signallight.c

基于atmega128的交通信号灯控制程序

#include <iom128v.h>
#include <macros.h>
#include "init.h"

void IC8255_Init(void)
{

   PORTG&=0xe3;    
   PORTE|=0x0c;
   DDRA=0xff;        
   PORTA=0x89;
   PORTG&=~BIT(0);   
   PORTG|=BIT(0);
   PORTG|=0x1c;   
   
   
   PORTG&=0xef;  
   PORTE|=0x0c;
   DDRB=0xff;         
   PORTB=0x89;
   PORTG&=~BIT(0); 
   PORTG|=BIT(0);
   PORTG|=0x1c;   
   

   PORTG&=0xe7;   
   PORTE|=0x0c;
   DDRC=0xff;        
   PORTC=0x89;
   PORTG&=~BIT(0);
   PORTG|=BIT(0);
   PORTG|=0x1c;  
   
  
   PORTG&=0xeb;  
   PORTE|=0x0c;
   DDRF=0xff;      
   PORTF=0x89;
   PORTG&=~BIT(0);  
   PORTG|=BIT(0);
   PORTG|=0x1c; 
}

void Signal_Light_State(unsigned char * temp)       
{  	   

      PORTG&=0xe3;    
      PORTE&=0xf3;
      DDRA=0xff;         
      PORTA=* temp++;
      PORTG&=~BIT(0);   
      PORTG|=BIT(0);
      PORTG|=0x1c;  
   
      PORTG&=0xe3;   
      PORTE|=BIT(2);
      PORTE&=~BIT(3);
      DDRA=0xff;         
      PORTA=* temp++;
      PORTG&=~BIT(0);  
      PORTG|=BIT(0);
      PORTG|=0x1c;   

      PORTG&=0xe7;    
      PORTE&=0xf3;
      DDRC=0xff;         
      PORTC=* temp++;
      PORTG&=~BIT(0);   //发送写脉冲
      PORTG|=BIT(0);
      PORTG|=0x1c;   //置CS为高电平
   
      PORTG&=0xe7;    
      PORTE|=BIT(2);
      PORTE&=~BIT(3);
      DDRC=0xff;         
      PORTC=* temp++;
      PORTG&=~BIT(0);   //发送写脉冲
      PORTG|=BIT(0);
      PORTG|=0x1c;   //置CS为高电平

      PORTG&=0xeb;   
      PORTE&=0xf3;
      DDRF=0xff;         
      PORTF=* temp++;
      PORTG&=~BIT(0);   //发送写脉冲
      PORTG|=BIT(0);
      PORTG|=0x1c;   //置CS为高电平
   
      PORTG&=0xeb;    
      PORTE|=BIT(2);
      PORTE&=~BIT(3);
      DDRF=0xff;         
      PORTF=* temp++;
      PORTG&=~BIT(0);   //发送写脉冲
      PORTG|=BIT(0);
      PORTG|=0x1c;   //置CS为高电平

      PORTG&=0xef;    
      PORTE&=0xf3;
      DDRB=0xff;         
      PORTB=* temp++;
      PORTG&=~BIT(0);   //发送写脉冲
      PORTG|=BIT(0);
      PORTG|=0x1c;   //置CS为高电平
   
      PORTG&=0xef;    
      PORTE|=BIT(2);
      PORTE&=~BIT(3);
      DDRB=0xff;         
      PORTB=* temp++;
      PORTG&=~BIT(0);   //发送写脉冲
      PORTG|=BIT(0);
      PORTG|=0x1c;   //置CS为高电平
}   
		   
void Read8255_PortC()
{
  
	  PORTG&=0xe3;    
      PORTE&=~BIT(2);
	  PORTE|=BIT(3); 
      DDRA=0;        
      PORTG&=~BIT(1);   //发送读脉冲
	  Delay_us(20);
	  Portc[0]=PINA;
	  PORTG|=BIT(1);
      PORTG|=0x1c;   //置CS为高电平
 
	  PORTG&=0xe7;   
      PORTE&=~BIT(2);
	  PORTE|=BIT(3);
      DDRC=0;        
      PORTG&=~BIT(1);   //发送读脉冲
	  Delay_us(20);
	  Portc[1]=PINC;
	  PORTG|=BIT(1);
      PORTG|=0x1c;   //置CS为高电平

	  PORTG&=0xeb;    
      PORTE&=~BIT(2);
	  PORTE|=BIT(3);
      DDRF=0;        
      PORTG&=~BIT(1);   //发送读脉冲
	  Portc[2]=PINF;
	  PORTG|=BIT(1);
      PORTG|=0x1c;   //置CS为高电平
  
	  PORTG&=0xef;    
      PORTE&=~BIT(2);
	  PORTE|=BIT(3);  
      DDRB=0;       
      PORTG&=~BIT(1);   //发送读脉冲
	  Delay_us(20);
	  Portc[3]=PINB;
	  PORTG|=BIT(1);
      PORTG|=0x1c;   //置CS为高电平  
}