************************AT45DB081讀狀態(tài)寄存器函數(shù)************************/
/*函數(shù)原型:void AT45DB081_read_St_REG()
/*函數(shù)功能:AT45DB081讀狀態(tài)寄存器
/*輸入?yún)?shù):無
/*輸出參數(shù):無
/*調(diào)用模塊:無
//作者：丁霄
/*建立時(shí)間:2006/08/26
/*************************************************************************/
unsigned char AT45DB081_read_St_REG()
{
    unsigned char i,index_copy;
    SS=1;
    SS=0;
    i=AT45DB081_SPI_RW(STATUS_REG_READ); //讀AT45DB081狀態(tài)寄存器
    i=AT45DB081_SPI_RW(0x00);
  
 index_copy=((i&0x38)>>3);  //取出AT45DB系列存儲(chǔ)器的特征碼
 PageBits=DF_pagebits[index_copy];
 PageSize=DF_pagesize[index_copy];
    return (i);
}
/************************AT45DB081主存寫函數(shù)*************************/
/*函數(shù)原型:void AT45DB081_page_write(unsigned int page_add,unsigned int buff_add,unsigned char* data_source)
/*函數(shù)功能:AT45DB081主存寫
/*輸入?yún)?shù):page_add,buff_add,data_source  頁地址 緩沖第一個(gè)操作地址 數(shù)據(jù)源
/*輸出參數(shù):無
/*調(diào)用模塊:無
//作者：丁霄
/*建立時(shí)間:2006/08/26
/**************************************************************************/
void AT45DB081_page_write(unsigned int page_add,unsigned int buff_add,unsigned char* data_source)
{
  unsigned int count;  //計(jì)數(shù)
  unsigned int MAX_str;
/***************數(shù)據(jù)格式**************
--------------------------------------------------------------
| CMD | rrr,PA11-7 | PA6-0,BFA8 | BF7-0 | data_n | data_(n+1)|
--------------------------------------------------------------
***************************************/
    SS=1;
    SS=0;
    AT45DB081_SPI_RW(MAIN_PAGE_WRITE); //AT45DB081寫主存
 AT45DB081_SPI_RW((unsigned char)(page_add>>(16-PageBits)));      //upper part of page address
 AT45DB081_SPI_RW((unsigned char)((page_add<<(PageBits-8))|(buff_add>>8))); 
 AT45DB081_SPI_RW((unsigned char)(buff_add));          //LSB byte of internal page address
 AT45DB081_SPI_RW(0x00); //發(fā)送空操作數(shù)據(jù)              //perform 4 dummy writes
 AT45DB081_SPI_RW(0x00);               //in order to intiate DataFlash
 AT45DB081_SPI_RW(0x00);               //address pointers
 AT45DB081_SPI_RW(0x00);
    
 MAX_str=strlen(data_source);
    for(count=0;count<MAX_str;count++)
   {
     AT45DB081_SPI_RW(*(data_source+count));  //將制定數(shù)據(jù)寫入存儲(chǔ)器
   }
}
/************************AT45DB081主存讀函數(shù)*************************/
/*函數(shù)原型:void AT45DB081_page_read(unsigned int page_add,unsigned int buff_add,unsigned char* save_data)
/*函數(shù)功能:AT45DB081主存讀
/*輸入?yún)?shù):page_add,buff_add,save_data  頁地址 緩沖第一個(gè)操作地址 存儲(chǔ)地址
/*輸出參數(shù):無
/*調(diào)用模塊:無
//作者：丁霄
/*建立時(shí)間:2006/08/28
/****************************************************************/
void AT45DB081_page_read(unsigned int page_add,unsigned int buff_add,unsigned char* save_data)
{
    unsigned int count;  //計(jì)數(shù)
 
    SS=1;
    SS=0;
    AT45DB081_SPI_RW(MAIN_PAGE_READ);  //AT45DB081讀主存
 AT45DB081_SPI_RW((unsigned char)(page_add>>(16-PageBits)));      //upper part of page address
 AT45DB081_SPI_RW((unsigned char)((page_add<<(PageBits-8))|(buff_add>>8)));
 AT45DB081_SPI_RW((unsigned char)(buff_add)); 
 AT45DB081_SPI_RW(0x00);  //發(fā)送空操作數(shù)據(jù)
 AT45DB081_SPI_RW(0x00); 
 AT45DB081_SPI_RW(0x00); 
 AT45DB081_SPI_RW(0x00);
    AT45DB081_SPI_RW(0x00); 
 AT45DB081_SPI_RW(0x00); 
 AT45DB081_SPI_RW(0x00); 
 AT45DB081_SPI_RW(0x00);
     
 for(count=0;count<78;count++)
   {
      *(save_data)=AT45DB081_SPI_RW(0x00); //將讀到的數(shù)據(jù)存入指定地址中
    save_data++;
   }   
}
/****************************AT45DB081讀寫函數(shù)***************************/
/*函數(shù)原型:unsigned char AT45DB081_SPI_RW (unsigned char output)
/*函數(shù)功能:AT45DB081讀寫
/*輸入?yún)?shù):output 發(fā)送的數(shù)據(jù)
/*輸出參數(shù):input  接受到的數(shù)據(jù)
/*調(diào)用模塊:無
//作者：丁霄
/*建立時(shí)間:2006/08/26
/********************************************************************/
unsigned char AT45DB081_SPI_RW(unsigned char output)
{
 unsigned char input;
 
 SPI_DATA = output;       
 while((SPCFG&0x80)!=0x80); //查看數(shù)據(jù)是否發(fā)送完畢    
 input = SPI_DATA;
    SPCFG=SPCFG&0x7f; //清楚發(fā)送完畢標(biāo)志位 
    
 return input;       
}
/***************************AT45DB081頁擦除函數(shù)***************************/
/*函數(shù)原型:void AT45DB081_Page_E(unsigned int page_add)
/*函數(shù)功能:AT45DB081頁擦除
/*輸入?yún)?shù):page_add  要擦除的頁地址
/*輸出參數(shù):無
/*調(diào)用模塊:無
//作者：丁霄
/*建立時(shí)間:2006/09/04
/*********************************************************************/
void AT45DB081_Page_E(unsigned int page_add)  //頁擦除
{
    SS=1;
    SS=0;
    AT45DB081_SPI_RW(PAGE_E); //AT45DB081頁擦除
 AT45DB081_SPI_RW((unsigned char)(page_add>>(16-PageBits)));      
 AT45DB081_SPI_RW((unsigned char)(page_add<<(PageBits-8)));
 AT45DB081_SPI_RW(0x00);               
}
/***************************AT45DB081塊擦除函數(shù)***************************/
/*函數(shù)原型:void AT45DB081_Block_E(unsigned int block_add)
/*函數(shù)功能:AT45DB081塊擦除
/*輸入?yún)?shù):block_add  要擦除的塊地址
/*輸出參數(shù):無
/*調(diào)用模塊:無
//作者：丁霄
/*建立時(shí)間:2006/09/04
/*********************************************************************/
void AT45DB081_Block_E(unsigned int block_add)  //塊擦除
{
    SS=1;
    SS=0;
    AT45DB081_SPI_RW(BLOCK_E); //AT45DB081塊擦除
 AT45DB081_SPI_RW((unsigned char)(block_add<<3)); 
 AT45DB081_SPI_RW(0x00); 
AT45DB081_SPI_RW(0x00);               
}