roboforum.ru

#include <mega8.h>

// I2C Bus functions
#asm
   .equ __i2c_port=0x18 ;PORTB
   .equ __sda_bit=2
   .equ __scl_bit=1
#endasm
#include <i2c.h>   


// Standard Input/Output functions
#include <stdio.h>
#include <delay.h>
#define adress_write 0x42
#define adress_read 0x43
// Declare your global variables here
usart_write(char byte)
{
while(!(UCSRA & (1<<5)))
{
}
UDR=byte;

}

i2c_re()
{
i2c_start();
i2c_write(adress_write);
i2c_write(0x41);
delay_ms(10);
i2c_start();
i2c_write(adress_read);
usart_write(i2c_read(1));
usart_write(i2c_read(0));
i2c_stop();
}


void main(void)
{
PORTB=0x00;
DDRB=0x00;
DDRB.0=1;
PORTB.0=1;
PORTC=0x00;
DDRC=0x00;
PORTD=0x00;
DDRD=0x00;
TCCR0=0x00;
TCNT0=0x00;
TCCR1A=0x00;
TCCR1B=0x00;
TCNT1H=0x00;
TCNT1L=0x00;
ICR1H=0x00;
ICR1L=0x00;
OCR1AH=0x00;
OCR1AL=0x00;
OCR1BH=0x00;
OCR1BL=0x00;
ASSR=0x00;
TCCR2=0x00;
TCNT2=0x00;
OCR2=0x00;
TIMSK=0x00;
UCSRA=0x00;
UCSRB=0x08;
UCSRC=0x86;
UBRRH=0x00;
UBRRL=0x33;

// Analog Comparator initialization
// Analog Comparator: Off
// Analog Comparator Input Capture by Timer/Counter 1: Off
ACSR=0x80;
SFIOR=0x00;

// I2C Bus initialization
i2c_init();
usart_write('C');
usart_write('O');
usart_write('n');
usart_write('n');
usart_write('e');
usart_write('c');
usart_write('t');
usart_write(' ');
usart_write('O');
usart_write('k');

while (1)
      {
PORTB.0=~PORTB.0;
i2c_re();
delay_ms(1000);
      };
}