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請指點(diǎn)一下，關(guān)于at45db041b的讀寫

作者：delay　欄目：單片機(jī)

請指點(diǎn)一下，關(guān)于AT45DB041B的讀寫
關(guān)于main MEMORY page program through buffer
void FLASHAutoProgViaBuffer1(uchar *buffer,uint len,uint page,uint start_addr) //將指定數(shù)據(jù)通過緩存1寫入FLASH指定位置(先擦除)
{
           uint  i;
        uchar idata get;
         SPI45D041_SK=0;
         SPI45D041_CS=0;
                          //緩沖區(qū)1為84H  緩沖區(qū)2為87H
       WriteByte(0x82,8);
       WriteByte(0x00,3);// fill 3 sk,don\'t care.
       WriteByte( (uchar)(page>>8) , 4 );//send 12 bit address to 45D081
       WriteByte( (uchar)(page) , 8 );
       WriteByte((start_addr>>8) , 1 );
       WriteByte(start_addr,8 );//fill 8 bits blank
           for (i=0;i<len;i++)
         {
             WriteByte(buffer[i],8);
          }
       SPI45D041_CS=1;
         get=GetFLASHStatus();// check if FLASH is busy//
       while(!(get&0x80)) ;

}

請幫忙看一下，這個函數(shù)對嗎？為什么再程序中不走呢？謝謝！

2樓：

>>參與討論

作者： cywiner 于 2005/5/26 11:47:00 發(fā)布：

這是我的一個代碼
希望能對你有用，這個代碼在keil中編譯，在硬件中測試通過，但沒有在市場上使用。

//memory.c
//編寫一個對at45d系列操作的庫,大模式編譯
//說明每個指令時間為1us時調(diào)試通過
//
//為了在投幣式加油機(jī)項(xiàng)目的需要，編寫該庫函數(shù)。
//20040610完成該庫的編寫
//cywiner

#include <intrins.h>
#include <REG51F.H>
#include <string.h>

#define CLOCK_FRIQUENCY    12000000L
#define OPT_CYC            1                //單指令時間為 1 us
#define MEM_PAGESIZE    264
#define MEM_BLOCKPAGE    8
#define MEM_BLOCKNUM    256        //AT45D041
//#define MEM_BLOCKNUM    128        //AT45D021
//總大小 MEM_PAGESIZE * MEM_BLOCKPAGE * MEM_BLOCKNUM
//接口

sbit FMCK    = P3^6;
sbit FMDO    = P3^4;
sbit FMDI    = P3^5;
sbit FMCS    = P2^6;

sbit CTR_E    = P2^3;

#define STATR_MEM_OPT    CTR_E = 1;
#define END_MEM_OPT        CTR_E = 0;

#define INTERRUPT_DISABLE    EA = 0
#define INTERRUPT_ENABLE    EA = 1

#define CKUP    FMCK = 1;
#define CKDOW    FMCK = 0;
#define CSON    FMCS = 0;
#define CSOFF    FMCS = 1;

void WriteFMByte(unsigned CHAR ucByte)
{//92指令
    unsigned CHAR m;
    INTERRUPT_DISABLE;
    STATR_MEM_OPT;
    m = 0;
    for(;m<8;m++)
    {
        CKDOW;//開始時CKUP
        FMDI = ucByte&0x80;
        ucByte = ACC;
        CKUP;
    }
    END_MEM_OPT;
    INTERRUPT_ENABLE;
}
unsigned CHAR ReadFMByte()
{//100指令
    unsigned CHAR ucByte,m;
    INTERRUPT_DISABLE;
    STATR_MEM_OPT;
    for(m = 0;m<8;m++)
    {
        CKDOW;
        CKUP;
        ucByte <<= 1;
        if(FMDO)ucByte++;
    }
    END_MEM_OPT;
    INTERRUPT_ENABLE;
    return ucByte;
}

unsigned CHAR ReadStatus()
{//200指令
    unsigned CHAR ucByte;
    CSON;
    //tcss 250 ns
    //optcode = 57:0101 0111
    WriteFMByte(0x57);
    ucByte = ReadFMByte();
    CSOFF;
    return ucByte;
/*    ucByte = 0x57;
    for(n = 0;n<8;n++)
    {
        CKDOW;
        FMDI = ucByte & 0x80;
        ucByte = ACC;
        CKUP;
    }
    for(n = 0;n<8;n++)
    {
        CKDOW;
        CKUP;
        CY = FMDO;
        ACC >>= 1;
    //    ucByte <<= 1;
    //    if(FMDO)ucByte++;
    }
    CSOFF;
    return ACC;
*/}
//return 0
unsigned CHAR BufferRead(unsigned CHAR ucIndex,unsigned int uiAdd,unsigned CHAR* pucBuffer,unsigned int uiLen)
{
    unsigned int uiCount;
    CKUP;
    CSON;
    if(ucIndex == 1)WriteFMByte( 0x54);        //buffer1Read
    else WriteFMByte( 0x56);                //buffer2Read
    WriteFMByte(0);
    WriteFMByte(uiAdd/256);
    WriteFMByte(uiAdd%256);

    for(uiCount = 0;uiCount<(40-8*3-8);uiCount++)
    {
        CKDOW;
        CKUP;
    }
    for(uiCount = 0;uiCount<uiLen;uiCount++)
    {
        pucBuffer[uiCount] = ReadFMByte();
    }
    CSOFF;
    return 0;
}
void BufferWrite(unsigned ucIndex,unsigned int uiAdd,unsigned CHAR* pucBuffer,unsigned int uiLen)
{//
    unsigned int uiCount;
    CKUP;
    CSON;
    if(ucIndex == 1)    WriteFMByte(0x84);
    else                WriteFMByte(0x87);
    WriteFMByte(0);
    WriteFMByte(uiAdd/256);
    WriteFMByte(uiAdd%256);

    for(uiCount = 0;uiCount<= (uiLen-1);uiCount++)
    {
        WriteFMByte(pucBuffer[uiCount]);
    }
    CSOFF;
    //檢查是否成功
    uiCount=0;
    while(0 == (0x80 & ReadStatus()))uiCount++;//0
}
//ucFlag = 0 ,帶擦除，其他不帶插除
unsigned CHAR BufferToMain(unsigned CHAR ucIndex,unsigned int uiPage,unsigned CHAR ucFlag)
{//帶擦除 = 0x34 * 206 +482 = 11190 us
//不擦除  = 0x18 * 206 +482 = 5426us
    unsigned CHAR ucData,ucTemp;
    ucData = uiPage / 128;
    ucTemp = uiPage<<1;// % 128)*2;

    CKUP;
    CSON;
if(ucFlag)
{
    if(ucIndex == 1)WriteFMByte( 0x88);        //buffer1to main 不擦除
    else WriteFMByte( 0x89);                //buffer2to main
}
else
{
    if(ucIndex == 1)WriteFMByte( 0x83);        //buffer1to main
    else WriteFMByte( 0x86);                //buffer2to main
}
    Wri

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