This design includes Proteus simulation, program, design report, and explanatory video.
1. Development Environment
Simulation Diagram: Proteus 8.17 (lower versions available)
Program Compiler: Keil 4/Keil 5
Programming Language: C
Design Number: P23
2. Main Functions:
Design an electronic piano. Using the provided keyboard with keys 1, 2, 3, 4, 5, 6, 7, and 8, it can produce 8 different tones. It is required that pressing a key produces sound, and releasing it stops the sound after a delay, allowing another key to be pressed to produce a different tone.
When the system detects a key pressed on the keyboard, it quickly identifies which key is pressed, then the microcontroller’s timer is activated to emit a pulse at a certain frequency. This frequency pulse, when input to the buzzer, will produce the corresponding tone. If another key is pressed while the previous key is still sounding, the interrupt system is activated, stopping the sound of the previously pressed key and switching to the sound program of the later pressed key.
The difficulty of this project lies in implementing music playback, which can be achieved using a timer counter. By loading different initial count values, square waves of different frequencies can be generated and input to the buzzer (SOUNDER) to produce sounds of varying frequencies. In this design, the microcontroller’s crystal oscillator is 11.0592MHz. By calculating the frequencies of each musical scale, we can assign the initial values for the timer to 64580, 64684, 64777, 64820, 64898, 64968, 65030, and 64655 for the 7 tones.
Main Hardware: 51 Microcontroller, Digital Tube, Independent Keys
(Currently fully compatible with the PuZhong 51 Experiment Board 234; other PuZhong development board models require wiring.)
Note that the 51 microcontroller chip in the simulation is compatible; AT89C51 and AT89C52 are specific models of the 51 microcontroller, with the same core. In the same schematic, whether STC or AT, the pin functions are the same, the programs are compatible, and the chips can be replaced with STC89C52/STC89C51/AT89C52/AT89C51 and other 51 microcontroller chips.
Download Link for Materials:
P Series Microcontroller Design Download Link (copy to browser to open)
https://docs.qq.com/doc/DS2pPenNRaHB6SlR1
The following are display images of the design materials:
3. Physical Images:
4. Simulation Design
Open the simulation project, double-click the microcontroller in Proteus, select the hex file path, and then start the simulation.
At the beginning of the simulation, the first digit of the digital tube displays 8.
When key 1 DO is pressed, the digital tube displays 1, and the buzzer emits the audio DO. When the key is released, the sound stops.
When key 7 XI is pressed, the digital tube displays 7, and the buzzer emits the audio XI. When the key is released, the sound stops.
5. Program Code
Use Keil 4 or Keil 5 to compile. The code is commented, and you can understand the meaning of the code in conjunction with the video.
6. Design Report
8261-word design report, including hardware design, software design, soft and hardware block diagrams, debugging, conclusions, etc.
7. List of Design Materials & Download Links
The design materials include simulation, program code, explanatory video, functional requirements, design report, and soft and hardware design block diagrams.
0. Common usage issues and solutions – must read!!!!
1. Program
2. Proteus simulation
3. Functional requirements
4. Soft and hardware flowcharts
5. Project proposal
6. Design report
7. Programming tools
8. Explanatory video
9. Physical images
Altium Designer installation and cracking
KEIL + Proteus microcontroller simulation design tutorial
KEIL installation and cracking
Proteus component search
Proteus installation
Proteus simple usage tutorial
Microcontroller learning materials
Relevant data sheets
Defense skills
Common descriptions in design reports
Double-click to open and find the Jiasheng microcontroller 51 STM32 microcontroller course graduation design.url
Download link for materials:
https://docs.qq.com/doc/DS2pPenNRaHB6SlR1
More resources click the link below:
https://docs.qq.com/sheet/DS0xIa0llTmtNakRW
WeChat Official Account
Jiasheng Microcontroller
Website｜www.eemcu.cn
