MCU music player C language program

#include 
#define uchar unsigned char
#define uint unsigned int
 
sbit speaker = P1^7;
uchar t0h,t0l,time;
//-----------------------------------------
//The MCU crystal oscillator uses 11.0592MHz
// Frequency-half-cycle data table high eight bits This software saves a total of 28 frequency data of four octaves
uchar code FREQH[] = {0x01, //No note when 0
    0xF2, 0xF3, 0xF5, 0xF5, 0xF6, 0xF7, 0xF8, //Bass 1234567
    0xF9, 0xF9, 0xFA, 0xFA, 0xFB, 0xFB, 0xFC, 0xFC,//1,2,3,4,5,6,7,i
    0xFC, 0xFD, 0xFD, 0xFD, 0xFD, 0xFE, // high pitch 234567
    0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFF}; //Super treble 1234567
//----------------------------------------
// Frequency-half-cycle data table lower eight bits
uchar code FREQL[] = {0x01, //No note when 0
    0x42, 0xC1, 0x17, 0xB6, 0xD0, 0xD1, 0xB6, //Bass 1234567
    0x21, 0xE1, 0x8C, 0xD8, 0x68, 0xE9, 0x5B, 0x8F, //1,2,3,4,5,6,7,i
    0xEE, 0x44, 0x6B, 0xB4, 0xF4, 0x2D, ​​// high pitch 234567
    0x47, 0x77, 0xA2, 0xB6, 0xDA, 0xFA, 0x16}; //Super high pitch 1234567
//-----------------------------------------
//A note has three numbers. The first one is the note number, the middle one is the octave, and the last one is the duration (in 1/4 beats).
//6, 2, 6 represent: 6, middle note, 6 1/4 beats;
//5, 2, 2 represent: 5, middle note, 2 1/4 beats;
//3, 2, 4 represent: 3, middle note, 4 1/4 beats;
//5, 2, 4 represent: 5, middle note, 4 1/4 beats;
//1, 3, 4 represent: 1, high note, 4 1/4 beats;
//Bass is 1, midrange is 2, treble is 3, and super treble is 4;
///////////////////////////////////////////////////// ////////
/************************There is only one good mother in the world************************/
uchar code sszymmh[] = {
 6,2,6, 5,2,2, 3,2,4, 5,2,4,
 1,3,4, 6,2,2, 5,2,2, 6,2,8,
 3,2,4, 5,2,2, 6,2,2, 5,2,4,
 3,2,4, 1,2,2, 6,1,2, 5,2,2,
 3,2,2, 2,2,8, 2,2,6, 3,2,2,
 5,2,4, 5,2,2, 6,2,2, 3,2,4,
 2,2,4, 1,2,8, 5,2,6, 3,2,2,
 2,2,2, 1,2,2, 6,1,2, 1,2,2,
 5,1,16, 0,0,0};
/**********************Two mice*************************/
uchar code TwoMouse[]={
 3,2,2, 6,2,2, 7,2,2, 5,2,2,
 3,2,2, 6,2,2, 7,2,2, 5,2,2,
 7,2,2, 1,3,2, 2,3,4,
 7,2,2, 1,3,2, 2,3,4,
 2,3,1, 3,3,1, 2,3,1, 1,3,1, 7,2,2, 5,2,2,
 2,3,1, 3,3,1, 2,3,1, 1,3,1, 7,2,2, 5,2,2,
 6,2,2, 2,2,2, 5,2,4, 6,2,2, 2,2,2, 5,2,4,
 0,0,0};
/***********************Two butterflies**********************/
uchar code TwoButterfly[]={
 3,2,2, 2,2,2, 3,2,6, 3,2,2, 3,2,2, 2,2,2,
 1,2,6, 6,1,2, 1,2,2, 2,2,4, 2,2,2, 3,2,2,
 2,2,2, 1,2,2, 6,1,2, 1,2,2, 5,1,12,3,2,2,
 2,2,2, 3,2,8, 3,2,2, 2,2,2, 3,2,2, 3,2,2,
 1,2,12,6,1,2, 1,2,2, 2,2,4, 2,2,2, 3,2,2,
 2,2,2, 1,2,2, 6,1,2, 1,2,2, 2,2,12,3,2,2,
 2,2,2, 3,2,8, 3,2,2, 2,2,2, 3,2,2, 2,2,2,
 1,2,12,6,1,2, 1,2,2, 2,2,4, 2,2,2, 3,2,2,
 2,2,2, 1,2,2, 6,1,2, 1,2,2, 5,2,12,3,2,2,
 5,2,2, 5,2,8, 5,2,2, 5,2,2, 6,2,2, 5,2,2,
 3,2,12,2,2,2, 3,2,2, 2,2,4, 2,2,2, 3,2,2,
 2,2,2, 1,2,2, 6,1,2, 6,1,1, 1,2,1, 1,2,1,
 1,2,1, 1,2,12,0,0,4, 5,2,2, 5,2,2, 6,2,2,
 1,3,2, 7,2,2, 7,2,2, 6,2,2, 3,2,2, 2,2,2,
 2,2,2, 3,2,2, 3,2,8, 3,2,2, 3,2,2,
 5,2,2, 6,2,4, 6,2,6, 6,1,2, 3,2,2, 2,2,2,
 2,2,12,3,2,2, 5,2,2, 5,2,2, 3,2,2, 5,2,4,
 1,3,4, 7,2,2, 6,2,2, 7,2,2, 3,2,4,
 6,2,2, 6,2,2, 7,2,2, 6,2,2, 5,2,2,
 3,2,2, 2,2,4, 3,2,2, 2,2,2, 3,2,2, 5,2,6,
 5,2,2, 5,2,2, 6,2,2, 6,2,2, 5,2,2,
 3,2,2, 2,2,4, 5,1,2, 5,1,2, 6,1,2, 1,2,12,
 0,0,0};
/**********************happy birthday************************/
uchar code Birthday[]={
 5,1,2, 5,1,2, 6,1,4, 5,1,4, 1,2,4, 7,1,8,
 5,1,2, 5,1,2, 6,1,4, 5,1,4, 2,2,4, 1,2,8,
 5,1,2, 5,1,2, 5,2,4, 3,2,4, 1,2,4, 7,1,4,
 6,1,4, 4,2,2, 4,2,2, 3,2,4, 1,2,4, 2,2,4,
 1,2,4, 0,0,0};
 
///////////////////////////////////////////////////// //////
//------------------------------------------------ -----
void t0int() interrupt 1 //T0 interrupt program, control the tone of pronunciation
{
    TR0 = 0; //Close T0 first
    speaker = ~speaker; //output square wave, pronunciation
    TH0 = t0h; //The next interruption time, this time, controls the pitch
    TL0 = t0l;
    TR0 = 1; //Start T0
}
//-----------------------------------------
void delay(uchar t) //delay program, control the pronunciation time length 120ms (1/4 beat)
{
 uchar a,b,c;
    while(t--) //Quadruple loop, total delay t 1/4 beats
 {         
     for(c=193;c>0;c--)
         for(b=114;b>0;b--)
             for(a=1;a>0;a--);
 }
  //During the delay period, you can enter T0 interrupt to pronounce
    TR0 = 0; //Turn off T0, stop pronunciation
}
//-----------------------------------------
void singachar() //play a note
{
 TR0=0;
    TH0 = t0h; //Control tone
    TL0 = t0l;
    TR0 = 1; //Start T0, and T0 outputs square wave to pronounce
    delay(time); //Control the time length, i.e. the beat
}
//-----------------------------------------
//**************Play a song***********************************//
void song(uchar *str)
{
 uchar k,i;
 i = 0;
    time = 1;
    while(time)
 {
        k = str[i] + 7 * (str[i + 1]); //The i-th is a note, the i+1th is the octave

        t0h = FREQH[k]; //Read the frequency value from the data table
        t0l = FREQL[k]; //Actually, it is the time length of the timing
        time = str[i + 2]; //Read the time length value beat time
        i += 3;
        singachar();
 }
}
void main(void)
{
    TMOD = 0x01; //Set T0 timing working mode 1
    ET0 = 1; //Open T0 interrupt
    EA = 1; // Enable CPU interrupt
    while(1)
 {
  song(TwoMouse);
  delay(20);
  song(sszymmh);
  delay(20);
// song(TwoButterfly);
  song(Birthday);
  delay(20);
 }
                 //Play a note
}

/****************Music score beats, high and low notes***********************************
Beat: Two horizontal bars below indicate a quarter beat; one horizontal bar below indicates a half beat; a dot at the end indicates adding half the beat of the note;
2 indicates one beat, 2- indicates two beats; 2--- indicates four beats
Pitch: A dot above indicates a high note, a dot below indicates a low note, usually indicating a middle note;
set the beat speed to 125 beats/minute, then 2.08/beat, two beats are 960ms, one beat is 0.48s, and 1/4 beat is 120ms
*************************************************************/