/*******************************************************************************
* 51hei版权所有,未经允许,不得发表及作为它用!
* File Name : AT45DB642D.c
* Author : XiaoShm
* Version : V1.0
* Date : 8/29/2012
* Description :
* Last Modefly Date : 8/31/2012
*******************************************************************************/
#include "stm32f10x.h"
#include "stm32f10x_gpio.h"
#include "InitDevice.h"
#include"at45db642d.h"
//AT45DB有两个缓冲区Buffer1和Buffer2 (SRAM),此处只使用buffer1
/******************************
*opcode-操作码
******************************/
//读取状态的操作码
#define Status_Register_Opcode 0xD7
//读取ID的操作码
#define Device_ID_Opcode 0x9F
//Write to buffer
#define Write_Data_to_Buffer1 0x84//0x84,0x87
//Write buffer to page
#define Write_Buffer1_to_Page_whin_Erase 0x83
//Continuous Array Read
#define Continuous_Array_Read_Command 0xe8//0x03//0x0b//0xe8
#define Deep_Power_Down 0xb9
#define Resume_from_Deep_Power_Down 0xab
#define Main_MemoryPage_to_Buffer1_Transfer 0x53
#define Auto_Page_Rewrite_through_Buffer1 0x58
#define Main_Memory_Page_Pro_Through_Buff1 0x82
#define DF_FullSize 0x7fffff//8M byte
#define DF_PageSize 0x400//页大小
#ifdef TEST_AT45DB
#define TESTBASE 0X2000
u32 TestAddr = TESTBASE;
u8 TestBuffer[256] ={0};
#endif
//======================================================================
//函数名称:DF_SpiRxByte(void)
//输入:
//输出:
//函数功能:通过SPI接从AT45DB读一字节数据
//======================================================================
u8 DF_SpiRxByte(void)
{
u8 i = 0, rdat = 0;
for(i = 0; i < 8; i ++)
{
rdat <<= 1;
GPIO_SetBits(GPIOC, FSCK);
if(GPIO_ReadInputDataBit(GPIOC, FSDO))
{
rdat |= 0x01;
}
GPIO_ResetBits(GPIOC, FSCK);
}
return rdat;
}
//======================================================================
//函数名称:DF_SpiTxByte(u8 dat)
//输入:data待写入的数据
//输出:
//函数功能:通过SPI接口向AT45DB写入一字节数据
//======================================================================
void DF_SpiTxByte(u8 dat)
{
u8 i = 0, sdat = 0;
sdat = dat;
for(i = 0; i < 8; i ++)
{
if(sdat & 0x80)
{
GPIO_SetBits(GPIOC, FSDI);
}
else
{
GPIO_ResetBits(GPIOC, FSDI);
}
GPIO_SetBits(GPIOC, FSCK);
sdat <<= 1;
GPIO_ResetBits(GPIOC, FSCK);
}
}
//======================================================================
//函数名称:Enable_DFLASH(void)
//输入:
//输出:
//函数功能:使能FLASH(低电平使能)
//======================================================================
void Enable_DFLASH(void)
{
u8 i = 5;
GPIO_ResetBits(GPIOC, FCS);
while(i --);
}
//======================================================================
//函数名称:Disable_DFLASH(void)
//输入:
//输出:
//函数功能:禁止FLASH(高电平禁止)
//======================================================================
void Disable_DFLASH(void)
{
u8 i = 5;
GPIO_SetBits(GPIOC, FCS);
while(i --); //延长上一次高电平时间
}
//=========================================================================================
//*Status Register Format: *
//* -----------------------------------------------------------------------
//* bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 *
//* -------- -------- -------- -------- -------- -------- -------- -------- *
//* RDY/BUSY COMP 0 1 1 1 X X *
//* ----------------------------------------------------------------------- *
//* bit7 - 忙标记,0为忙1为不忙。 *
//* 当Status Register的位0移出之后,接下来的时钟脉冲序列将使SPI器件继续*
//* 将最新的状态字节送出。 */
//* bit6 - 标记最近一次Main Memory Page和Buffer的比较结果,0相同,1不同。 *
//* bit5 *
//* bit4 *
//* bit3 *
//* bit2 - 这4位用来标记器件密度,对于AT45DB041B,这4位应该是0111,一共能标记
//* 16种不同密度的器件。
//* bit1
//* bit0 - 这2位暂时无效
//=======================================================================================
u8 DF_ReadStatus(void)
{
u8 i = 0;
Enable_DFLASH();
DF_SpiTxByte(Status_Register_Opcode);
i = DF_SpiRxByte();/////////////////****************//////////////////
Disable_DFLASH();
return i;
}
//======================================================================
//函数名称:DF_Check_Busy_State(void)
//输入:
//输出:
//函数功能:读取FLASH忙标志位(最多判断255次,不行还是返回且返回0)
//======================================================================
u8 DF_Check_Busy_State(void)
{
u8 state = 0;
u8 i = 255;
while(i)
{
state = DF_ReadStatus();
if(state & 0x80) break; //读取的最高位0时器件忙
--i;
DelayNInstruct(100);
}
return i;
}
//************************************************************
//*读取FLASH的页大小
//*返回1表示每一页的大小为1024 bytes,否则为1056 bytes
//************************************************************
u8 DF_Check_Page_Size(void)
{
u8 Page_Size = 0;
Page_Size = DF_ReadStatus();
if(Page_Size & 0x01) return 1;
return 0;
}
//======================================================================
//函数名称:DF_Deep_Power_Down(void)
//输入:
//输出:
//函数功能:使FLASH进入DeepPowerDown模式
//======================================================================
void DF_Deep_Power_Down(void)
{
Enable_DFLASH();
DF_SpiTxByte(Deep_Power_Down);
Disable_DFLASH();
}
//======================================================================
//函数名称:DFLASH_Resume_from_Deep_Power_Down(void)
//输入:
//输出:
//函数功能:将FLASH从DeepPowerDown模式唤醒
//======================================================================
void DF_Resume_from_Deep_Power_Down(void)
{
Enable_DFLASH();
DF_SpiTxByte(Resume_from_Deep_Power_Down);
Disable_DFLASH();
}
//************************************************************
//*配置FLASH页大小为1024bytes
//************************************************************
void DF_Configer_Binary_Page_Size(void)
{
u8 i = 0, j = 0;
u8 Power_of_Two_Page_Size_Command[4]={0x3d,0x2a,0x80,0xa6};
while(j < 5)
{
if(!DF_Check_Page_Size())
{//如果页大小为1056 bytes,则配置为1024 bytes
DF_Check_Busy_State();
Enable_DFLASH();
for(i=0;i<4;i++)
{
DF_SpiTxByte(Power_of_Two_Page_Size_Command[i]);//
}
Disable_DFLASH();
DelayNmsTime(10);
DF_Check_Busy_State();
DelayNmsTime(5);
DF_Deep_Power_Down();
DelayNmsTime(5);
DF_Resume_from_Deep_Power_Down();
DelayNmsTime(1);
}
else
{//已经为1024则不用再配置
break;
}
j ++;
}
}
//************************************************************
//*使能扇区保护
//************************************************************
void DF_Enable_Sector_Protection(void)
{
u8 Enable_Sector_Protection_Command[4]={0x3D,0x2A,0x7F,0xA9}; //使能扇区保护操作码
u8 i;
DF_Check_Busy_State();
Enable_DFLASH();
for(i=0;i<4;i++)
{
DF_SpiTxByte(Enable_Sector_Protection_Command[i]);//写使能扇区保护操作码
}
Disable_DFLASH();
}
//======================================================================
//函数名称:
//输入:
//输出:
//函数功能:禁止扇区保护
//======================================================================
void DF_Disable_Sector_Protection(void)
{
u8 Disable_Sector_Protection_Command[4]={0x3D,0x2A,0x7F,0x9A};//禁止扇区保护操作码
u8 i;
DF_Check_Busy_State();
Enable_DFLASH();
for(i=0;i<4;i++)
{
DF_SpiTxByte(Disable_Sector_Protection_Command[i]);//写禁止扇区保护操作码
}
Disable_DFLASH();
}
//======================================================================
//函数名称:
//输入:各扇区保护字0---unprotected 0xff---protected,32byte refer to 32 sector
//输出:
//函数功能:设置扇区保护 注意:会改变BUFFER1中的内容
//======================================================================
void DF_Program_Sector_Protection_Register(u8 *Sector_Protection_Register)
{
u8 Program_Sector_Protection_Command[4]={0x3D,0x2A,0x7F,0xFC};//设置扇区保护操作码
u8 i;
DF_Check_Busy_State();
Enable_DFLASH();
for(i=0;i<4;i++)
{
DF_SpiTxByte(Program_Sector_Protection_Command[i]);//写设置扇区保护操作码
}
for(i=0;i<32;i++)
{
DF_SpiTxByte(Sector_Protection_Register[i]);//写设置扇区保护数据
}
Disable_DFLASH();
}
//======================================================================
//函数名称:
//输入:
//输出:
//函数功能:读取扇区保护寄存器内容(返回32个字节,对应32个扇区的情况)
//======================================================================
void DF_Read_Sector_Protection_Register(u8 *Sector_Protection_Register)
{
u8 Read_Sector_Protection_Register_Command[4]={0x32,0,0,0};
u8 i;
DF_Check_Busy_State();
Enable_DFLASH();
for(i=0;i<4;i++)//write
{
DF_SpiTxByte(Read_Sector_Protection_Register_Command[i]);
}
for(i=0;i<32;i++)//read
{
Sector_Protection_Register[i] = DF_SpiRxByte();
}
Disable_DFLASH();
}
//************************************************************
//*取消所有扇区保护
//*返回1表示成功取消扇区所以保护
//************************************************************
u8 DF_Cancel_Sector_Protection(void)
{
u8 Sector_Protection_Register_for_Write[32]={0,0,0,0,0,0,0,0};//写入0为去保护
u8 Sector_Protection_Register_for_Read[32]={1,1,1,1,1,1,1,1};//防止默认值为0
u16 i;
u8 j=1;
//使能扇区保护
DF_Enable_Sector_Protection();
//设置扇区保护
DF_Program_Sector_Protection_Register(Sector_Protection_Register_for_Write);
//读取扇区保护寄存器内容
DF_Read_Sector_Protection_Register(Sector_Protection_Register_for_Read);
//判断扇区保护寄存器内容
for(i=0;i<8;i++)
{
if(Sector_Protection_Register_for_Read[i] != 0) j++;
}
//禁止扇区保护
DF_Disable_Sector_Protection();
return j;
}
//=============================================================================
//函数名称:DF_ContinusArrayRead(UIN32 readaddr,u8 *readbuff,u16 len)
//输入:readaddr指定数据在FLASH中的存储地址,指定数据的首地址,指定数据的长度
//输出:readbuf指定数据暂存区的首地址
//函数功能:从FLASH主存readaddr地址处连续读取len字节数据
//=============================================================================
void DF_ContinusArrayRead(u32 readaddr,u8 *readbuff,u16 len)
{
u16 i;
DF_Check_Busy_State();
Enable_DFLASH();
DF_SpiTxByte(Continuous_Array_Read_Command);
DF_SpiTxByte((u8)((readaddr >> 16) & 0xff));
DF_SpiTxByte((u8)((readaddr >> 8) & 0xff));
DF_SpiTxByte((u8)(readaddr & 0xff));
for(i = 0 ; i < 4 ; i ++)
{
DF_SpiTxByte(0x00);
}
for(i = 0 ; i < len ; i ++)
{
readbuff[i] = DF_SpiRxByte();
}
Disable_DFLASH();
}
//=============================================================================
//函数名称:DF_BufferWrite(u8 bufferaddr,u8 *writebuff,u16 len)
//输入:BUFFER中的起始地址, 待存数据的头指针,待存数据的长度1~1024
//输出:
//函数功能:将指定数据写入从某个地址(0~1023)开始的BUFFER1中
//=============================================================================
void DF_BufferWrite(u16 bufferaddr,u8 *writebuff,u16 len)
{
u16 i;
DF_Check_Busy_State();
Enable_DFLASH();
DF_SpiTxByte(Write_Data_to_Buffer1);
DF_SpiTxByte(0x00);
DF_SpiTxByte((u8)((bufferaddr >> 8) & 0x03));
DF_SpiTxByte((u8)(bufferaddr & 0xff));
for(i = 0 ; i < len ; i ++ )
{
DF_SpiTxByte(writebuff[i]);
}
Disable_DFLASH();
}
//=============================================================================
//函数名称:DF_BufferToMainMemoryWithErase(u16 pageaddr,u8 buffaddr,u8 *writebuff,u16 len)
//输入:BUFFER中的起始地址, 待存数据的头指针,待存数据的长度1~1024
//输出:
//函数功能:将指定数据写入从某个地址(0~1023)开始的BUFFER1中:包含2个动作,首先将
//指定数据写入到BUFFER 1中,其中可以指定BUFFER中的起始写入地址,此写入动作不影响
//BUFFER中其它地址中的数据,然后再将BUFFER中的整个数据写入到某指定页中(带预擦除)。
//=============================================================================
void DF_BufferToMainMemoryWithErase(u16 pageaddr,u16 buffaddr,u8 *writebuff,u16 len)
{
DF_BufferWrite(buffaddr,writebuff,len);
DF_Check_Busy_State();
Enable_DFLASH();
DF_SpiTxByte(Write_Buffer1_to_Page_whin_Erase);
DF_SpiTxByte((u8)((pageaddr >> 8) & 0x7f));
DF_SpiTxByte((u8)(pageaddr & 0xfc));
DF_SpiTxByte(0x00);
DelayNmsTime(40);
Disable_DFLASH();
}
//======================================================================
//函数名称:DF_MainMemoryPageProgramThroughBuffer(u32 writeaddr, u8 *writebuff, u16 len)
//输入:riteaddr---待写入地址,writebuff数据指针,len数据长度
//输出:
//函数功能:通过BUF1写主存,包含动作:先将1-1024字节数据写入BUF1,然后进行
//BUF1到主存的带擦除编程
//==================================================================
void DF_MainMemoryPageProgramThroughBuffer(u32 writeaddr, u8 *writebuff, u16 len)
{
u16 i = 0;
DF_Check_Busy_State();
Enable_DFLASH();
DF_SpiTxByte(Main_Memory_Page_Pro_Through_Buff1);
DF_SpiTxByte((u8)((writeaddr >> 16) & 0xff));
DF_SpiTxByte((u8)((writeaddr >> 8) & 0xff));
DF_SpiTxByte((u8)(writeaddr & 0xff));
for(i = 0 ; i < len ; i ++ )
{
DF_SpiTxByte(writebuff[i]);
}
DelayNmsTime(40);
Disable_DFLASH();
}
//========================================================================================
//函数名称:DF_MainMemoryPagetoBufferTransfer(u16 pageaddr)
//输入:pageaddr
//输出:
//函数功能:
//==========================================================================================
void DF_MainMemoryPagetoBufferTransfer(u16 pageaddr)
{
DF_Check_Busy_State();
Enable_DFLASH();
DF_SpiTxByte(Main_MemoryPage_to_Buffer1_Transfer);
DF_SpiTxByte((u8)((pageaddr >> 8) & 0x7f));
DF_SpiTxByte((u8)(pageaddr & 0xfc));
DF_SpiTxByte(0x00);
Disable_DFLASH();
}
//========================================================================================
//函数名称:
//输入:
//输出:
//函数功能:
//==========================================================================================
void DF_AutoPageRewriteThroughBuffer(u16 pageaddr)
{
DF_Check_Busy_State();
Enable_DFLASH();
DF_SpiTxByte(Auto_Page_Rewrite_through_Buffer1);
DF_SpiTxByte((u8)((pageaddr >> 8) & 0x7f));
DF_SpiTxByte((u8)(pageaddr & 0xfc));
DF_SpiTxByte(0x00);
Disable_DFLASH();
DelayNmsTime(18);
}
//=========================================================================================
//函数名称:DF_Chip_Erase(void)
//输入:
//输出:
//函数功能:整片擦除FLASH全部内容
//==========================================================================================
void DF_Chip_Erase(void)
{
u8 Chip_Erase_Command[4] = {0xC7,0x94,0x80,0x9A};//整片擦除操作码
u8 i;
DF_Check_Busy_State();
Enable_DFLASH();
for(i = 0 ; i < 4 ; i ++)
{
DF_SpiTxByte(Chip_Erase_Command[i]);
}
Disable_DFLASH();
}
//=========================================================================================
//函数名称:
//输入:
//输出:
//函数功能:读取制造ID,确认是否有DATAFLASH存在,存在返回1,否则返回0
//==========================================================================================
u8 DF_ReadManufactureIDInformation(void)
{
u8 i = 0;
u8 Idbuff[4] = {0};
DF_Check_Busy_State();
Enable_DFLASH();
DF_SpiTxByte(Device_ID_Opcode);
for(i = 0 ; i < 4 ; i ++)
{
Idbuff[i] = DF_SpiRxByte();
}
Disable_DFLASH();
if((Idbuff[0] == 0x1f) && (Idbuff[1] == 0x28))
{
return 1;
}
else
{
return 0;
}
}
//=========================================================================================
//函数名称:
//输入:
//输出:
//函数功能:初始化DataFlash,检查制造ID,配置为1024字节每page,禁止扇区保护
//==========================================================================================
void DF_Init(void)
{
u8 i = 0;
GPIO_SetBits(GPIOC, FCS);
GPIO_ResetBits(GPIOC, FSCK);//AT45DB选择SPI方式0
GPIO_ResetBits(GPIOC, FSDI);
i = DF_Check_Busy_State();
if(DF_ReadManufactureIDInformation())
{
DF_Configer_Binary_Page_Size();
i = DF_Cancel_Sector_Protection();
}
else
{//未检测到DF,则给出提示报警信息
i = 0;
while(i < 50)
{
i ++;
}
BeepTim = 100;
}
}
//=========================================================================================
//函数名称:SaveDataToFlash(u32 *pBuffer, u32 cnt, u32 addr)
//输入:pBuffer-数据缓冲区首址,cnt-写入字节数,WriteAddr-保存地址
//输出:保存成功与否
//函数功能:将任意字节(小于0X800000)数据保存入FLASH任意地址
//==========================================================================================
u8 SaveDataToFlash(u8 *pBuffer, u32 sizlen, u32 WriteAddr)
{
u32 NumOfPage = 0, NumOfSingle = 0, Addr = 0, count = 0;
u16 paddr = 0;
if(WriteAddr + sizlen >= DF_FullSize)
{//如果 超出地址
return 0;
}
Addr = WriteAddr % DF_PageSize;
count = DF_PageSize - Addr;
NumOfPage = sizlen / DF_PageSize;
NumOfSingle = sizlen % DF_PageSize;
/* If WriteAddr is DF_PageSize aligned */
if(Addr == 0)
{//地址为整页起始地址
/* If sizlen < DF_PageSize */
if(NumOfPage == 0)
{//不够一页
paddr = (u16)((WriteAddr >> 8) & 0xfffc);//查找页地址
DF_MainMemoryPagetoBufferTransfer(paddr);
DF_MainMemoryPageProgramThroughBuffer(WriteAddr,pBuffer,NumOfSingle);
DF_AutoPageRewriteThroughBuffer(paddr);
}
/* If sizlen > DF_PageSize */
else
{//超出一页
while(NumOfPage--)
{//先写整页
paddr = (u16)((WriteAddr >> 8) & 0xfffc);//查找页地址
DF_MainMemoryPagetoBufferTransfer(paddr);
DF_MainMemoryPageProgramThroughBuffer(WriteAddr,pBuffer,DF_PageSize);
DF_AutoPageRewriteThroughBuffer(paddr);
WriteAddr += DF_PageSize;
pBuffer += DF_PageSize;
}//再写余下部分
if(NumOfSingle!=0)
{
paddr = (u16)((WriteAddr >> 8) & 0xfffc);//查找页地址
DF_MainMemoryPagetoBufferTransfer(paddr);
DF_MainMemoryPageProgramThroughBuffer(WriteAddr,pBuffer,NumOfSingle);
DF_AutoPageRewriteThroughBuffer(paddr);
}
}
}
/* If WriteAddr is not DF_PageSize aligned */
else
{//起始地址非整页地址
/* If sizlen < DF_PageSize */
if(NumOfPage== 0)
{//不超过一页
if(NumOfSingle > count)
{//产生跨页
paddr = (u16)((WriteAddr >> 8) & 0xfffc);//查找页地址
DF_MainMemoryPagetoBufferTransfer(paddr);
DF_MainMemoryPageProgramThroughBuffer(WriteAddr,pBuffer,count);
DF_AutoPageRewriteThroughBuffer(paddr);
NumOfSingle -= count;
WriteAddr += count;
pBuffer += count;
paddr = (u16)((WriteAddr >> 8) & 0xfffc);//查找页地址
DF_MainMemoryPagetoBufferTransfer(paddr);
DF_MainMemoryPageProgramThroughBuffer(WriteAddr,pBuffer,NumOfSingle);
DF_AutoPageRewriteThroughBuffer(paddr);
}
else
{//不产生跨页
paddr = (u16)((WriteAddr >> 8) & 0xfffc);//查找页地址
DF_MainMemoryPagetoBufferTransfer(paddr);
DF_MainMemoryPageProgramThroughBuffer(WriteAddr,pBuffer,NumOfSingle);
DF_AutoPageRewriteThroughBuffer(paddr);
}
}
/* If sizlen > DF_PageSize */
else
{//超过一页
sizlen -= count;
NumOfPage = sizlen / DF_PageSize;
NumOfSingle = sizlen % DF_PageSize;
if(count != 0)
{
paddr = (u16)((WriteAddr >> 8) & 0xfffc);//查找页地址
DF_MainMemoryPagetoBufferTransfer(paddr);
DF_MainMemoryPageProgramThroughBuffer(WriteAddr,pBuffer,count);
DF_AutoPageRewriteThroughBuffer(paddr);
WriteAddr += count;
pBuffer += count;
}
while(NumOfPage--)
{
paddr = (u16)((WriteAddr >> 8) & 0xfffc);//查找页地址
DF_MainMemoryPagetoBufferTransfer(paddr);
DF_MainMemoryPageProgramThroughBuffer(WriteAddr,pBuffer,DF_PageSize);
DF_AutoPageRewriteThroughBuffer(paddr);
WriteAddr += DF_PageSize;
pBuffer += DF_PageSize;
}
if(NumOfSingle != 0)
{
paddr = (u16)((WriteAddr >> 8) & 0xfffc);//查找页地址
DF_MainMemoryPagetoBufferTransfer(paddr);
DF_MainMemoryPageProgramThroughBuffer(WriteAddr,pBuffer,NumOfSingle);
DF_AutoPageRewriteThroughBuffer(paddr);
}
}
}
return 1;
}
//=========================================================================================
//函数名称:GetFlashData(u32 readdr, u8 *pBuffer, u16 sizlen)
//输入:readdr-读取地址,pBuffer-读取数据缓存地址,sizlen-数据字节数
//输出:
//函数功能:从FLASH任意(0-0X7FFFFF)地址读取任意字节(0-65535)数据
//==========================================================================================
u8 GetFlashData(u32 readdr, u8 *pBuffer, u16 sizlen)
{
if(readdr + sizlen >= DF_FullSize)
{//如果 超出地址
return 0;
}
DF_ContinusArrayRead(readdr,pBuffer,sizlen);
return 1;
}
//=========================================================================================
//函数名称:
//输入:
//输出:
//函数功能:测试读写DATAFLASH
//==========================================================================================
void Test_At45db642d(void)
{
#ifdef TEST_AT45DB
u16 paddr = 0;
u8 i = 0;
if(TestAddr < TESTBASE + 0x2000)
{
for(i = 0; i < 32; i ++)
{
TestBuffer[i] = i;
}
paddr = (u16)((TestAddr >> 8) & 0xfffc);
DF_MainMemoryPagetoBufferTransfer(paddr);
DF_MainMemoryPageProgramThroughBuffer(TestAddr,TestBuffer,32);
DF_AutoPageRewriteThroughBuffer(paddr);
for(i = 0; i < 250; i ++)
{
TestBuffer[i] = 0;
}
DF_ContinusArrayRead(TestAddr-32,TestBuffer,96);
TestAddr += 32;
}
#endif
}