CN204348194U - A kind of single-chip microcomputer and experimental panel for programmable logic device - Google Patents

Abstract

The utility model discloses an experiment board for a single-chip microcomputer and a programmable logic device; it belongs to the technical field of teaching appliances; its technical points include a main body of the experiment board and a power interface arranged on the main body of the experiment board. The programmable logic device power supply circuit; the programmable logic device power supply circuit is connected with the minimum programmable logic device system, and the programmable logic device minimum system is connected with the JTAG interface circuit; the single chip microcomputer minimum system is connected with the level conversion circuit, and the level conversion circuit is connected with the single chip microcomputer The programming/debugging interface; the minimum system of the single-chip microcomputer is connected with an input module; the minimum system of the single-chip microcomputer is connected with an output module; the utility model aims to provide a single-chip microcomputer and programmable logic device experiment board with good effect and convenient use; it is used for experiments.

Description

A single-chip microcomputer and programmable logic device experiment board

technical field

The utility model relates to an experiment board, in particular to an experiment board for a single-chip microcomputer and a programmable logic device.

Background technique

Single-chip microcomputer, digital circuit and digital logic, and electronic design automation are three very important professional courses of electronic information and automatic control disciplines in colleges and universities. .

The best way to learn the above three courses well is to do it yourself. The hardware of the existing commercialized experimental system in university laboratories is fixed and not completely transparent, and students can only conduct limited verification experiments. During the learning process, many students will buy various small experimental boards from online stores. The advantage of this is that it can be used directly. The disadvantage is that students do not have a deep understanding of the hardware of the experimental board system. The experimental boards purchased can only meet the teaching needs of a certain course, and the price is relatively expensive. The common parts of each experimental board cannot be used. reuse. For some MCU experiment boards in the market, an additional downloader must be purchased when programming firmware for the MCU; if you want to realize the simulation function, you must purchase a MCU emulator. Whether it is a downloader or an emulator, its cost is high, even higher than that of the experimental board.

From the four perspectives of reducing students' learning costs, improving students' hands-on ability, training students to master microprocessor architecture design methods, and meeting the skills requirements of companies for job seekers, it is necessary to make a self-made one that combines single-chip microcomputers and programmable logic devices. It is an experimental teaching instrument that can meet the teaching needs of multiple courses and can download and burn programs.

Utility model content

The purpose of the utility model is to provide a single-chip microcomputer and programmable logic device experiment board which is easy to use and has good effect in view of the deficiencies in the prior art.

The technical scheme of the utility model is realized in the following way: a single-chip microcomputer and programmable logic device experiment board, including the main body of the experiment board and the power interface provided on the main body of the experiment board, the power interface is respectively connected with the minimum system of the single-chip microcomputer and the programmable logic device Power circuit; the power circuit of the programmable logic device is connected with the minimum system of the programmable logic device, and the minimum system of the programmable logic device is connected with the JTAG interface circuit; interface; the minimum system of the single-chip microcomputer is connected with an input module; the minimum system of the single-chip microcomputer is connected with an output module.

In the aforementioned single-chip microcomputer and programmable logic device experiment board, the minimum system of the single-chip microcomputer includes a single-chip microcomputer, a single-chip microcomputer reset circuit, a single-chip microcomputer clock circuit, and a single-chip microcomputer IO port expansion interface.

In the above-mentioned one-chip microcomputer and programmable logic device experiment board, the minimum system of the programmable logic device includes the programmable logic device, the reset circuit of the programmable logic device, the clock circuit of the programmable logic device, and the IO port expansion interface of the programmable logic device.

In the aforementioned single-chip microcomputer and programmable logic device experiment board, the single-chip microcomputer is connected with an automatic control module, and the automatic control module includes a Darlington tube drive circuit, a motor interface and a relay circuit.

In the aforementioned single-chip microcomputer and programmable logic device experiment board, the single-chip microcomputer is connected with an analog quantity module, and the analog quantity module includes an analog-to-digital conversion analog voltage generation circuit and a digital-to-analog conversion circuit.

In the aforementioned single-chip microcomputer and programmable logic device experiment board, the single-chip microcomputer is connected with an obstacle detection module, and the obstacle detection module includes an ultrasonic module interface and an infrared transmitting and receiving tube circuit.

In the above-mentioned one-chip microcomputer and programmable logic device experiment board, the single-chip microcomputer is connected with a serial bus module, and the serial bus module includes a temperature and humidity sensor circuit, a temperature sensor circuit, an electrically erasable programmable memory circuit, a real-time clock circuit And a short-distance wireless communication module interface.

In the aforementioned single-chip microcomputer and programmable logic device experiment board, mounting holes are provided on the edge of the main body of the experiment board, and support columns are provided in the mounting holes.

In the above-mentioned single-chip microcomputer and programmable logic device experiment board, the output module includes a Chinese character liquid crystal interface, an OLED liquid crystal interface, a character liquid crystal interface, a four-in-one common anode digital tube interface, a passive buzzer circuit, a light emitting diode circuit, 8×8 single-color LED dot matrix circuit and LED drive circuit; the LED drive circuit is connected in series with the four-in-one common anode digital tube interface, and the 8×8 single-color LED dot matrix circuit is connected in parallel with the four-in-one common anode digital tube interface.

In the above-mentioned single-chip microcomputer and programmable logic device experiment board, the input module includes a dial switch circuit, an infrared receiver circuit and a matrix keyboard.

After the utility model adopts the above-mentioned structure, the experiment board integrates simulation, download and experiment. According to different needs, different types of single-chip microcomputers are installed, and the program written by the computer is downloaded to the STC12C5A60S2 single-chip microcomputer through the single-chip microcomputer programming/debugging interface, and the full-speed operation experiment is carried out. ;Load the program written by the computer to the SST89E516RD single-chip microcomputer through the single-chip programming/debugging interface, carry out hardware simulation, and debug the program; download the CPLD program to the EPM7128SLC84 through the JTAG interface, and perform full-speed operation experiments. All functional module resources on the experiment board can be independently controlled by a single-chip microcomputer or a programmable logic device.

The utility model has the following advantages and characteristics:

First, the utility model has a single-chip microcomputer and a programmable logic device with high cost performance, powerful functions, abundant internal resources, and a large number of IO interfaces, and can be used for beginners to learn two different types of processors at the same time.

Second, the utility model integrates an input module, an output module, a serial bus module, an analog module, an automatic control module, and an obstacle detection module, etc., so that the experiment board has powerful peripheral support, and these modules can use single-chip microcomputers or programmable logic Devices are individually controlled, which can improve the utilization rate of peripheral devices and save equipment purchase costs.

Third, all the IO interfaces of the single-chip microcomputer and the programmable logic device of the utility model are drawn out through pin headers, which is convenient for users to use the experiment board as a motherboard to connect and control other devices for secondary development experiments.

Fourth, the utility model can install different types of single-chip microcomputers according to needs, and can realize hardware simulation and downloading functions without additional hardware equipment support. Other general-purpose 51 series single-chip microcomputers in DIP40 packages that have been programmed can be directly installed on this experiment board, and the modules on this experiment board can be used for experiments.

Fifth, the power supply of the programmable logic device of the present invention has two options of 5V and 3.3V, so that the programmable logic device can work independently under two different voltages, which is convenient for users to use the experimental board as a motherboard to control different work Voltage peripherals for extended experiments.

Description of drawings

The utility model will be further described in detail below in conjunction with the embodiments in the accompanying drawings, but it does not constitute any limitation to the utility model.

Fig. 1 is the structural representation of the utility model;

Fig. 2 is a schematic diagram of circuit connection block structure.

In the figure: experiment board main body 1, installation hole 1a, power interface 2, minimum system of single-chip microcomputer 3, single-chip microcomputer 3a, single-chip microcomputer reset circuit 3b, single-chip microcomputer clock circuit 3c, single-chip microcomputer IO port expansion interface 3d, programmable logic device power circuit 4, programmable logic device PLD minimum system 5, PLD 5a, PLD reset circuit 5b, PLD clock circuit 5c, PLD IO port expansion interface 5d, JTAG interface circuit 6, level conversion circuit 7, MCU programming/debugging interface 8, input module 9, output module 10, Darlington tube drive circuit 11, motor interface 12, relay circuit 13, analog-to-digital conversion analog voltage generation circuit 14, digital-to-analog conversion circuit 15, ultrasonic module interface 16 , Infrared transmitting and receiving tube circuit 17, temperature and humidity sensor circuit 18, temperature sensor circuit 19, electrically erasable programmable memory circuit 20, real-time clock circuit 21, short-distance wireless communication module interface 22, Chinese character liquid crystal interface 23, OLED LCD interface 24, character LCD interface 25, four-in-one common anode digital tube interface 26, passive buzzer circuit 27, light-emitting diode circuit 28, 8×8 single-color LED dot matrix circuit 29, LED drive circuit 30, dial code Switching circuit 31 , infrared receiver circuit 32 , matrix keyboard 33 .

Detailed ways

Referring to Fig. 1 and shown in Fig. 2, a kind of single-chip microcomputer and programmable logic device experiment board of the present utility model, comprise experiment board main body 1 and be located at the power interface 2 on the experiment board main body 1, be provided with on the experiment board main body 1 edge The installation hole 1a is provided with a support column in the installation hole 1a, and the support column raises the experimental board to prevent the circuit under the experimental board from touching other conductors and causing a short circuit. The power interface 2 is respectively connected with a minimum system 3 of a single chip microcomputer and a power supply circuit 4 of a programmable logic device. The minimum single-chip microcomputer system 3 includes a single-chip microcomputer 3a, a single-chip microcomputer reset circuit 3b, a single-chip microcomputer clock circuit 3c, and a single-chip microcomputer IO port expansion interface 3d. Preferably, the model of the single-chip microcomputer 3a is STC12C5A60S2 or SST89E516RD. Preferably, the model of the PLD power supply regulator chip in the PLD power supply circuit 4 is ASM1117-3.3. The programmable logic device power supply circuit 4 is connected with a programmable logic device minimum system 5, and the programmable logic device minimum system 5 includes a programmable logic device 5a, a programmable logic device reset circuit 5b, a programmable logic device clock circuit 5c and a programmable logic device Device IO port expansion interface 5d. Preferably, the model of the programmable logic device 5a is EPM7128SLC84. The minimum programmable logic device system 5 is connected with a JTAG interface circuit 6 . The minimum system 3 of the single-chip microcomputer is connected with a level conversion circuit 7, preferably, the model of the level converter in the level conversion circuit 7 is MAX232CPE. The level conversion circuit 7 is connected with a single-chip microcomputer programming/debugging interface 8, preferably, the single-chip microcomputer programming/debugging interface 8 is a DB9 female RS232 serial port. The minimum single-chip microcomputer system 3 is connected with an input module 9, which includes a dial switch circuit 31, an infrared receiver circuit 32, and a matrix keyboard 33. The input module 9 can be used to identify user control information. Preferably, the model of the infrared receiving head in the infrared receiving head circuit 32 is TL1838, and the matrix keyboard 33 is composed of 16 tact switches. Under the control of the keyboard working mode control terminal, the matrix keyboard 33 can work on 1×4 independent keys and 4×4 matrix keyboard to improve the utilization rate of hardware; when the MCU 3a completes the 4×4 matrix keyboard experiment, row scanning method, column scanning method and line inversion method can be used. The minimum single-chip microcomputer system 3 is connected with an output module 10, and the output module 10 includes a Chinese character liquid crystal interface 23, an OLED liquid crystal interface 24, a character liquid crystal interface 25, a four-in-one common anode digital tube interface 26, a passive buzzer circuit 27, The light-emitting diode circuit 28, the 8×8 single-color LED dot matrix circuit 29, the LED drive circuit 30, and the output module 10 can complete sound and light output experiments. The LED drive circuit 30 is connected in series with the four-in-one common anode digital tube interface 26, the 8×8 monochrome LED dot matrix circuit 29 is connected in parallel with the four-in-one common anode digital tube interface 26, and the LED drive circuit 30 realizes the current amplification function for driving Four-in-one common anode digital tube and 8×8 single-color LED dot matrix, preferably, the model of the LED driver in the LED driving circuit 30 is S9012.

Preferably, the Chinese character liquid crystal connected to the Chinese character liquid crystal interface 23 is a general-purpose 128×64 dot matrix liquid crystal, which can complete Chinese character, character or image display experiments. The OLED display connected to the OLED liquid crystal interface 24 is a general-purpose 128×64 electromechanical laser display, which can complete Chinese characters, characters or image display experiments; the character liquid crystal connected to the character liquid crystal interface 25 is a general 16×2 dot matrix liquid crystal, which can complete character Show experiments. When in use, adjust the contrast or backlight of the Chinese character LCD through the Chinese character LCD contrast adjustment knob or the Chinese character LCD backlight control switch, and adjust the character LCD contrast or backlight through the character LCD contrast adjustment knob or the character LCD backlight control switch. To make the results of the experiment more clear and visible, in this embodiment, the Chinese character liquid crystal contrast adjustment circuit and the Chinese character liquid crystal backlight control circuit, the character liquid crystal contrast adjustment circuit and the character liquid crystal backlight control circuit are all integrated on the main body 1 of the experiment board and Corresponding interface connection. The four-in-one common-anode digital tube connected to the interface 26 of the four-in-one common-anode digital tube can complete the dynamic scanning experiment of the digital tube; the 8×8 single-color LED dot matrix can adopt three working modes of point scanning, row scanning and column scanning.

Further, the single-chip microcomputer 3a of the present utility model can also be connected with some other modules, carry out various experiments:

The single-chip microcomputer 3a is connected with an automatic control module for performing automatic control experiments. The automatic control module includes a Darlington tube drive circuit 11 , a motor interface 12 and a relay circuit 13 . Preferably, the model of the Darlington driver connected to the Darlington drive circuit 11 is ULN2003; the model of the stepper motor connected to the motor interface 12 is 28BYJ-48.

The single-chip microcomputer 3 a is connected with an analog module, and the analog module includes an analog-to-digital conversion analog voltage generation circuit 14 and a digital-to-analog conversion circuit 15 . The analog-to-digital conversion analog voltage generation circuit 14 can perform analog-to-digital conversion experiments, and the digital-to-analog conversion circuit 15 can perform digital-to-analog conversion experiments.

The single-chip microcomputer 3a is connected with an obstacle detection module for performing obstacle detection experiments. The obstacle detection module includes an ultrasonic module interface 16 and an infrared transmitting and receiving tube circuit 17 . Preferably, the model of the ultrasonic module in the ultrasonic module interface 16 is KX-U0904; the model of the infrared emitting and receiving paired tube in the infrared emitting and receiving paired tube circuit 17 is ST178.

The single-chip microcomputer 3a is connected with a serial bus module, and the serial bus module includes a temperature and humidity sensor circuit 18 , a temperature sensor circuit 19 , an electrically erasable programmable memory circuit 20 , a real-time clock circuit 21 and a short-distance wireless communication module interface 22 . Preferably, the model of the temperature and humidity sensor in the temperature and humidity sensor circuit 18 is DHT11, which is used to detect the temperature and humidity of the surrounding environment of the experimental board; the model of the temperature sensor in the temperature sensor circuit 19 is DS18B20, which is used to detect the temperature of the surrounding environment of the experimental board ; In the electric erasable programmable memory circuit 20, the model of the electric erasable programmable memory is AT24C02, which is used to complete the I ² C bus communication, and verify the function of EEPROM memory power-down preservation data; in the real-time clock circuit 21, the The model of the clock is DS1302, which is used to complete the serial communication of the three-wire SPI bus for real-time clock experiments; the model of the short-distance wireless communication module in the interface 22 of the short-distance wireless communication module is nRF24L01, which is used to complete the four-wire SPI bus Communication experiment.

When in use, an external DC voltage of 5V is provided to the power interface 2, and the DC power jack of 5V is used for the power interface 2, and the output DC voltage is connected to the pin of the single-chip microcomputer 3a. The converted voltage is supplied to the programmable logic device 5a as an input power supply. The computer serial port is used to connect the single-chip microcomputer programming/debugging interface 8, and the level conversion circuit 7 plays a role of level conversion, thereby realizing the serial communication between the computer and the single-chip microcomputer 3a. The computer is connected with the JTAG interface circuit 6 to realize the communication between the computer and the programmable logic device 5a. The single-chip microcomputer 3a and the programmable logic device 5a can independently control the input module 9, the output module 10, the serial bus module, the analog module, the automatic control module and the obstacle detection module, etc., so that the experiment board has strong peripheral support and can improve The utilization rate of peripheral devices saves equipment purchase costs.

The above-mentioned embodiments are preferred implementation modes of the present utility model, which are only used to facilitate the description of the present utility model, and are not intended to limit the present utility model in any form. Anyone with ordinary knowledge in the technical field, if they do not depart from this utility model Within the scope of the technical features mentioned in the utility model, the equivalent embodiments that make partial changes or modifications made by using the technical content disclosed in the utility model, and do not deviate from the technical features of the utility model, still belong to the technical features of the utility model In the range.

Claims (10)

1. a single-chip microcomputer and experimental panel for programmable logic device, comprise brassboard main body (1) and be located at the power interface (2) in brassboard main body (1), it is characterized in that, power interface (2) is connected to single-chip minimum system (3) and programmable logic device (PLD) power circuit (4); Programmable logic device (PLD) power circuit (4) is connected with programmable logic device (PLD) minimum system (5), and programmable logic device (PLD) minimum system (5) is connected with jtag interface circuit (6); Single-chip minimum system (3) is connected with level shifting circuit (7), and level shifting circuit (7) is connected with mcu programming/debugging interface (8); Single-chip minimum system (3) is connected with load module (9); Single-chip minimum system (3) is connected with output module (10).

2. a kind of single-chip microcomputer according to claim 1 and experimental panel for programmable logic device, it is characterized in that, single-chip minimum system (3) comprises single-chip microcomputer (3a), reset circuit of SCM (3b), Singlechip clock circuit (3c) and single-chip I/O mouth expansion interface (3d).

3. a kind of single-chip microcomputer according to claim 1 and experimental panel for programmable logic device, it is characterized in that, programmable logic device (PLD) minimum system (5) comprises programmable logic device (PLD) (5a), programmable logic device (PLD) reset circuit (5b), programmable logic device (PLD) clock circuit (5c) and programmable logic device (PLD) I/O port expansion interface (5d).

4. a kind of single-chip microcomputer according to Claims 2 or 3 and experimental panel for programmable logic device, it is characterized in that, single-chip microcomputer (3a) is connected with automatic control module, and described automatic control module comprises Darlington transistor driving circuit (11), motor interface (12) and relay circuit (13).

5. a kind of single-chip microcomputer according to Claims 2 or 3 and experimental panel for programmable logic device, it is characterized in that, single-chip microcomputer (3a) is connected with analog module, and described analog module comprises analog to digital conversion analog voltage and produces circuit (14) and D/A converting circuit (15).

6. a kind of single-chip microcomputer according to Claims 2 or 3 and experimental panel for programmable logic device, it is characterized in that, single-chip microcomputer (3a) is connected with detection of obstacles module, and described detection of obstacles module comprises ultrasonic wave module interface (16) and infrared emission receives pipe circuit (17).

7. a kind of single-chip microcomputer according to Claims 2 or 3 and experimental panel for programmable logic device, it is characterized in that, single-chip microcomputer (3a) is connected with serial bus module, and described serial bus module comprises Temperature Humidity Sensor circuit (18), temperature sensor circuit (19), electric erasable programmable memory device circuit (20), real time clock circuit (21) and short-range wireless communication module interface (22).

8. a kind of single-chip microcomputer according to claim 1 and experimental panel for programmable logic device, is characterized in that, is provided with mounting hole (1a) at brassboard main body (1) edge, in mounting hole (1a), be provided with support column.

9. a kind of single-chip microcomputer according to claim 1 and experimental panel for programmable logic device, it is characterized in that, described output module (10) comprises Chinese character liquid crystal interface (23), OLED liquid crystal interface (24), character liquid crystal interface (25), quaternity common anode charactron interface (26), passive buzzer circuit (27), circuit of LED (28), 8 × 8 monochromatic LED dot matrix circuit (29) and LED drive circuit (30); LED drive circuit (30) is connected with quaternity common anode charactron interface (26), and 8 × 8 monochromatic LED dot matrix circuit (29) are in parallel with quaternity common anode charactron interface (26).

10. a kind of single-chip microcomputer according to claim 1 and experimental panel for programmable logic device, it is characterized in that, described load module (9) comprises toggle switch circuit (31), infrared receiving terminal circuit (32) and matrix keyboard (33).