这几天在写一个有关数据保存的程序（芯片为AT45D642D），写了很久，但是调试总是不成功，希望哪位高手指点下，谢谢！
主要的程序如下：
#define AT45DB_BUFFER_1_WRITE 0x84 /* 写入第一缓冲区 */
#define AT45DB_BUFFER_2_WRITE 0x87 /* 写入第二缓冲区 */
#define AT45DB_BUFFER_1_WRITE_FLASH 0x82 /* 写入第一缓冲区 */
#define AT45DB_BUFFER_2_WRITE_FLASH 0x85 /* 写入第二缓冲区 */
#define AT45DB_MM_H_READ 0x0B /* 连续阵列读，高速模式*/
#define AT45DB_BUFFER_1_READ 0xD4 /* 读取第一缓冲区 */
#define AT45DB_BUFFER_2_READ 0xD6 /* 读取第二缓冲区 */
#define AT45DB_B1_TO_MM_PAGE_PROG_WITH_ERASE 0x83 /* 将第一缓冲区的数据写入主存储器（擦除模式）*/
#define AT45DB_B2_TO_MM_PAGE_PROG_WITH_ERASE 0x86 /* 将第二缓冲区的数据写入主存储器（擦除模式）*/
#define AT45DB_MM_PAGE_TO_B1_XFER 0x53 /* 将主存储器的指定页数据加载到第一缓冲区 */
#define AT45DB_MM_PAGE_TO_B2_XFER 0x55 /* 将主存储器的指定页数据加载到第二缓冲区 */
#define AT45DB_PAGE_ERASE 0x81 /* 页删除（每页512/528字节） */
#define AT45DB_SECTOR_ERASE 0x7C /* 扇区擦除（每扇区128K字节）*/
#define AT45DB_READ_STATE_REGISTER 0xD7 /* 读取状态寄存器 */
#define AT45DB_BLACK_ERASE 0x50 /* 块删除(每块4KByte)*/
#define AT45DB_MM_PAGE_READ 0xD2 /* 直接读主存储器的内存页*/
#define AT45DB_DATAFLASH_BUSY_BIT 0x80
#define FLASH_PAGE_COUNT 4096
#define FLASH_PAGE_SIZE 512
#define FLASH_SIZE_KBYTE 2112
#define SPI_Data_Flash_AT_SELECT() GPIO_ResetBits(GPIOC, GPIO_Pin_6) /* AT45db CS = L */
#define SPI_Data_Flash_AT_DESELECT() GPIO_SetBits(GPIOC, GPIO_Pin_6) /* AT45db CS = H */
unsigned char present_count1[12]={0x03,0x03,0x03,0x03,0x03,0x03,0x03,0x03,0x03,0x03,0x03,0x03};
unsigned char present_count2[12]={0x03,0x04,0x01,0x02,0x05,0x04,0x01,0x02,0x06,0x08,0x06,0x04};
//SPI SI(15) SPI SO(14) SPI SCK(13)
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_15|GPIO_Pin_14|GPIO_Pin_13;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_Init(GPIOB, &GPIO_InitStructure);
//SPI CS
GPIO_SetBits(GPIOC, GPIO_Pin_6);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; //通用推挽输出
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure); GPIO_SetBits(GPIOC,GPIO_Pin_6);
/****************************SPI配置***************************/
void SPI_Configuration(void)
{
SPI_InitTypeDef SPI_InitStructure;
SPI_Cmd(SPI2, DISABLE);
SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex; //设置SPI单向或者双向的数据模式:SPI设置为双线双向全双工
SPI_InitStructure.SPI_Mode = SPI_Mode_Master; //设置SPI工作模式:设置为主SPI
SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b; //设置SPI的数据大小:SPI发送接收8位帧结构
SPI_InitStructure.SPI_CPOL = SPI_CPOL_High; //选择了串行时钟的稳态:时钟 悬空低
SPI_InitStructure.SPI_CPHA = SPI_CPHA_2Edge; //数据捕获于第二个时钟沿
SPI_InitStructure.SPI_NSS = SPI_NSS_Soft; //NSS信号由硬件（NSS管脚）还是 软件（使用SSI位）管理:内部NSS信号有SSI位控制
SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_16; //定义波特 率预分频的值:波特率预分频值为256
SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB; //指定数据传输从MSB位还是LSB位开始:数据传输从MSB位开始
SPI_InitStructure.SPI_CRCPolynomial = 7; //CRC值计算的多项式
SPI_Init(SPI2, &SPI_InitStructure); //根据SPI_InitStruct中指定的参数初始化外设SPIx寄存器
SPI_Cmd(SPI2, ENABLE); //使能SPI外设
/***SPI_ReadWrite_Byte()****SPI发送或接收1字节***********************/
static u8 SPI_ReadWrite_Byte(u8 byte)
{
/*等待发送寄存器空*/
while((SPI2->SR & SPI_I2S_FLAG_TXE)==RESET);
/*发送一个字节*/
SPI2->DR = byte;
/* 等待接收寄存器有效*/
while((SPI2->SR & SPI_I2S_FLAG_RXNE)==RESET);
return(SPI2->DR);
}
/***Dataflash_read_status()*****读取状态寄存器**************************/
u8 Dataflash_read_status(void)
{
u8 data;
SPI_Data_Flash_AT_SELECT(); //片选Dataflash
SPI_ReadWrite_Byte(AT45DB_READ_STATE_REGISTER);
data = SPI_ReadWrite_Byte(0x00);
SPI_Data_Flash_AT_DESELECT();
return data;
}
/***SPI_Data_Flash_Busy_Detect()*******Data Flash 检测忙*******************/
u8 SPI_Data_Flash_Busy_Detect(void)
{
u16 i=0;
if((Dataflash_read_status() & AT45DB_DATAFLASH_BUSY_BIT) == 0)
{
for(i=0;i<0xff;i++);
if((Dataflash_read_status() & AT45DB_DATAFLASH_BUSY_BIT) == 0)
return 1; //忙返回1
else
return 0;
}
else
{
return 0; //空闲返回0
}
}
/***Dataflash_read_flash2buffer()****设定AT45DB在读取的时候，将数据送往内部的1号Buffer或者 2号***/
u8 Dataflash_read_flash2buffer(FLASH_BUFFER_NUM buffer_num, u16 page)
{
if(SPI_Data_Flash_Busy_Detect()==0) //==0 Data Flash空闲
{
SPI_Data_Flash_AT_SELECT(); //片选Dataflash if (buffer_num == FLASH_BUFFER1)
if (buffer_num == FLASH_BUFFER1)
{
SPI_ReadWrite_Byte(AT45DB_MM_PAGE_TO_B1_XFER);
// SPI_ReadWrite_Byte(AT45DB_BUFFER_1_READ);
}
else
{
SPI_ReadWrite_Byte(AT45DB_MM_PAGE_TO_B2_XFER); // 8-bit opcode
// SPI_ReadWrite_Byte(AT45DB_BUFFER_2_READ);
}
// SPI_ReadWrite_Byte(AT45DB_MM_H_READ);
// SPI_ReadWrite_Byte(ADR_P_1(page));
// SPI_ReadWrite_Byte(ADR_P_2(page));
SPI_ReadWrite_Byte(0x00); // 8 don't care bits
SPI_Data_Flash_AT_DESELECT();
return 1;
}
return 0;
}
/***DataFlashPageRead()*****读取AT45DB内部页数据***************/
void DataFlashPageRead(unsigned int page,unsigned char * pHeader)
{
// unsigned int i=0;
while(SPI_Data_Flash_Busy_Detect());
SPI_Data_Flash_AT_SELECT();
SPI_ReadWrite_Byte(AT45DB_MM_PAGE_READ);
SPI_ReadWrite_Byte((unsigned char)(page >> 6));
SPI_ReadWrite_Byte((unsigned char)(page << 2));
SPI_ReadWrite_Byte(0x00);
// SPI_Data_Flash_AT_DESELECT();
/* while(SPI_Data_Flash_Busy_Detect());
SPI_Data_Flash_AT_SELECT();
SPI_ReadWrite_Byte(AT45DB_BUFFER_1_READ);
SPI_ReadWrite_Byte(0x00);
SPI_ReadWrite_Byte(0x00);
SPI_ReadWrite_Byte(0x00);
SPI_ReadWrite_Byte(0x00); */
for (i=0; i<512; i++)
{
*pHeader++ = SPI_ReadWrite_Byte(0x00);
}
SPI_Data_Flash_AT_DESELECT();
}
/***FlashPageWrite()******将数据写入AT45DB161内部页存储空间***/
void FlashPageWrite(u16 page,u8 *Data) //写一整页，页范围0-4095
{
u16 i;
while(SPI_Data_Flash_Busy_Detect());
SPI_Data_Flash_AT_SELECT(); //片选Dataflash if (buffer_num == FLASH_BUFFER1)
SPI_ReadWrite_Byte(AT45DB_BUFFER_1_WRITE);
while(SPI_Data_Flash_Busy_Detect());
if ( page < 8192)
{
SPI_Data_Flash_AT_SELECT(); //片选Dataflash if (buffer_num == FLASH_BUFFER1)
SPI_ReadWrite_Byte(AT45DB_B2_TO_MM_PAGE_PROG_WITH_ERASE);
SPI_ReadWrite_Byte((u8)(page>>6));
SPI_ReadWrite_Byte((u8)(page<<2));
SPI_ReadWrite_Byte(0x00);
while(SPI_Data_Flash_Busy_Detect());
SPI_Data_Flash_AT_DESELECT();
}
/* SPI_ReadWrite_Byte(ADR_B_1(address));
SPI_ReadWrite_Byte(ADR_B_2(address)); */
// SPI_ReadWrite_Byte(0x00);
// SPI_ReadWrite_Byte(0x00);
for (i = 0;i <512; i++)
{
if(i<12)
SPI_ReadWrite_Byte(Data)+0x30;
else SPI_ReadWrite_Byte(0x00);
}
SPI_Data_Flash_AT_DESELECT();
}
/***Dataflash_read_buffer()*****连续读AT45DB161内部缓冲区1或者缓冲区2的数据***/
u8 Dataflash_read_buffer(u8* data, u16 address, u16 size, FLASH_BUFFER_NUM buffer_num)
{
u16 i;
if(SPI_Data_Flash_Busy_Detect()==0) //==0 Data Flash空闲
{
SPI_Data_Flash_AT_SELECT(); //片选Dataflash if (buffer_num == FLASH_BUFFER1)
if (buffer_num == FLASH_BUFFER1)
{
SPI_ReadWrite_Byte(AT45DB_BUFFER_1_READ);
}
else
{
SPI_ReadWrite_Byte(AT45DB_BUFFER_2_READ);
}
SPI_ReadWrite_Byte(0x00);
SPI_ReadWrite_Byte(0x00|(address>>8));
SPI_ReadWrite_Byte(address);
SPI_ReadWrite_Byte(0x00); // 8 don't care
for (i=0; i<size; i++)
data = SPI_ReadWrite_Byte(0x00);
SPI_Data_Flash_AT_DESELECT();
return 1;
}
else //总线忙
{
return 0;
}
}
/***Dataflash_write2flash()*****连续写数据到SPI Flash内部**************/
u8 Dataflash_write2flash(unsigned char* data, unsigned int page, unsigned int address, unsigned int size, FLASH_BUFFER_NUM buffer_num)
{
u16 i;
if(SPI_Data_Flash_Busy_Detect()==0) //==0 Data Flash空闲
{
SPI_Data_Flash_AT_SELECT(); //片选Dataflash
if(buffer_num == FLASH_BUFFER1)
SPI_ReadWrite_Byte(AT45DB_BUFFER_1_WRITE_FLASH );
else
SPI_ReadWrite_Byte(AT45DB_BUFFER_2_WRITE_FLASH);
SPI_ReadWrite_Byte(page>>5);
SPI_ReadWrite_Byte((page<<3)|(address>>8));
SPI_ReadWrite_Byte(address);
// SPI_ReadWrite_Byte(0x00);
for (i=0; i<size; i++)
SPI_ReadWrite_Byte(data);
SPI_Data_Flash_AT_DESELECT();
return 1;
}
return 0;
}
/***AT45DB_ReadBytes()*****从某一页的某个位置开始读取一定长度的数据，放入数据缓冲区***/
void AT45DB_ReadBytes(unsigned int page,unsigned int byte,unsigned int len,unsigned char *pbuf)
{
unsigned int i;
while(SPI_Data_Flash_Busy_Detect()==1); //==0 Data Flash空闲
SPI_Data_Flash_AT_SELECT(); //片选Dataflash
SPI_ReadWrite_Byte(0x0b);
SPI_ReadWrite_Byte((unsigned char)(page>>5));
SPI_ReadWrite_Byte((unsigned char)((page<<3)|(byte>>8)));
SPI_ReadWrite_Byte((unsigned char) (byte));
SPI_ReadWrite_Byte(0x00);
for(i=0;i<len;i++) pbuf=SPI_ReadWrite_Byte(0x00);
SPI_Data_Flash_AT_DESELECT();
}
/***Dataflash_erase_page()*****删除对应的页 每页对应512Byte*******/
void Dataflash_erase_page(u16 page)
{
while(SPI_Data_Flash_Busy_Detect());
SPI_Data_Flash_AT_SELECT(); //片选Dataflash
SPI_ReadWrite_Byte(AT45DB_PAGE_ERASE);
SPI_ReadWrite_Byte(page>>7);
SPI_ReadWrite_Byte(page<<1);
SPI_ReadWrite_Byte(0x00); // 8 don't care bits
SPI_Data_Flash_AT_DESELECT();
}
/***Dataflash_erase_block()*******DataFlash AT45DB642D 块删除,每一块对应4KByte***/
void Dataflash_erase_block(u16 block)
{
while(SPI_Data_Flash_Busy_Detect());
SPI_Data_Flash_AT_SELECT(); //片选Dataflash
SPI_ReadWrite_Byte(AT45DB_BLACK_ERASE);
SPI_ReadWrite_Byte(block>>3);
SPI_ReadWrite_Byte(block<<8);
SPI_ReadWrite_Byte(0x00); // 8 don't care bits
SPI_Data_Flash_AT_DESELECT();
}
int main(void)
{
delay_ms(100);
RCC_Configuration();
GPIO_Configuration();
NVIC_Configuration();
USART_Configuration();
SPI_Configuration();
TIM3_Configuration();
Dataflash_erase_page(1); //擦除页
Dataflash_write2flash(present_count1,1,1,12,FLASH_BUFFER1);
while(1)
{
AT45DB_ReadBytes(1,1,12,present_count2);
SendData(present_count2,12);
SendData(start,15);
delay_ms(1000);
}}
如果保存数据成功的话，显示器上present_count2中的内容应和present_count1中的一样，可是现在显示屏显示的是12个BC，不知道为什么，求帮助。。
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