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用的是正点原子的代码。问题描述如下:
用结构体定义 mflash ,除了cpuid不对,其他的都对,flash起始地址改了也一样,感觉好像是固定的
flash data(len=92):AA5555AA0001020304050000884D0008884D0008FFFFFFFFFFFF54502D4C494E4B5F39374242000000000000000000000000000000000000000073616E676B696E6732303300000000000000000000000000000000000000000043FF
flash data(len=92):AA5555AA0001020304050000144E0008144E0008FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
- typedef struct{
- uint32_t head; //Í·
- char test[6];
- char cpuid[16];
- char isCPUid;
- char ssid[32];
- char psw[32];
- char isConfig;
- }s_flash;
- extern s_flash mflash;
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- #ifndef __BSP_INFLASH_H
- #define __BSP_INFLASH_H
- #include "main.h"
- typedef struct{
- uint32_t head; //头
- char test[6];
- char cpuid[16];
- char isCPUid;
- char ssid[32];
- char psw[32];
- char isConfig;
- }s_flash;
- extern s_flash mflash;
- //要写入到STM32 FLASH的字符串数组
- #define FLASH_SAVE_ADDR 0X08040000 //设置FLASH 保存地址(必须为偶数,且其值要大于本代码所占用FLASH的大小+0X08000000)
- //#define F_SIZE 1024 //数组长度
- //extern char flashBuffer[F_SIZE];
- //用户根据自己的需要设置
- #define STM32_FLASH_SIZE 512 //所选STM32的FLASH容量大小(单位为K)
- #define STM32_FLASH_WREN 1 //使能FLASH写入(0,不是能;1,使能)
- //////////////////////////////////////////////////////////////////////////////////////////////////////
- //FLASH起始地址
- #define STM32_FLASH_BASE 0x08000000 //STM32 FLASH的起始地址
-
-
- uint16_t STMFLASH_ReadHalfWord(uint32_t faddr); //读出半字
- void STMFLASH_WriteLenByte(uint32_t WriteAddr,uint32_t DataToWrite,uint16_t Len); //指定地址开始写入指定长度的数据
- uint32_t STMFLASH_ReadLenByte(uint32_t ReadAddr,uint16_t Len); //指定地址开始读取指定长度数据
- void STMFLASH_Write(uint32_t WriteAddr,uint16_t *pBuffer,uint16_t NumToWrite); //从指定地址开始写入指定长度的数据
- void STMFLASH_Read(uint32_t ReadAddr,uint16_t *pBuffer,uint16_t NumToRead); //从指定地址开始读出指定长度的数据
- //测试写入
- void Test_Write(uint32_t WriteAddr,uint16_t WriteData);
- int Flash_Config(void);
- void Flash_Save(void);
- #endif /* __KEY_H */
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- #include "main.h"
- //************************************************************//
- //要写入到STM32 FLASH的字符串数组
- //char flashBuffer[F_SIZE];
- //************************************************************//
- //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.
- uint16_t STMFLASH_ReadHalfWord(uint32_t 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(uint32_t WriteAddr,uint16_t *pBuffer,uint16_t NumToWrite)
- {
- uint16_t 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
- uint16_t STMFLASH_BUF[STM_SECTOR_SIZE/2];//最多是2K字节
- void STMFLASH_Write(uint32_t WriteAddr,uint16_t *pBuffer,uint16_t NumToWrite)
- {
- uint32_t secpos; //扇区地址
- uint16_t secoff; //扇区内偏移地址(16位字计算)
- uint16_t secremain; //扇区内剩余地址(16位字计算)
- uint16_t i;
- uint32_t 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(uint32_t ReadAddr,uint16_t *pBuffer,uint16_t NumToRead)
- {
- uint16_t 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(uint32_t WriteAddr,uint16_t WriteData)
- {
- STMFLASH_Write(WriteAddr,&WriteData,1);//写入一个字
- }
- //********************* 外部接口 **************************//
- s_flash mflash; //需要存储的变量
- int Flash_Config(void)
- {
- char test[10]={0xaa,0x55,0x55,0xaa,0,0,0,0,0,0};
- int i;
- memset(&mflash,0,sizeof(s_flash));
-
- STMFLASH_Write(FLASH_SAVE_ADDR,(uint16_t*)test,10);
- STMFLASH_Read(FLASH_SAVE_ADDR,(uint16_t*)(&mflash),sizeof(s_flash));
-
- printf("flash data(len=%d):",sizeof(s_flash));
- for(i=0;i<sizeof(s_flash);i++){
- printf("%02X",*((char*)(&mflash)+i));
- }
- printf("\r\n");
-
- if(mflash.isCPUid!='C'){
- memset(mflash.cpuid,0,sizeof(mflash.cpuid));
- }
-
- if(mflash.isConfig!='C'){
- sprintf(mflash.ssid, "no wifi ssid");
- sprintf(mflash.psw, "no wifi password");
- }
-
- printf("mflash.head=%04lX\r\n",mflash.head);
- printf("isConfig:0x%02X\r\n",mflash.isConfig);
- printf("ssid:%s\r\n",mflash.ssid);
- printf("password:%s\r\n",mflash.psw);
- printf("isCPUid:0x%02X\r\n",mflash.isCPUid);
- printf("cpuid:"); for(i=0;i<8;i++){ printf("%02X",mflash.cpuid[i]); } printf("\r\n");
-
- if(mflash.head != 0xaa5555aa){
- printf("Flash is error!!!\r\n");
- return -1;
- }
-
- return 0;
- }
- void Flash_Save(void)
- {
- STMFLASH_Write(FLASH_SAVE_ADDR,(uint16_t*)(&mflash),sizeof(s_flash));
- }
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