51 Single Chip Microcomputer Music Tutorial237

## Introduction
The 51 single chip microcomputer is a widely used microcontroller in electronic projects, and it has many functions. In addition to basic control, it can also be used to make music. This tutorial will introduce you to the basic principles of 51 single chip microcomputer music and provide you with a simple music program.
## Basic Principles of 51 Single Chip Microcomputer Music
The 51 single chip microcomputer generates music by using its timer to generate a square wave output. The frequency of the square wave determines the pitch of the sound, and the duty cycle of the square wave determines the timbre of the sound. By changing the frequency and duty cycle of the square wave, the 51 single chip microcomputer can generate a variety of different sounds.
## Hardware Connection
To make music with a 51 single chip microcomputer, you will need the following hardware:
* 51 single chip microcomputer
* Speaker
* Resistor (10kΩ)
The hardware connection is very simple. Connect one end of the resistor to P1.0 port of the 51 single chip microcomputer, and the other end to the positive terminal of the speaker. Connect the negative terminal of the speaker to GND.
## Software Program
The following is a simple music program for the 51 single chip microcomputer:
```
#include
void main()
{
while (1)
{
P1 = 0x01; // Output 11111111 to P1 port
TH0 = 0x00; // Set high byte of timer0 reload value to 0
TL0 = 0x00; // Set low byte of timer0 reload value to 0
TR0 = 1; // Start timer0
while (!(TF0)); // Wait for timer0 overflow
TR0 = 0; // Stop timer0
TF0 = 0; // Clear timer0 overflow flag
P1 = 0x00; // Output 00000000 to P1 port
TH0 = 0x00; // Set high byte of timer0 reload value to 0
TL0 = 0x00; // Set low byte of timer0 reload value to 0
TR0 = 1; // Start timer0
while (!(TF0)); // Wait for timer0 overflow
TR0 = 0; // Stop timer0
TF0 = 0; // Clear timer0 overflow flag
}
}
```
This program will generate a square wave with a frequency of about 1 kHz and a duty cycle of 50%. You can change the frequency and duty cycle of the square wave by changing the values of TH0 and TL0.
## Conclusion
This tutorial has introduced you to the basic principles of 51 single chip microcomputer music and provided you with a simple music program. With a little creativity, you can use the 51 single chip microcomputer to make a variety of different sounds and songs.

2024-12-04

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