339 lines
7.4 KiB
C
339 lines
7.4 KiB
C
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#include "flash_manager.h"
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#include "mymem.h"
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#include "spi_flash.h"
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#include "string.h"
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#ifndef BOOTLOADER
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# include "rtthread.h"
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#endif
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//使用信号量对FLASH的访问进行保护
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#ifndef BOOTLOADER
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static struct rt_semaphore g_flash={0};
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static rt_err_t g_flash_err=RT_ERROR;
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#define FLASH_ENTER_USED() {while (g_flash_err==RT_ERROR) \
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{g_flash_err=rt_sem_init(&g_flash,"g_flash",1,RT_IPC_FLAG_PRIO);}\
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rt_sem_take (&g_flash,RT_WAITING_FOREVER);\
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}
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#define FLASH_EXIT_USED() {rt_sem_release (&g_flash);}
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#else
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#define FLASH_ENTER_USED() {}
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#define FLASH_EXIT_USED() {}
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#endif
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int FLASH_ReadData (uint8_t* pBuffer, uint32_t ReadAddr , uint32_t NumByteToRead )
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{
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FLASH_ENTER_USED();
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sFLASH_ReadBuffer (pBuffer,ReadAddr,NumByteToRead);
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//SPI_Flash_Read (pBuffer,ReadAddr,NumByteToRead);
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//W25QXX_Read (pBuffer,ReadAddr,NumByteToRead);
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FLASH_EXIT_USED();
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return 0;
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}
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int FLASH_WriteData (uint8_t* pBuffer, uint32_t WriteAddr, uint32_t NumByteToWrite)
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{
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FLASH_ENTER_USED();
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sFLASH_WriteBuffer (pBuffer,WriteAddr,NumByteToWrite);
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//SPI_Flash_Write_NoCheck (pBuffer,WriteAddr,NumByteToWrite);
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//W25QXX_Write_NoCheck (pBuffer,WriteAddr,NumByteToWrite);
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FLASH_EXIT_USED();
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return 0;
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}
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int FLASH_EraseOneSector (uint32_t SectorAddr)
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{
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FLASH_ENTER_USED();
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sFLASH_EraseSector (SectorAddr);
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//SPI_Flash_Erase_Sector (SectorAddr);
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//W25QXX_Erase_Sector(SectorAddr);
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FLASH_EXIT_USED();
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return 0;
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}
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int FLASH_EraseAllSector (void)
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{
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FLASH_ENTER_USED();
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sFLASH_EraseBulk();
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//SPI_Flash_Erase_Chip ();
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//W25QXX_Erase_Chip();
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FLASH_EXIT_USED();
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return 0;
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}
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//向FLASH中添加文件
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//本函数把要添加文件的文件名，存储地址和大小信息存储至文件头中
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//函数没有进行地址是否重合的判断，请使用FLASH_GetUsed()函数取得可以使用的地址
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int FLASH_AddFile (char *fileName,u32 address,u32 fileSize)
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{
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FLASH_HeaderStruct *flashHeader=0;
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u32 flashHeaderSize=4096;
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flashHeader=mymalloc(flashHeaderSize);
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FLASH_ReadData((u8*)flashHeader,0,flashHeaderSize);
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for (int i=0;i<flashHeaderSize;i++) {if (((u8*)flashHeader)[i]==0xff) ((u8*)flashHeader)[i]=0;}
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flashHeader->File[flashHeader->FileNumber].Address=address;
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flashHeader->File[flashHeader->FileNumber].FileSize=fileSize;
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mymemcpy(flashHeader->File[flashHeader->FileNumber].FileName,fileName,strlen(fileName)+1);
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flashHeader->FileNumber++;
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FLASH_CheckErase(0,4096);
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FLASH_WriteData((u8*)flashHeader,0,4096);
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myfree(flashHeader);
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return 0;
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}
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//返回FLASH中存储的文件数目
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int FLASH_GetFileNum (void)
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{
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int ret=0;
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FLASH_HeaderStruct *flashHeader=0;
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u32 flashHeaderSize=4096;
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flashHeader=mymalloc(flashHeaderSize);
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FLASH_ReadData((u8*)flashHeader,0,flashHeaderSize);
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for (int i=0;i<flashHeaderSize;i++) {if (((u8*)flashHeader)[i]==0xff) ((u8*)flashHeader)[i]=0;}
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ret=flashHeader->FileNumber;
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myfree(flashHeader);
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return ret;
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}
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//获取指定索引的文件信息，返回0，成功
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int FLASH_GetFileInfo (int index,FLASH_FileStruct *file)
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{
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int ret=0;
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FLASH_HeaderStruct *flashHeader=0;
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u32 flashHeaderSize=4096;
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flashHeader=mymalloc(flashHeaderSize);
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FLASH_ReadData((u8*)flashHeader,0,flashHeaderSize);
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for (int i=0;i<flashHeaderSize;i++) {if (((u8*)flashHeader)[i]==0xff) ((u8*)flashHeader)[i]=0;}
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if (index<flashHeader->FileNumber)
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{
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mymemcpy (file, &flashHeader->File[index],sizeof (FLASH_FileStruct));
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}
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else { ret=-1; }
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myfree(flashHeader);
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return ret;
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}
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//删除指定索引之后的所有文件
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int FLASH_DeleteFile (int index)
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{
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int ret=0;
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FLASH_HeaderStruct *flashHeader=0;
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u32 flashHeaderSize=4096;
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flashHeader=mymalloc(flashHeaderSize);
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FLASH_ReadData((u8*)flashHeader,0,flashHeaderSize);
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for (int i=0;i<flashHeaderSize;i++) {if (((u8*)flashHeader)[i]==0xff) ((u8*)flashHeader)[i]=0;}
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if (index<flashHeader->FileNumber)
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{
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flashHeader->FileNumber=index;
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u32 sizeUsed=FLASH_GetUsed();
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FLASH_CheckErase(0,4096);
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FLASH_WriteData((u8*)flashHeader,0,4096);
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u32 addrToDelete =FLASH_GetUsed();
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u32 sizeToDelete=sizeUsed-addrToDelete;
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FLASH_CheckErase (addrToDelete,sizeToDelete);
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}
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else { ret=-1; }
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myfree(flashHeader);
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return ret;
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}
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//获取FLASH容量
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u32 FLASH_GetFlashSize (void)
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{
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return 16*1024*1024;
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}
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//返回FLASH已经使用了多少存储空间
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//此返回值可直接用于新文件的存储地址
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u32 FLASH_GetUsed (void)
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{
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FLASH_HeaderStruct *flashHeader=0;
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u32 flashHeaderSize=4096;
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u32 usedBluk=1;//文件索引用了一个块
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flashHeader=mymalloc(flashHeaderSize);
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FLASH_ReadData((u8*)flashHeader,0,flashHeaderSize);
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for (int i=0;i<flashHeaderSize;i++) {if (((u8*)flashHeader)[i]==0xff) ((u8*)flashHeader)[i]=0;}
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if (flashHeader->FileNumber<20)
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{
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for (int i=0;i<flashHeader->FileNumber;i++)
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{
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usedBluk+=flashHeader->File[i].FileSize/4096+1;
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}
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}
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myfree(flashHeader);
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return usedBluk*4096;
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}
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//读取指定文件,返回成功读取的大小
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int FLASH_ReadFile (char *fileName,u32 offset,u8 *recvBuff,u32 readLength)
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{
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int ret=0;
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u32 file_size=0;
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u32 file_addr=FLASH_FindFile (fileName,&file_size);
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if (file_addr)
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{
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int read_block=0;
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if (readLength>file_size-offset) readLength=file_size-offset;
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ret=readLength;
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while (readLength)
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{
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if (readLength>4096) read_block=4096;
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else read_block=readLength;
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FLASH_ReadData (recvBuff,file_addr+offset,read_block);
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offset+=read_block;
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readLength-=read_block;
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recvBuff+=read_block;
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}
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}
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else
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{
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ret=0;
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}
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return ret;
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}
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//保存文件,返回非0失败
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int FLASH_SaveFile (char *FileName,u8 *data,u32 size)
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{
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int ret=-1;
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if (FLASH_FindFile(FileName,0)==0)
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{
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u32 flash_write_addr=FLASH_GetUsed();
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u32 save_size=0;
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FLASH_CheckErase(flash_write_addr,size);
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FLASH_AddFile(FileName,flash_write_addr,size);
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while(size)
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{
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if (size>4096)
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{
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save_size=4096;
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}
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else
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{
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save_size=size;
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}
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FLASH_WriteData(data,flash_write_addr,save_size);
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size-=save_size;
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flash_write_addr+=save_size;
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data+=save_size;
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}
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ret=0;
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}
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return ret;
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}
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//查找是否有同名文件，无返回0，有返回偏移地址
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//参数size用于获取文件大小，不需要文件大小时此参数应为0
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u32 FLASH_FindFile (char *fileName,u32 *size)
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{
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FLASH_HeaderStruct *flashHeader=0;
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u32 flashHeaderSize=4096;
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u32 ret=0;
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flashHeader=mymalloc(flashHeaderSize);
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FLASH_ReadData((u8*)flashHeader,0,flashHeaderSize);
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for (int i=0;i<flashHeaderSize;i++) {if (((u8*)flashHeader)[i]==0xff) ((u8*)flashHeader)[i]=0;}
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if (flashHeader->FileNumber>20)//如果文件数量大于10说明文件被破坏
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{
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FLASH_EraseAllSector();
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flashHeader->FileNumber=0;
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}
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for (int i=0;i<flashHeader->FileNumber;i++)
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{
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if (strcmp(flashHeader->File[i].FileName,fileName)==0)
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{
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ret=flashHeader->File[i].Address;
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if (size) *size=flashHeader->File[i].FileSize;
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break;
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}
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}
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myfree(flashHeader);
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return ret;
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}
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//校验后擦除
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//校验FLASH中指定存储空间是否有数据，如果有数据，则进行擦除操作
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//函数没有进行地址对齐，请保证参数addr为4096的整数倍
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int FLASH_CheckErase (u32 addr,u32 size)
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{
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u8* flash_mem=mymalloc (4096);
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u32 check_size=size/4096;
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if (size%4096) check_size++;
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for (int i=0;i<check_size;i++)
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{
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FLASH_ReadData(flash_mem,addr,4096);
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for (int j=0;j<4096;j++)
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{
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if (flash_mem[j]!=0xff)
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{
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FLASH_EraseOneSector(addr);
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break;
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}
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}
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addr+=4096;
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}
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myfree(flash_mem);
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return 0;
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}
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//循环写入,必须在擦除之后才能写入
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int FLASH_LoopWrite (u32 addr,u32 size ,int (*pGetData)(u8 *buff,u32 size))
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{
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if (pGetData==0) return -1;
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u8* flash_mem=mymalloc (4096);
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u32 check_size=0;
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while (size)
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{
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if (size>4096)
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{
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check_size=4096;
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}
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else
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{
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check_size=size;
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}
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pGetData(flash_mem,check_size);
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FLASH_WriteData(flash_mem,addr,check_size);
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addr+=check_size;
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size-=check_size;
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}
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return 0;
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}
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