C language programming of 24C08 data operation based on AVR microcontroller

#include
#define uint unsigned int
#define uchar unsigned char
#include "I2C_drive.h" //Includes the I2C bus driver software package
uchar const seg_data[]={0xC0,0xF9,0xA4,0xB0,0x99,0x92,0x82,0xF8,0x80,0x90,0xff}; //Segment table for 0~9 and the extinguisher
uchar const bit_tab[]={0xbf,0x7f}; //Bit selection table for the 7th and 8th digital tubes
uchar disp_buf[2]={0,0}; //Define 2 display buffer units
uchar val;
#define beep_0 (PORTD=PORTD&0xbf) //The buzzer on PD7 sounds
#define beep_1 (PORTD=PORTD|0x40) //The buzzer on PD7 does not sound
/********Function: Delay function********/
void Delay_ms(uint xms)
{
  int i,j;
  for(i=0;i   { for(j=0;j<1140;j++) ; }
}
/*********The following is a function for the buzzer to sound********/
void beep()
{
uint bb;
for (bb=0;bb<20;bb++)
{
  beep_0; //The buzzer sounds
  Delay_ms(1); 
  beep_1; //Turn off the buzzer
  Delay_ms(1);  
  }  
}
/********Port setting function********/
void port_init(void)
{
 PORTA = 0xFF; //Output high level
 DDRA = 0xFF; //Set to output
 PORTC = 0xff; //Output high level
 DDRC = 0xFF; //Set to output
 DDRD =(0<  PORTD = 0xFF; //PD6 outputs high level, others are inputs with pull-up
}
/********Timer 0 initialization********/
void timer0_init()
{
 SREG = 0x80; //Enable global interrupt
 TIMSK|=(1<  TCCR0|=(1<  TCNT0 = 240; //Timing initial value setting, timing time 2ms
}
/********The following is the display function********/
void Display()
{
 uchar tmp; //Define display temporary storage
 static uchar disp_sel=0; //Display bit select counter, the display program uses it to know which digital tube is currently displayed, the initial value is 0
 tmp=bit_tab[disp_sel]; //Determine which digital tube to display based on the current bit select count value
 PORTC=tmp; //Send to PC to control the selected digital tube to light up
 tmp=disp_buf[disp_sel]; //Look up the display code of the number based on the current bit select count value
 tmp=seg_data[tmp]; //Get the display code
 PORTA=tmp; //Send to PA port to display the corresponding number
 disp_sel++; //Add 1 to the bit select count value and point to the next digital tube
 if (disp_sel==2)   
 disp_sel=0; //If 2 digital tubes are displayed once, return them to 0 and scan again

}
/********The following is the timer T0 interrupt function, used for dynamic scanning of the digital tube********/
#pragma interrupt_handler timer0_ovf:10
void timer0_ovf(void)
{
  TIFR=0x01; //Write 1 to clear the timer T0 flag
 TCNT0=240; //Set the initial count value and set the timing time to 2ms
 Display(); //Call the display function
}

/********The following is the main function********/
void main()
{
 timer0_init();
 I2C_init();
 port_init();
 Delay_ms(100);
 val=read_EEPROM(0x02);
 
 if(val>=100) val=0; //Prevent errors when reading EEPROM data for the first time
 while(1)
 { 
  
  if((PIND&0x04)==0) //If K1 key is pressed
  {
   Delay_ms(10); //Delay 10ms to debounce
   if((PIND&0x04)==0)
 
   {
    while(!(PIND&0x04)); //Wait for K1 key to be released
    val++;
    write_EEPROM(val,0x02);
    beep();
    if(val==99)val=0;
   }
  }
  disp_buf[0]=val/10;
   disp_buf[1]=val%10; 
 }
}