- e
- #define STM_SECTOR_SIZE 2048
- #endif
- u16 STMFLASH_BUF[STM_SECTOR_SIZE/2];//最多是2K字节
- void STMFLASH_Write(u32 WriteAddr,u16 *pBuffer,u16 NumToWrite)
- {
- u32 secpos; //扇区地址
- u16 secoff; //扇区内偏移地址(16位字计算)
- u16 secremain; //扇区内剩余地址(16位字计算)
- u16 i;
- u32 offaddr; //去掉0X08000000后的地址
- if(WriteAddr<STM32_FLASH_BASE||(WriteAddr>=(STM32_FLASH_BASE+1024*STM32_FLASH_SIZE)))return;//非法地址
- FLASH_Unlock(); //解锁
- offaddr=WriteAddr-STM32_FLASH_BASE; //实际偏移地址.
- secpos=offaddr/STM_SECTOR_SIZE; //扇区地址 0~127 for STM32F103RBT6
- secoff=(offaddr%STM_SECTOR_SIZE)/2; //在扇区内的偏移(2个字节为基本单位.)
- secremain=STM_SECTOR_SIZE/2-secoff; //扇区剩余空间大小
- if(NumToWrite<=secremain)secremain=NumToWrite;//不大于该扇区范围
- while(1)
- {
- STMFLASH_Read(secpos*STM_SECTOR_SIZE+STM32_FLASH_BASE,STMFLASH_BUF,STM_SECTOR_SIZE/2);//读出整个扇区的内容
- for(i=0;i<secremain;i++)//校验数据
- {
- if(STMFLASH_BUF[secoff+i]!=0XFFFF)break;//需要擦除
- }
- if(i<secremain)//需要擦除
- {
- FLASH_ErasePage(secpos*STM_SECTOR_SIZE+STM32_FLASH_BASE);//擦除这个扇区
- for(i=0;i<secremain;i++)//复制
- {
- STMFLASH_BUF[i+secoff]=pBuffer[i];
- }
- STMFLASH_Write_NoCheck(secpos*STM_SECTOR_SIZE+STM32_FLASH_BASE,STMFLASH_BUF,STM_SECTOR_SIZE/2);//写入整个扇区
- }else STMFLASH_Write_NoCheck(WriteAddr,pBuffer,secremain);//写已经擦除了的,直接写入扇区剩余区间.
- if(NumToWrite==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
- NumToWrite-=secremain; //字节(16位)数递减
- if(NumToWrite>(STM_SECTOR_SIZE/2))secremain=STM_SECTOR_SIZE/2;//下一个扇区还是写不完
- else secremain=NumToWrite;//下一个扇区可以写完了
- }
- };
- FLASH_Lock();//上锁
- }
- #endif
- //从指定地址开始读出指定长度的数据
- //ReadAddr:起始地址
- //pBuffer:数据指针
- //NumToWrite:半字(16位)数
- void STMFLASH_Read(u32 ReadAddr,u16 *pBuffer,u16 NumToRead)
- {
- u16 i;
- for(i=0;i<NumToRead;i++)
- {
- pBuffer[i]=STMFLASH_ReadHalfWord(ReadAddr);//读取2个字节.
- ReadAddr+=2;//偏移2个字节.
- }
- }
- //////////////////////////////////////////////////////////////////////////////////////////////////////
- //WriteAddr:起始地址
- //WriteData:要写入的数据
- void Test_Write(u32 WriteAddr,u16 WriteData)
- {
- STMFLASH_Write(WriteAddr,&WriteData,1);//写入一个字
- }
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