CN205751468U - A kind of charactron dynamic scanning displaying cascaded circuit - Google Patents

Abstract

A kind of charactron dynamic scanning displaying cascaded circuit, including single-chip microcomputer and at least one driver element, each driver element includes that one seals in and go out circuit and multiple charactron dynamic driver circuit, the two of which I/O port of single-chip microcomputer connects clock port and the FPDP sealing in and going out circuit in each driver element respectively, the other three I/O port of single-chip microcomputer connects the shift clock port of each charactron dynamic driving control circuit respectively, latch clock port and serial data port, adjacent driven unit connects by sealing in and going out circuit, sealing in and going out the parallel data output port of circuit selects port to be connected with the sheet of the charactron dynamic driver circuit in respective drive unit, each charactron dynamic driver circuit is all connected with one group of charactron.This utility model realizes a large amount of digital dynamic scan by five I/O ports and drives display, and simple in construction, it is few that CPU takies resource, and cost is relatively low.

Description

A kind of charactron dynamic scanning displaying cascaded circuit

Technical field

This utility model relates to a kind of dynamic scanning displaying cascaded circuit showing charactron in driving field, especially It it is the dynamic scanning displaying cascaded circuit of a large amount of charactron.

Background technology

Charactron normally to show it is necessary to drive each segment encode of charactron with drive circuit, thus demonstrates us The numeral wanted.The difference of the type of drive according to charactron, can be divided into static drive and dynamic scan to drive two classes.Dynamically sweep Retouching driving is to be connected together by the Same Name of Ends of eight displays stroke " a, b, c, d, e, f, g, dp " of all charactrons, is additionally every The public pole COM of individual charactron increases position gate control circuit, and position gates by the most independent I/O line traffic control, when single-chip microcomputer is defeated When going out graphemic code, all charactrons all receive identical graphemic code, but are that charactron will reveal whether font actually, depend on In the control of single-chip microcomputer para-position gating COM terminal circuit, as long as so the gating needing the charactron of display is controlled to open by we, This position just demonstrates font, and the charactron not having gating would not be bright.By the COM end of timesharing wheel each charactron of flow control, Just make the most controlled display of each charactron, here it is dynamic scan drives.The effect of Dynamic Announce is the same with static state display , it is possible to save substantial amounts of I/O port, and power consumption is lower.

Existing conventional SCM Based dynamic scanning drive method is to use a piece of seal in and go out chip as Duan Xuan, Another sheet seals in and goes out chip and selects as position, and single-chip microcomputer scan round shows, the method takies cpu resource the most in a large number, and Be not suitable for being applied to cascade in a large number display.It is master control borad+driving plate+extension that another kind realizes the method for dynamic scan cascaded Plate mode, the method shortcoming is that control program is complicated, and I/O demand is big, drives line between plate more, line and maintenance inconvenience.

Summary of the invention

Main purpose of the present utility model is to provide a kind of charactron dynamic scanning displaying cascaded circuit, overcomes existing The problem that technology exists, takies resource reducing CPU, reduces production cost.

The technical solution adopted in the utility model is a kind of charactron dynamic scanning displaying cascaded circuit, including monolithic Machine and at least one driver element, each driver element includes that one seals in and go out circuit and multiple charactron dynamic driving electricity Road, the two of which I/O port of single-chip microcomputer connects clock port and the data sealing in and going out circuit in each driver element respectively Port, the other three I/O port of single-chip microcomputer connect respectively each charactron dynamic driving control circuit shift clock port, Latch clock port and serial data port, adjacent driven unit connects by sealing in and going out circuit, seals in and go out circuit also Row data-out port selects port to be connected with the sheet of the charactron dynamic driver circuit in respective drive unit, and each charactron moves State drive circuit is all connected with one group of charactron.

Wherein said charactron dynamic driver circuit has eight, seals in and goes out eight parallel data output ports of circuit and divides The sheet of eight charactron dynamic driver circuits port, each charactron dynamic driver circuit Lian Jie not selected to connect a group octet respectively The charactron of eight sections, the position of charactron dynamic driver circuit selects port to connect eight of charactron, charactron dynamic driving respectively The section of circuit selects port to connect eight sections of bits per inch code pipe respectively.

Compared with prior art, advantage of the present utility model and providing the benefit that: realize a large amount of number by five I/O ports Code dynamic scan drives display, and simple in construction, it is few that CPU takies resource, and cost is relatively low, practical, it is simple to promotes the use of.

Accompanying drawing explanation

Fig. 1 is the schematic diagram of this utility model one embodiment；

Fig. 2 is the structured flowchart of this utility model one embodiment；

Fig. 3 is the minimum system figure of single-chip microcomputer in this utility model one embodiment；

Fig. 4 is the peripheral circuit diagram sealing in and going out circuit in this utility model one embodiment；

Fig. 5 is the peripheral circuit diagram of charactron dynamic driver circuit in this utility model one embodiment.

Detailed description of the invention

With embodiment, this utility model is further illustrated below in conjunction with the accompanying drawings.

Embodiment one

The charactron dynamic scanning displaying cascaded circuit of the present embodiment includes single-chip microcomputer and four driver elements, each Driver element includes that one seals in and go out circuit and eight charactron dynamic driver circuits, and each Nixie tube drive circuit connects respectively Connect the charactron of a group octet eight sections.Wherein, chip AT89C52 selected by single-chip microcomputer, seals in and goes out circuit and selects chip 74HC595, charactron dynamic driver circuit selects chip TM1638.Single-chip computer AT89C52 minimum system figure is as shown in Figure 3. 74HC595 is a to have sealing in and going out chip of eight bit shift register, a memorizer and ternary output function.Inside it Shift register and memorizer have separate clock, peripheral circuit diagram is as shown in Figure 4.TM1638 is that band keyboard scan connects The charactron dynamic driving of mouth controls special chip, and display pattern is ten sections × eight, has been internally integrated MCU digital interface, number According to functions such as latch, LED high drive, keyboard scans, its peripheral circuit diagram is as shown in Figure 5.

Fig. 1 is the schematic diagram of this utility model one embodiment, and Fig. 2 is the structured flowchart of this utility model one embodiment.Ginseng Examining Fig. 1 and Fig. 2, the concrete principle of the present embodiment is as follows, and five I/O of single-chip microcomputer, as output, are respectively intended to control chip The shift clock (SHCP) of the clock (CLK) of TM1638, data (DATA) and chip 74HC595, latch clock (STCP) and Serial data (DS).Export sheet choosing (CS) of control chip TM1638 by the parallel data of chip 74HC595, pass through chip The pin Q7 of 74HC595 ~ realization cascade, eight parallel data output ports of 74HC595 connect the sheet of eight TM1638 respectively Select port, the serially concatenated of chip 74HC595 can realize the timesharing sheet selected control system of a large amount of TM1638.By timesharing sheet selected control system Data timesharing is sent in TM1638 chip, and then makes TM1638 that numeral method is operated alone, do not interfere with each other, now single-chip microcomputer It is placed in low-power consumption standby pattern.

One plant produced line information display system include real-time clock, button, single-chip microcomputer, charactron dynamic driver circuit and Host computer.Display charactron totally 216, production management's billboard shows current time, scheduling number of units, beat minute, cabling Number of times, difference minute, the number of units that rolls off the production line, difference number of units, plan cabling time and actual cabling time.The system planning cabling time and Actual cabling time showing select be common cathode clock charactron, according to charactron quantity select 4 74HC595,27 TM1638.Host computer by 485 bus transmissioning datas to single-chip microcomputer, single-chip microcomputer sent by I/O pin P1.0 ~ P1.4 instruct and Data are placed on low-power consumption mode to 74HC595 and TM1638, and TM1638 drives charactron to show.

Claims (2)

1. a charactron dynamic scanning displaying cascaded circuit, it is characterised in that include single-chip microcomputer and at least one driving Unit, each driver element includes that one seals in and go out circuit and multiple charactron dynamic driver circuit, wherein the two of single-chip microcomputer Individual I/O port connects clock port and the FPDP sealing in and going out circuit in each driver element respectively, and single-chip microcomputer is additionally Three I/O ports connect shift clock port, latch clock port and the string of each charactron dynamic driving control circuit respectively Row FPDP, adjacent driven unit connects by sealing in and going out circuit, seal in and go out the parallel data output port of circuit with The sheet of the charactron dynamic driver circuit in respective drive unit selects port to connect, and each charactron dynamic driver circuit is all connected with One group of charactron.

A kind of charactron dynamic scanning displaying cascaded circuit the most according to claim 1, it is characterised in that Qi Zhongsuo State charactron dynamic driver circuit and have eight, seal in and go out eight parallel data output ports of circuit and connect eight numbers respectively The sheet of pipe dynamic driver circuit selects port, each charactron dynamic driver circuit to connect the charactron of a group octet eight sections respectively, The position of charactron dynamic driver circuit selects port to connect eight of charactron respectively, and the section of charactron dynamic driver circuit selects port Connect eight sections of bits per inch code pipe respectively.