📄 at45db041d._c
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for(i=0;i<4;i++)//write
{
SPI_Write_Byte(Read_Sector_Lockdown_Register[i]);
}
for(i=0;i<8;i++)//read
{
Sector_Lockdown_Register[i] = SPI_Read_Byte(0);
}
Disable_DFLASH();
}
/************************************************************
*写数据到缓冲器(Buffer1或Buffer2)(缓冲器大小为264 bytes)
*BufferX :选择缓冲器(Buffer1或Buffer2)
*BFA :Buffer内存地址 0~263
*wData :要写入的数据
*wDataSize :要写入的数据长度(1~264)
************************************************************/
void DF_Write_to_Buffer(unsigned char BufferX,unsigned int BFA,
unsigned char *wData,unsigned int wDataSize)
{
unsigned int i;
DF_Check_Busy_State(); //check busy bit
Enable_DFLASH();
if(BufferX == Buffer1) SPI_Write_Byte(Write_Data_to_Buffer1);//0x84
else SPI_Write_Byte(Write_Data_to_Buffer2);//0x87
//Page Size (264 Bytes)
//15 don't care bits + 9 addrress
SPI_Write_Byte(0xFF); //8 can't care bits
SPI_Write_Byte((unsigned char)(BFA>>8)); //7 can't care bits + 1 bit address
SPI_Write_Byte((unsigned char)BFA); //address
for(i=0;i<wDataSize;i++) SPI_Write_Byte(wData[i]);//写入数据
Disable_DFLASH();
}
/************************************************************
*读取缓冲器(Buffer1或Buffer2)(缓冲器大小为264 bytes)中的数据
*BufferX :选择缓冲器(Buffer1或Buffer2)
*BFA :Buffer内存地址 0~263
*wData :存放读到的数据
*wDataSize :要写入的数据长度(1~264)
*注意:高速和低速发的操作码和要发送的数据长度不同
************************************************************/
void DF_Read_from_Buffer(unsigned char BufferX,unsigned int BFA,
unsigned char *rData,unsigned int rDataLen)
{
unsigned int i;
DF_Check_Busy_State(); //check busy bit
Enable_DFLASH();
if(BufferX == Buffer1) SPI_Write_Byte(Read_Data_from_Buffer1);//0xD4 or 0xD1(lower frequency)
else SPI_Write_Byte(Read_Data_from_Buffer2);//0xD6 or 0xD3(lower frequency)
//Page Size (264 Bytes)
//15 don't care bits + 9 addrress
SPI_Write_Byte(0xFF); //8 can't care bits
SPI_Write_Byte((unsigned char)(BFA>>8)); //7 can't care bits
SPI_Write_Byte((unsigned char)BFA); //address
SPI_Write_Byte(0xFF); //1 can't care byte (lower frequency 不用这个字节)
for(i=0;i<rDataLen;i++) rData[i] = SPI_Read_Byte(0xFF);//读取数据
Disable_DFLASH();
}
/************************************************************
*把缓冲器(Buffer1或Buffer2)中的数据写到内存的页中(写整页)
*先擦除再写数据(硬件支持的带擦除写)
*BufferX :选择缓冲器(Buffer1或Buffer2)
*PA :内存中页的地址 0~2047
************************************************************/
void DF_Write_Buffer_to_Page(unsigned char BufferX,unsigned int PA)
{
DF_Check_Busy_State();
Enable_DFLASH();
if(BufferX == Buffer1) SPI_Write_Byte(Write_Buffer1_to_Page_whin_Erase);//0x83
else SPI_Write_Byte(Write_Buffer2_to_Page_whin_Erase);//0x86
//Page Size (264 Bytes)
//4 don't care bits + 11 address + 9 don't care bits
SPI_Write_Byte((unsigned char)(PA>>7));
SPI_Write_Byte((unsigned char)(PA<<1));
SPI_Write_Byte(0xFF); //8 don't care bits
Disable_DFLASH();
}
/************************************************************
*读取内存的页(整页)的数据到缓冲器(Buffer1或Buffer2)中
*BufferX :选择缓冲器(Buffer1或Buffer2)
*PA :内存中页的地址 0~2047
************************************************************/
void DF_Read_Buffer_from_Page(unsigned char BufferX,unsigned int PA)
{
DF_Check_Busy_State();
Enable_DFLASH();
if(BufferX == Buffer1) SPI_Write_Byte(Read_Page_to_Buffer1);//0x53
else SPI_Write_Byte(Read_Page_to_Buffer2);//0x55
//Page Size (264 Bytes)
//4 don't care bits + 11 address + 9 don't care bits
SPI_Write_Byte((unsigned char)(PA>>7));
SPI_Write_Byte((unsigned char)(PA<<1));
SPI_Write_Byte(0xFF); //8 don't care bits
Disable_DFLASH();
}
/************************************************************
*将数据写到内存中(自动先写到BUFFER1 OR BURRER2中再将数据写到内存中)
*BufferX :选择自动先写入的缓冲器(Buffer1或Buffer2)
*PA :内存中的页地址0~2047
*BA :从页中的这个地址开始写数据,会自动转到下一页(0~263)
*当写到最后一页的最后一个地址时,会自动转到第一页开始写
*wData :要写入的数据
*DataLen :要写入的数据长度
************************************************************/
void Main_Memory_Page_Program_Through_Buffer(unsigned char BufferX,
unsigned int PA,unsigned char BA,
unsigned char *wData,unsigned int DataLen)
{
unsigned char i;
DF_Check_Busy_State();
Enable_DFLASH();
if(BufferX == Buffer1) SPI_Write_Byte(Main_Memory_Page_Program_Through_Buffer1);//0x82
else SPI_Write_Byte(Main_Memory_Page_Program_Through_Buffer2);//0x85
//4 bits(don't care bits) + 11 bits(page address)+9(address in the page)
SPI_Write_Byte((unsigned char)(PA>>7));
SPI_Write_Byte((unsigned char)((PA<<1)|(BA>>8)));
SPI_Write_Byte((unsigned char)BA);
for(i=0;i<DataLen;i++) SPI_Write_Byte(wData[i]);
Disable_DFLASH();
}
/************************************************************
*从内存中读取数据到数组rData中(直接读取数据不经过BUFFER1 OR BURRER2)
*PA :内存中的页地址0~2047
*BA :从页中的这个地址开始读数据,会自动转到下一页(0~263)
*当读到最后一页的最后一个地址时,会自动转到第一页开始读取
*rData :存放读到的数据
*DataLen :要读取的数据长度
*与DF_Continuous_Array_Read一样的功能但与Buffer有关,但不改变Buffer中的数据
************************************************************/
void DF_Main_Memory_Page_Read(unsigned int PA,unsigned char BA,
unsigned char *rData,unsigned int DataLen)
{
unsigned char i;
DF_Check_Busy_State();
Enable_DFLASH();
SPI_Write_Byte(Main_Memory_Page_Read_Command);//0xD2
//4 bits(don't care bits) + 11 bits(page address)+9(address in the page)
SPI_Write_Byte((unsigned char)(PA>>7));
SPI_Write_Byte((unsigned char)((PA<<1)|(BA>>8)));
SPI_Write_Byte((unsigned char)BA);
//4 don’t care bytes
for(i=0;i<4;i++) SPI_Write_Byte(0xFF);
for(i=0;i<DataLen;i++) rData[i] = SPI_Read_Byte(0xFF);//读取数据
Disable_DFLASH();
}
/************************************************************
*从内存中读取数据到数组rData中(直接读取数据不经过BUFFER1 OR BURRER2)
*PA :内存中的页地址0~2047
*BA :从页中的这个地址开始读数据,会自动转到下一页(0~263)
*当读到最后一页的最后一个地址时,会自动转到第一页开始读取
*rData :存放读到的数据
*DataLen :要读取的数据长度
*与DF_Main_Memory_Page_Read一样的功能但与Buffer无关
************************************************************/
void DF_Continuous_Array_Read(unsigned int PA,unsigned char BA,
unsigned char *rData,unsigned int DataLen)
{
unsigned char i;
DF_Check_Busy_State();
Enable_DFLASH();
SPI_Write_Byte(Continuous_Array_Read_Command);//0xE8
//4 bits(don't care bits) + 11 bits(page address)+9(address in the page)
SPI_Write_Byte((unsigned char)(PA>>7));
SPI_Write_Byte((unsigned char)((PA<<1)|(BA>>8)));
SPI_Write_Byte((unsigned char)BA);
//4 don’t care bytes
for(i=0;i<4;i++) SPI_Write_Byte(0xFF);
for(i=0;i<DataLen;i++) rData[i] = SPI_Read_Byte(0xFF);//读取数据
Disable_DFLASH();
}
/************************************************************
*擦除FLASH全部内容
*not affect sectors that are protected or locked down
************************************************************/
void DF_Chip_Erase(void)
{
unsigned char Chip_Erase_Command[4]={0xC7,0x94,0x80,0x9A};//整片擦除操作码
unsigned char i;
DF_Check_Busy_State();
Enable_DFLASH();
for(i=0;i<4;i++)
{
SPI_Write_Byte(Chip_Erase_Command[i]);
}
Disable_DFLASH();
}
/************************************************************
*DataFlash初始化(其实是初始化驱动FLASH用到的SPI)
************************************************************/
void DataFlash_Init(void)
{
SPI_Init();
}
/************************************************************
*FLASH复位
************************************************************/
void DF_Reset(void)
{
SPI_PORT&=~(1<<RESET); //使能复位
DF_Delay(100);
SPI_PORT|=(1<<RESET); //禁止复位
DF_Delay(100);
}
/************************************************************
*Test DataFlash
************************************************************/
//Test_Flash_Buffer_to_Buffer
void Test_Flash_Buffer_to_Buffer(void)
{
unsigned char i;
unsigned char TestWriteBuffer[10]={1,2,3,4,5,6,7,8,9,10};
unsigned char TestReadBuffer[10] ={0,0,0,0,0,0,0,0,0,0};
//写数据到Buffer中
DF_Write_to_Buffer(Buffer1,0,TestWriteBuffer,10);
//DF_Delay(10);
//从Buffer中读取数据
DF_Read_from_Buffer(Buffer1,0,TestReadBuffer,10);
//DF_Delay(10);
for(i=0;i<10;i++)//把要写入的和读出的数据写入EEPROM用于比较
{
eeprom_write_byte((i+16*0),TestWriteBuffer[i]);
eeprom_write_byte((i+16*1),TestReadBuffer[i]);
}
}
//Test_Flash_Page_to_Page
void Test_Flash_Page_to_Page(void)
{
unsigned char i;
unsigned char TestWriteBuffer[10]={10,9,8,7,6,5,4,3,2,1};
unsigned char TestReadBuffer[10] ={0,0,0,0,0,0,0,0,0,0};
//将数据写到内存中(自动先写到BUFFER1 OR BURRER2中再将数据写到内存中)
Main_Memory_Page_Program_Through_Buffer(Buffer1,0,0,TestWriteBuffer,10);
//DF_Delay(10);
//从内存中读取数据到数组rData中(直接读取数据不经过BUFFER1 OR BURRER2)
DF_Main_Memory_Page_Read(0,0,TestReadBuffer,10);
//DF_Delay(10);
for(i=0;i<10;i++)//把要写入的和读出的数据写入EEPROM用于比较
{
eeprom_write_byte((i+16*2),TestWriteBuffer[i]);
eeprom_write_byte((i+16*3),TestReadBuffer[i]);
}
}
//Test_Flash_Buffer_Page_to_Page
void Test_Flash_Buffer_Page_to_Page(void)
{
unsigned char i;
unsigned char TestWriteBuffer[10]={1,2,3,4,5,6,7,8,9,10};
unsigned char TestReadBuffer[10] ={0,0,0,0,0,0,0,0,0,0};
//写数据到Buffer中
DF_Write_to_Buffer(Buffer1,0,TestWriteBuffer,10);
//DF_Delay(10);
//将Buffer中的数据写到DataFlash中
DF_Write_Buffer_to_Page(Buffer1,0);
//DF_Delay(10);
//读出DataFlash中的数据
//DF_Main_Memory_Page_Read(0,0,TestReadBuffer,10);
DF_Continuous_Array_Read(0,0,TestReadBuffer,10);
//DF_Delay(10);
for(i=0;i<10;i++)//把要写入的和读出的数据写入EEPROM用于比较
{
eeprom_write_byte((i+16*4),TestWriteBuffer[i]);
eeprom_write_byte((i+16*5),TestReadBuffer[i]);
}
}
//Test_Flash_Buffer_Page_to_Page_Buffer
void Test_Flash_Buffer_Page_to_Page_Buffer(void)
{
unsigned char i;
unsigned char TestWriteBuffer[10]={10,9,8,7,6,5,4,3,2,1};
unsigned char TestReadBuffer[10] ={0,0,0,0,0,0,0,0,0,0};
//写数据到Buffer中
DF_Write_to_Buffer(Buffer1,0,TestWriteBuffer,10);
//DF_Delay(10);
//将Buffer中的数据写到Page中
DF_Write_Buffer_to_Page(Buffer1,0);
//DF_Delay(10);
//从Page中读取数据到Buffer中
DF_Read_Buffer_from_Page(Buffer1,0);
//DF_Delay(10);
//从Buffer中读取数据
DF_Read_from_Buffer(Buffer1,0,TestReadBuffer,10);
//DF_Delay(10);
for(i=0;i<10;i++)//把要写入的和读出的数据写入EEPROM用于比较
{
eeprom_write_byte((i+16*6),TestWriteBuffer[i]);
eeprom_write_byte((i+16*7),TestReadBuffer[i]);
}
}
/************************************************************
*主函数
************************************************************/
void main(void)
{
unsigned int i;
unsigned char Temp_Sector_Lockdown_Register[8];
DF_Delay(1000);
DDRA =0XFF;
PORTA=0X01; //指示灯起始状态
//FLASH初始化(SPI初始化)
DataFlash_Init();
//wait for a moment
DF_Delay(100);
//Flash复位
DF_Reset();
//读取FLASH内部状态寄存器
//PORTA=DF_Read_status_Register();
//读取扇区加锁寄存器
//DF_Read_Sector_Lockdown_Register(Temp_Sector_Lockdown_Register);
//for(i=0;i<8;i++)
//{
// eeprom_write_byte(i,Temp_Sector_Lockdown_Register[i]);
//}
//取消所有扇区保护
//if(DF_Cancel_Sector_Protection()) PORTA=0X18;//OK
//测试FLASH产家ID 读到为0x1F才算正常
//if(Test_Manufacturer_ID()) PORTA=0x1F;
//使FLASH进入Deep_Power_Down
//DF_Deep_Power_Down();
//使FLASH退出Deep_Power_Down
//DF_Resume_from_Deep_Power_Down();
//擦除FLASH全部内容
//DF_Chip_Erase();
//测试FLASH读写
Test_Flash_Buffer_to_Buffer(); //ok
Test_Flash_Page_to_Page(); //ok
Test_Flash_Buffer_Page_to_Page(); //ok
Test_Flash_Buffer_Page_to_Page_Buffer(); //ok
PORTA=0X80; //程序执行完成状态
while(1)
{
asm("sei");
}
}⌨️ 快捷键说明
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