贴上程序，大虾们再给看看

只看该作者 · 2009-6-25 15:41

问题：这是测试AT45DB041的程序，供电状态下读写都没有问题，一旦断电在通上电，读操作保存的数据都正确，就是别写，一写之前保存的数据全错了，但后写入的数据还是对的。实在想不出怎么回事了？

unsigned char SPI_HostReadByte(void)
{
  unsigned char i,rByte=0;

  for(i=0;i<8;i++){
    SPI_SCK=0;

    SPI_SCK=1;

    rByte<<=1;
    rByte|=SPI_SO;
  }
  return rByte;
}

void SPI_HostWriteByte(unsigned char wByte)
{
  unsigned char i;

  for(i=0;i<8;i++){
    if((wByte<<i)&0x80) {SPI_SI=1;}
    else {SPI_SI=0;}

    SPI_SCK=0;

    SPI_SCK=1;

  }
}

unsigned char AT45DB041B_StatusRegisterRead(void)
{
  unsigned char i;

  SPI_CS=0;
  SPI_HostWriteByte(0xd7);
  i=SPI_HostReadByte();
  SPI_CS=1;

  return i;
}

void AT45DB041B_ContinuousArrayRead(unsigned int PA,unsigned int BFA,unsigned char *pHeader,unsigned int len)
{
  unsigned int i;

   while(!(AT45DB041B_StatusRegisterRead()&0x80));

  SPI_CS=0;

  SPI_HostWriteByte(0xe8);
  SPI_HostWriteByte((unsigned char)(PA>>7));
  SPI_HostWriteByte((unsigned char)((PA<<1)|(BFA>>8)));
  SPI_HostWriteByte((unsigned char)BFA);
  for(i=0;i<4;i++){SPI_HostWriteByte(0x00);}

  for(i=0;i<len;i++)
  {
     pHeader=SPI_HostReadByte();
  }
  SPI_CS=1;

}

void AT45DB041B_BufferWrite(unsigned char buffer,unsigned int BFA,unsigned char *pHeader,unsigned int len)
{
  unsigned int i;

   while(!(AT45DB041B_StatusRegisterRead()&0x80));
  SPI_CS=0;

  switch(buffer){
    case 1:SPI_HostWriteByte(0x84);break;
    case 2:SPI_HostWriteByte(0x87);break;
  }
  SPI_HostWriteByte(0x00);
  SPI_HostWriteByte((unsigned char)(BFA>>8));
  SPI_HostWriteByte((unsigned char)BFA);

  for(i=0;i<len;i++)
  {
      SPI_HostWriteByte(pHeader);
  }
  SPI_CS=1;

}

void AT45DB041B_BufferToMainMemoryPageProgramWithBuilt_inErase(unsigned char buffer,unsigned int PA,unsigned int BFA,unsigned char *pHeader,unsigned int len)
{

  AT45DB041B_BufferWrite(buffer,BFA,pHeader,len);
   while(!(AT45DB041B_StatusRegisterRead()&0x80));

  SPI_CS=0;

  switch(buffer){
    case 1:SPI_HostWriteByte(0x83);break;
    case 2:SPI_HostWriteByte(0x86);break;
  }
  SPI_HostWriteByte((unsigned char)(PA>>7));
  SPI_HostWriteByte((unsigned char)(PA<<1));
  SPI_HostWriteByte(0x00);
  SPI_CS=1;

}

void AT45DB041B_BufferToMainMemoryPageProgramWithoutBuilt_inErase(unsigned int buffer,unsigned int PA,unsigned int BFA,unsigned char *pHeader,unsigned int len){
  unsigned int i=0;

  AT45DB041B_BufferWrite(buffer,BFA,pHeader,len);

   while(!(AT45DB041B_StatusRegisterRead()&0x80));
  SPI_CS=0;
  SPI_HostWriteByte(0x87+buffer);
  SPI_HostWriteByte((unsigned char)(PA>>7));
  SPI_HostWriteByte((unsigned char)(PA<<1));
  SPI_HostWriteByte(0x00);

  for(i=0;i<len;i++)
  {
     SPI_HostWriteByte(pHeader);
  }
  SPI_CS=1;

}

/**********************************
     主函数
**********************************/
void main(void)
{
    unsigned int i;

    UartInit();

     SPI_RESET = 0;
     Delay(200);
     SPI_RESET = 1;

    while(1)
    {
        if(flag_rxd)
        {
           if(uartrxbuff[0]==0xaa)
           {
              AT45DB041B_BufferToMainMemoryPageProgramWithBuilt_inErase(1,uartrxbuff[1],uartrxbuff[2],uartrxbuff,6);
              SBUF = 0xaa;
              while(!TI);
              TI = 0;
           } else {
              AT45DB041B_ContinuousArrayRead(uartrxbuff[1],uartrxbuff[2],uarttxbuff,6);
              for(i=0;i<6;i++)
              {
                    SBUF = uarttxbuff;
                  while(!TI);
                  TI = 0;
              }
           }

           for(i=0;i<2000;i++);
           flag_rxd = 0;
        }
    }
}

贴上程序，大虾们再给看看

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