x1228rw.h

x1288读写时序 0xDE 写ccr阵列

//0xDE 写ccr阵列，　0xDF 读ccr阵列
//0xAE 写eeprom阵列，0xAF 读eeprom阵列　(0x0000---0x1FF)共512个字节

//P5.7--SCL  BIT7
//P5.6--SDA  BIT6
//****
//================================================================================================================
void w128xl(unsigned char sjdz,unsigned char zdz1,unsigned char zdz0,unsigned char *w128tp,unsigned char w128zjs);
void r128xl(unsigned char sjdz,unsigned char zdz1,unsigned char zdz0,unsigned char *r128tp,unsigned char r128zjs);
//================================================================================================================
//****
void w_ack(void);
void start();
void stop();
unsigned char r_ack(void) ;
void w1_byte(unsigned char w128_dat);
unsigned char r1_byte(void);


//==========================================================================
//
void start()
{ 
  P5DIR|=BIT6;  //SDA输出功能
  P5OUT|=BIT7;  //SCL 1
  P5OUT&=~BIT6; //SDA 1->0
  P5OUT&=~BIT7; //SCL 0
}

//
//
void stop()
{ 
  P5DIR|=BIT6;  //SDA输出功能
  P5OUT&=~BIT7; //SCL 0
  P5OUT&=~BIT6; //SDA 0
  P5OUT|=BIT7;  //SCL 1
  P5OUT|=BIT6; //SDA 0->1
  
}

//============================================================================
void w_ack(void)
{
  P5DIR|=BIT6;    //SDA输出功能
  P5OUT&=~BIT6;   //SDA 0
  P5OUT|=BIT7;    //SCL 1
  P5OUT&=~BIT7;   //SCL 0  
}

//==============================================================================
//
void w1_byte(unsigned char w128_dat)
{ 
  unsigned char w_bit;
  P5DIR|=BIT6;          //SDA输出功能
  for(w_bit=8;w_bit>0;w_bit--)
    {
      if(w128_dat&BIT7)
        {
          P5OUT|=BIT6;  //SDA 1
          P5OUT|=BIT7;  //SCL 1
          P5OUT&=~BIT7; //SCL 0
        } 
      else
        { 
          P5OUT&=~BIT6; //SDA0
          P5OUT|=BIT7;  //SCL 1
          P5OUT&=~BIT7; //SCL 0
    
        }
      w128_dat=w128_dat<<1;  
    }
  P5OUT|=BIT6;  //SDA 1 释放SDA总线
}

//=============================================================================
//读从机是否有应答
unsigned char r_ack(void) 
{
  P5DIR&=~BIT6;       //SDA输入功能
  
  P5OUT|=BIT7;        //SCL 1
  
  if(P5IN&BIT6)
    {
      
      P5OUT&=~BIT7;  //SCL 0
      
      return(1);     //无应答返回1
    }
  else
    {
     
      P5OUT&=~BIT7; //SCL 0
      
      return(0);    //有应答返回0
    } 
}


//===============================================================================================================
void w128xl(unsigned char sjdz,unsigned char zdz1,unsigned char zdz0,unsigned char *w128tp,unsigned char w128zjs)
{ 

  loop_cx0:  start();
             w1_byte(0xde);
             if(r_ack())goto loop_cx0;
  loop_cx1:  w1_byte(0x00);
             if(r_ack())goto loop_cx1;
  loop_cx2:  w1_byte(0x3f);
             if(r_ack())goto loop_cx2;
  loop_cx3:  w1_byte(0x02);
             if(r_ack())goto loop_cx3;
             stop();
             
  loop_cx4:  start();
             w1_byte(0xde);
             if(r_ack())goto loop_cx4;
  loop_cx5:  w1_byte(0x00);
             if(r_ack())goto loop_cx5;
  loop_cx6:  w1_byte(0x3f);
             if(r_ack())goto loop_cx6;
  loop_cx7:  w1_byte(0x06);
             if(r_ack())goto loop_cx7;
             stop();

  loop_cx8:  start();
             w1_byte(sjdz);
             if(r_ack())goto loop_cx8;
  loop_cx9:  w1_byte(zdz1);
             if(r_ack())goto loop_cx9;
  loop_cx10: w1_byte(zdz0);
             if(r_ack())goto loop_cx10;
  for(;w128zjs>0;w128zjs--)
     {
       loop_cx11: w1_byte(*w128tp);
                  if(r_ack())goto loop_cx11;
                  w128tp++;
     } 
  stop(); 
}

//=============================================================================
unsigned char r1_byte(void)
{
  unsigned char r_bit,i;
  P5DIR&=~BIT6;       //SDA选择输入功能
  for(r_bit=8;r_bit>0;r_bit--)
    {  
       i=i<<1;
       P5OUT|=BIT7;     //SCL 1
       if(P5IN&BIT6)
        {
          i|=BIT0;
        }
       else
        {
          i&=~BIT0;
        }
       P5OUT&=~BIT7;    //SCL 0
    }
  return(i);
}
//============================================================================
void r128xl(unsigned char sjdz,unsigned char zdz1,unsigned char zdz0,unsigned char *r128tp,unsigned char r128zjs)
{
  if(sjdz==0xdf)          //相等读CCR阵列
   {
      loop_cx0: start();
                w1_byte(0xde);
                if(r_ack())goto loop_cx0;         
   }
  if(sjdz==0xaf)         //相等读EEPROM
   {
      loop_cx1: start();
                w1_byte(0xae);
                if(r_ack())goto loop_cx1;
   }
  loop_cx2: w1_byte(zdz1);
            if(r_ack())goto loop_cx2;
  loop_cx3: w1_byte(zdz0);
            if(r_ack())goto loop_cx3;        
  loop_cx4: start();
            w1_byte(sjdz);
            if(r_ack())goto loop_cx4; 
  for(;r128zjs>0;r128zjs--)
  {
    *r128tp=r1_byte();
    if(r128zjs==1)
     {
       stop();    //主机最后一个字节收到后直接发送停止
     }
    else
     {
       w_ack();   //主机回应答
       r128tp++;
     }
    
    
  }
}