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yueming
@@ -1,116 +1,116 @@
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#include "stmflash.h"
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//读取指定地址的半字(16位数据)
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//faddr:读地址(此地址必须为2的倍数!!)
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//返回值:对应数据.
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u16 STMFLASH_ReadHalfWord(u32 faddr)
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{
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return *(vu16*)faddr;
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}
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#if STM32_FLASH_WREN //如果使能了写
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//不检查的写入
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//WriteAddr:起始地址
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//pBuffer:数据指针
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//NumToWrite:半字(16位)数
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void STMFLASH_Write_NoCheck(u32 WriteAddr,u16 *pBuffer,u16 NumToWrite)
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{
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u16 i;
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for(i=0;i<NumToWrite;i++)
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{
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FLASH_ProgramHalfWord(WriteAddr,pBuffer[i]);
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WriteAddr+=2;//地址增加2.
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}
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}
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//从指定地址开始写入指定长度的数据
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//WriteAddr:起始地址(此地址必须为2的倍数!!)
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//pBuffer:数据指针
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//NumToWrite:半字(16位)数(就是要写入的16位数据的个数.)
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#if STM32_FLASH_SIZE<256
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#define STM_SECTOR_SIZE 1024 //字节
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#else
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#define STM_SECTOR_SIZE 2048
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#endif
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u16 STMFLASH_BUF[STM_SECTOR_SIZE/2];//最多是2K字节
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void STMFLASH_Write(u32 WriteAddr,u16 *pBuffer,u16 NumToWrite)
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{
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u32 secpos; //扇区地址
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u16 secoff; //扇区内偏移地址(16位字计算)
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u16 secremain; //扇区内剩余地址(16位字计算)
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u16 i;
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u32 offaddr; //去掉0X08000000后的地址
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if(WriteAddr<STM32_FLASH_BASE||(WriteAddr>=(STM32_FLASH_BASE+1024*STM32_FLASH_SIZE)))return;//非法地址
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FLASH_Unlock(); //解锁
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offaddr=WriteAddr-STM32_FLASH_BASE; //实际偏移地址.
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secpos=offaddr/STM_SECTOR_SIZE; //扇区地址 0~127 for STM32F103RBT6
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secoff=(offaddr%STM_SECTOR_SIZE)/2; //在扇区内的偏移(2个字节为基本单位.)
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secremain=STM_SECTOR_SIZE/2-secoff; //扇区剩余空间大小
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if(NumToWrite<=secremain)secremain=NumToWrite;//不大于该扇区范围
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while(1)
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{
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STMFLASH_Read(secpos*STM_SECTOR_SIZE+STM32_FLASH_BASE,STMFLASH_BUF,STM_SECTOR_SIZE/2);//读出整个扇区的内容
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for(i=0;i<secremain;i++)//校验数据
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{
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if(STMFLASH_BUF[secoff+i]!=0XFFFF)break;//需要擦除
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}
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if(i<secremain)//需要擦除
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{
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FLASH_ErasePage(secpos*STM_SECTOR_SIZE+STM32_FLASH_BASE);//擦除这个扇区
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for(i=0;i<secremain;i++)//复制
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{
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STMFLASH_BUF[i+secoff]=pBuffer[i];
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}
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STMFLASH_Write_NoCheck(secpos*STM_SECTOR_SIZE+STM32_FLASH_BASE,STMFLASH_BUF,STM_SECTOR_SIZE/2);//写入整个扇区
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}else STMFLASH_Write_NoCheck(WriteAddr,pBuffer,secremain);//写已经擦除了的,直接写入扇区剩余区间.
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if(NumToWrite==secremain)break;//写入结束了
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else//写入未结束
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{
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secpos++; //扇区地址增1
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secoff=0; //偏移位置为0
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pBuffer+=secremain; //指针偏移
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WriteAddr+=secremain; //写地址偏移
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NumToWrite-=secremain; //字节(16位)数递减
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if(NumToWrite>(STM_SECTOR_SIZE/2))secremain=STM_SECTOR_SIZE/2;//下一个扇区还是写不完
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else secremain=NumToWrite;//下一个扇区可以写完了
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}
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};
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FLASH_Lock();//上锁
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}
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#endif
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//从指定地址开始读出指定长度的数据
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//ReadAddr:起始地址
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//pBuffer:数据指针
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//NumToWrite:半字(16位)数
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void STMFLASH_Read(u32 ReadAddr,u16 *pBuffer,u16 NumToRead)
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{
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u16 i;
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for(i=0;i<NumToRead;i++)
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{
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pBuffer[i]=STMFLASH_ReadHalfWord(ReadAddr);//读取2个字节.
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ReadAddr+=2;//偏移2个字节.
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}
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}
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//////////////////////////////////////////////////////////////////////////////////////////////////////
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//WriteAddr:起始地址
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//WriteData:要写入的数据
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void Test_Write(u32 WriteAddr,u16 WriteData)
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{
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STMFLASH_Write(WriteAddr,&WriteData,1);//写入一个字
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}
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#include "stmflash.h"
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//读取指定地址的半字(16位数据)
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//faddr:读地址(此地址必须为2的倍数!!)
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//返回值:对应数据.
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u16 STMFLASH_ReadHalfWord(u32 faddr)
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{
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return *(vu16*)faddr;
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}
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#if STM32_FLASH_WREN //如果使能了写
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//不检查的写入
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//WriteAddr:起始地址
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//pBuffer:数据指针
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//NumToWrite:半字(16位)数
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void STMFLASH_Write_NoCheck(u32 WriteAddr,u16 *pBuffer,u16 NumToWrite)
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{
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u16 i;
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for(i=0;i<NumToWrite;i++)
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{
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FLASH_ProgramHalfWord(WriteAddr,pBuffer[i]);
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WriteAddr+=2;//地址增加2.
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}
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}
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//从指定地址开始写入指定长度的数据
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//WriteAddr:起始地址(此地址必须为2的倍数!!)
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//pBuffer:数据指针
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//NumToWrite:半字(16位)数(就是要写入的16位数据的个数.)
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#if STM32_FLASH_SIZE<256
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#define STM_SECTOR_SIZE 1024 //字节
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#else
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#define STM_SECTOR_SIZE 2048
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#endif
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u16 STMFLASH_BUF[STM_SECTOR_SIZE/2];//最多是2K字节
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void STMFLASH_Write(u32 WriteAddr,u16 *pBuffer,u16 NumToWrite)
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{
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u32 secpos; //扇区地址
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u16 secoff; //扇区内偏移地址(16位字计算)
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u16 secremain; //扇区内剩余地址(16位字计算)
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u16 i;
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u32 offaddr; //去掉0X08000000后的地址
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if(WriteAddr<STM32_FLASH_BASE||(WriteAddr>=(STM32_FLASH_BASE+1024*STM32_FLASH_SIZE)))return;//非法地址
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FLASH_Unlock(); //解锁
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offaddr=WriteAddr-STM32_FLASH_BASE; //实际偏移地址.
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secpos=offaddr/STM_SECTOR_SIZE; //扇区地址 0~127 for STM32F103RBT6
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secoff=(offaddr%STM_SECTOR_SIZE)/2; //在扇区内的偏移(2个字节为基本单位.)
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secremain=STM_SECTOR_SIZE/2-secoff; //扇区剩余空间大小
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if(NumToWrite<=secremain)secremain=NumToWrite;//不大于该扇区范围
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while(1)
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{
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STMFLASH_Read(secpos*STM_SECTOR_SIZE+STM32_FLASH_BASE,STMFLASH_BUF,STM_SECTOR_SIZE/2);//读出整个扇区的内容
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for(i=0;i<secremain;i++)//校验数据
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{
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if(STMFLASH_BUF[secoff+i]!=0XFFFF)break;//需要擦除
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}
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if(i<secremain)//需要擦除
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{
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FLASH_ErasePage(secpos*STM_SECTOR_SIZE+STM32_FLASH_BASE);//擦除这个扇区
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for(i=0;i<secremain;i++)//复制
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{
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STMFLASH_BUF[i+secoff]=pBuffer[i];
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}
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STMFLASH_Write_NoCheck(secpos*STM_SECTOR_SIZE+STM32_FLASH_BASE,STMFLASH_BUF,STM_SECTOR_SIZE/2);//写入整个扇区
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}else STMFLASH_Write_NoCheck(WriteAddr,pBuffer,secremain);//写已经擦除了的,直接写入扇区剩余区间.
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if(NumToWrite==secremain)break;//写入结束了
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else//写入未结束
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{
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secpos++; //扇区地址增1
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secoff=0; //偏移位置为0
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pBuffer+=secremain; //指针偏移
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WriteAddr+=secremain; //写地址偏移
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NumToWrite-=secremain; //字节(16位)数递减
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if(NumToWrite>(STM_SECTOR_SIZE/2))secremain=STM_SECTOR_SIZE/2;//下一个扇区还是写不完
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else secremain=NumToWrite;//下一个扇区可以写完了
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}
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};
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FLASH_Lock();//上锁
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}
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#endif
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//从指定地址开始读出指定长度的数据
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//ReadAddr:起始地址
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//pBuffer:数据指针
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//NumToWrite:半字(16位)数
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void STMFLASH_Read(u32 ReadAddr,u16 *pBuffer,u16 NumToRead)
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{
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u16 i;
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for(i=0;i<NumToRead;i++)
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{
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pBuffer[i]=STMFLASH_ReadHalfWord(ReadAddr);//读取2个字节.
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ReadAddr+=2;//偏移2个字节.
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}
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}
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//////////////////////////////////////////////////////////////////////////////////////////////////////
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//WriteAddr:起始地址
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//WriteData:要写入的数据
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void Test_Write(u32 WriteAddr,u16 WriteData)
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{
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STMFLASH_Write(WriteAddr,&WriteData,1);//写入一个字
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}
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