C code for making eye-activating instrument with single-chip microcomputer

This is a complete code of the eye-activating instrument made with 51 series single-chip microcomputer. Friends who need it can take a look. The code has been tested successfully.
/*
Project name: Single-chip eye-activating instrument
Related knowledge points: single-chip microcomputer drives heating devices, digital tube display, key operation, etc.
Program development: http://www.51hei.com single-chip microcomputer tutorial website.
*/
#include
#define uint unsigned int
#define uchar unsigned char
#define duan P0 // Define the segment display of P1 port as duan label
#define keyio P3 // Set P3 port as the port for key detection

uchar time,guannum,guantime1,guantime2; //time is the value in minutes, light displays the time value
uint b; //50MS is 1 time, so 1 minute is 1200 times
bit xsd,onandoff; //decimal point flashing bit variable, switch variable flag bit

sbit xuanled=P2^3;
sbit guanled=P2^5;
sbit rfled=P2^7;//Three indicator light position control
sbit xsdbit=P0^6;//Decimal point actual hardware output pin definition
sbit gewela=P2^0;//Ones digit digital tube position control
sbit shiwela=P2^1;//Tens digit digital tube lock position control
sbit guanout=P1^0;//Spectrum output
sbit rfout=P1^1; //RF heating head output drive
sbit xuanout=P1^2; //Gyromagnetic output
sbit fmqout=P1^3;

uchar code tab[]={0x48,0xee,0x54,0x64,0xe2,0x61,0x41,0xec,0x40,0x60,0xf7};//Digital tube segment display code 0~9, to be written
void chushi(void); //Initialize when entering the main function
void key(void); //Key detection
void display(uchar time);//Digital tube display processing program
void chushi1(void); //Perform large loop function initialization processing

void delay(uchar num)//delay module program
{
uchar c,d;
for(c=num;c>0;c--)
for(d=40;d>0;d--);
}

void main() //Main function program body
{
uchar a;
chushi();

while(1)
{
chushi1();
key(); //Key detectionif
(keyio!=0xff)
fmqout=0;
else fmqout=1;
if(onandoff!=0)
{
for(a=100;a>0;a--)
{
duan=tab[10]; //Open segment display, display the middle segment
gewela=0;
shiwela=0;
delay(10);
gewela=1;
shiwela=1;
}

while(onandoff!=0)
{
display(time);
key();
if(time==0&&b>=1000)
fmqout=xsd;
else if(keyio==0xff)
fmqout=1;
else fmqout=0;

}
for(a=200;a>0;a--)
display(time);
}
}

}

void time0() interrupt 1
{
TH0=0x3c;
TL0=0xb0;
b++;
if(b==1200)
{
b=0;
if(time!=0)
time--;
else onandoff=0; //set zero flag
}

if(b%10==0)
xsd=~xsd; //The decimal point variable changes in a cycle of 1S
if(guannum==2||guannum==3)
{
guantime2--;
if(guantime2==0)
{
guantime2=guantime1;
guanout=~guanout;
}
}
}[page]

void chushi(void) //Initialize directly when entering the main MAIN function body
{
TMOD=0x01; //Timer timing mode
TH0=0x3c;
TL0=0xb0;
ET0=1;
EA=1;
TR0=1;
xuanled=1;
guanled=1;
rfled=1;
}

void chushi1(void) //Initialization of the large loop
{
time=30; //The initial time value is 30 minutes when the machine is turned on

guanout=0; //Spectrum output is low level
rfout=0; //RF heating head output drive is low level
xuanout=0; //Gyromagnetic output low level
guannum=0; //When in standby mode, the spectrum is in 0 state

xuanled=1;
guanled=1;
rfled=1;

duan=tab[10]; //Open segment display, display the middle segment
gewela=0;
shiwela=0;
delay(2);
gewela=1;
shiwela=1;
}

void key(void) //Key detection module
{
uchar a,num1;
keyio=0xff;
if(keyio!=0xff)
{
fmqout=0;
if(onandoff!=0)
{
for(a=100;a>0;a--)
display(time);
}
else
{ for(a=20;a>0;a--)
{
duan=tab[10]; //Open segment display, display the middle segment
gewela=0;
shiwela=0;
delay(2);
gewela=1;
shiwela=1;
}
}
if(keyio!=0xff)
{
num1=keyio;
switch(num1)
{
case 0xfe: onandoff=~onandoff; //Switch on and off
break;

case 0xfd: b=0;
if((onandoff!=0)&&(time!=99)) //time plus
time++;
break;

case 0xfb: b=0;
if((onandoff!=0)&&(time!=0)) //time minus
time--;
break;

case 0xf7: if(onandoff!=0)
{
xuanout=~xuanout; //rotation variable changeif
(xuanout!=0)
xuanled=0;
else xuanled=1;
}
break;

case 0xef: if(onandoff!=0) //spectral output variable changes
{
guannum++;
if(guannum==4)
guannum=0;

if(guannum!=0)
guanled=0;
else guanled=1;

if(guannum==1)
guanout=1;
else if(guannum==2)
guantime1=guantime2=15;
else if(guannum==3)
guantime1 =guantime2=8;
else guanout=0;

}
break;
case 0xdf: if(onandoff!=0) //RF heating variable changes
{
rfout=~rfout;
if(rfout!=0)
rfled=0;
else rfled=1;
}
break;
default:break;

}
}

}
}

void display(uchar min) //digital tube display module
{
uchar ge,shi;
shi=min/10;
ge=min%10;

duan=tab[shi];
shiwela=0;
delay(5);
shiwela=1;

duan=tab[ge];
xsdbit=xsd;
gewela=0;
delay(5);
gewela=1;
}