sd_32m_manager.c

基于U（375）盘及SD（SPI模式）卡集成文件系统（包括底层驱动）

#include "SD_32M_Manager.h"
#define SECTOR_SIZE 512
#define SECTOR_NUMBER_PER_PHOTORECORD 9
#define PHOTO_RECORD_NUM 7280
#define START_PHOTO_RECORD_SECTOR 70000
#define END_PHOTO_RECORD_SECTOR 77280
#define SD_HIDEN_SIZE 32*1024*1024

/********************************************************************************************************************
** 函数名称: SD32M_mgr* flashManagerCreate(void)
** Name:	 SD32M_mgr* flashManagerCreate(void)
** 功能描述: 建立SD卡管理器				          
** Function: Create Manager for SD Card
** 输　  入: NULL
** Input:    NULL
** 输 　 出: SD卡管理器 	  		  
** Output:	 Manager for SD Card
*********************************************************************************************************************/
SD32M_mgr* SD32MmanagerCreate(void)
{
   SD32M_mgr* this = NULL;
   UINT8 *pSector=NULL;
   UINT32 count;
   
   this = (SD32M_mgr*)MEM_alloc(0,sizeof(SD32M_mgr),0);

   MMC_Init();

   if (this == NULL) 
   {
      return NULL;
   }
   else
   {
      this->realPhotoRecordNum = 0;   

      this->save_photo_record  = SD32MmgrSavePhotoRecord;
      this->get_photo_record   = SD32MmgrGetPhotoRecord;
      this->clear_record       = SD32MmgrClearRecord;
	  this->init_sd32M		   = SD32MmgrInitSD32M;
      pSector = (UINT8*)MEM_alloc(0,SECTOR_SIZE,0);
      if(pSector){
         //do with photo record
         for(count = START_PHOTO_RECORD_SECTOR;count <= END_PHOTO_RECORD_SECTOR;count=count+9)
         {      
            RBC_Read(count, 1, pSector);
            if((pSector[0]==0x55)&&pSector[1]==0xAA)
            	this->realPhotoRecordNum++;
            else
            	break;
         }
         //free space
         MEM_free(0,pSector,SECTOR_SIZE);
      }
      return this;
   }
}

/********************************************************************************************************************
** 函数名称: static  UINT8 SD32MmgrSavePhotoRecord(SD32M_mgr* p, photo_record_inf* pRecord)
** Name:	 static  UINT8 SD32MmgrSavePhotoRecord(SD32M_mgr* p, photo_record_inf* pRecord)
** 功能描述: 将照片存入SD卡中			          
** Function: Save photo to SD card
** 输　  入: SD32M_mgr* p：SD卡管理器指针
			 photo_record_inf* pRecord：照片信息
** Input:    SD32M_mgr* p：Pointer to SD Card Manager
			 photo_record_inf* pRecord：Photo information
** 输 　 出: 0：成功      1：失败	  		  
** Output:	 0：Success   1: Fail
*********************************************************************************************************************/
static  UINT8 SD32MmgrSavePhotoRecord(SD32M_mgr* p, photo_record_inf* pRecord)
{
   SD32M_mgr* this;
   UINT32 sector;

   this = p;

   if ((this == NULL)||(pRecord == NULL)) 
   {
      return NULL; 
   }
   else if(this->realPhotoRecordNum >= PHOTO_RECORD_NUM)
   {
      return NULL;
   }
   else
   {
      sector = START_PHOTO_RECORD_SECTOR + (this->realPhotoRecordNum) * SECTOR_NUMBER_PER_PHOTORECORD;
      RBC_Write(sector, SECTOR_NUMBER_PER_PHOTORECORD, pRecord);
      this->realPhotoRecordNum++;
      return TRUE;
   }
}
/********************************************************************************************************************
** 函数名称: static  UINT8 SD32MmgrGetPhotoRecord(SD32M_mgr* p, photo_record_inf* pRecord, UINT32 index)
** Name:	 static  UINT8 SD32MmgrGetPhotoRecord(SD32M_mgr* p, photo_record_inf* pRecord, UINT32 index)
** 功能描述: 从SD卡中取得照片信息		          
** Function: Get photo record from SD Card
** 输　  入: SD32M_mgr* p：SD卡管理器指针
			 photo_record_inf* pRecord：照片信息
			 UINT32 index：照片记录的位置
** Input:    SD32M_mgr* p：Pointer to SD Card Manager
			 photo_record_inf* pRecord：Photo information
			 UINT32 index：index position of the photo record
** 输 　 出: 0：成功      1：失败	  		  
** Output:	 0：Success   1: Fail
*********************************************************************************************************************/
static  UINT8 SD32MmgrGetPhotoRecord(SD32M_mgr* p, photo_record_inf* pRecord, UINT32 index)
{
   SD32M_mgr* this;
   UINT32 sector;

   this = p;

   if ((this == NULL)||(pRecord == NULL)||((index+1) > this->realPhotoRecordNum)) 
   {
      return NULL; 
   }
   else
   {
      sector = START_PHOTO_RECORD_SECTOR + index * SECTOR_NUMBER_PER_PHOTORECORD;
      RBC_Read(sector, SECTOR_NUMBER_PER_PHOTORECORD, pRecord);
      return TRUE;
   }
}
/********************************************************************************************************************
** 函数名称: static  UINT8 SD32MmgrClearRecord(SD32M_mgr* p)
** Name:	 static  UINT8 SD32MmgrClearRecord(SD32M_mgr* p)
** 功能描述: 从SD卡中取得照片信息		          
** Function: Get photo record from SD Card
** 输　  入: SD32M_mgr* p：SD卡管理器指针
** Input:    SD32M_mgr* p：Pointer to SD Card Manager
** 输 　 出: 0：成功      1：失败	  		  
** Output:	 0：Success   1: Fail
*********************************************************************************************************************/
static  UINT8 SD32MmgrClearRecord(SD32M_mgr* p)
{
   SD32M_mgr* this;
   UINT32 sector;

   this = p;

   if (this == NULL) 
   {
      return NULL; 
   }
   else
   {
      for(sector = START_PHOTO_RECORD_SECTOR;sector <= END_PHOTO_RECORD_SECTOR;sector++)
      {
         SD_EraseBlock(sector, 0);
   	  }
      this->realPhotoRecordNum = 0;
      return TRUE;
   }
}

/********************************************************************************************************************
** 函数名称: UINT8 SD32MmgrInitSD32M(SD32M_mgr* p)
** Name:	 UINT8 SD32MmgrInitSD32M(SD32M_mgr* p)
** 功能描述: 初始化SD卡中隐藏的32M空间					          
** Function: Initialize the hiden 32M memory space
** 输　  入: SD32M_mgr* p ：SD卡32M空间管理器
** Input:    SD32M_mgr* p ：The manager of the hiden 32M memory space
** 输 　 出:  	  		  
** Output:	  
*********************************************************************************************************************/
static  int SD32MmgrInitSD32M(SD32M_mgr* p)
{
	SD32M_mgr* this;
	UINT8* psector;
	int index;
	int i;
	UINT8 temp8;
	this = p;
	if(this == NULL)
	{
		return NULL;
	}
	psector = (UINT8*)MEM_alloc(0, SECTOR_SIZE,0);
	if(psector == NULL)
		return NULL;
	index = 0;
	for(i=START_PHOTO_RECORD_SECTOR;i<END_PHOTO_RECORD_SECTOR;i=i+9)
	{
		temp8 = RBC_Read(i,1,psector);
		if(temp8!=CH_OK)
			return -1;
		if((psector[0]=='H')&&(psector[1]=='W'))
		{
			index++ ;
		}
		else
			break;
			
	}
	return index;
}