?? at45d161d.c
字號:
// AT45D161.C
// ================================== FLASH 驅動函數文件 ================================================
#include "AT45D161D.h"
#include "Bos.h"
typedef enum
{
AT45C_ID = 0x9f,
AT45C_STATUS = 0xd7,
AT45C_BUF1READ = 0xd4,
AT45C_BUF2READ = 0xd6,
AT45C_ARRAYREAD = 0xe8,
AT45C_PAGEREAD = 0xd2,
AT45C_BUF1WRITE = 0x84,
AT45C_BUF2WRITE = 0x87,
AT45C_PAGEERASE = 0x81,
AT45C_BLOCKERASE = 0x50,
AT45C_BUF1TOPAGEEW = 0x83,
AT45C_BUF2TOPAGEEW = 0x86,
AT45C_BUF1TOPAGEW = 0x88,
AT45C_BUF2TOPAGEW = 0x89,
AT45C_PAGEBUFWRITE1 = 0x82,
AT45C_PAGEBUFWRITE2 = 0x85,
AT45C_PAGEREWRITEBUF1 = 0x58,
AT45C_PAGEREWRITEBUF2 = 0x59,
AT45C_PAGETOBUF1TRANS = 0x53,
AT45C_PAGETOBUF2TRANS = 0x55,
AT45C_PAGETOBUF1COMP = 0x60,
AT45C_PAGETOBUF2COMP = 0x61
} AT45CMD;
// 字符轉化函數
unsigned char HalfToASC(unsigned char cCh)
{
if(cCh >=0x00 && cCh <= 0x09)
return '0' + cCh;
else if(cCh >= 0x0a && cCh <= 0x0f)
return cCh - 0x0a + 'A';
else return ' ';
}
// 系統對SPI接口&FLASH初始化函數
void FLS_Init(unsigned char cCLKRate)
{
SPI0CFG = SPI_M_CLK1_POL0;//SPI_M_CLK1_POL1;
SPI0CN = 0x0D; // NSS,使能SPI
//SPI_NSS = false;
SPI0CKR = cCLKRate;
}
// SPI寫字節函數
void SPI_WriteByte(unsigned char cData)
{
SPI0DAT = cData;
while (!SPIF);
SPIF = false;
}
// SPI讀字節函數
unsigned char SPI_ReadByte()
{
SPI0DAT = 0x00;
while (!SPIF);
SPIF = false;
return (SPI0DAT);
}
// 讀FLASH的ID號函數
BOOL FLS_ReadID()
{
unsigned char i;
unsigned char nID[2] = {0} ;
NSSMD0 = false;
SPI_WriteByte(AT45C_ID);
for(i = 0;i < 2;i++)
nID[i] = SPI_ReadByte();
NSSMD0 = true;
if (*(unsigned int *)&nID[0] == AT45D161D_ID)
return true;
else
return false;
}
// 等待FLASH就緒狀態
unsigned char FLS_WaitRDY()
{
unsigned char cStatus;
unsigned int nCount;
for(nCount = 0; nCount < 5000; nCount++)
{
cStatus = FLS_GetStatus();
if (cStatus & AT45DB_RDY)
break;
}
return cStatus;
}
// 查詢狀態寄存器狀態
unsigned char FLS_GetStatus()
{
unsigned char cStatus = 0;
NSSMD0 = false;
SPI_WriteByte(AT45C_STATUS);
cStatus = SPI_ReadByte();
NSSMD0 = true;
//-----------debug------------------------------
/*putchar('+');
putchar(cStatus);
putchar(SPI0CN);
putchar(SPI0CFG);
putchar('+');*/
//----------------------------------------------
return cStatus;
}
// 按頁面讀函數
BOOL FLS_PageRead(unsigned int PageAddr, unsigned int ByteAddr, unsigned char *cBuf, unsigned int nCount)
{
unsigned char AB1, AB2, AB3;
PageAddr <<= 2;
AB1 = (PageAddr >> 8) & 0x3f;
AB2 = (PageAddr) & 0xfc;
AB2 |= ((ByteAddr >> 8) & 0x03);
AB3 = (ByteAddr) & 0xff;
NSSMD0 = false;
SPI_WriteByte(AT45C_PAGEREAD);
SPI_WriteByte(AB1);
SPI_WriteByte(AB2);
SPI_WriteByte(AB3);
SPI_WriteByte(0); // 4Bytes additional
SPI_WriteByte(0);
SPI_WriteByte(0);
SPI_WriteByte(0);
while (nCount--)
*cBuf++ = SPI_ReadByte();
NSSMD0 = true;
return false;
}
// 寫數據到FLASH緩存區1函數
BOOL FLS_Buf1Write(unsigned int ByteAddr, unsigned char *cBuf, unsigned int nCount)
{
unsigned char AB1, AB2, AB3;
AB1 = 0;
AB2 = (ByteAddr >> 8) & 0x03;
AB3 = (ByteAddr) & 0xff;
NSSMD0 = false;
SPI_WriteByte(AT45C_BUF1WRITE);
SPI_WriteByte(AB1);
SPI_WriteByte(AB2);
SPI_WriteByte(AB3);
while (nCount--)
SPI_WriteByte(*cBuf++);
NSSMD0 = true;
return false;
}
// FLASH頁擦除函數
BOOL FLS_PageErase(unsigned int PageAddr)
{
unsigned char AB1, AB2, AB3;
PageAddr <<= 2;
AB1 = (PageAddr >> 8) & 0x3f;
AB2 = (PageAddr) & 0xfc;
AB3 = 0;
NSSMD0 = false;
SPI_WriteByte(AT45C_PAGEERASE);
SPI_WriteByte(AB1);
SPI_WriteByte(AB2);
SPI_WriteByte(AB3);
NSSMD0 = true;
FLS_WaitRDY();
return false;
}
// FLASH緩存區1數據寫FLASH頁函數
BOOL FLS_Buf1ToPageW(unsigned int PageAddr)
{
unsigned char AB1, AB2, AB3;
PageAddr <<= 2;
AB1 = (PageAddr >> 8) & 0x3f;
AB2 = (PageAddr) & 0xfc;
AB3 = 0;
NSSMD0 = false;
SPI_WriteByte(AT45C_BUF1TOPAGEW);
SPI_WriteByte(AB1);
SPI_WriteByte(AB2);
SPI_WriteByte(AB3);
NSSMD0 = true;
FLS_WaitRDY();
return false;
}
// FLASH頁面數據到緩存區1操作函數
BOOL FLS_PageToBuf1Trans(unsigned int PageAddr)
{
unsigned char AB1, AB2, AB3;
PageAddr <<= 2;
AB1 = (PageAddr >> 8) & 0x3f;
AB2 = (PageAddr) & 0xfc;
AB3 = 0;
NSSMD0 = false;
SPI_WriteByte(AT45C_PAGETOBUF1TRANS);
SPI_WriteByte(AB1);
SPI_WriteByte(AB2);
SPI_WriteByte(AB3);
NSSMD0 = true;
FLS_WaitRDY();
return false;
}
// FLASH頁面數據和緩存區1的數據比較函數
BOOL FLS_PageToBuf1Comp(unsigned int PageAddr)
{
unsigned char AB1, AB2, AB3;
PageAddr <<= 2;
AB1 = (PageAddr >> 8) & 0x3f;
AB2 = (PageAddr) & 0xfc;
AB3 = 0;
NSSMD0 = false;
SPI_WriteByte(AT45C_PAGETOBUF1COMP);
SPI_WriteByte(AB1);
SPI_WriteByte(AB2);
SPI_WriteByte(AB3);
NSSMD0 = true;
return (FLS_WaitRDY() & AT45DB_COMP) ? false : true;
}
// 系統讀緩存區數據判斷是否需要擦除函數
BOOL FLS_Buf1NeedErase(unsigned long ByteAddr, unsigned char *cData, unsigned int nCount)
{
unsigned char AB1, AB2, AB3;
unsigned char c1, c2;
bool bOK;
AB1 = 0;
AB2 = (ByteAddr >> 8) & 0x03;
AB3 = (ByteAddr) & 0xff;
NSSMD0 = false;
SPI_WriteByte(AT45C_BUF1READ);
SPI_WriteByte(AB1);
SPI_WriteByte(AB2);
SPI_WriteByte(AB3);
SPI_WriteByte(0); // 1Bytes additional
for(bOK = false; nCount; nCount--)
{
c1 = SPI_ReadByte();
c2 = *cData++;
if ((c1 & c2) != c2) // Compare data
{
bOK = true;
break;
}
}
NSSMD0 = true;
return bOK;
}
unsigned int FLS_Read(unsigned long Address, void *cData, unsigned int nCount)
{
unsigned int PageAddr, ByteAddr;
unsigned long xdata Cnt, RealCnt;
unsigned char *p;
PageAddr = (unsigned int)(Address / AT45D161D_PAGESIZE);
ByteAddr = (unsigned int)(Address % AT45D161D_PAGESIZE);
for(p=(unsigned char *)cData,RealCnt=0;nCount;
RealCnt += Cnt,PageAddr++,ByteAddr=0,p += Cnt,nCount -= Cnt)
{
Cnt = (AT45D161D_PAGESIZE - ByteAddr);
Cnt = (Cnt <= nCount) ? Cnt : nCount;
FLS_PageRead(PageAddr, ByteAddr, (char *)p, Cnt);
}
return RealCnt;
}
//-----------------------------------------------------------------------------------
unsigned int FLS_Write(unsigned long Address, void *cData, unsigned int nCount)
{
bool bNeedErase;
unsigned int PageAddr, ByteAddr;
unsigned long xdata Cnt, RealCnt;
unsigned char *p;
PageAddr = (unsigned int)(Address / AT45D161D_PAGESIZE);
ByteAddr = (unsigned int)(Address % AT45D161D_PAGESIZE);
for(p=(unsigned char *)cData,RealCnt=0;nCount;
RealCnt+=Cnt,PageAddr++,ByteAddr=0,p+=Cnt,nCount-=Cnt)
{
Cnt = (AT45D161D_PAGESIZE - ByteAddr);
Cnt = (Cnt <= nCount) ? Cnt : nCount;
FLS_PageToBuf1Trans(PageAddr);
bNeedErase = FLS_Buf1NeedErase(ByteAddr, p, Cnt);
FLS_Buf1Write(ByteAddr, (unsigned char *)p, Cnt);
if (bNeedErase)
FLS_PageErase(PageAddr);
FLS_Buf1ToPageW(PageAddr);
if (!FLS_PageToBuf1Comp(PageAddr))
break;
}
return RealCnt;
}
//==================================== 備份函數 =============================================
// AT45DBXX 讀緩存1函數
/*BOOL FLS_Buf1Read(unsigned int ByteAddr, unsigned char *cBuf, unsigned int nCount)
{
unsigned char AB1, AB2, AB3;
AB1 = 0;
AB2 = (ByteAddr >> 8) & 0x03;
AB3 = (ByteAddr) & 0xff;
SPI_WriteByte(AT45C_BUF1READ);
SPI_WriteByte(AB1);
SPI_WriteByte(AB2);
SPI_WriteByte(AB3);
SPI_WriteByte(0);// 1Bytes additional
while (nCount--)
*cBuf++ = SPI_ReadByte();
return false;
}
// AT45DBXX 讀緩存2函數
BOOL FLS_Buf2Read(unsigned int ByteAddr, unsigned char *cBuf, unsigned int nCount)
{
unsigned char AB1, AB2, AB3;
AB1 = 0;
AB2 = (ByteAddr >> 8) & 0x03;
AB3 = (ByteAddr) & 0xff;
SPI_WriteByte(AT45C_BUF2READ);
SPI_WriteByte(AB1);
SPI_WriteByte(AB2);
SPI_WriteByte(AB3);
SPI_WriteByte(0);// 1Bytes additional
while (nCount--)
*cBuf++ = SPI_ReadByte();
return false;
}
// 連續隊列讀函數
BOOL FLS_ArrayRead(unsigned int PageAddr, unsigned int ByteAddr, unsigned char *cBuf, unsigned int nCount)
{
unsigned char AB1, AB2, AB3;
PageAddr <<= 2;
AB1 = (PageAddr >> 8) & 0x3f;
AB2 = (PageAddr) & 0xfc;
AB2 |= ((ByteAddr >> 8) & 0x03);
AB3 = (ByteAddr) & 0xff;
SPI_WriteByte(AT45C_ARRAYREAD);
SPI_WriteByte(AB1);
SPI_WriteByte(AB2);
SPI_WriteByte(AB3);
SPI_WriteByte(0); // 4Bytes additional
SPI_WriteByte(0);
SPI_WriteByte(0);
SPI_WriteByte(0);
while (nCount--)
*cBuf++ = SPI_ReadByte();
return false;
}
// 寫數據到FLASH緩存區2函數
BOOL FLS_Buf2Write(unsigned int ByteAddr, unsigned char *cBuf, unsigned int nCount)
{
char AB1, AB2, AB3;
AB1 = 0;
AB2 = (ByteAddr >> 8) & 0x03;
AB3 = (ByteAddr) & 0xff;
SPI_WriteByte(AT45C_BUF2WRITE);
SPI_WriteByte(AB1);
SPI_WriteByte(AB2);
SPI_WriteByte(AB3);
while (nCount--)
SPI_WriteByte(*cBuf++);
return false;
}
// FLASH塊擦除函數
BOOL AT45_BlockErase(unsigned int nBlock)
{
unsigned char AB1, AB2, AB3;
nBlock <<= 5;
AB1 = (nBlock >> 8) & 0x3f;
AB2 = (nBlock) & 0xe0;
AB3 = 0;
SPI_WriteByte(AT45C_BLOCKERASE);
SPI_WriteByte(AB1);
SPI_WriteByte(AB2);
SPI_WriteByte(AB3);
FLS_WaitRDY();
return false;
}
// 帶擦除功能的緩存區1數據寫FLASH函數
BOOL FLS_Buf1ToPageEW(unsigned int PageAddr)
{
unsigned char AB1, AB2, AB3;
PageAddr <<= 2;
AB1 = (PageAddr >> 8) & 0x3f;
AB2 = (PageAddr) & 0xfc;
AB3 = 0;
SPI_WriteByte(AT45C_BUF1TOPAGEEW);
SPI_WriteByte(AB1);
SPI_WriteByte(AB2);
SPI_WriteByte(AB3);
FLS_WaitRDY();
return false;
}
// 帶擦除功能的緩存區2數據寫FLASH函數
BOOL FLS_Buf2ToPageEW(unsigned int PageAddr)
{
unsigned char AB1, AB2, AB3;
PageAddr <<= 2;
AB1 = (PageAddr >> 8) & 0x3f;
AB2 = (PageAddr) & 0xfc;
AB3 = 0;
SPI_WriteByte(AT45C_BUF2TOPAGEEW);
SPI_WriteByte(AB1);
SPI_WriteByte(AB2);
SPI_WriteByte(AB3);
FLS_WaitRDY();
return false;
}
// FLASH頁面數據和緩存區2的數據比較函數
BOOL FLS_PageToBuf2Comp(unsigned int PageAddr)
{
unsigned char AB1, AB2, AB3;
PageAddr <<= 2;
AB1 = (PageAddr >> 8) & 0x3f;
AB2 = (PageAddr) & 0xfc;
AB3 = 0;
SPI_WriteByte(AT45C_PAGETOBUF2COMP);
SPI_WriteByte(AB1);
SPI_WriteByte(AB2);
SPI_WriteByte(AB3);
return (FLS_WaitRDY() & AT45DB_COMP) ? false : true;
}
// FLASH頁面數據到緩存區2操作函數
BOOL FLS_PageToBuf2Trans(unsigned int PageAddr)
{
unsigned char AB1, AB2, AB3;
PageAddr <<= 2;
AB1 = (PageAddr >> 8) & 0x3f;
AB2 = (PageAddr) & 0xfc;
AB3 = 0;
SPI_WriteByte(AT45C_PAGETOBUF2TRANS);
SPI_WriteByte(AB1);
SPI_WriteByte(AB2);
SPI_WriteByte(AB3);
FLS_WaitRDY();
return false;
}
// FLASH緩存區1數據寫FLASH頁函數
BOOL FLS_Buf2ToPageW(unsigned int PageAddr)
{
unsigned char AB1, AB2, AB3;
PageAddr <<= 2;
AB1 = (PageAddr >> 8) & 0x3f;
AB2 = (PageAddr) & 0xfc;
AB3 = 0;
SPI_WriteByte(AT45C_BUF2TOPAGEW);
SPI_WriteByte(AB1);
SPI_WriteByte(AB2);
SPI_WriteByte(AB3);
FLS_WaitRDY();
return false;
}
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