io模拟iic出现异常问题

只看该作者 · 2014-4-4 10:05

对24c32块写的时候出现异常，当我在写函数位置设置断点，可以写正常，当把断点取消就无法写入，

/*******************************************************************************
*功能描述  ：写eeprom页
*输入参数  ： uint16_t EepromAddr -- eeprom内部地址
*          uint8_t *Eepromdata -- eeprom写入buf
*          uint8_t WriteNumber -- eeprom写入字节数
*说明    ：WriteNumber根据不同芯片最大限值不同
*******************************************************************************/

void EepromWritePage(uint16_t EepromAddr,uint8_t *Eepromdata,uint8_t WriteNumber)
{
  IIC_Start();
  IIC_WriteByte(EEPROM_ID);
  IIC_ReceiveAck();
  IIC_WriteByte((EepromAddr>>8)&0x0f);
  IIC_ReceiveAck();
  IIC_WriteByte(EepromAddr&0xff);
  IIC_ReceiveAck();
  while(WriteNumber--)
  {
IIC_WriteByte(*Eepromdata++);
IIC_ReceiveAck();
  }
  IIC_Stop();
}

/*******************************************************************************
*功能描述  ：写Eeprom中数据入buf
*输入参数  ： uint16_t EepromAddr -- eeprom内部地址
*          uint8_t *EepromBuf -- eeprom写入buf
*          uint8_t WriteNumber -- eeprom写入字节数
*说明    ：此函数突破eeprom页的限制可随意写入其中一段存储空间
*******************************************************************************/

void EepromWriteBuf(uint16_t EepromAddr,uint8_t *EepromBuf,uint8_t WriteNumber)
{
uint8_t Num_page = 0,Num_tmp = 0,Addr_Count = 0;
uint16_t Addr_tmp = 0;

  Addr_tmp = EepromAddr%PAGE_SIZE;
  Addr_Count = PAGE_SIZE-Addr_tmp;
  Num_page = WriteNumber/PAGE_SIZE;
  Num_tmp = WriteNumber%PAGE_SIZE;

  if(Addr_tmp == 0)
  {
if(Num_page == 0)
{
   EepromWritePage(EepromAddr,EepromBuf,WriteNumber);
}
else
{
   while(Num_page--)
   {
      EepromWritePage(EepromAddr,EepromBuf,PAGE_SIZE);
      EepromAddr += PAGE_SIZE;
      EepromBuf += PAGE_SIZE;
   }
   if(Num_tmp)
      EepromWritePage(EepromAddr,EepromBuf,Num_tmp);
}
  }
  else
  {
if(Num_page == 0)
{
   if(WriteNumber>Addr_Count)
   {
      EepromWritePage(EepromAddr,EepromBuf,Addr_Count);
      EepromBuf += Addr_Count;
      EepromAddr += Addr_Count;
      EepromWritePage(EepromAddr,EepromBuf,WriteNumber-Addr_Count);
   }
   else
   {
      EepromWritePage(EepromAddr,EepromBuf,Num_tmp);
   }
}
else
{
   WriteNumber -= Addr_Count;
   Num_page = WriteNumber/PAGE_SIZE;
   Num_tmp = WriteNumber%PAGE_SIZE;
   if(Addr_Count)
   {
      EepromWritePage(EepromAddr,EepromBuf,Addr_Count);
      EepromBuf += Addr_Count;
      EepromAddr += Addr_Count;
   }

   while(Num_page--)
   {
      EepromWritePage(EepromAddr,EepromBuf,PAGE_SIZE);
      EepromAddr += PAGE_SIZE;
      EepromBuf += PAGE_SIZE;
   }
   if(Num_tmp)
      EepromWritePage(EepromAddr,EepromBuf,Num_tmp);
   }
  }
}