pcf8563._h

读写器与射频卡通信的设计采用RC522射频读写芯片与射频卡进行通信

/************************************************************************ 
//ICC-AVR application builder : 2006-8-10 下午 02:12:10   // Target : M16 
// Crystal: 8Mhz 
时钟芯片PCF8563头文件 
************************************************************************/ 

#define SDA_SET PORTC|=BIT(1);           //时钟芯片数据接口PC1 
#define SDA_CLR PORTC&=~BIT(1); 
#define CLK_SET PORTC|=BIT(0);           //时钟芯片时钟接口PC0 
#define CLK_CLR PORTC&=~BIT(0); 
#define SDA_DI_SET DDRC|=BIT(1); 
#define SDA_DI_CLR DDRC&=~BIT(1); 
#define CLK_DI_SET DDRC|=BIT(0); 
#define CLK_DI_CLR DDRC&=~BIT(0); 
#define CHECK_SDA  PINC&BIT(1) 
unsigned char miao,fen,shi,tian,yue,nian; 
unsigned char old_sec,new_sec; 
void delay_1us(void)                 //1us延时函数 
  { 
   asm("nop"); 
  } 

void delay_nus(unsigned int n)       //N us延时函数 
  { 
   unsigned int i=0; 
   for (i=0;i<n;i++) 
   delay_1us(); 
  } 
   
void delay_1ms(void)                 //1ms延时函数 
  { 
   unsigned int i; 
   for (i=0;i<1140;i++); 
  } 
   
void delay_nms(unsigned int n)       //N ms延时函数 
  { 
   unsigned int i=0; 
   for (i=0;i<n;i++) 
   delay_1ms(); 
  } 
/*void I2C_Start (void)        
{ 
          SDA_DI_SET; 
          CLK_DI_SET;               
          CLK_SET;                          
          SDA_SET;                           
          delay_nus(2);         
          SDA_CLR;                            
          delay_nus(2); 
          SDA_SET; 
} 
void I2C_Stop (void)          
{ 
         SDA_DI_SET; 
        CLK_DI_SET;                
        SDA_CLR;                          
         CLK_SET;              
         delay_nus(2); 
         SDA_SET;                        
         delay_nus(2); 
} */
unsigned char I2C_Ackn(void) 
{ 
         unsigned char errtime=255; 
         CLK_DI_SET; 
         SDA_DI_CLR;                           
         delay_nus(2);          
         while(CHECK_SDA)  
            { 
                 errtime--; 
                  if (!errtime)                          
                      { 
                      I2C_Stop(); 
                          return 0x00; 
                     } 
             }   
         CLK_SET; 
         delay_nus(2);  
         CLK_CLR;              
         delay_nus(2); 
         return 0x01;                                 
} 
void Write_I2C_Byte(unsigned char byte)     
{ 
         unsigned char i; 
         SDA_DI_SET; 
         CLK_DI_SET;                                                    
         for (i = 0; i < 8; i++)                       
     {           
                  CLK_CLR;                                 
              if((byte & 0x80))  
                    { 
                              SDA_SET; 
                    }                      
                  else  
                         { 
                                  SDA_CLR; 
                        }                                   
                  delay_nus(2); 
                    CLK_SET;                                 
             asm("nop");         
                  byte = byte << 1;                                           
         } 
         CLK_CLR;                                    
         if (I2C_Ackn()==0) delay_nus(5);                 
         CLK_CLR; 
} 
unsigned char Read_I2C_Byte(void)  
{         
         unsigned char i,buff = 0; 
         delay_nus(2); 
         CLK_DI_SET;;                                  
         SDA_DI_CLR;                            
         for (i = 0; i < 8; i++) 
                   { 
                  CLK_CLR;               
                   delay_nus(2); 
               CLK_SET;              
                    delay_nus(2); 
                    if ( CHECK_SDA) buff++; 
                   buff = (buff << 1); 
                    delay_nus(2); 
                  } 
         SDA_DI_SET; 
         CLK_DI_SET;                                
         SDA_CLR; 
         delay_nus(2); 
         CLK_SET; 
         delay_nus(2); 
         CLK_CLR;            
         return buff;                         
} 
unsigned char rtc_read(unsigned char address) 
{ 
         unsigned char d; 
        I2C_Start(); 
        Write_I2C_Byte(0xa2); 
        Write_I2C_Byte(address); 
        I2C_Start(); 
        Write_I2C_Byte(0xa3); 
        d=Read_I2C_Byte(); 
        d=d>>1; 
        I2C_Stop(); 
        return d; 
} 
void rtc_write(unsigned char address,unsigned char data1) 
{ 
          I2C_Start(); 
          Write_I2C_Byte(0xa2); 
          Write_I2C_Byte(address); 
          Write_I2C_Byte(data1); 
          I2C_Stop(); 
} 
void rtc_start(void) 
{ 
rtc_write(0,0); 
} 
void rtc_stop(void) 
{ 
rtc_write(0,0x20); 
} 
void SetPCF8563(unsigned char adds,unsigned char data) 
{ 
 CLI(); 
 rtc_stop(); 
 rtc_write(adds,data); 
 rtc_start(); 
 SEI(); 
} 
void set8563(void)        //设置时间！ 
{                         //这里就自己弄吧！我就偷懒了，呵呵！ 
  SetPCF8563(8,0x06);     //设置年 
  SetPCF8563(7,0x08);     //设置月 
  SetPCF8563(5,0x09);     //设置日 
  SetPCF8563(4,0x23);     //设置时 
  SetPCF8563(3,0x59);     //设置分 
  SetPCF8563(2,0x49);     //设置秒 
} 
void GetPCF8563()             //只需调用这个函数就可以了！（设置时间除外哦！） 
{  
  CLI();                      // 出口参数就是这些了 
  miao=(rtc_read(2)&0x7f);    //秒               
  fen=(rtc_read(3)&0x7f);     //分              
  shi=(rtc_read(4)&0x3f);     //时      
  tian=(rtc_read(5)&0x3f);         
  yue=(rtc_read(7)&0x1f);            
  nian=(rtc_read(8));         //年    
  SEI(); 
}