ucosiii会导致flash数据初始化，flash是W25Q64,对flash的操作函数是原子哥的例程

lionmon · 发表于 2017-3-20 13:44:00

ucosiii会导致flash数据初始化全部为0xff，flash是W25Q64,对flash的操作函数是原子哥的例程。而且我在进行flash操作的时候是把调度器给关闭掉的，求大神们帮助
void SPI_Flash_Write(CPU_INT08U* pBuffer,CPU_INT32U WriteAddr,CPU_INT16U NumByteToWrite)
{
      CPU_INT32U secpos;
      CPU_INT16U secoff;
      CPU_INT16U secremain;
      CPU_INT16U i;

      CPU_SR_ALLOC();

      OS_CRITICAL_ENTER();

      secpos=WriteAddr/4096;//扇区地址
      secoff=WriteAddr%4096;//在扇区内的偏移
      secremain=4096-secoff;//扇区剩余空间大小

      if(NumByteToWrite<=secremain)secremain=NumByteToWrite;//不大于4096个字节
      while(1)
      {
            SPI_Flash_Read(SPI_FLASH_BUF,secpos*4096,4096);//读出整个扇区的内容
            for(i=0;i<secremain;i++)//校验数据
            {
                     if(SPI_FLASH_BUF[secoff+i]!=0XFF)break;//需要擦除
            }
            if(i<secremain)//需要擦除
            {
                     SPI_Flash_Erase_Sector(secpos);//擦除这个扇区
                     for(i=0;i<secremain;i++)          //复制
                     {
                              SPI_FLASH_BUF[i+secoff]=pBuffer;
                     }
                     SPI_Flash_Write_NoCheck(SPI_FLASH_BUF,secpos*4096,4096);//写入整个扇区

            }else SPI_Flash_Write_NoCheck(pBuffer,WriteAddr,secremain);//写已经擦除了的,直接写入扇区剩余区间.
            if(NumByteToWrite==secremain)break;//写入结束了
            else//写入未结束
            {
                     secpos++;//扇区地址增1
                     secoff=0;//偏移位置为0

                        pBuffer+=secremain;  //指针偏移
                     WriteAddr+=secremain;//写地址偏移
                        NumByteToWrite-=secremain;                               //字节数递减
                     if(NumByteToWrite>4096)secremain=4096;       //下一个扇区还是写不完
                     else secremain=NumByteToWrite;                      //下一个扇区可以写完了
            }
      }
      OS_CRITICAL_EXIT_NO_SCHED();
}

void SPI_Flash_Read(CPU_INT08U* pBuffer,CPU_INT32U ReadAddr,CPU_INT16U NumByteToRead)
{
CPU_INT16U i;

CPU_SR_ALLOC();

OS_CRITICAL_ENTER();
SPI_FLASH_CS=0;                         //使能器件
SPI1_ReadWriteByte(W25X_ReadData);       //发送读取命令
SPI1_ReadWriteByte((CPU_INT08U)((ReadAddr)>>16));  //发送24bit地址
SPI1_ReadWriteByte((CPU_INT08U)((ReadAddr)>>8));
SPI1_ReadWriteByte((CPU_INT08U)ReadAddr);
for(i=0;i<NumByteToRead;i++)
      {
      pBuffer=SPI1_ReadWriteByte(0XFF); //循环读数
}
SPI_FLASH_CS=1;                         //取消片选
OS_CRITICAL_EXIT_NO_SCHED();
}