I2C EXAMPLE -II WITH 24C256, ATMEGA16 CODEVISION

PUSH BUTTON ON PORT B

INCREMENTING TWO VAIBALES AND SAVED
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#include mega16.h
#include delay.h
#include stdio.h
// I2C Bus functions
#asm
   .equ __i2c_port=0x12 ;PORTD
   .equ __sda_bit=3
   .equ __scl_bit=2
#endasm
#include
#asm
   .equ __lcd_port=0x15 ;PORTC
#endasm
#include
// Declare your global variables here
unsigned char read_byte (unsigned int address);    
void write_byte (unsigned char data_out, unsigned int address);
void READ_FREQ_COUNTER(void);   
void READ_PC_COUNTER(void);  
void WRITE_TO_EEPROM(void);
unsigned int FREQ_COUNTER=1;
unsigned int PC_COUNTER=3;
void main(void)
{
unsigned char b[20];
// Declare your local variables here

// Input/Output Ports initialization
// Port A initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T
PORTA=0x00;
DDRA=0x00;

// Port B initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T
PORTB=0xff;
DDRB=0x00;

// Port C initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T
PORTC=0x00;
DDRC=0xff;

// Port D initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T
PORTD=0x00;
DDRD=0xff;

// Timer/Counter 0 initialization
// Clock source: System Clock
// Clock value: Timer 0 Stopped
// Mode: Normal top=FFh
// OC0 output: Disconnected
TCCR0=0x00;
TCNT0=0x00;
OCR0=0x00;

// Timer/Counter 1 initialization
// Clock source: System Clock
// Clock value: Timer1 Stopped
// Mode: Normal top=FFFFh
// OC1A output: Discon.
// OC1B output: Discon.
// Noise Canceler: Off
// Input Capture on Falling Edge
// Timer1 Overflow Interrupt: Off
// Input Capture Interrupt: Off
// Compare A Match Interrupt: Off
// Compare B Match Interrupt: Off
TCCR1A=0x00;
TCCR1B=0x00;
TCNT1H=0x00;
TCNT1L=0x00;
ICR1H=0x00;
ICR1L=0x00;
OCR1AH=0x00;
OCR1AL=0x00;
OCR1BH=0x00;
OCR1BL=0x00;

// Timer/Counter 2 initialization
// Clock source: System Clock
// Clock value: Timer2 Stopped
// Mode: Normal top=FFh
// OC2 output: Disconnected
ASSR=0x00;
TCCR2=0x00;
TCNT2=0x00;
OCR2=0x00;

// External Interrupt(s) initialization
// INT0: Off
// INT1: Off
// INT2: Off
MCUCR=0x00;
MCUCSR=0x00;

// Timer(s)/Counter(s) Interrupt(s) initialization
TIMSK=0x00;

// Analog Comparator initialization
// Analog Comparator: Off
// Analog Comparator Input Capture by Timer/Counter 1: Off
ACSR=0x80;
SFIOR=0x00;
PORTD.2=0;
PORTD.3=0;
// I2C Bus initialization
i2c_init();

READ_PC_COUNTER();
delay_ms(200);
READ_FREQ_COUNTER(); 

sprintf(b,"FREQ - %u ,PC - %u",FREQ_COUNTER,PC_COUNTER) ;
lcd_init(40);
lcd_clear();
lcd_putsf("ETM");
delay_ms(2000);
while (1)
      {
        
        sprintf(b,"FREQ - %u ,PC - %u",FREQ_COUNTER,PC_COUNTER) ;
        lcd_clear();
        lcd_puts(b);        
       
          if (PINB.1 == 0)
          {
             FREQ_COUNTER++;
             WRITE_TO_EEPROM();
             delay_ms(200);
          }
            
         
           if (PINB.2 == 0)
          {
              PC_COUNTER++;
             WRITE_TO_EEPROM();
             delay_ms(200);
          }  
          
           if (PINB.3 == 0)
          {
               READ_FREQ_COUNTER();
               READ_PC_COUNTER();
                delay_ms(200);
          }  
         
         delay_ms(600);
      };
}




void WRITE_TO_EEPROM()
{
i2c_start();
i2c_write(0xA0);    
i2c_write(0x00);    
i2c_write((unsigned char)FREQ_COUNTER);
i2c_write((unsigned char)PC_COUNTER);   
i2c_stop();
}

void READ_FREQ_COUNTER()
{
i2c_start();
i2c_write(0xA0);    
i2c_write(0x00);
i2c_start();
i2c_write(0xA1);         
FREQ_COUNTER = i2c_read(0);
PC_COUNTER = i2c_read(0); 
//   eeprom_address = i2c_read(0); 
//    sprintf(b,"EE - %u , %u",i2c_read(0x00), i2c_read(0x00)) ;
i2c_stop();
}


void READ_PC_COUNTER()
{
i2c_start();
i2c_write(0xA0);    
i2c_write(0x01);
i2c_start();
i2c_write(0xA1);         
//  eeprom_address1 = i2c_read(0);
PC_COUNTER = i2c_read(0); 
//    sprintf(b,"EE - %u , %u",i2c_read(0x00), i2c_read(0x00)) ;
i2c_stop();
}