45DB041B读写问题！！！！！！！

zoujun2009

高手帮我看一下为什么读到这段指令while((AT45DB041B_StatusRegisterRead()&0x80)==0);死循环？？？？

unsigned char SPI_HostReadByte(void) //读出
{
  unsigned char i,rByte=0;
  for(i=0;i<8;i++)
  {
    SPI_SCK0();
    SPI_SCK1();
    rByte<<=1;
  if((IOPIN0&SPI_SO)==1)rByte|=1;
  }
  return rByte;
}  
void SPI_HostWriteByte(unsigned char wByte)   //写入
{
  unsigned char i;
  for(i=0;i<8;i++)
  {
    if((wByte<<i)&0x80) {SPI_SI1();}
    else {SPI_SI0();
  }
    SPI_SCK0();
    SPI_SCK1();
  }
}
unsigned char AT45DB041B_StatusRegisterRead(void)
{
  unsigned char i;
  SPI_CS0();
  SPI_HostWriteByte(0xd7);
  i=SPI_HostReadByte();
  SPI_CS1();
  return i;
}
void AT45DB041B_ContinuousArrayRead(BOOL PA,BOOL BFA,unsigned char *pHeader,BOOL len){
  unsigned int i;
   while((AT45DB041B_StatusRegisterRead()&0x80)==0);
//   while(i++<255){if(AT45DB041B_StatusRegisterRead()&0x80){break;}}
  SPI_CS0();
  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_CS1();
}
void AT45DB041B_BufferWrite(BYTE buffer,BOOL BFA,BYTE *pHeader,BOOL len){
  unsigned int i;
   while((AT45DB041B_StatusRegisterRead()&0x80)==0);
  //while(i++<255){if(AT45DB041B_StatusRegisterRead()&0x80){break;}}
  SPI_CS0();
  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_CS1();
}
void AT45DB041B_BufferToMainMemoryPageProgramWithBuilt_inErase(BYTE buffer,BOOL PA,BOOL BFA,BYTE *pHeader,BOOL len){
//   unsigned int i;
  AT45DB041B_BufferWrite(buffer,BFA,pHeader,len);
   while((AT45DB041B_StatusRegisterRead()&0x80)==0);
//   while(i++<1000){if(AT45DB041B_StatusRegisterRead()&0x80){break;}}
  SPI_CS0();
  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_CS1();
}
void AT45DB041B_BufferToMainMemoryPageProgramWithoutBuilt_inErase(BYTE buffer,BOOL PA,BOOL BFA,BYTE *pHeader,BOOL len){
  unsigned int i=0;
  AT45DB041B_BufferWrite(buffer,BFA,pHeader,len);
   while((AT45DB041B_StatusRegisterRead()&0x80)==0);
//   while(i++<1000){if(AT45DB041B_StatusRegisterRead()&0x80){break;}}
  SPI_CS0();
  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_CS1();
}

fcgyun

应该进一步跟一下具体死在哪了

ccontrol

AT45DB041B_StatusRegisterRead()函数里，不应该反复对片选操作，只要不断发送CLK，读取新状态数据就行了。