CN204029239U - There is the singlechip experimental box of circuit state visualization function - Google Patents
There is the singlechip experimental box of circuit state visualization function Download PDFInfo
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- CN204029239U CN204029239U CN201420422593.6U CN201420422593U CN204029239U CN 204029239 U CN204029239 U CN 204029239U CN 201420422593 U CN201420422593 U CN 201420422593U CN 204029239 U CN204029239 U CN 204029239U
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Abstract
The utility model provides a kind of singlechip experimental box with circuit state visualization function, described switch input circuit is connected with on off state display circuit, described external clock source circuit is connected with clock status display circuit, described external interrupt request circuit is connected with interrupt request status display circuit, described matrix keyboard circuit is connected with key-press status display circuit, described relay circuit is connected with relay status display circuit, this singlechip experimental box with circuit state visualization function is at switch input circuit, the experimental circuit that the various single-chip microcomputer such as external clock source circuit needs has incorporated display circuit, make these circuit modules operationally can reflect their duty intuitively, once experimental result goes wrong, the signal that just can be provided by display circuit judges that hardware or software result in the appearance of problem, be convenient to user judge experimental program as soon as possible and adjust.
Description
Technical field
The utility model relates to technical field of electronic equipment, particularly relates to a kind of singlechip experimental box with circuit state visualization function, is applied to the experimental teaching to student's single-chip microcomputer.
Background technology
Single-chip microcomputer is a kind of integrated circuit (IC) chip, and it adopts very large scale integration technology to be integrated into the little and perfect microcomputer system of that one piece of silicon chip is formed having the central processing unit of data-handling capacity, random access memory, ROM (read-only memory), multiple I/O mouth and the function such as interrupt system, timer/counter (may also comprise the circuit such as display driver circuit, pulse-width modulation circuit, analog multiplexer, A/D converter).Single-chip microcomputer is with series of advantages such as its high reliability, high performance-price ratio, low-voltage, low-power consumption, obtained fast development in recent years and promoted on a large scale, be widely used in industrial control system, data acquisition system (DAS), intelligent instrumentation, and communication apparatus, current consumption series products, toy etc.And be deep in each level of industrial links and people's lives, as workshop Pipeline control, automated system etc., intelligent home electrical appliance (refrigerator, air-conditioning, colour TV) etc., invariably containing cpu controller, i.e. single-chip microcomputer.In order to student can be allowed better to grasp single-chip microcomputer knowledge, coordinate the needs of school's single chip computer teaching, counted out a kind of singlechip experimental box.
Various singlechip experimental box is of a great variety on the market now, general circuit is all take single-chip microcomputer as core, input, output low and high level are directly inputted to port, circuit reacts the result of execution by exporting, the shortcoming of this circuit is: student cannot get information about the real state of port, when student experimenting, circuit connection is if there is problem, can not draw correct result, student just cannot judge hardware problem or software programming problem, affects the carrying out of teaching and experiment.
Utility model content
The technical problems to be solved in the utility model is: cannot show intuitively for the duty of hardware to solve existing singlechip experimental box, when experimental result is incorrect, user cannot judge that hardware causes or software issue, and the utility model provides a kind of singlechip experimental box with circuit state visualization function and solves the problems referred to above.
The utility model solves the technical scheme that its technical matters adopts: a kind of singlechip experimental box with circuit state visualization function, comprise single-chip microcomputer, switch input circuit, external clock source circuit, external interrupt request circuit, LED display circuit, matrix keyboard circuit and relay circuit, described switch input circuit is connected with the P1 interface of described single-chip microcomputer, external clock source circuit is connected with the T0 interface of described single-chip microcomputer, INT0 interface and the INT1 interface of described external interrupt request circuit and described single-chip microcomputer are connected, described LED display circuit is connected with the P0 interface of described single-chip microcomputer, described matrix keyboard circuit is connected with the P2 interface of described single-chip microcomputer, described relay circuit is connected with the WR interface of described single-chip microcomputer, described switch input circuit is connected with on off state display circuit, described external clock source circuit is connected with clock status display circuit, described external interrupt request circuit is connected with interrupt request status display circuit, described matrix keyboard circuit is connected with key-press status display circuit, described relay circuit is connected with relay status display circuit.
Concrete, described switch input circuit comprises eight switches, described on off state display circuit comprises light emitting diode D10 ~ D17, one end ground connection of described eight switches, in addition one end be connected with the negative electrode of described light emitting diode D10 ~ D17 respectively, and be connected with P1.0 ~ P1.7 interface of described single-chip microcomputer, be in series with first current-limiting resistance between the anode of described light emitting diode D10 ~ D17 and+5V power supply respectively.
Concrete, described switch input circuit comprises eight key switch U11, and described eight key switch U11 comprise described eight switches.
Concrete, described external clock source circuit comprises the timing integrated circuit U2 that model is NE555, model is the Sheffer stroke gate U9A of 7400, single-pole double-throw switch (SPDT) SW_CLK, the output terminal of described timing integrated circuit U2 is connected with an input end of described Sheffer stroke gate U9A, the moved end of single-pole double-throw switch (SPDT) SW_CLK described in the another one input termination of described Sheffer stroke gate U9A, two of the moved end of described single-pole double-throw switch (SPDT) SW_CLK not moved end ground connection and+5V power supplys respectively, the output terminal of described Sheffer stroke gate U9A is connected with the T0 interface of described single-chip microcomputer, described clock status display circuit comprises the impact damper U8A that model is 7407, light emitting diode D_CLK and resistance R4, the input end of described impact damper U8A is connected with the output terminal of described Sheffer stroke gate U9A, the output terminal of described impact damper U8A is connected with described negative electrode of giving out light diode D_CLK, the anode of the described diode D_CLK that gives out light connects+5V power supply after connecting with described resistance R4.
Concrete, described external interrupt request circuit comprises the timing integrated circuit U3 and timing integrated circuit U4 that model is NE555, model is Sheffer stroke gate U9B and the Sheffer stroke gate U9C and button S_INT0 and button S_INT1 of 7400, one end ground connection of described button S_INT0, the trigger end of timing integrated circuit U3 described in an other termination, the output terminal of described timing integrated circuit U3 is connected with two input ends of described Sheffer stroke gate U9B, the output terminal of described Sheffer stroke gate U9B is connected with the INT0 interface of described single-chip microcomputer, one end ground connection of described button S_INT1, the trigger end of timing integrated circuit U4 described in an other termination, the output terminal of described timing integrated circuit U4 is connected with two input ends of described Sheffer stroke gate U9C, the output terminal of described Sheffer stroke gate U9C is connected with the INT1 interface of described single-chip microcomputer, described interrupt request status display circuit comprises impact damper U8B and the impact damper U8C that model is 7407, light emitting diode D_PLUS1, light emitting diode D_PLUS2, resistance R6 and resistance R8, the input end of described impact damper U8B is connected with the output terminal of described Sheffer stroke gate U9B, the output terminal of described impact damper U8B is connected with described negative electrode of giving out light diode D_PLUS1, the anode of the described diode D_PLUS1 that gives out light connects+5V power supply after connecting with described resistance R6, the input end of described impact damper U8C is connected with the output terminal of described Sheffer stroke gate U9C, the output terminal of described impact damper U8C is connected with described negative electrode of giving out light diode D_PLUS2, the anode of the described diode D_PLUS2 that gives out light connects+5V power supply after connecting with described resistance R8.
Concrete, described LED display circuit comprises light emitting diode L1 ~ L8, model is the group of four figures pipe LED1 of 3641AH, model is 3611AG and charactron LED2, the negative electrode of described light emitting diode L1 ~ L8, eight sections of group of four figures pipe LED1 select eight sections choosing ends of end and charactron LED2 to be connected and a model of connecting respectively is be connected with the P0 interface of described single-chip microcomputer after the impact damper of 7407, four position choosings of described group of four figures pipe LED1 hold a model of connecting respectively to be connected with P2.4 ~ P2.7 interface of described single-chip microcomputer after the impact damper of 7407, second current-limiting resistance is in series with respectively between the anode of described light emitting diode L1 ~ L8 and+5V power supply.
Concrete, described matrix keyboard circuit comprises button S204 ~ S207, button S214 ~ S217, button S224 ~ S227, button S234 ~ S237 and button K20 ~ K27, be connected with the P2.0 interface of described single-chip microcomputer after one end of described button S204 ~ S207 is connected, one end is connected with P2.4 ~ P2.7 interface of described single-chip microcomputer respectively in addition, be connected with the P2.1 interface of described single-chip microcomputer after one end of described button S214 ~ S217 is connected, one end is connected with P2.4 ~ P2.7 interface of described single-chip microcomputer respectively in addition, be connected with the P2.2 interface of described single-chip microcomputer after one end of described button S224 ~ S227 is connected, one end is connected with P2.4 ~ P2.7 interface of described single-chip microcomputer respectively in addition, be connected with the P2.3 interface of described single-chip microcomputer after one end of described button S234 ~ S237 is connected, one end is connected with P2.4 ~ P2.7 interface of described single-chip microcomputer respectively in addition, one end of described button K20 ~ K27 is connected with P2.0 ~ P2.7 interface of described single-chip microcomputer respectively, one end ground connection in addition, described key-press status display circuit comprises light emitting diode D20 ~ D27, the negative electrode of described light emitting diode D20 ~ D27 is connected with P2.0 ~ P2.7 interface of described single-chip microcomputer respectively, the 3rd current-limiting resistance is in series with respectively between anode and described+5V power supply.
Concrete, described relay circuit comprises single-pole double-throw relay, triode Q2 and resistance R21, one termination+5V power supply of the solenoid of described single-pole double-throw relay, one end is connected with the collector of described triode Q2 in addition, between the base stage that described resistance R21 is connected on described triode Q2 and the WR interface of described single-chip microcomputer, the grounded emitter of described triode Q2, described relay status display circuit comprises light emitting diode D1 and resistance R22, the anode of described light emitting diode D1 connects+5V power supply after connecting with described resistance R22, negative electrode is connected with the collector of described triode Q2.
Concrete, also comprise buzzer circuit, described buzzer circuit comprises loudspeaker SP1, resistance R18, triode Q1 and resistance R19, one end of described loudspeaker SP1 connects+5V power supply after connecting with described resistance R18, one end is connected with the emitter of described triode Q1 in addition, the base stage of described triode Q1 is connected on the RD interface of described single-chip microcomputer after connecting with described resistance R19, grounded collector.
The beneficial effects of the utility model are, this singlechip experimental box with circuit state visualization function has incorporated display circuit in the experimental circuit of the various single-chip microcomputer needs such as switch input circuit, external clock source circuit, make these circuit modules operationally can reflect their duty intuitively, once experimental result goes wrong, the signal that just can be provided by display circuit judges that hardware or software result in the appearance of problem, is convenient to user and judges experimental program as soon as possible and adjust.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is further illustrated.
Fig. 1 is the structural framing schematic diagram that the utility model has the optimum embodiment of singlechip experimental box of circuit state visualization function.
Fig. 2 is the circuit distribution schematic diagram of switch input circuit and on off state display circuit.
Fig. 3 is the circuit distribution schematic diagram of external clock source circuit and clock status display circuit.
Fig. 4 is the circuit distribution schematic diagram of external interrupt request circuit and interrupt request status display circuit.
Fig. 5 is the circuit distribution schematic diagram of LED display circuit.
Fig. 6 is the circuit distribution schematic diagram of matrix keyboard circuit and on off state display circuit.
Fig. 7 is the circuit distribution schematic diagram of relay circuit, relay status display circuit and buzzer circuit.
Embodiment
By reference to the accompanying drawings the utility model is described in further detail now.These accompanying drawings are the schematic diagram of simplification, only basic structure of the present utility model are described in a schematic way, and therefore it only shows the formation relevant with the utility model.
As shown in Figure 1, the utility model provides a kind of singlechip experimental box with circuit state visualization function, comprise single-chip microcomputer, switch input circuit, external clock source circuit, external interrupt request circuit, LED display circuit, matrix keyboard circuit and relay circuit, switch input circuit is connected with the P1 interface of single-chip microcomputer, external clock source circuit is connected with the T0 interface of single-chip microcomputer, INT0 interface and the INT1 interface of external interrupt request circuit and single-chip microcomputer are connected, LED display circuit is connected with the P0 interface of single-chip microcomputer, matrix keyboard circuit is connected with the P2 interface of single-chip microcomputer, relay circuit is connected with the WR interface of single-chip microcomputer, switch input circuit is connected with on off state display circuit, external clock source circuit is connected with clock status display circuit, external interrupt request circuit is connected with interrupt request status display circuit, matrix keyboard circuit is connected with key-press status display circuit, relay circuit is connected with relay status display circuit.
As shown in Figure 2, switch input circuit comprises eight key switch U11, eight key switch U11 comprise eight switches, on off state display circuit comprises light emitting diode D10 ~ D17, one end ground connection of eight switches, in addition one end be connected with the negative electrode of light emitting diode D10 ~ D17 respectively, and be connected with P1.0 ~ P1.7 interface of single-chip microcomputer, being in series with a resistance between the anode of light emitting diode D10 ~ D17 and+5V power supply is respectively 10K Ω first current-limiting resistance, when one of them in eight switches is closed, input 0 on corresponding P1 interface, and corresponding one lights in light emitting diode D10 ~ D17, otherwise, input 1 on corresponding P1 interface, a corresponding extinguishing in light emitting diode D10 ~ D17, thus, whether the state of switch input circuit and switch break down to facilitate student to judge, this circuit also can be used as output circuit use simultaneously, and when certain in eight switches is opened, corresponding P1 interface can use as output pin, and such as, when P1.0 interface exports 1, light emitting diode D0 extinguishes, and when output 0, light emitting diode D0 lights.
As shown in Figure 3, external clock source circuit comprises the timing integrated circuit U2 that model is NE555, model is the Sheffer stroke gate U9A of 7400, single-pole double-throw switch (SPDT) SW_CLK, the output terminal of timing integrated circuit U2 is connected with Sheffer stroke gate U9A input end, the moved end of the another one input end order double-pole double throw switch SW_CLK of Sheffer stroke gate U9A, two of the moved end of single-pole double-throw switch (SPDT) SW_CLK not moved end ground connection and+5V power supplys respectively, the output terminal of Sheffer stroke gate U9A is connected with the T0 interface of single-chip microcomputer, clock status display circuit comprises the impact damper U8A that model is 7407, light emitting diode D_CLK and resistance R4, the input end of impact damper U8A is connected with the output terminal of Sheffer stroke gate U9A, the output terminal of impact damper U8A is connected with the negative electrode of the diode D_CLK that gives out light, give out light after the anode of diode D_CLK is connected with resistance R4 and connect+5V power supply, timing integrated circuit U2 and resistance R2, resistance R3, electric capacity C3 and electric capacity C4 forms multivibrator, and as the external clock reference of counter together with Sheffer stroke gate U9A, frequency is about 1Hz, when the moved end of single-pole double-throw switch (SPDT) SW_CLK is communicated with+5V power supply, oscillator signal can arrive T0 interface, light emitting diode D_CLK flicker simultaneously, if external clock source circuit breaks down, light emitting diode D_CLK does not then work, if normally worked, and can also by observing the flashing times of light emitting diode D_CLK, judge that T0 interface end have input how many oscillation period, be convenient to the understanding to counter works process.
As shown in Figure 4, external interrupt request circuit comprises the timing integrated circuit U3 and timing integrated circuit U4 that model is NE555, model is Sheffer stroke gate U9B and the Sheffer stroke gate U9C and button S_INT0 and button S_INT1 of 7400, one end ground connection of button S_INT0, the trigger end of an other termination timing integrated circuit U3, the output terminal of timing integrated circuit U3 is connected with two of Sheffer stroke gate U9B input ends, the output terminal of Sheffer stroke gate U9B is connected with the INT0 interface of single-chip microcomputer, one end ground connection of button S_INT1, the trigger end of an other termination timing integrated circuit U4, the output terminal of timing integrated circuit U4 is connected with two of Sheffer stroke gate U9C input ends, the output terminal of Sheffer stroke gate U9C is connected with the INT1 interface of single-chip microcomputer, interrupt request status display circuit comprises impact damper U8B and the impact damper U8C that model is 7407, light emitting diode D_PLUS1, light emitting diode D_PLUS2, resistance R6 and resistance R8, the input end of impact damper U8B is connected with the output terminal of Sheffer stroke gate U9B, the output terminal of impact damper U8B is connected with the negative electrode of the diode D_PLUS1 that gives out light, give out light after the anode of diode D_PLUS1 is connected with resistance R6 and connect+5V power supply, the input end of impact damper U8C is connected with the output terminal of Sheffer stroke gate U9C, the output terminal of impact damper U8C is connected with the negative electrode of the diode D_PLUS2 that gives out light, give out light after the anode of diode D_PLUS2 is connected with resistance R8 and connect+5V power supply, two monostable circuits are made up of timing integrated circuit U3 and timing integrated circuit U4 and related resistors and electric capacity respectively, if external interrupt request circuit breaks down, light emitting diode D_PLUS1 and light emitting diode D_PLUS2 does not work.After button S_INT0 presses, generation low level single steady signal send the INT1 interface of single-chip microcomputer, and light emitting diode D_PLUS1 is once bright simultaneously, as external interrupt request signal; After button S_INT1 presses, generation low level single steady signal send the INT1 of single-chip microcomputer, and light emitting diode D_PLUS2 is once bright simultaneously, as external interrupt request signal.
As shown in Figure 5, LED display circuit comprises light emitting diode L1 ~ L8, model is the group of four figures pipe LED1 of 3641AH, model is 3611AG and charactron LED2, the negative electrode of light emitting diode L1 ~ L8, eight sections of group of four figures pipe LED1 select eight sections choosing ends of end and charactron LED2 to be connected and a model of connecting respectively is be connected with the P0 interface of single-chip microcomputer after the impact damper of 7407, four position choosings of group of four figures pipe LED1 hold a model of connecting respectively to be connected with P2.4 ~ P2.7 interface of single-chip microcomputer after the impact damper of 7407, the second current-limiting resistance that a resistance is 10K Ω is in series with respectively between the anode of light emitting diode L1 ~ L8 and+5V power supply, LED display circuit can complete the experiment of LED static state display, and light emitting diode L1 ~ L8 carries out horse race lamp experiment by the data of the P0 interface reading single-chip microcomputer.
As shown in Figure 6, matrix keyboard circuit comprises button S204 ~ S207, button S214 ~ S217, button S224 ~ S227, button S234 ~ S237 and button K20 ~ K27, be connected with the P2.0 interface of single-chip microcomputer after one end of button S204 ~ S207 is connected, one end is connected with P2.4 ~ P2.7 interface of single-chip microcomputer respectively in addition, be connected with the P2.1 interface of single-chip microcomputer after one end of button S214 ~ S217 is connected, one end is connected with P2.4 ~ P2.7 interface of single-chip microcomputer respectively in addition, be connected with the P2.2 interface of single-chip microcomputer after one end of button S224 ~ S227 is connected, one end is connected with P2.4 ~ P2.7 interface of single-chip microcomputer respectively in addition, be connected with the P2.3 interface of single-chip microcomputer after one end of button S234 ~ S237 is connected, one end is connected with P2.4 ~ P2.7 interface of single-chip microcomputer respectively in addition, one end of button K20 ~ K27 is connected with P2.0 ~ P2.7 interface of single-chip microcomputer respectively, one end ground connection in addition, key-press status display circuit comprises light emitting diode D20 ~ D27, the negative electrode of light emitting diode D20 ~ D27 is connected with P2.0 ~ P2.7 interface of single-chip microcomputer respectively, the 3rd current-limiting resistance that a resistance is 10K Ω is in series with respectively between anode and+5V power supply, P2.0 ~ P2.3 interface is row, P2.4 ~ P2.7 interface is row, form 4 × 4 determinant keyboards.Button K20 ~ K27 forms free-standing button, when the button of in button K20 ~ K27 is pressed, corresponding P2 interface input 0, simultaneously in light emitting diode D20 ~ D27 corresponding one be lit.
Key-press status display circuit can realize following functions
1, when 4 × 4 determinant keyboards are lined by line scan, can as by the instruction of row scanned;
2, when 4 × 4 determinant keyboards are lined by line scan, can as the instruction of pressing key.Such as, when the button be connected with P2.1 and P2.5 is pressed, sweep to P21 capable time, light emitting diode D21 and D25 can be lit;
3, in like manner, the instruction that can be pressed as free-standing button
4, when P2 interface is not as input through keyboard, D20 ~ D27 as output device, can realize the functions such as running lamp.
As shown in Figure 7, relay circuit comprises single-pole double-throw relay, triode Q2 and resistance R21, one termination+5V power supply of the solenoid of single-pole double-throw relay, one end is connected with the collector of triode Q2 in addition, resistance R21 is connected between the base stage of triode Q2 and the WR interface of single-chip microcomputer, the grounded emitter of triode Q2, relay status display circuit comprises light emitting diode D1 and resistance R22, the anode of light emitting diode D1 connects+5V power supply after connecting with resistance R22, and negative electrode is connected with the collector of triode Q2; Single-pole double-throw relay adopts model to be that 9013 triode Q2 drive, and when the WR interface of single-chip microcomputer is low level, triode Q2 turns off, single-pole double-throw relay not adhesive, and normally closed contact closes, and normally opened contact is opened, and light emitting diode D1 extinguishes; Otherwise then light emitting diode D1 is lit, thus intuitively can show the state of relay circuit.
Also comprise buzzer circuit, buzzer circuit comprises loudspeaker SP1, resistance R18, triode Q1 and resistance R19, one end of loudspeaker SP1 connects+5V power supply after connecting with resistance R18, one end is connected with the emitter of triode Q1 in addition, and the base stage of triode Q1 is connected on the RD interface of single-chip microcomputer after connecting with resistance R19, grounded collector, loudspeaker SP1 adopts model to be that 9012 triode Q1 drive, when RD end is for low level, triode ON, loudspeaker SP1 sends the sound.
With above-mentioned according to desirable embodiment of the present utility model for enlightenment, by above-mentioned description, relevant staff in the scope not departing from this utility model technological thought, can carry out various change and amendment completely.The technical scope of this utility model is not limited to the content on instructions, must determine its technical scope according to right.
Claims (9)
1. one kind has the singlechip experimental box of circuit state visualization function, comprise single-chip microcomputer, switch input circuit, external clock source circuit, external interrupt request circuit, LED display circuit, matrix keyboard circuit and relay circuit, described switch input circuit is connected with the P1 interface of described single-chip microcomputer, external clock source circuit is connected with the T0 interface of described single-chip microcomputer, INT0 interface and the INT1 interface of described external interrupt request circuit and described single-chip microcomputer are connected, described LED display circuit is connected with the P0 interface of described single-chip microcomputer, described matrix keyboard circuit is connected with the P2 interface of described single-chip microcomputer, described relay circuit is connected with the WR interface of described single-chip microcomputer, it is characterized in that: described switch input circuit is connected with on off state display circuit, described external clock source circuit is connected with clock status display circuit, described external interrupt request circuit is connected with interrupt request status display circuit, described matrix keyboard circuit is connected with key-press status display circuit, described relay circuit is connected with relay status display circuit.
2. there is the singlechip experimental box of circuit state visualization function as claimed in claim 1, it is characterized in that: described switch input circuit comprises eight switches, described on off state display circuit comprises light emitting diode D10 ~ D17, one end ground connection of described eight switches, in addition one end be connected with the negative electrode of described light emitting diode D10 ~ D17 respectively, and be connected with P1.0 ~ P1.7 interface of described single-chip microcomputer, be in series with first current-limiting resistance between the anode of described light emitting diode D10 ~ D17 and+5V power supply respectively.
3. have the singlechip experimental box of circuit state visualization function as claimed in claim 2, it is characterized in that: described switch input circuit comprises eight key switch U11, described eight key switch U11 comprise described eight switches.
4. there is the singlechip experimental box of circuit state visualization function as claimed in claim 1, it is characterized in that: described external clock source circuit comprises the timing integrated circuit U2 that model is NE555, model is the Sheffer stroke gate U9A of 7400, single-pole double-throw switch (SPDT) SW_CLK, the output terminal of described timing integrated circuit U2 is connected with an input end of described Sheffer stroke gate U9A, the moved end of single-pole double-throw switch (SPDT) SW_CLK described in the another one input termination of described Sheffer stroke gate U9A, two of the moved end of described single-pole double-throw switch (SPDT) SW_CLK not moved end ground connection and+5V power supplys respectively, the output terminal of described Sheffer stroke gate U9A is connected with the T0 interface of described single-chip microcomputer, described clock status display circuit comprises the impact damper U8A that model is 7407, light emitting diode D_CLK and resistance R4, the input end of described impact damper U8A is connected with the output terminal of described Sheffer stroke gate U9A, the output terminal of described impact damper U8A is connected with the negative electrode of described light emitting diode D_CLK, the anode of described light emitting diode D_CLK connects+5V power supply after connecting with described resistance R4.
5. there is the singlechip experimental box of circuit state visualization function as claimed in claim 1, it is characterized in that: described external interrupt request circuit comprises the timing integrated circuit U3 and timing integrated circuit U4 that model is NE555, model is Sheffer stroke gate U9B and the Sheffer stroke gate U9C and button S_INT0 and button S_INT1 of 7400, one end ground connection of described button S_INT0, the trigger end of timing integrated circuit U3 described in an other termination, the output terminal of described timing integrated circuit U3 is connected with two input ends of described Sheffer stroke gate U9B, the output terminal of described Sheffer stroke gate U9B is connected with the INT0 interface of described single-chip microcomputer, one end ground connection of described button S_INT1, the trigger end of timing integrated circuit U4 described in an other termination, the output terminal of described timing integrated circuit U4 is connected with two input ends of described Sheffer stroke gate U9C, the output terminal of described Sheffer stroke gate U9C is connected with the INT1 interface of described single-chip microcomputer, described interrupt request status display circuit comprises impact damper U8B and the impact damper U8C that model is 7407, light emitting diode D_PLUS1, light emitting diode D_PLUS2, resistance R6 and resistance R8, the input end of described impact damper U8B is connected with the output terminal of described Sheffer stroke gate U9B, the output terminal of described impact damper U8B is connected with the negative electrode of described light emitting diode D_PLUS1, the anode of described light emitting diode D_PLUS1 connects+5V power supply after connecting with described resistance R6, the input end of described impact damper U8C is connected with the output terminal of described Sheffer stroke gate U9C, the output terminal of described impact damper U8C is connected with the negative electrode of described light emitting diode D_PLUS2, the anode of described light emitting diode D_PLUS2 connects+5V power supply after connecting with described resistance R8.
6. there is the singlechip experimental box of circuit state visualization function as claimed in claim 1, it is characterized in that: described LED display circuit comprises light emitting diode L1 ~ L8, model is the group of four figures pipe LED1 of 3641AH, model is 3611AG and charactron LED2, the negative electrode of described light emitting diode L1 ~ L8, eight sections of group of four figures pipe LED1 select eight sections choosing ends of end and charactron LED2 to be connected and a model of connecting respectively is be connected with the P0 interface of described single-chip microcomputer after the impact damper of 7407, four position choosings of described group of four figures pipe LED1 hold a model of connecting respectively to be connected with P2.4 ~ P2.7 interface of described single-chip microcomputer after the impact damper of 7407, second current-limiting resistance is in series with respectively between the anode of described light emitting diode L1 ~ L8 and+5V power supply.
7. there is the singlechip experimental box of circuit state visualization function as claimed in claim 1, it is characterized in that: described matrix keyboard circuit comprises button S204 ~ S207, button S214 ~ S217, button S224 ~ S227, button S234 ~ S237 and button K20 ~ K27, be connected with the P2.0 interface of described single-chip microcomputer after one end of described button S204 ~ S207 is connected, one end is connected with P2.4 ~ P2.7 interface of described single-chip microcomputer respectively in addition, be connected with the P2.1 interface of described single-chip microcomputer after one end of described button S214 ~ S217 is connected, one end is connected with P2.4 ~ P2.7 interface of described single-chip microcomputer respectively in addition, be connected with the P2.2 interface of described single-chip microcomputer after one end of described button S224 ~ S227 is connected, one end is connected with P2.4 ~ P2.7 interface of described single-chip microcomputer respectively in addition, be connected with the P2.3 interface of described single-chip microcomputer after one end of described button S234 ~ S237 is connected, one end is connected with P2.4 ~ P2.7 interface of described single-chip microcomputer respectively in addition, one end of described button K20 ~ K27 is connected with P2.0 ~ P2.7 interface of described single-chip microcomputer respectively, one end ground connection in addition, described key-press status display circuit comprises light emitting diode D20 ~ D27, the negative electrode of described light emitting diode D20 ~ D27 is connected with P2.0 ~ P2.7 interface of described single-chip microcomputer respectively, the 3rd current-limiting resistance is in series with respectively between anode and described+5V power supply.
8. there is the singlechip experimental box of circuit state visualization function as claimed in claim 1, it is characterized in that: described relay circuit comprises single-pole double-throw relay, triode Q2 and resistance R21, one termination+5V power supply of the solenoid of described single-pole double-throw relay, one end is connected with the collector of described triode Q2 in addition, between the base stage that described resistance R21 is connected on described triode Q2 and the WR interface of described single-chip microcomputer, the grounded emitter of described triode Q2, described relay status display circuit comprises light emitting diode D1 and resistance R22, the anode of described light emitting diode D1 connects+5V power supply after connecting with described resistance R22, negative electrode is connected with the collector of described triode Q2.
9. there is the singlechip experimental box of circuit state visualization function as claimed in claim 1, it is characterized in that: also comprise buzzer circuit, described buzzer circuit comprises loudspeaker SP1, resistance R18, triode Q1 and resistance R19, one end of described loudspeaker SP1 connects+5V power supply after connecting with described resistance R18, one end is connected with the emitter of described triode Q1 in addition, the base stage of described triode Q1 is connected on the RD interface of described single-chip microcomputer after connecting with described resistance R19, grounded collector.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107967851A (en) * | 2017-12-21 | 2018-04-27 | 重庆工程职业技术学院 | A kind of SCM Experimentation Teaching system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107967851A (en) * | 2017-12-21 | 2018-04-27 | 重庆工程职业技术学院 | A kind of SCM Experimentation Teaching system |
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