73 lines
1.9 KiB
C
73 lines
1.9 KiB
C
/*
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* flash.c
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*
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* Created on: 2021年10月15日
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* Author: wuwenfeng
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*/
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#include "flash.h"
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uint32_t STMFLASH_ReadWord(uint32_t faddr)
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{
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return *(uint32_t*)faddr;
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}
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void STMFLASH_Write(uint32_t WriteAddr,uint32_t *pBuffer,uint32_t NumToWrite)
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{
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FLASH_EraseInitTypeDef FlashEraseInit;
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HAL_StatusTypeDef FlashStatus=HAL_OK;
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uint32_t PageError=0;
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uint32_t addrx=0;
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uint32_t endaddr=0;
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if(WriteAddr<STM32_FLASH_BASE||WriteAddr%4)return; //非法地址
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HAL_FLASH_Unlock(); //解锁
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addrx=WriteAddr; //写入的起始地址
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endaddr=WriteAddr+NumToWrite*8; //写入的结束地址
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if(addrx<0X1FFF0000)
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{
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while(addrx<endaddr) //扫清一切障碍.(对非FFFFFFFF的地方,先擦除)
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{
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if(STMFLASH_ReadWord(addrx)!=0XFFFFFFFF) //有非0XFFFFFFFF的地方,要擦除这个扇区
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{
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FlashEraseInit.TypeErase=FLASH_TYPEERASE_PAGES; //擦除类型，页擦除
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FlashEraseInit.PageAddress=31; //从哪页开始擦除
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FlashEraseInit.NbPages=1; //一次只擦除一页
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if(HAL_FLASHEx_Erase(&FlashEraseInit,&PageError)!=HAL_OK)
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{
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break;//发生错误了
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}
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}else addrx+=4;
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FLASH_WaitForLastOperation(FLASH_WAITETIME); //等待上次操作完成
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}
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}
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FlashStatus=FLASH_WaitForLastOperation(FLASH_WAITETIME); //等待上次操作完成
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if(FlashStatus==HAL_OK)
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{
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while(WriteAddr<endaddr) //写数据
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{
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if(HAL_FLASH_Program(FLASH_TYPEPROGRAM_DOUBLEWORD,WriteAddr,*(uint64_t*) pBuffer)!=HAL_OK)//写入数据
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{
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break; //写入异常
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}
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WriteAddr+=8;
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pBuffer+=2;
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}
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}
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HAL_FLASH_Lock(); //上锁
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}
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void STMFLASH_Read(uint32_t ReadAddr,uint32_t *pBuffer,uint32_t NumToRead) //连续读取
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{
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uint32_t i;
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for(i=0;i<NumToRead;i++)
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{
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pBuffer[i]=STMFLASH_ReadWord(ReadAddr); //读取4个字节.
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ReadAddr+=4; //偏移4个字节.
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}
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}
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