138 lines
5.0 KiB
C
138 lines
5.0 KiB
C
/******************** (C) COPYRIGHT 2020 GEEKIMU *******************************
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* File Name : stmflash.c
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* Current Version : V2.0 & ST 3.5.0
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* Author : zhanli 719901725@qq.com & JustFeng.
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* Date of Issued : 2017.1.11 zhanli : Create
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* Comments : STM32 模拟Flash驱动
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********************************************************************************/
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#include "stmflash.h"
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#include "delay.h"
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#include "usart.h"
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#include "stm32f10x_flash.h"
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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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uint16_t STMFLASH_BUF[STM_SECTOR_SIZE / 2];//最多是2K字节
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/**----------------------------------------------------------------------
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* Function : STMFLASH_ReadHalfWord
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* Description : 读取指定地址的半字(16位数据)
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* Input : faddr:读地址(此地址必须为2的倍数)
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* Output : 对应16位数据
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* Author : zhanli&719901725@qq.com & JustFeng.
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* Date : 2015/10/3 zhanli
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*---------------------------------------------------------------------**/
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uint16_t STMFLASH_ReadHalfWord(uint32_t faddr)
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{
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return *(uint16_t*)faddr;
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}
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/**----------------------------------------------------------------------
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* Function : STMFLASH_Write_NoCheck
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* Description : 不检查的写入
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* Input : 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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* Output : 对应16位数据
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* Author : zhanli&719901725@qq.com & JustFeng.
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* Date : 2015/10/3 zhanli
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*---------------------------------------------------------------------**/
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void STMFLASH_Write_NoCheck(uint32_t WriteAddr,uint16_t *pBuffer,
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uint16_t NumToWrite)
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{
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uint16_t 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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// 地址增加2.
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WriteAddr += 2;
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}
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}
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/**----------------------------------------------------------------------
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* Function : STMFLASH_Write
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* Description : 初始化追踪器的所有校准数据
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* Input : 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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从指定地址开始写入指定长度的数据
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* Author : zhanli&719901725@qq.com & JustFeng.
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* Date : 2015/2/13 zhanli
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*---------------------------------------------------------------------**/
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void STMFLASH_Write(uint32_t WriteAddr,uint16_t *pBuffer,uint16_t NumToWrite)
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{
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uint32_t secpos; //扇区地址
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uint16_t secoff; //扇区内偏移地址(16位字计算)
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uint16_t secremain; //扇区内剩余地址(16位字计算)
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uint16_t i;
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uint32_t 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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// 读出整个扇区的内容
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STMFLASH_Read(secpos*STM_SECTOR_SIZE+STM32_FLASH_BASE,STMFLASH_BUF,STM_SECTOR_SIZE/2);
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// 校验数据
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for(i = 0;i < secremain; i++){
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if(STMFLASH_BUF[secoff+i] != 0XFFFF)break;//需要擦除
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}
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// 需要擦除
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if(i < secremain){
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// 擦除这个扇区
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FLASH_ErasePage(secpos*STM_SECTOR_SIZE+STM32_FLASH_BASE);
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// 复制
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for(i = 0;i < secremain; i++){
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STMFLASH_BUF[i+secoff]=pBuffer[i];
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}
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// 写入整个扇区
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STMFLASH_Write_NoCheck(secpos*STM_SECTOR_SIZE+STM32_FLASH_BASE,STMFLASH_BUF,STM_SECTOR_SIZE/2);
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}else{
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// 写已经擦除了的,直接写入扇区剩余区间.
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STMFLASH_Write_NoCheck(WriteAddr,pBuffer,secremain);
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}
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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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/**----------------------------------------------------------------------
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* Function : STMFLASH_Read
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* Description : 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：半字数
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* Author : zhanli&719901725@qq.com & JustFeng.
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* Date : 2015/2/13 zhanli
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*---------------------------------------------------------------------**/
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void STMFLASH_Read(uint32_t ReadAddr,uint16_t *pBuffer,uint16_t NumToRead)
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{
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uint16_t i;
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for(i = 0;i < NumToRead; i++){
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// 读取2个字节.
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pBuffer[i] = STMFLASH_ReadHalfWord(ReadAddr);
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// 读取地址偏移2个字节.
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ReadAddr += 2;
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}
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}
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