceSP

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A digital instrument, a keyboard with a digital output is electrically connected and ready to provide information. Otherwise, i.e. the absence of a signal at the output 6 of the device leads to blocking the operation of the register 1, element 8 and further trigger 9 and, respectively, to the absence of signals in the computer at the outputs 3 and 10 of the device, and this indicates the unavailability of the external device of the digital measuring device, the keyboard with the digital output transmit information, to which the computer produces a diagnostic message.

When a software request to enter information at the device input 14 from a computer, a request signal is received for entering information into a computer. This signal translates the first trigger 16 into a single state. From the last output, the signal is fed to the input of the second trigger 9 allowing its operation and to the input of the one-oscillator 17, which on its leading edge of the signal generates at its output and, accordingly, at the output 18 of the device, a signal of a given polarity and duration into an external device (digital measuring device, keyboard with digital output) to issue information. The latter, in response to this request, sends to the input 2 of the device and, respectively, to the input of the register 1, information in the parallel code, and to the input 7 of the device a clock pulse. The latter arrives at the input of the element 8 and generates at its output a pulse that enters the input of the register 1. This pulse records information into the register 1. As a result, the output of the register 1 and, accordingly, the output 3 of the device exhibits information in a parallel code. At the same time, the second trigger 9 is cocked by the same pulse from the output of the And 8 element. As a result, a signal is generated at its output and, accordingly, at the output 10 of the device informing the computer that information is output at the output 3 of the device. The computer, having received the information from the output 3 of the device in its buffer register and the signal from the output 10 of the device, generates a signal that the information is received at the input 15 of the device, which resets the first trigger 16. Resetting the latter causes the second trigger 9 to reset,

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leads to the removal of the signal at the output 10 of the device. Only after this signal is removed, the computer device can generate a request signal for entering information at the device input 14, which ensures reliable reception of information into the computer buffer register. The information transfer process continues until all the information has been transmitted. After the transfer of all information has been completed, the device is in the initial state.

Claims (1)

Invention Formula A device for interfacing a computer with an external device, containing a register, a first trigger, a single-vibration device, an OR element, and the information input and output of a trigger are inputs of a device for connecting respectively an information output of an external device and an information input of a computer. the new vibrator is connected to the input request of an external device, and the output of the OR element is connected to the register setup inputs, characterized in that, in order to improve speed, a second trigger is inserted into the device, amplify And the element And, the information input of the amplifier is the input of the device for connecting to the output of the external device, the output of the amplifier is connected to the enable input of the register, with the first input of the element I and is the output of the device for connecting to the input of the computer is the input of the device for connecting to the synchronization output of the external device, the first input of the OR element, the single input and the first zero input of the first trigger are the inputs of the device for connecting the corresponding But to the setup input, to the request output and to the gate output of the computer, the output of the second trigger is the output of the device for connection to the gate input of the computer, the second input of the OR element is the installation input of the device, and the register entry input a single input of the second trigger, the first zero input of which is connected to the output of the OR element and to the second zero input of the first trigger, the output of which is connected to the trigger start input of single-P. Rotor and with the second input of the second trigger.