此函数是老版本，有bug。
新版本代码：
[mw_shl_code=c,true]//从指定地址开始写入指定长度的数据 //WriteAddr:起始地址(此地址必须为2的倍数!!) //pBuffer:数据指针 //NumToWrite:半字(16位)数(就是要写入的16位数据的个数.) #if STM32_FLASH_SIZE<256 #define STM_SECTOR_SIZE 1024 //字节 #else #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 STMFLASH_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 { STMFLASH_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; } 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*2; //写地址偏移(16位数据地址,需要*2) 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 } }; STMFLASH_Lock();//上锁 }[/mw_shl_code]