STC15-based embedded teaching system

Abstract

The invention discloses an embedded teaching system device based on STC15. The embedded teaching system device comprises a PCB, and the four corners of the PCB are each provided with a through round hole for installing a supporting column; an LCD liquid crystal display is arranged on the upper left portion of the PCB. An interface of the traffic light auxiliary board is arranged right above the PCB; a unit nixie tube display and two four-digit nixie tube displays are arranged at the right upper part of the PCB; a USB340 downloading area is arranged above the left side of the middle part of the mainboard area; a mainboard power supply area is arranged below the left side of the middle part of the mainboard area; an MCU main control chip is arranged in the middle of the front face of the PCB, and ports of various modules are arranged in a mainboard area on the left side of the MCU main control chip. An eight-position flowing water lamp area is arranged in the middle of the PCB; a DS3231 clock area; a 8 * 8 dot matrix area; the rightmost side of the PCB is provided with an interface of the auxiliary board; a steering engine controller and a power supply port of the steering engine are arranged on the lowermost left side of the PCB; the left lower side of the PCB is provided with a voice module and a corresponding loudspeaker port. A four-digit query type keyboard is arranged on the right lower side of the PCB; an active buzzer is arranged on the right lower side of the PCB; a module controlled by a unit relay is arranged on the lowermost right side of the PCB; a printing device name is arranged on the back surface of the PCB; according to the embedded teaching system device based on STC15 provided by the invention, the device is beneficial for teachers to complete teaching content with higher quality, provides abundant practice opportunities, enables students to master embedded development skills in practice, and improves learning efficiency. The device is suitable for a practice teaching device for beginning to learn embedded personnel entry and a training and examination device for factory promotion personnel.

Description

Technical Field

[0001] The invention belongs to the field of electronic equipment technology teaching, and is a practical teaching device for beginners of embedded systems and a training and assessment device for factory promotion personnel, more specifically, an embedded system teaching device based on STC15. Background Art

[0002] With the development of computer technology and integrated circuit technology, embedded systems are widely used in various fields, playing an increasingly important role in communications, networks, industrial control, medical electronics, etc. The demand for embedded technology talents is also increasing, so an effective teaching system is needed to cultivate students' embedded development capabilities.

[0003] This embedded teaching system has the characteristics of high performance, easy development, low power consumption, and low cost. It meets the requirements of energy conservation and environmental protection, is suitable for teaching, and reduces teaching costs. Traditional teaching methods often focus on imparting theoretical knowledge, but lack practical links. The embedded teaching system based on STC15 can provide rich practical opportunities, allowing students to master embedded development skills in practice. Summary of the invention

[0004] The purpose of the present invention is to provide an embedded teaching system device based on STC15, which can help beginners of embedded systems to complete basic experiments, provide a basic unit for students' graduation projects, and provide convenient conditions for embedded learning, application, and development innovation. This device is conducive to teachers completing teaching content with higher quality, providing rich practice opportunities, allowing students to master embedded development skills in practice, and improving learning efficiency.

[0005] In order to achieve the above object, the present invention uses the following technical solutions: The embedded teaching system device based on STC15 includes a PCB board, and an LCD display is provided on the upper left of the PCB: a chip capacitor, an LCD pin header and an adjustable resistor are provided to adjust the brightness of the display screen; There is a traffic light sub-board interface on the top of the PCB: 9-pin interface: VCC, GND, P10-P16 and marked with corresponding interface logos; There is a single-digit digital tube on the upper right side of the PCB that is connected to the P1 port of the microcontroller. Two four-digit digital tubes, the segment code is connected to P00-P07 and the bit code is connected to P20-P27. The interface identification of the bit code and segment code of the four-digit digital tube is marked; The interface of the sub-board is set on the far right of the PCB: 34-pin interface: VCC, GND, P00-P07, P10-P17, P20-P27, P30-P37 and marked with corresponding interface identification; The main control chip MCU is set in the middle of the front of the PCB board. The main board area on the left side of the chip has ports for various modules and is marked with the names of the pins corresponding to this main control chip. There is a USB340 download area on the upper left side of the middle of the mainboard area, which is equipped with corresponding resistors, capacitors, crystal oscillators, CH340 download chips, and SMD LEDs. Its advantage is that it can be downloaded directly via USB data cable, and the display of the download process of two independent SMD LEDs and the jumper cap can be downloaded with other download and burning modules; In the lower left part of the middle of the motherboard area, there are electrolytic capacitors, chip capacitors, chip resistors, chip light-emitting diodes, and a separate power supply port for supplying power to the board, and a separate power indicator light; On the right side of the motherboard area, there are eight-bit running lights connected to the P2 port and the corresponding resistor, the P13 and P14 ports connected to the DS3231 clock chip and the corresponding CR2032 button battery, the P10-P17 ports connected to the C1-C8, and the P00-P07 ports connected to the 8X8 dot matrix display of R1-R8, and the corresponding interface labels are marked; There is a four-digit query keyboard with ports P32, P33, P34, and P35 on the directly underside of the PCB board; The lower left side of the PCB board is equipped with the voice module of the P16 and P17 ports and the corresponding speaker ports; The lower left side of the PCB board is equipped with the P42, P44, and P45 ports for servo control, as well as an independent servo power supply port, which can support up to three servos; The lower right side of the PCB board is equipped with an active buzzer, base bias resistor and PNP transistor of the P55 port; The unit relay control module is located on the far right bottom of the PCB board; The back of the PCB board has the printed device name and the eight-digit voltage divider resistors of the single-digit digital tube; As the invention patent adopts the above technical solution, compared with the prior art, the technical progress achieved is: (1) This invention patent is suitable for beginners of embedded systems. The schematic diagram uses simple circuit connections, the circuits on the circuit board are clear and concise, and the markings are clear and easy to read; (2) The numbers in this invention-type patent project are also marked in a corresponding manner. For example, the output circuit of port P1.1 has pull-up resistor "R11", pull-up light-emitting diode "D11", corresponding expansion port "P11", etc. When writing a program, you only need to look at the circuit board, without having to look up the corresponding circuit diagram, which improves the usability of the device. (3) The download mode of the present invention adopts two download modes: USB to USB and USB to TTL. It is very convenient to download. It only needs a computer and a data cable. The power supply mode is changed to directly use the computer's 5V power supply to improve the safety of electricity use.

[0006] (4) The size of the patented device of the present invention is a compact design, 20cm*10cm in size, which is very convenient to use and only takes up a small space. It can be made by yourself, carried around, and studied anytime and anywhere.

[0007] (5) The inventive patent enriches the interface circuit, which can complete the learning of the basic unit and expand the addition of a series of expansion modules such as temperature sensor, temperature and humidity sensor, time module, LCD display panel, WH-E19 embedded thermal printer, etc., which increases the practicality of teaching. This training equipment is not only used for learning, but can also be used as the basic unit of graduation design. As long as the corresponding modules are added, the production of graduation products can be completed.

[0008] This invention patent is suitable for practical teaching devices for beginners of embedded systems, and is also suitable for training and assessment devices for factory promotion personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation to the present invention. Attached photos

[0010] Figure 1 It is a circuit schematic diagram of the main board area of ​​the present invention.

[0011] Figure 2 It is a circuit schematic diagram of the display area of ​​the present invention.

[0012] Figure 3 It is the circuit principle diagram of the download area of ​​the present invention.

[0013] Figure 4 This is a PCB diagram of an embodiment of the present invention.

[0014] In the figure: 1. PCB board, 2. LCD liquid crystal display area, 3. Traffic light sub-board area, 4. Eight-digit running light area; 5. Single-digit digital display and eight-digit digital display area, 6. Round hole, 7. Sub-board interface area, 8. 8X8 dot matrix area, 9. Active buzzer area, 10. Single relay control area, 11. Chip and module port area, 12. USB340 download area, 13. Mainboard power supply area, 14. Voice module area, 15. Servo control area, 16. DS3231 clock area, 17. Four-digit query keyboard area. DETAILED DESCRIPTION

[0015] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0016] like Figure 4 As shown, this embodiment includes a PCB board 1 with a right-angled rectangular cross section, and support column mounting holes 6 are respectively provided at the four corners of the PCB board 1; The PCB board 1 is provided with chip and module port areas 11 for placing chips and providing interfaces and power supply to various modules.

[0017] There is an interface area 3 of the traffic light sub-board just above the PCB board 1, which is used to connect the traffic light sub-board used so as to realize a simple experiment of the traffic light.

[0018] There is an LCD display area 2 on the upper left of PCB board 1. Setting C7 (104 capacitor) and C8 (106 capacitor) at the GND and VCC power ports can filter, couple, and store energy, thereby providing a purer and more stable power supply for the display and setting an adjustable resistor to adjust the brightness of the display.

[0019] There are a single-digit digital tube display and two four-digit digital tube displays 5 in the upper right corner of the PCB board 1, and interface identifiers of the bit code and segment code of the four-digit digital tube are set, and 8 1K resistance voltage divider resistors of the single-digit digital tube are set on the back.

[0020] The rightmost side of PCB board 1 is provided with interface area 7 of the sub-board, 34-pin interface: VCC, GND, P00-P07, P10-P17, P20-P27, P30-P37 and marked with corresponding interface identification; The MCU 11 of the main control chip is set in the middle of the front of the PCB board 1, and the name of the pin corresponding to the main control chip is also marked. The mainboard area on the left side of the chip has ports for various modules. The corresponding pin identifiers are written next to the MCU pins to quickly and easily find the corresponding pins; there are 3 3-pin ports (for modules such as DS18B20); there are 3 4-pin ports (AM2302 temperature and humidity modules); there is 1 5-pin port (for modules such as XY joysticks); there is 1 6-pin port (for modules such as HC-05 Bluetooth); There is a USB340 download area 12 on the upper left side of the middle of the mainboard area of ​​the PCB board 1, which is equipped with corresponding resistors, capacitors, crystal oscillators, CH340 download chips, and SMD light emitting diodes. Its advantage is that it can be directly downloaded via a USB data cable, and the display and jumper caps of the download process of two independent SMD light emitting diodes can be downloaded with other download and burning modules; At the lower left side of the middle of the mainboard area of ​​the PCB board 1, there is a mainboard power supply area 13 electrolytic capacitors, chip capacitors, chip resistors, chip light-emitting diodes, and a separate power supply port to provide power to the board separately, and a separate power indicator light is provided; On the right side of the motherboard area, there are eight-bit running lights connected to the P2 port and the corresponding resistor row 4, P13 and P14 ports connected to the DS3231 clock chip and the corresponding CR2032 button battery 16, P10-P17 ports connected to C1-C8, P00-P07 ports connected to the 8X8 dot matrix display of R1-R8, and the corresponding interface labels are marked; A four-digit query keyboard 17 with ports P32, P33, P34, and P35 is provided directly below the PCB board.

[0021] The voice module of the P16 and P17 ports and the corresponding speaker port 14 are provided on the lower left side of the PCB board.

[0022] The lower left side of the PCB board has the servo control ports P42, P44, and P45, as well as the independently powered servo power port 15, which can support up to three servos; An active buzzer of the P55 port, a base bias resistor and a PNP transistor 9 are arranged on the lower right side of the PCB board.

[0023] A relay-controlled module 10 is provided at the lower right side of the PCB board.

[0024] The back of the PCB board has the device name printed on it and eight 102 chip resistors for the four-digit digital tube.

[0025] In addition to setting up fixed experimental contents, each module of the present invention can also combine different experimental modules to form new experimental projects. For example, the design of the drug sorting system can be completed by using the servo control area, weighing module, digital tube display area, voice module and single-chip minimum system module; the experimental design of refrigerator system control can be completed by using the temperature sensor module, LCD liquid crystal display module, voice module, refrigeration semiconductor, relay control module and single-chip minimum system module. With the help of these small projects with strong practical application background, the students' enthusiasm for learning is ignited and their enthusiasm for independent learning is fully mobilized. From a practical perspective, the students' engineering development capabilities are fully tempered, and a high-quality learning environment that encourages independent thinking, free exploration and innovation is carefully created to achieve efficient conversion and seamless connection from single single-chip knowledge to practical application.

Claims

1. The embedded teaching system device based on STC15 has the following features: the front of the PCB has various areas of the main board, including the main board area, eight-digit running lights, DS3231 clock, 8X8 dot matrix, active buzzer, relay control, active buzzer, sub-board interface, digital tube display, four-digit query keyboard, traffic light sub-board, LCD display, USB340 download, main board power supply, steering gear control, and voice module. Each part is printed with the device name printed on the top; There is an LCD display on the upper left side of the PCB: there are capacitors, LCD pins and adjustable resistors to adjust the brightness of the display; There is a port for the traffic light sub-board just above the PCB; There is a single-digit digital tube display and two four-digit digital tube displays on the upper right side of the PCB, and the interface identification of the bit code and segment code of the four-digit digital tube is set; The right side of the PCB is provided with the interface of the sub-board and has the corresponding interface mark; The main control chip is located in the middle of the front of the PCB board, and the pin names corresponding to the main control chip are also printed. The mainboard area on the left side of the chip has ports for various modules; There is a USB340 download area on the upper left side of the middle of the mainboard area, which is equipped with corresponding resistors, capacitors, crystal oscillators, CH340 download chips, and SMD light-emitting diodes; In the lower left middle of the motherboard area, there is the motherboard power supply area, power indicator light, and separate power supply port; On the right side of the motherboard area there are eight-digit running lights, a DS3231 clock chip and the corresponding battery, and an 8X8 dot matrix; There is a four-digit query keyboard directly below the PCB board; The lower left side of the PCB board is equipped with a voice module and a corresponding speaker port; The servo control and servo power ports are located on the lower left side of the PCB board; There is an active buzzer on the lower right side of the PCB board; The relay-controlled module is located on the far right bottom of the PCB board; The device name is printed on the back of the PCB.

Images