main.c

单片机的I2C通信协议

#include <avr/io.h>
#include <avr/interrupt.h>
#include <avr/signal.h>
#include <I2C.H>

void  port (void)
{
  DDRD|=(1<<PD2);    //485  cs
  PORTD&=~(1<<PD2);  
  DDRB|=(1<<PB0);    //power 灯
  PORTB&=~(1<<PB0);  
  
}

//--------------------------------------------------------------------------------------------
 main(void) 
{ 
  unsigned long int d=0,p[12],n=0,m=0;
  unsigned char aa=0,a=0,b=0,c=0,i=0;
  port();     //端口初始化
  TWCR|=5;
  TWBR=2;
  TWSR=0;
  
  sei();
   
  while(1) 
  {
  
  twi_write(0x80, 0x01);
  
  }
  
}