CN205485338U

CN205485338U - Intelligence electronic stopwatch

Info

Publication number: CN205485338U
Application number: CN201620075660.0U
Authority: CN
Inventors: 范子荣
Original assignee: Shanxi Datong University
Current assignee: Shanxi Datong University
Priority date: 2016-01-26
Filing date: 2016-01-26
Publication date: 2016-08-17
Anticipated expiration: 2026-01-26

Abstract

The application discloses intelligence electronic stopwatch, simple, control flexibility, dependable performance are connected to it, the interference killing feature is strong, the cost is lower, control is accurate, long service life. It includes control module, reset circuit, crystal oscillator circuit, the stopwatch display circuit, keying circuit, control module is the singlechip, crystal oscillator circuit is connected to the clock circuit - terminating of singlechip, reset circuit is connected to the reset terminal of singlechip, the stopwatch shows the output of circuit connection to the singlechip, keying circuit is connected to the input of singlechip, button through keying circuit is controlled intelligence electronic stopwatch as the external interrupt source, interrupt signal arrives for the first time, intelligence electronic stopwatch begins the timing, interrupt signal arrives for the second time, intelligence electronic stopwatch stops the timing, interrupt signal arrives for the third time, intelligence electronic stopwatch shows the zero clearing.

Description

A kind of smart electronics stopwatch

Technical field

This utility model belongs to the technical field of controller, more particularly to a kind of smart electronics stopwatch.

Background technology

Electronic stopclock in the market is the most ripe, but most of electronic stopclock is adopted With traditional mimic bus or simple digit chip, its intelligence degree is not high enough in the controlling, and surely Qualitative the best, the change of control model is the most comparatively laborious.

Summary of the invention

The technical problems to be solved in the utility model is to provide a kind of smart electronics stopwatch, its connect simple, Control is flexibly, dependable performance, capacity of resisting disturbance are strong, cost is relatively low, control is accurate, service life is long.

The technical scheme solving the problems referred to above is: this smart electronics stopwatch, and it includes control module, answers Position circuit, crystal oscillating circuit, stopwatch display circuit, key circuit, control module is single-chip microcomputer, crystal oscillator electricity Road is connected to the clock circuit end of single-chip microcomputer, and reset circuit is connected to the reset terminal of single-chip microcomputer, and stopwatch shows Circuit is connected to the outfan of single-chip microcomputer, and key circuit is connected to the input of single-chip microcomputer, by button electricity Smart electronics stopwatch is controlled by the button on road as exterior interrupt, and interrupt signal arrives for the first time, Smart electronics stopwatch starts timing, and interrupt signal arrives for the second time, and smart electronics stopwatch stops timing, the Three times interrupt signal arrives, and the display of smart electronics stopwatch resets.

Owing to smart electronics stopwatch of the present utility model have employed single-chip microcomputer, crystal oscillating circuit is connected to single-chip microcomputer Clock circuit end, reset circuit is connected to the reset terminal of single-chip microcomputer, and stopwatch display circuit is connected to monolithic The outfan of machine, key circuit is connected to the input of single-chip microcomputer, by the button of key circuit as outward Smart electronics stopwatch is controlled by portion's interrupt source, and interrupt signal arrives for the first time, and smart electronics stopwatch is opened Beginning timing, interrupt signal arrives for the second time, and smart electronics stopwatch stops timing, and interrupt signal arrives for the third time Coming, the display of smart electronics stopwatch resets, thus connect simple, control flexibly, dependable performance, anti-interference Ability is strong, cost is relatively low, control is accurate, service life is long.

Accompanying drawing explanation

Fig. 1 is the circuit block diagram according to a kind of preferred smart electronics stopwatch of the present utility model.

Fig. 2 is the schematic diagram according to AT89C55 single-chip microcomputer of the present utility model.

Fig. 3 is according to crystal oscillating circuit figure of the present utility model.

Fig. 4 is the circuit diagram according to reset unit of the present utility model.

Fig. 5 is the circuit diagram according to stopwatch display circuit of the present utility model.

Fig. 6 is the circuit diagram according to key circuit of the present utility model.

Detailed description of the invention

As it is shown in figure 1, this smart electronics stopwatch, it includes control module, reset circuit, crystal oscillator electricity Road, stopwatch display circuit, key circuit, control module is single-chip microcomputer, and crystal oscillating circuit is connected to single-chip microcomputer Clock circuit end, reset circuit is connected to the reset terminal of single-chip microcomputer, and stopwatch display circuit is connected to monolithic The outfan of machine, key circuit is connected to the input of single-chip microcomputer, by the button of key circuit as outward Smart electronics stopwatch is controlled by portion's interrupt source, and interrupt signal arrives for the first time, and smart electronics stopwatch is opened Beginning timing, interrupt signal arrives for the second time, and smart electronics stopwatch stops timing, and interrupt signal arrives for the third time Coming, the display of smart electronics stopwatch resets.

Preferably, as in figure 2 it is shown, described single-chip microcomputer is model is the single-chip microcomputer of AT89C55.

AT89C55 is the low-voltage of American ATMEL production, 8 single-chip microcomputers of high-performance CMOS, and sheet includes Have 20k byte can be the most erasable Flash read-only program memory and the random access memory of 256*8 byte Data storage, device uses high density, nonvolatile storage technologies to produce, and device has three grades of encryption journeys Sequence memorizer, 32 I/O mouth lines able to programme, two 16 bit timings/enumerators, 8 interrupt sources, tool There are low power idle and power-down mode.

It has four mouths, respectively:

P0 mouth: P0 mouth is 8 two-way I/O mouths.

P1 mouth: P1 mouth is internal 8 the two-way I/O mouths providing pull-up resistor.

P2 mouth: P2 mouth is 8 two-way I/O mouths of an internal pull-up resistor.

P3 mouth: P3 mouth pin is the two-way I/O mouth of 8 band internal pull-up resistor.

P3 mouth also can be as follows as some specific function mouths of AT89C55:

P3.0RXD (serial input mouth)

P3.1TXD (Serial output mouth)

P3.2/INT0 (external interrupt 0)

P3.3/INT1 (external interrupt 1)

P3.4T0 (the outside input of timer 0)

P3.5T1 (the outside input of timer 1)

P3.6/WR (external data memory write gate)

P3.7/RD (external data memory read gate)

RST: reset input.

The input port of XTAL1: crystal oscillating circuit.

The delivery outlet of XTAL2: crystal oscillating circuit.

Preferably, as it is shown in figure 5, described stopwatch display circuit includes ten bps LED charactrons and a bps LED charactron, individual bps LED charactron connects the P0 mouth of single-chip microcomputer, and ten bps LED charactrons connect single-chip microcomputer P1 mouth.

Preferably, as shown in Figure 4, described reset circuit includes a button in parallel and an electric capacity, A termination power in parallel and other end ground connection.

Preferably, as shown in Figure 2,3, the crystal oscillator frequency of described crystal oscillating circuit is 11MHz.

Preferably, as shown in Figure 2,6, described key circuit include series connection a button and an electricity Resistance, one end ground connection of button and the other end meet the port P3.7 of single-chip microcomputer, a termination button of resistance and Another termination power.

Preferably, the moment stopwatch display circuit that switches on power is set to show 00.

The application is described in further detail below.

During work, using 2 LED numeral method second, display format is ten bps, individual bps. P0 mouth connects the individual position of stopwatch display, and P1 mouth meets ten of stopwatch display.

Key circuit is controlled by P3.7 pin, controls electronic stopclock as exterior interrupt with button System, interrupts arriving for the first time, and electronic stopclock starts timing, when interrupt signal arrives for the second time, and the electronics second Table stops timing, and when third time interrupts arriving, electronic stopclock display resets.Simultaneously, it is desirable to switch on power Moment stopwatch shows 00.

In Fig. 2, the P0 mouth of single chip computer AT 89C55 controls the individual position of stopwatch display, and P1 mouth controls stopwatch and shows Ten of device, key circuit is connected to P3.7 pin, as the interrupt signal of external interrupt 1, in a program Use interrupt processing.RST connects reset circuit, and XTAL1, XTAL2 connect crystal oscillating circuit.

Fig. 3 is crystal oscillating circuit, and Fig. 4 is reset circuit, presses the button S1 and resets.

Fig. 5 is stopwatch display circuit, receives P0 and P1 mouth.

Fig. 6 is key circuit, and pressing the button S explanation has interruption to produce, and by once, represents and starts, press Secondary, represents and stops, and by three times, represents and resets.

This novel SCM Based smart electronics stopwatch controller uses single chip computer AT 89C55 to coordinate Other electron component forms, and controls flexible, dependable performance, not only has stronger anti-interference, simultaneously Control is accurate, service life is long.

The above, be only preferred embodiment of the present utility model, and this utility model is not made any shape Restriction in formula, every according to technical spirit of the present utility model above example is made any simply Amendment, equivalent variations and modification, the most still belong to the protection domain of technical solutions of the utility model.

Claims

1. a smart electronics stopwatch, it is characterised in that: it includes control module, reset circuit, crystal oscillator Circuit, stopwatch display circuit, key circuit, control module is single-chip microcomputer, and crystal oscillating circuit connects To the clock circuit end of single-chip microcomputer, reset circuit is connected to the reset terminal of single-chip microcomputer, and stopwatch shows Circuit is connected to the outfan of single-chip microcomputer, and key circuit is connected to the input of single-chip microcomputer, passes through Smart electronics stopwatch is controlled by the button of key circuit as exterior interrupt, in first time Break signal arrives, and smart electronics stopwatch starts timing, and interrupt signal arrives for the second time, Intelligent electric Sub-stopwatch stops timing, and interrupt signal arrives for the third time, and the display of smart electronics stopwatch resets.

Smart electronics stopwatch the most according to claim 1, it is characterised in that: described single-chip microcomputer is model Single-chip microcomputer for AT89C55.

Smart electronics stopwatch the most according to claim 2, it is characterised in that: described stopwatch display circuit Including ten bps LED charactrons and a bps LED charactron, individual bps LED charactron connects single-chip microcomputer P0 mouth, ten bps LED charactrons connect the P1 mouth of single-chip microcomputer.

Smart electronics stopwatch the most according to claim 2, it is characterised in that: described reset circuit includes A button in parallel and an electric capacity, a termination power in parallel and other end ground connection.

Smart electronics stopwatch the most according to claim 2, it is characterised in that: the crystalline substance of described crystal oscillating circuit Vibration frequency is 11MHz.

Smart electronics stopwatch the most according to claim 2, it is characterised in that: described key circuit includes One button of series connection and a resistance, one end ground connection of button and the other end connect the end of single-chip microcomputer Mouth P3.7, termination button and another termination power of resistance.

Smart electronics stopwatch the most according to claim 3, it is characterised in that: switch on power moment stopwatch Display circuit is set to show 00.