FLASH烧录字库

2024-01-10 10:47:34


一、如何烧录字库

将合并的字库烧录到外部spi flash,这里使用串口烧录,通过串口上位机发送bin文件,stm32串口接收到字符后写入spi flash里。

二、硬件连接

使用USB转TTL模块连接板子串口1,更新字库过程比较慢12M的字库文件串口烧录大约10分钟左右。
TTL模块TXD – 板子RXD
TTL模块RXD – 板子TXD
TTL模块GND – 板子GND
在这里插入图片描述

请添加图片描述

三、软件实现

1.主函数

#include "sysconfig.h"
#include "w25qxx.h"
#include "printer.h"

//#define ERASE_FLASH     1
#define UART_WRITE_FLASH	1 


int main(void)
{
	Rcc_init();
	SysTickConfig();
	Uart1_Config();
	Printer_Init();
	Led_Init();

#ifdef ERASE_FLASH
//	for(i=0; i<200; i++)
//	{
//		W25QXX_Erase_Sector(addr);
//		addr+=0x1000;
//	}
    W25QXX_Erase_Chip();
	printf("erase chip\r\n");
	while(1)
	{
	}
#endif

	while(1)
	{
		
	}
}

#if UART_WRITE_FLASH
u32 zk_addr = 0;

void USART1_IRQHandler(void)
{
	u8 ch;

	if(USART_GetITStatus(USART1,USART_IT_RXNE) != RESET)
	{
		ch = USART_ReceiveData(USART1);
//		printf(" %02x ", ch);
		W25QXX_Write_Page(&ch,zk_addr++,1);
		
		USART_ClearITPendingBit(USART1,USART_IT_RXNE);
	}
}

#endif


2.uart配置

void Uart1_Config(void)
{
	GPIO_InitTypeDef GPIO_InitStruct;
	USART_InitTypeDef USART_InitStruct;
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_USART1,ENABLE);
	
	GPIO_InitStruct.GPIO_Pin =GPIO_Pin_9;  //TXD --PA9
	GPIO_InitStruct.GPIO_Mode =GPIO_Mode_AF_PP;
	GPIO_InitStruct.GPIO_Speed =GPIO_Speed_10MHz;
	GPIO_Init(GPIOA,&GPIO_InitStruct);
	
	GPIO_InitStruct.GPIO_Pin =GPIO_Pin_10;		//RXD --PA10
	GPIO_InitStruct.GPIO_Mode =GPIO_Mode_IN_FLOATING;
	GPIO_Init(GPIOA,&GPIO_InitStruct);
	
	//配置串口,初始化串口1
	USART_InitStruct.USART_BaudRate = UART_BAUD_RATE;
	USART_InitStruct.USART_Mode = USART_Mode_Rx|USART_Mode_Tx;
	USART_InitStruct.USART_Parity =USART_Parity_No;
	USART_InitStruct.USART_StopBits = USART_StopBits_1;
	USART_InitStruct.USART_WordLength = USART_WordLength_8b;
	USART_InitStruct.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
	
	USART_Init(USART1,&USART_InitStruct);
	
	//初始化串口接收中断
//	USART_ITConfig(USART1,USART_IT_RXNE,ENABLE);
	//使能串口1
	USART_Cmd(USART1,ENABLE);

	Uart1_ITConfig();
	
}

void Uart1_ITConfig(void)
{
	NVIC_InitTypeDef NVIC_InitStructure;
	
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO,ENABLE);//AFIO时钟打开
	
	NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;//选择中断通道
	NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;//设置中断抢占优先级
	NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;//s设置中断响应优先级
	NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;//中断使能
	NVIC_Init(&NVIC_InitStructure);//串口中断初始化寄存器
	
	USART_ITConfig(USART1,USART_IT_RXNE,ENABLE);//设置串口中断模式为接收中断
}

u32 zk_addr = 0;
//串口中断服务函数
void USART1_IRQHandler(void)
{
	u8 ch;

	if(USART_GetITStatus(USART1,USART_IT_RXNE) != RESET) //判断串口1发生的中断是否为接收中断
	{
		ch = USART_ReceiveData(USART1);                  //接收数据
//		printf(" %02x ", ch);
		W25QXX_Write_Page(&ch,zk_addr++,1);//发送1字节给SPIFLASH
		
		USART_ClearITPendingBit(USART1,USART_IT_RXNE);  //清中断标志位
	}
}

3.spi和w25qxx驱动文件

spi.c实现

#define SPI1_GPIO           RCC_APB2Periph_GPIOA
#define SPI1_NSS_PORT       GPIOA
#define SPI1_NSS_PIN        GPIO_Pin_4
#define SPI1_SCK_PORT       GPIOA
#define SPI1_SCK_PIN        GPIO_Pin_5
#define SPI1_MISO_PORT      GPIOA
#define SPI1_MISO_PIN       GPIO_Pin_6
#define SPI1_MOSI_PORT      GPIOA
#define SPI1_MOSI_PIN       GPIO_Pin_7
#include "sysconfig.h"
//#include "spi.h"

void SPI1_Gpio_Init(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;

    RCC_APB2PeriphClockCmd(	RCC_APB2Periph_GPIOA, ENABLE);
    
    GPIO_InitStructure.GPIO_Pin   = SPI1_NSS_PIN;
    GPIO_InitStructure.GPIO_Mode  = GPIO_Mode_Out_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(SPI1_NSS_PORT, &GPIO_InitStructure);
    GPIO_SetBits(SPI1_NSS_PORT, SPI1_NSS_PIN);
    
    GPIO_InitStructure.GPIO_Pin   = SPI1_SCK_PIN;
    GPIO_InitStructure.GPIO_Mode  = GPIO_Mode_AF_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(SPI1_SCK_PORT, &GPIO_InitStructure);
    GPIO_SetBits(SPI1_SCK_PORT, SPI1_SCK_PIN);
#ifdef MCU_GD32
    GPIO_InitStructure.GPIO_Pin   = SPI1_MISO_PIN;
    GPIO_InitStructure.GPIO_Mode  = GPIO_Mode_IN_FLOATING;
//    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(SPI1_MISO_PORT, &GPIO_InitStructure);
#else
    GPIO_InitStructure.GPIO_Pin   = SPI1_MISO_PIN;
    GPIO_InitStructure.GPIO_Mode  = GPIO_Mode_AF_PP;//GPIO_Mode_IPU;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(SPI1_MISO_PORT, &GPIO_InitStructure);
#endif
    
    GPIO_InitStructure.GPIO_Pin   = SPI1_MOSI_PIN;
    GPIO_InitStructure.GPIO_Mode  = GPIO_Mode_AF_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(SPI1_MOSI_PORT, &GPIO_InitStructure);
    GPIO_SetBits(SPI1_MOSI_PORT, SPI1_MOSI_PIN);
}

void SPI1_Init(void)
{
    SPI_InitTypeDef  SPI_InitStructure;
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_SPI1, ENABLE);
    
    SPI_InitStructure.SPI_Direction         = SPI_Direction_2Lines_FullDuplex;  //设置为双线全双工模式
    SPI_InitStructure.SPI_Mode              = SPI_Mode_Master;		            //设置为主机模式
    SPI_InitStructure.SPI_DataSize          = SPI_DataSize_8b;		            //设置为8位数据长度
    SPI_InitStructure.SPI_CPOL              = SPI_CPOL_Low;		                //设置时钟线空闲状态为高电平
    SPI_InitStructure.SPI_CPHA              = SPI_CPHA_1Edge;	                //设置时钟线的第二个跳变沿(上升或下降)数据被采样
    SPI_InitStructure.SPI_NSS               = SPI_NSS_Soft;		                //设置NSS信号由软件(使用SSI位)管理
    SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_64;		    //设置波特率预分频值为64分频
    SPI_InitStructure.SPI_FirstBit          = SPI_FirstBit_MSB;	                //设置数据传输从MSB位开始
    SPI_InitStructure.SPI_CRCPolynomial     = 7;	                            //设置CRC计算的多项式
    SPI_Init(SPI1, &SPI_InitStructure);
    
    SPI_Cmd(SPI1, ENABLE);                                                      //使能SPI
}

void SPI2_Init(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;
    SPI_InitTypeDef  SPI_InitStructure;

    RCC_APB2PeriphClockCmd(	RCC_APB2Periph_GPIOB, ENABLE );//PORTB时钟使能 
    RCC_APB1PeriphClockCmd(	RCC_APB1Periph_SPI2,  ENABLE );//SPI2时钟使能 	

    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;  // PB12 推挽 
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;  //推挽输出
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOB, &GPIO_InitStructure);
    GPIO_SetBits(GPIOB,GPIO_Pin_12);

    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13 | GPIO_Pin_14 | GPIO_Pin_15;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;  //PB13/14/15复用推挽输出 
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOB, &GPIO_InitStructure);//初始化GPIOB

    GPIO_SetBits(GPIOB,GPIO_Pin_13|GPIO_Pin_14|GPIO_Pin_15);  //PB13/14/15上拉

    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_Low;		//串行同步时钟的空闲状态为高电平
    SPI_InitStructure.SPI_CPHA 			= SPI_CPHA_1Edge;	//串行同步时钟的第二个跳变沿(上升或下降)数据被采样
    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

//    SPI2_ReadWriteByte(0xff);//启动传输		 
 
} 

/******************************************************************************
 * FunctionName : SPI1_SetSpeed
 * Description  : SPI1设置速度
 * Parameters   : none
 * Returns      : none
*******************************************************************************/
void SPI1_SetSpeed(uint16_t SPI_BaudRatePrescaler)
{
    assert_param(IS_SPI_BAUDRATE_PRESCALER(SPI_BaudRatePrescaler));
    
    SPI_Cmd(SPI1, DISABLE);
    SPI1->CR1 &= 0xFFC7;
    SPI1->CR1 |= SPI_BaudRatePrescaler;
    SPI_Cmd(SPI1, ENABLE);
}

//SPI 速度设置函数
//SpeedSet:
//SPI_BaudRatePrescaler_2   2分频   
//SPI_BaudRatePrescaler_8   8分频   
//SPI_BaudRatePrescaler_16  16分频  
//SPI_BaudRatePrescaler_256 256分频 
  
void SPI2_SetSpeed(u8 SPI_BaudRatePrescaler)
{
  assert_param(IS_SPI_BAUDRATE_PRESCALER(SPI_BaudRatePrescaler));
	SPI2->CR1&=0XFFC7;
	SPI2->CR1|=SPI_BaudRatePrescaler;	//设置SPI2速度 
	SPI_Cmd(SPI2,ENABLE); 

}


/******************************************************************************
 * FunctionName : SPI1_ReadWriteByte
 * Description  : SPI1读写一个字节
 * Parameters   : none
 * Returns      : none
*******************************************************************************/
uint8_t SPI1_ReadWriteByte(uint8_t txdata)
{		
    uint8_t retry;
    
    retry = 0;
    while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_TXE) == RESET)  //检查发送缓存是否空闲
    {
        retry++;
        if (retry > 200)
            return 0;
    }
    SPI_I2S_SendData(SPI1, txdata);                                 //发送一个数据
    
    retry = 0;
    while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_RXNE) == RESET) //检查接收缓存是否非空
    {
        retry++;
        if (retry > 200)
            return 0;
    }
    return SPI_I2S_ReceiveData(SPI1);                               //返回接收到的一个数据
}

//SPIx 读写一个字节
//TxData:要写入的字节
//返回值:读取到的字节
u8 SPI2_ReadWriteByte(u8 TxData)
{		
	u8 retry=0;				 	
	while (SPI_I2S_GetFlagStatus(SPI2, SPI_I2S_FLAG_TXE) == RESET) //检查指定的SPI标志位设置与否:发送缓存空标志位
	{
	retry++;
	if(retry>200)return 0;
	}			  
	SPI_I2S_SendData(SPI2, TxData); //通过外设SPIx发送一个数据
	retry=0;

	while (SPI_I2S_GetFlagStatus(SPI2, SPI_I2S_FLAG_RXNE) == RESET) //检查指定的SPI标志位设置与否:接受缓存非空标志位
    {
    retry++;
    if(retry>200)return 0;
    }	  						    
	return SPI_I2S_ReceiveData(SPI2); //返回通过SPIx最近接收的数据					    
}

w25qxx.c和w25xqq.h文件

#include "w25qxx.h"


u16 W25QXX_TYPE = W25Q128;	//默认是W25Q128

//4Kbytes为一个Sector
//16个扇区为1个Block
//W25Q256
//容量丿32M字节,共朿512个Block_8192个Sector 
													 
//初始化SPI FLASH的IO叿
void W25QXX_Init(void)
{
    u8 temp;

    W25QXX_CS(1);				//SPI FLASH不?中
    SPI1_Init();		   	//初始化SPI
    SPI1_SetSpeed(SPI_BaudRatePrescaler_2);//设置丿18M时钟,高?模弿
    W25QXX_TYPE = W25QXX_ReadID();//读取FLASH ID. 
	printf("W25QXX type =%02x \r\n", W25QXX_TYPE);	
    if(W25QXX_TYPE == W25Q256)
    {
        temp = W25QXX_ReadSR(3);              //读取状濁寄存器3,判断地坿模式
        if((temp & 0X01) == 0)                  //如果不是4字节地址模式,则进兿4字节地址模式
        {
            W25QXX_CS(0);                    //选中
            SPI1_ReadWriteByte(W25X_Enable4ByteAddr);//发?进兿4字节地址模式指令   
            W25QXX_CS(1);                    //取消片?   
        }
	}

}  

//读取W25QXX的状态寄存器
//BIT7  6   5   4   3   2   1   0
//SPR   RV  TB BP2 BP1 BP0 WEL BUSY
//SPR:默认0,状濁寄存器保护使,配合WP使用
//TB,BP2,BP1,BP0:FLASH区域写保护设罿
//WEL:写使能锁宿
//BUSY:忙标记位(1,忿;0,空闲)
//默认:0x00
//状濁寄存器2_
//BIT7  6   5   4   3   2   1   0
//SUS   CMP LB3 LB2 LB1 (R) QE  SRP1
//状濁寄存器3_
//BIT7      6    5    4   3   2   1   0
//HOLD/RST  DRV1 DRV0 (R) (R) WPS ADP ADS
//regno:状濁寄存器号,茿:1~3
//返回倿:状濁寄存器倿
u8 W25QXX_ReadSR(u8 regno)   
{  
    u8 byte=0,command=0;
    
    switch(regno)
    {
        case 1:
            command = W25X_ReadStatusReg1;    //读状态寄存器1指令
            break;
        case 2:
            command = W25X_ReadStatusReg2;    //读状态寄存器2指令
            break;
        case 3:
            command = W25X_ReadStatusReg3;    //读状态寄存器3指令
            break;
        default:
            command = W25X_ReadStatusReg1;    
            break;
    }
		
    W25QXX_CS(0);                            //使能器件   
    SPI1_ReadWriteByte(command);            //发?读取状态寄存器命令    
    byte = SPI1_ReadWriteByte(0Xff);          //读取丿个字芿  
    W25QXX_CS(1);                            //取消片?     
    return byte;   
} 

//写W25QXX状濁寄存器
void W25QXX_Write_SR(u8 regno,u8 sr)   
{   
    u8 command = 0;
    switch(regno)
    {
        case 1:
            command = W25X_WriteStatusReg1;    //写状态寄存器1指令
            break;
        case 2:
            command = W25X_WriteStatusReg2;    //写状态寄存器2指令
            break;
        case 3:
            command = W25X_WriteStatusReg3;    //写状态寄存器3指令
            break;
        default:
            command = W25X_WriteStatusReg1;    
            break;
    }
    
    W25QXX_CS(0);                            //使能器件   
    SPI1_ReadWriteByte(command);            //发?写取状态寄存器命令    
    SPI1_ReadWriteByte(sr);                 //写入丿个字芿  
    W25QXX_CS(1);                            //取消片?     	      

}   
//W25QXX写使胿	
//将WEL置位   
void W25QXX_Write_Enable(void)   
{
	W25QXX_CS(0);                          	//使能器件   
    SPI1_ReadWriteByte(W25X_WriteEnable); 	//发?写使能  
	W25QXX_CS(1);                           	//取消片?     	      
} 
//W25QXX写禁歿	
//将WEL清零  
void W25QXX_Write_Disable(void)   
{  
	W25QXX_CS(0);                            //使能器件   
    SPI1_ReadWriteByte(W25X_WriteDisable);  //发?写禁止指令    
	W25QXX_CS(1);                            //取消片?     	      
} 		
//读取芯片ID
//返回值如丿:				   
//0XEF13,表示芯片型号为W25Q80  
//0XEF14,表示芯片型号为W25Q16    
//0XEF15,表示芯片型号为W25Q32  
//0XEF16,表示芯片型号为W25Q64 
//0XEF17,表示芯片型号为W25Q128 	  
u16 W25QXX_ReadID(void)
{
    u16 Temp = 0;
    W25QXX_CS(0);    
    SPI1_ReadWriteByte(0x90);//发?读取ID命令	    
    SPI1_ReadWriteByte(0x00);    
    SPI1_ReadWriteByte(0x00);    
    SPI1_ReadWriteByte(0x00);   
    Temp|=SPI1_ReadWriteByte(0xFF)<<8;  
    Temp|=SPI1_ReadWriteByte(0xFF);
    W25QXX_CS(1);    
    return Temp;
}   		    
//读取SPI FLASH  
//在指定地坿弿始读取指定长度的数据
//pBuffer:数据存储匿
//ReadAddr:弿始读取的地址(24bit)
//NumByteToReW25QXX_Readad:要读取的字节敿(朿夿65535)
void W25QXX_Read(u8* pBuffer,u32 ReadAddr,u16 NumByteToRead)   
{ 
 	u16 i;    
	W25QXX_CS(0);                            	//使能器件   
    SPI1_ReadWriteByte(W25X_ReadData);         	//发?读取命仿   
    if(W25QXX_TYPE == W25Q256)                //如果是W25Q256的话地址丿4字节的,要发送最髿8使
    {
        SPI1_ReadWriteByte((u8)((ReadAddr)>>24));    
    }
    SPI1_ReadWriteByte((u8)((ReadAddr)>>16));  	//发?24bit地址    
    SPI1_ReadWriteByte((u8)((ReadAddr)>>8));   
    SPI1_ReadWriteByte((u8)ReadAddr);   
    for(i=0;i<NumByteToRead;i++)
	{ 
        pBuffer[i]=SPI1_ReadWriteByte(0XFF);   	//循环读数  
    }
	W25QXX_CS(1);      
}  
//SPI在一顿(0~65535)内写入少亿256个字节的数据
//在指定地坿弿始写入最夿256字节的数捿
//pBuffer:数据存储匿
//WriteAddr:弿始写入的地址(24bit)
//NumByteToWrite:要写入的字节敿(朿夿256),该数不应该超过该页的剩余字节敿!!!	 
void W25QXX_Write_Page(u8* pBuffer,u32 WriteAddr,u16 NumByteToWrite)
{
 	u16 i;  
    W25QXX_Write_Enable();                  	//SET WEL 
	W25QXX_CS(0);                            	//使能器件   
    SPI1_ReadWriteByte(W25X_PageProgram);      	//发?写页命仿   
    if(W25QXX_TYPE == W25Q256)                //如果是W25Q256的话地址丿4字节的,要发送最髿8使
    {
        SPI1_ReadWriteByte((u8)((WriteAddr)>>24)); 
    }
    SPI1_ReadWriteByte((u8)((WriteAddr)>>16)); 	//发?24bit地址    
    SPI1_ReadWriteByte((u8)((WriteAddr)>>8));   
    SPI1_ReadWriteByte((u8)WriteAddr);   
    for(i=0;i<NumByteToWrite;i++)SPI1_ReadWriteByte(pBuffer[i]);//循环写数  
	W25QXX_CS(1);                            	//取消片? 
	W25QXX_Wait_Busy();					   		//等待写入结束
} 
//无检验写SPI FLASH 
//必须确保承写的地址范围内的数据全部丿0XFF,否则在非0XFF处写入的数据将失贿!
//具有自动换页功能 
//在指定地坿弿始写入指定长度的数据,但是要确保地坿不越畿!
//pBuffer:数据存储匿
//WriteAddr:弿始写入的地址(24bit)
//NumByteToWrite:要写入的字节敿(朿夿65535)
//CHECK OK
void W25QXX_Write_NoCheck(u8* pBuffer,u32 WriteAddr,u16 NumByteToWrite)   
{ 			 		 
	u16 pageremain;	   
	pageremain=256-WriteAddr%256; //单页剩余的字节数		 	    
	if(NumByteToWrite<=pageremain)pageremain=NumByteToWrite;//不大亿256个字芿
	while(1)
	{	   
		W25QXX_Write_Page(pBuffer,WriteAddr,pageremain);
		if(NumByteToWrite==pageremain)break;//写入结束亿
	 	else //NumByteToWrite>pageremain
		{
			pBuffer+=pageremain;
			WriteAddr+=pageremain;	

			NumByteToWrite-=pageremain;			  //减去已经写入了的字节敿
			if(NumByteToWrite>256)pageremain=256; //丿次可以写兿256个字芿
			else pageremain=NumByteToWrite; 	  //不够256个字节了
		}
	};	    
} 
//写SPI FLASH  
//在指定地坿弿始写入指定长度的数据
//该函数带擦除操作!
//pBuffer:数据存储匿
//WriteAddr:弿始写入的地址(24bit)						
//NumByteToWrite:要写入的字节敿(朿夿65535)   
u8 W25QXX_BUFFER[4096];		 
void W25QXX_Write(u8* pBuffer,u32 WriteAddr,u16 NumByteToWrite)   
{ 
	u32 secpos;
	u16 secoff;
	u16 secremain;	   
 	u16 i;    
	u8 * W25QXX_BUF;	  
   	W25QXX_BUF=W25QXX_BUFFER;	     
 	secpos=WriteAddr/4096;//扇区地址  
	secoff=WriteAddr%4096;//在扇区内的偏秿
	secremain=4096-secoff;//扇区剩余空间大小   
 	//printf("ad:%X,nb:%X\r\n",WriteAddr,NumByteToWrite);//测试甿
 	if(NumByteToWrite<=secremain)secremain=NumByteToWrite;//不大亿4096个字芿
	while(1) 
	{	
		W25QXX_Read(W25QXX_BUF,secpos*4096,4096);//读出整个扇区的内宿
		for(i=0;i<secremain;i++)//校验数据
		{
			if(W25QXX_BUF[secoff+i]!=0XFF)break;//霿要擦陿  	  
		}
		if(i<secremain)//霿要擦陿
		{
			W25QXX_Erase_Sector(secpos);		//擦除这个扇区
			for(i=0;i<secremain;i++)	   		//复制
			{
				W25QXX_BUF[i+secoff]=pBuffer[i];	  
			}
			W25QXX_Write_NoCheck(W25QXX_BUF,secpos*4096,4096);//写入整个扇区  

		}else W25QXX_Write_NoCheck(pBuffer,WriteAddr,secremain);//写已经擦除了皿,直接写入扇区剩余区间. 				   
		if(NumByteToWrite==secremain)break;//写入结束亿
		else//写入未结板
		{
			secpos++;//扇区地址墿1
			secoff=0;//偏移位置丿0 	 

		   	pBuffer+=secremain;  				//指针偏移
			WriteAddr+=secremain;				//写地坿偏移	   
		   	NumByteToWrite-=secremain;			//字节数?减
			if(NumByteToWrite>4096)secremain=4096;//下一个扇区还是写不完
			else secremain=NumByteToWrite;		//下一个扇区可以写完了
		}	 
	};	 
}
//擦除整个芯片		  
//等待时间超长...
void W25QXX_Erase_Chip(void)   
{                                   
    W25QXX_Write_Enable();                 	 	//SET WEL 
    W25QXX_Wait_Busy();   
  	W25QXX_CS(0);                            	//使能器件   
    SPI1_ReadWriteByte(W25X_ChipErase);        	//发?片擦除命令  
	W25QXX_CS(1);                            	//取消片?     	      
	W25QXX_Wait_Busy();   				   		//等待芯片擦除结束
}   
//擦除丿个扇匿
//Dst_Addr:扇区地址 根据实际容量设置
//擦除丿个山区的朿少时闿:150ms
void W25QXX_Erase_Sector(u32 Dst_Addr)   
{  
    //监视falsh擦除情况,测试甿   
    //printf("fe:%x\r\n",Dst_Addr);	  
    Dst_Addr*=4096;
    W25QXX_Write_Enable();                  	//SET WEL 	 
    W25QXX_Wait_Busy();   
    W25QXX_CS(0);                            	//使能器件   
    SPI1_ReadWriteByte(W25X_SectorErase);      	//发?扇区擦除指仿 
    if(W25QXX_TYPE == W25Q256)                //如果是W25Q256的话地址丿4字节的,要发送最髿8使
    {
        SPI1_ReadWriteByte((u8)((Dst_Addr)>>24)); 
    }
    SPI1_ReadWriteByte((u8)((Dst_Addr)>>16));  	//发?24bit地址    
    SPI1_ReadWriteByte((u8)((Dst_Addr)>>8));   
    SPI1_ReadWriteByte((u8)Dst_Addr);  
    W25QXX_CS(1);                            	//取消片?     	      
    W25QXX_Wait_Busy();   				   		//等待擦除完成
}  

//等待空闲
void W25QXX_Wait_Busy(void)   
{   
	while((W25QXX_ReadSR(1)&0x01)==0x01);  		// 等待BUSY位清穿
}  

//进入掉电模式
void W25QXX_PowerDown(void)   
{ 
    W25QXX_CS(0);                           	 	//使能器件   
    SPI1_ReadWriteByte(W25X_PowerDown);        //发?掉电命仿  
    W25QXX_CS(1);                            	//取消片?     	      
    //delay_us(3);                               //等待TPD  
}   
//唤醒
void W25QXX_WAKEUP(void)   
{  
    W25QXX_CS(0);                            	//使能器件   
    SPI1_ReadWriteByte(W25X_ReleasePowerDown);	//  send W25X_PowerDown command 0xAB    
    W25QXX_CS(1);                            	//取消片?     	      
    //delay_us(3);                            	//等待TRES1
}   




#ifndef __FLASH_H
#define __FLASH_H    
#include "sysconfig.h"   

#define W25Q80  0XEF13
#define W25Q16  0XEF14
#define W25Q32  0XEF15
#define W25Q64  0XEF16
#define W25Q128 0XEF17
#define W25Q256 0XC218


extern u16 W25QXX_TYPE;

#define W25QXX_CS(x) x? GPIO_SetBits(GPIOA, GPIO_Pin_4):GPIO_ResetBits(GPIOA, GPIO_Pin_4)
 

 
//指令表
#define W25X_WriteEnable		0x06 
#define W25X_WriteDisable		0x04 
#define W25X_ReadStatusReg1     0x05 
#define W25X_ReadStatusReg2     0x35 
#define W25X_ReadStatusReg3     0x15 
#define W25X_WriteStatusReg1    0x01 
#define W25X_WriteStatusReg2    0x31 
#define W25X_WriteStatusReg3    0x11 
#define W25X_ReadData			0x03 
#define W25X_FastReadData		0x0B 
#define W25X_FastReadDual		0x3B 
#define W25X_PageProgram		0x02 
#define W25X_BlockErase			0xD8 
#define W25X_SectorErase		0x20 
#define W25X_ChipErase			0xC7 
#define W25X_PowerDown			0xB9 
#define W25X_ReleasePowerDown	0xAB 
#define W25X_DeviceID			0xAB 
#define W25X_ManufactDeviceID	0x90 
#define W25X_JedecDeviceID		0x9F 
#define W25X_Enable4ByteAddr    0xB7
#define W25X_Exit4ByteAddr      0xE9

void W25QXX_Init(void);
u16  W25QXX_ReadID(void);  	    		//读取FLASH ID
u8	 W25QXX_ReadSR(u8 regno);        		//读取状态寄存器 
void W25QXX_4ByteAddr_Enable(void);           //使能4字节地址模式
void W25QXX_Write_SR(u8 regno,u8 sr);  			//写状态寄存器
void W25QXX_Write_Enable(void);  		//写使能 
void W25QXX_Write_Disable(void);		//写保护
void W25QXX_Write_Page(u8* pBuffer,u32 WriteAddr,u16 NumByteToWrite);
void W25QXX_Write_NoCheck(u8* pBuffer,u32 WriteAddr,u16 NumByteToWrite);
void W25QXX_Read(u8* pBuffer,u32 ReadAddr,u16 NumByteToRead);   //读取flash
void W25QXX_Write(u8* pBuffer,u32 WriteAddr,u16 NumByteToWrite);//写入flash
void W25QXX_Erase_Chip(void);    	  	//整片擦除
void W25QXX_Erase_Sector(u32 Dst_Addr);	//扇区擦除
void W25QXX_Wait_Busy(void);           	//等待空闲
void W25QXX_PowerDown(void);        	//进入掉电模式
void W25QXX_WAKEUP(void);				//唤醒
#endif

文章来源:https://blog.csdn.net/sugang1990/article/details/135490118
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