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- #include "flash.h"
- ////读取指定地址的半字(16位数据)
- ////faddr:读地址(此地址必须为2的倍数!!)
- ////返回值:对应数据.
- u16 STMFLASH_ReadHalfWord(u32 faddr)
- {
- return *(vu16*)faddr;
- }
- //
- //
- //#if STM32_FLASH_WREN //如果使能了写
- ////不检查的写入
- ////WriteAddr:起始地址
- ////pBuffer:数据指针
- ////NumToWrite:半字(16位)数
- //void STMFLASH_Write_NoCheck(u32 WriteAddr,u16 *pBuffer,u16 NumToWrite)
- //{
- // u16 i;
- // for(i=0;i<NumToWrite;i++)
- // {
- // FLASH_ProgramHalfWord(WriteAddr,pBuffer[i]);
- // WriteAddr+=2;//地址增加2.
- // }
- //}
- //
- ////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
- // 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
- //}
- /**********************************************************************************************************
- *写页数据,擦除整页2048字节,并写入Byte数据,数据可少于2048Btye,但必须是偶数。
- ************************************************************************************************************/
- void WritePageData(unsigned long WriteAddr,unsigned char *pData,unsigned short DataLen)
- {
- unsigned short i;
- unsigned short temp;
- FLASH_Status status;
- if(WriteAddr<STM32_FLASH_BASE || (WriteAddr>=(STM32_FLASH_BASE+2048*STM32_FLASH_SIZE)))return;//非法地址
- if(WriteAddr&0x0000007ff)return;//非页首地址
- FLASH_Unlock(); //解锁
- status=FLASH_ErasePage(WriteAddr);//擦除这个扇区
- if(status!=FLASH_COMPLETE){
- return;
- }
- //写入
- for(i = 0; i < DataLen; i+=2)
- {
- //数据8位融合为16位
- temp = (((unsigned short)pData[i+1])<<8) + ((unsigned short)pData[i]);
- FLASH_ProgramHalfWord((WriteAddr+i),temp);
- }
- FLASH_Lock();//上锁
- }
- /**********************************************************************************************************
- ************************************************************************************************************/
- void ReadFlashData(unsigned long ReadAddr,unsigned char *pData,unsigned short DataLen)
- {
- int i,j;
- unsigned short temp;
- j=0;
- for(i=0;i<DataLen;i+=2){
- temp=STMFLASH_ReadHalfWord(ReadAddr+i);
- pData[j++]=(unsigned char)(temp&0xff);
- pData[j++]=(temp>>8)&0xff;
- }
- }
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