网站后端开发软件,哈尔滨如何免费制作网站,网站推广经验杂谈,如何用易语言做网站stm32基于HAL库驱动外部SPI flash制作虚拟U盘 #x1f4cc;参考文章#xff1a;https://xiaozhuanlan.com/topic/6058234791#x1f39e;实现效果演示#xff1a; #x1f516;上图中的读到的FLASH_ID所指的是针对不同容量#xff0c;所对应的ID。 //W25X/Q不同容量对应… stm32基于HAL库驱动外部SPI flash制作虚拟U盘 参考文章https://xiaozhuanlan.com/topic/6058234791实现效果演示 上图中的读到的FLASH_ID所指的是针对不同容量所对应的ID。 //W25X/Q不同容量对应不同ID关系
W25Q80 ID 0XEF13
W25Q16 ID 0XEF14
W25Q32 ID 0XEF15
W25Q64 ID 0XEF16
W25Q128 ID 0XEF17
W25Q256 ID 0XEF18在电脑端支持对虚拟出来的存储器进行读写操作。 ✨如果设计成一块PCB可以制作成一个微小容量的移动U盘。 基于STM32F103HAL库生成的代码可以移植到任意支持USB接口的STM32单片机上使用。程序烧录后通过PA11/PA12 USB初次连接电脑会弹出提示格式化窗口。之后就可以使用包括拷贝和创建文件到盘符内保存数据后拔插设备数据不丢失。
stm32cumx配置 stm32cumx使能对应的SPI接口 ✨串口非必须只是方便调试时查看读取是否支持。 使能SPI接口尽量将SPI速度配置低一点防止访问和写入出错 配置SPI CS片选引脚 使能USB外设 时钟配置为48MHz 使能调试接口 勾选中间件 调整堆栈区大小
Keil工程修改
导入驱动文件bsp_spi_flash.c和bsp_spi_flash.h到工程对应文件夹下 修改usbd_storage_if.c文件内容
/* USER CODE BEGIN INCLUDE */
#include bsp_spi_flash.h //将驱动头文件包含进来
/* USER CODE END INCLUDE */
//注释掉自动生成的以下3个宏定义
//#define STORAGE_LUN_NBR 1
//#define STORAGE_BLK_NBR 0x10000
//#define STORAGE_BLK_SIZ 0x200/* USER CODE BEGIN PRIVATE_DEFINES */
//重新定义以下3个宏
#define STORAGE_LUN_NBR 1
#define STORAGE_BLK_NBR 2048 //块数量256*8扇区8MByte
#define STORAGE_BLK_SIZ 4096 //每个扇区4096Byte
/* USER CODE END PRIVATE_DEFINES */ ✨这里的STORAGE_BLK_NBR宏代表外部SPI FLASH 容量大小2048 代表为8MB如果spi flash容量为16MB那么这里就是4096.以此类推4MB spi flash就是1024 补充以下函数内容usbd_storage_if.c文件内
int8_t STORAGE_Init_FS(uint8_t lun)
{/* USER CODE BEGIN 2 */W25QXX_Init();return (USBD_OK);/* USER CODE END 2 */
}int8_t STORAGE_GetCapacity_FS(uint8_t lun, uint32_t *block_num, uint16_t *block_size)
{/* USER CODE BEGIN 3 */*block_num STORAGE_BLK_NBR;*block_size STORAGE_BLK_SIZ;return (USBD_OK);/* USER CODE END 3 */
}int8_t STORAGE_IsReady_FS(uint8_t lun)
{/* USER CODE BEGIN 4 */u16 flash_ID;flash_ID W25QXX_ReadID();printf(flash_ID:%d \r\n,flash_ID);//非必须如需要调试包含stdio.h头文件启用串口return (USBD_OK);/* USER CODE END 4 */
}int8_t STORAGE_Read_FS(uint8_t lun, uint8_t *buf, uint32_t blk_addr, uint16_t blk_len)
{/* USER CODE BEGIN 6 */blk_addr SPI_FLASH_START_SECTOR;SPI_FLASH_BufferRead(buf, blk_addr * SPI_FLASH_SECTOR_SIZE, blk_len * SPI_FLASH_SECTOR_SIZE);return (USBD_OK);/* USER CODE END 6 */
}
int8_t STORAGE_Write_FS(uint8_t lun, uint8_t *buf, uint32_t blk_addr, uint16_t blk_len)
{/* USER CODE BEGIN 7 */uint32_t write_addr;blk_addr SPI_FLASH_START_SECTOR;write_addr blk_addr * SPI_FLASH_SECTOR_SIZE;SPI_FLASH_SectorErase(write_addr);SPI_FLASH_BufferWrite((uint8_t*)buf, write_addr, blk_len * SPI_FLASH_SECTOR_SIZE);return (USBD_OK);/* USER CODE END 7 */
}int8_t STORAGE_GetMaxLun_FS(void)
{/* USER CODE BEGIN 8 */return (STORAGE_LUN_NBR - 1);/* USER CODE END 8 */
}main.c文件
/* USER CODE BEGIN Includes */
#include bsp_spi_flash.h
#include stdio.h//用于调试串口输出
/* USER CODE END Includes */
int main(void)
{/* USER CODE BEGIN 1 *//* USER CODE END 1 *//* MCU Configuration--------------------------------------------------------*//* Reset of all peripherals, Initializes the Flash interface and the Systick. */HAL_Init();/* USER CODE BEGIN Init *//* USER CODE END Init *//* Configure the system clock */SystemClock_Config();/* USER CODE BEGIN SysInit *//* USER CODE END SysInit *//* Initialize all configured peripherals */MX_GPIO_Init();MX_SPI1_Init();MX_USB_DEVICE_Init();MX_USART1_UART_Init();/* USER CODE BEGIN 2 */W25QXX_Init();//初始化/* USER CODE END 2 *//* Infinite loop *//* USER CODE BEGIN WHILE */while (1){/* USER CODE END WHILE *//* USER CODE BEGIN 3 */}/* USER CODE END 3 */
}
驱动文件
bsp_spi_flash.h内容
#ifndef __SPI_FLASH_H
#define __SPI_FLASH_H#include stm32f1xx.h
#include stm32f1xx_hal_spi.h/* ???????? ----------------------------------------------------------------*/
#include stm32f1xx_hal.htypedef uint32_t u32;
typedef uint8_t u8;//
typedef uint16_t u16;#define SPI_FLASH_REBUILD 0 //1:???????????Flash??0??????????????Flash
#define SPI_FLASH_SECTOR_SIZE 4096 // ????Flash????????
#define SPI_FLASH_START_SECTOR 256*4 // ????Flash?????FatFS?????
#define SPI_FLASH_SECTOR_COUNT 256 // ????Flash?????FatFS???????????
//W25X/Q不同容量对应不同ID关系
//W25Q80 ID 0XEF13
//W25Q16 ID 0XEF14
//W25Q32 ID 0XEF15
//W25Q64 ID 0XEF16
//W25Q128 ID 0XEF17
//W25Q256 ID 0XEF18
//#define W25Q80 0XEF13
//#define W25Q16 0XEF14
//#define W25Q32 0XEF15
#define W25Q64 0XEF16
//#define W25Q128 0XEF17
//#define W25Q256 0XEF18
//#define sFLASH_ID 0XEF4017 //W25Q64
#define sFLASH_ID 0XEF16
extern SPI_HandleTypeDef hspi1;
extern u16 W25QXX_TYPE; //????W25QXX??????//#define W25QXX_CS PBout(12) //W25QXX片选引脚
#define W25QXX_CS_1 HAL_GPIO_WritePin(GPIOA,GPIO_PIN_4,GPIO_PIN_SET)
#define W25QXX_CS_0 HAL_GPIO_WritePin(GPIOA,GPIO_PIN_4,GPIO_PIN_RESET)#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 0xE9void W25QXX_Init(void);
u16 W25QXX_ReadID(void); //???FLASH ID
void W25QXX_WAKEUP(void); //????
void SPI_FLASH_SectorErase(u32 SectorAddr);
void SPI_FLASH_BufferWrite(u8* pBuffer, u32 WriteAddr, u16 NumByteToWrite);
void SPI_FLASH_BufferRead(u8* pBuffer, u32 ReadAddr, u16 NumByteToRead);
void SPI_FLASH_PageWrite(u8* pBuffer, u32 WriteAddr, u16 NumByteToWrite);
#endif /* __SPI_FLASH_H */
bsp_spi_flash.c内容
#include bsp_spi_flash.h
//需要重新添加代码
#include stm32f1xx_hal_gpio.h
#include stdio.hu16 W25QXX_TYPE W25Q64; //设置SPI存储器型号extern SPI_HandleTypeDef hspi1;u8 W25QXX_ReadSR(u8 regno); //??????????
void W25QXX_4ByteAddr_Enable(void); //???4???????
void W25QXX_Write_SR(u8 regno,u8 sr); //?????????
void W25QXX_Write_Enable(void); //?????
void W25QXX_Write_Disable(void); //??????
void W25QXX_Write_NoCheck(u8* pBuffer,u32 WriteAddr,u16 NumByteToWrite);
void W25QXX_Read(u8* pBuffer,u32 ReadAddr,u16 NumByteToRead); //???flash
void W25QXX_Write(u8* pBuffer,u32 WriteAddr,u16 NumByteToWrite);//????flash
void W25QXX_Erase_Chip(void); //???????
void W25QXX_Erase_Sector(u32 Dst_Addr); //????????
void W25QXX_Wait_Busy(void); //???????
void W25QXX_PowerDown(void); //?????????//SPI1 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 Rxdata;HAL_SPI_TransmitReceive(hspi1,TxData,Rxdata,1, 1000);return Rxdata; //返回收到的数据
}void SPI2_SetSpeed(u8 SPI_BaudRatePrescaler)
{assert_param(IS_SPI_BAUDRATE_PRESCALER(SPI_BaudRatePrescaler));//判断有效性__HAL_SPI_DISABLE(hspi1); //关闭SPIhspi1.Instance-CR10XFFC7; //位3-5清零用来设置波特率hspi1.Instance-CR1|SPI_BaudRatePrescaler;//设置SPI速度__HAL_SPI_ENABLE(hspi1); //使能SPI}//初始化SPI FLASH的IO口
void W25QXX_Init(void)
{u8 temp;GPIO_InitTypeDef GPIO_Initure;// __HAL_RCC_GPIOB_CLK_ENABLE(); //使能GPIOB时钟__HAL_RCC_GPIOA_CLK_ENABLE(); //使能GPIOB时钟//PA4GPIO_Initure.PinGPIO_PIN_4; //PA4GPIO_Initure.ModeGPIO_MODE_OUTPUT_PP; //推挽输出GPIO_Initure.PullGPIO_PULLUP; //上拉GPIO_Initure.SpeedGPIO_SPEED_FREQ_HIGH;//高速 HAL_GPIO_Init(GPIOA,GPIO_Initure); //初始化W25QXX_CS_1; //SPI FLASH不选中
// SPI2_Init(); //初始化SPISPI2_SetSpeed(SPI_BAUDRATEPRESCALER_2); //设置为42M时钟,高速模式W25QXX_TYPE W25QXX_ReadID(); //读取FLASH ID.printf(flash_ID:%d \r\n,W25QXX_TYPE);
// if(W25QXX_TYPEW25Q64) //SPI FLASH为W25Q32
// {tempW25QXX_ReadSR(3); //读取状态寄存器3判断地址模式if((temp0X01)0) //如果不是4字节地址模式,则进入4字节地址模式{W25QXX_CS_0; //选中SPI2_ReadWriteByte(W25X_Enable4ByteAddr);//发送进入4字节地址模式指令 W25QXX_CS_1; //取消片选 }
// }
}
//读取W25QXX的状态寄存器W25QXX一共有3个状态寄存器
//状态寄存器1
//BIT7 6 5 4 3 2 1 0
//SPR RV TB BP2 BP1 BP0 WEL BUSY
//SPR:默认0,状态寄存器保护位,配合WP使用
//TB,BP2,BP1,BP0:FLASH区域写保护设置
//WEL:写使能锁定
//BUSY:忙标记位(1,忙;0,空闲)
//默认:0x00
//状态寄存器2
//BIT7 6 5 4 3 2 1 0
//SUS CMP LB3 LB2 LB1 (R) QE SRP1
//状态寄存器3
//BIT7 6 5 4 3 2 1 0
//HOLD/RST DRV1 DRV0 (R) (R) WPS ADP ADS
//regno:状态寄存器号范:1~3
//返回值:状态寄存器值
u8 W25QXX_ReadSR(u8 regno)
{u8 byte0,command0;switch(regno){case 1:commandW25X_ReadStatusReg1; //读状态寄存器1指令break;case 2:commandW25X_ReadStatusReg2; //读状态寄存器2指令break;case 3:commandW25X_ReadStatusReg3; //读状态寄存器3指令break;default:commandW25X_ReadStatusReg1;break;}W25QXX_CS_0; //使能器件SPI2_ReadWriteByte(command); //发送读取状态寄存器命令byteSPI2_ReadWriteByte(0Xff); //读取一个字节W25QXX_CS_1; //取消片选return byte;
}
//写W25QXX状态寄存器
void W25QXX_Write_SR(u8 regno,u8 sr)
{u8 command0;switch(regno){case 1:commandW25X_WriteStatusReg1; //写状态寄存器1指令break;case 2:commandW25X_WriteStatusReg2; //写状态寄存器2指令break;case 3:commandW25X_WriteStatusReg3; //写状态寄存器3指令break;default:commandW25X_WriteStatusReg1;break;}W25QXX_CS_0; //使能器件SPI2_ReadWriteByte(command); //发送写取状态寄存器命令SPI2_ReadWriteByte(sr); //写入一个字节W25QXX_CS_1; //取消片选
}
//W25QXX写使能
//将WEL置位
void W25QXX_Write_Enable(void)
{W25QXX_CS_0; //使能器件SPI2_ReadWriteByte(W25X_WriteEnable); //发送写使能W25QXX_CS_1; //取消片选
}
//W25QXX写禁止
//将WEL清零
void W25QXX_Write_Disable(void)
{W25QXX_CS_0; //使能器件SPI2_ReadWriteByte(W25X_WriteDisable); //发送写禁止指令W25QXX_CS_1; //取消片选
}//读取芯片ID
//返回值如下:
//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
//0XEF18,表示芯片型号为W25Q256
u16 W25QXX_ReadID(void)
{u16 Temp 0;W25QXX_CS_0;SPI2_ReadWriteByte(0x90);//发送读取ID命令SPI2_ReadWriteByte(0x00);SPI2_ReadWriteByte(0x00);SPI2_ReadWriteByte(0x00);Temp|SPI2_ReadWriteByte(0xFF)8;Temp|SPI2_ReadWriteByte(0xFF);W25QXX_CS_1;return Temp;
}
//读取SPI FLASH
//在指定地址开始读取指定长度的数据
//pBuffer:数据存储区
//ReadAddr:开始读取的地址(24bit)
//NumByteToRead:要读取的字节数(最大65535)
void W25QXX_Read(u8* pBuffer,u32 ReadAddr,u16 NumByteToRead)
{u16 i;W25QXX_CS_0; //使能器件SPI2_ReadWriteByte(W25X_ReadData); //发送读取命令
// if(W25QXX_TYPE W25Q256) //如果是W25Q256的话地址为4字节的要发送最高8位
// {
// SPI2_ReadWriteByte((u8)((ReadAddr)24));
// }SPI2_ReadWriteByte((u8)((ReadAddr)16)); //发送24bit地址SPI2_ReadWriteByte((u8)((ReadAddr)8));SPI2_ReadWriteByte((u8)ReadAddr);for(i0;iNumByteToRead;i){pBuffer[i]SPI2_ReadWriteByte(0XFF); //循环读数}W25QXX_CS_1;
}
/**
* brief 读取FLASH数据
* param pBuffer存储读出数据的指针
* param ReadAddr读取地址
* param NumByteToRead读取数据长度
* retval 无
*/
void SPI_FLASH_BufferRead(u8* pBuffer, u32 ReadAddr, u16 NumByteToRead)
{/* 选择FLASH: CS低电平 */W25QXX_CS_0;/* 发送 读 指令 */SPI2_ReadWriteByte(W25X_ReadData);/* 发送 读 地址高位 */SPI2_ReadWriteByte((ReadAddr 0xFF0000) 16);/* 发送 读 地址中位 */SPI2_ReadWriteByte((ReadAddr 0xFF00) 8);/* 发送 读 地址低位 */SPI2_ReadWriteByte(ReadAddr 0xFF);/* 读取数据 */while (NumByteToRead--) /* while there is data to be read */{/* 读取一个字节*/*pBuffer SPI2_ReadWriteByte(0xFF);/* 指向下一个字节缓冲区 */pBuffer;}/* 停止信号 FLASH: CS 高电平 */W25QXX_CS_1;
}
#define WIP_Flag 0x01/*** brief 等待WIP(BUSY)标志被置0即等待到FLASH内部数据写入完毕* param none* retval none*/
void SPI_FLASH_WaitForWriteEnd(void)
{u8 FLASH_Status 0;/* 选择 FLASH: CS 低 */W25QXX_CS_0;/* 发送 读状态寄存器 命令 */SPI2_ReadWriteByte(W25X_ReadStatusReg1);/* 若FLASH忙碌则等待 */do{/* 读取FLASH芯片的状态寄存器 */FLASH_Status SPI2_ReadWriteByte(0xFF);}while ((FLASH_Status WIP_Flag) SET); /* 正在写入标志 *//* 停止信号 FLASH: CS 高 */W25QXX_CS_1;
}/*** brief 擦除FLASH扇区* param SectorAddr要擦除的扇区地址* retval 无*/
void SPI_FLASH_SectorErase(u32 SectorAddr)
{/* 发送FLASH写使能命令 */W25QXX_Write_Enable();SPI_FLASH_WaitForWriteEnd();/* 擦除扇区 *//* 选择FLASH: CS低电平 */W25QXX_CS_0;/* 发送扇区擦除指令*/SPI2_ReadWriteByte(W25X_SectorErase);/*发送擦除扇区地址的高位*/SPI2_ReadWriteByte((u8)((SectorAddr)16)); //发送24bit地址SPI2_ReadWriteByte((u8)((SectorAddr)8));/* 发送擦除扇区地址的低位 */SPI2_ReadWriteByte(SectorAddr 0xFF);/* 停止信号 FLASH: CS 高电平 */W25QXX_CS_1;/* 等待擦除完毕*/SPI_FLASH_WaitForWriteEnd();
}
/* WIP(busy)标志FLASH内部正在写入 */#define SPI_FLASH_PageSize 256
#define SPI_FLASH_PerWritePageSize 256
/*** brief 对FLASH按页写入数据调用本函数写入数据前需要先擦除扇区* param pBuffer要写入数据的指针* param WriteAddr写入地址* param NumByteToWrite写入数据长度必须小于等于SPI_FLASH_PerWritePageSize* retval 无*/
void SPI_FLASH_PageWrite(u8* pBuffer, u32 WriteAddr, u16 NumByteToWrite)
{/* 发送FLASH写使能命令 */W25QXX_Write_Enable();/* 选择FLASH: CS低电平 */W25QXX_CS_0;/* 写页写指令*/SPI2_ReadWriteByte(W25X_PageProgram);/*发送写地址的高位*/SPI2_ReadWriteByte((WriteAddr 0xFF0000) 16);/*发送写地址的中位*/SPI2_ReadWriteByte((WriteAddr 0xFF00) 8);/*发送写地址的低位*/SPI2_ReadWriteByte(WriteAddr 0xFF);if(NumByteToWrite SPI_FLASH_PageSize){NumByteToWrite SPI_FLASH_PerWritePageSize;//FLASH_ERROR(SPI_FLASH_PageWrite too large!);}/* 写入数据*/while (NumByteToWrite--){/* 发送当前要写入的字节数据 */SPI2_ReadWriteByte(*pBuffer);/* 指向下一字节数据 */pBuffer;}/* 停止信号 FLASH: CS 高电平 */W25QXX_CS_1;/* 等待写入完毕*/SPI_FLASH_WaitForWriteEnd();
}//SPI在一页(0~65535)内写入少于256个字节的数据
//在指定地址开始写入最大256字节的数据
//pBuffer:数据存储区
//WriteAddr:开始写入的地址(24bit)
//NumByteToWrite:要写入的字节数(最大256),该数不应该超过该页的剩余字节数!!!
void W25QXX_Write_Page(u8* pBuffer,u32 WriteAddr,u16 NumByteToWrite)
{u16 i;W25QXX_Write_Enable(); //SET WELW25QXX_CS_0; //使能器件SPI2_ReadWriteByte(W25X_PageProgram); //发送写页命令
// if(W25QXX_TYPEW25Q256) //如果是W25Q256的话地址为4字节的要发送最高8位
// {
// SPI2_ReadWriteByte((u8)((WriteAddr)24));
// }SPI2_ReadWriteByte((u8)((WriteAddr)16)); //发送24bit地址SPI2_ReadWriteByte((u8)((WriteAddr)8));SPI2_ReadWriteByte((u8)WriteAddr);for(i0;iNumByteToWrite;i)SPI2_ReadWriteByte(pBuffer[i]);//循环写数W25QXX_CS_1; //取消片选SPI_FLASH_WaitForWriteEnd(); //等待写入结束
}/*** brief 对FLASH写入数据调用本函数写入数据前需要先擦除扇区* param pBuffer要写入数据的指针* param WriteAddr写入地址* param NumByteToWrite写入数据长度* retval 无*/
void SPI_FLASH_BufferWrite(u8* pBuffer, u32 WriteAddr, u16 NumByteToWrite)
{u8 NumOfPage 0, NumOfSingle 0, Addr 0, count 0, temp 0;/*mod运算求余若writeAddr是SPI_FLASH_PageSize整数倍运算结果Addr值为0*/Addr WriteAddr % SPI_FLASH_PageSize;/*差count个数据值刚好可以对齐到页地址*/count SPI_FLASH_PageSize - Addr;/*计算出要写多少整数页*/NumOfPage NumByteToWrite / SPI_FLASH_PageSize;/*mod运算求余计算出剩余不满一页的字节数*/NumOfSingle NumByteToWrite % SPI_FLASH_PageSize;/* Addr0,则WriteAddr 刚好按页对齐 aligned */if (Addr 0){/* NumByteToWrite SPI_FLASH_PageSize */if (NumOfPage 0){SPI_FLASH_PageWrite(pBuffer, WriteAddr, NumByteToWrite);}else /* NumByteToWrite SPI_FLASH_PageSize */{/*先把整数页都写了*/while (NumOfPage--){SPI_FLASH_PageWrite(pBuffer, WriteAddr, SPI_FLASH_PageSize);WriteAddr SPI_FLASH_PageSize;pBuffer SPI_FLASH_PageSize;}/*若有多余的不满一页的数据把它写完*/SPI_FLASH_PageWrite(pBuffer, WriteAddr, NumOfSingle);}}/* 若地址与 SPI_FLASH_PageSize 不对齐 */else{/* NumByteToWrite SPI_FLASH_PageSize */if (NumOfPage 0){/*当前页剩余的count个位置比NumOfSingle小一页写不完*/if (NumOfSingle count){temp NumOfSingle - count;/*先写满当前页*/SPI_FLASH_PageWrite(pBuffer, WriteAddr, count);WriteAddr count;pBuffer count;/*再写剩余的数据*/SPI_FLASH_PageWrite(pBuffer, WriteAddr, temp);}else /*当前页剩余的count个位置能写完NumOfSingle个数据*/{SPI_FLASH_PageWrite(pBuffer, WriteAddr, NumByteToWrite);}}else /* NumByteToWrite SPI_FLASH_PageSize */{/*地址不对齐多出的count分开处理不加入这个运算*/NumByteToWrite - count;NumOfPage NumByteToWrite / SPI_FLASH_PageSize;NumOfSingle NumByteToWrite % SPI_FLASH_PageSize;/* 先写完count个数据为的是让下一次要写的地址对齐 */SPI_FLASH_PageWrite(pBuffer, WriteAddr, count);/* 接下来就重复地址对齐的情况 */WriteAddr count;pBuffer count;/*把整数页都写了*/while (NumOfPage--){SPI_FLASH_PageWrite(pBuffer, WriteAddr, SPI_FLASH_PageSize);WriteAddr SPI_FLASH_PageSize;pBuffer SPI_FLASH_PageSize;}/*若有多余的不满一页的数据把它写完*/if (NumOfSingle ! 0){SPI_FLASH_PageWrite(pBuffer, WriteAddr, NumOfSingle);}}}
}//无检验写SPI FLASH
//必须确保所写的地址范围内的数据全部为0XFF,否则在非0XFF处写入的数据将失败!
//具有自动换页功能
//在指定地址开始写入指定长度的数据,但是要确保地址不越界!
//pBuffer:数据存储区
//WriteAddr:开始写入的地址(24bit)
//NumByteToWrite:要写入的字节数(最大65535)
//CHECK OK
void W25QXX_Write_NoCheck(u8* pBuffer,u32 WriteAddr,u16 NumByteToWrite)
{u16 pageremain;pageremain256-WriteAddr%256; //单页剩余的字节数if(NumByteToWritepageremain)pageremainNumByteToWrite;//不大于256个字节while(1){W25QXX_Write_Page(pBuffer,WriteAddr,pageremain);if(NumByteToWritepageremain)break;//写入结束了else //NumByteToWritepageremain{pBufferpageremain;WriteAddrpageremain;NumByteToWrite-pageremain; //减去已经写入了的字节数if(NumByteToWrite256)pageremain256; //一次可以写入256个字节else pageremainNumByteToWrite; //不够256个字节了}};
}
//写SPI FLASH
//在指定地址开始写入指定长度的数据
//该函数带擦除操作!
//pBuffer:数据存储区
//WriteAddr:开始写入的地址(24bit)
//NumByteToWrite:要写入的字节数(最大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_BUFW25QXX_BUFFER;secposWriteAddr/4096;//扇区地址secoffWriteAddr%4096;//在扇区内的偏移secremain4096-secoff;//扇区剩余空间大小//printf(ad:%X,nb:%X\r\n,WriteAddr,NumByteToWrite);//测试用if(NumByteToWritesecremain)secremainNumByteToWrite;//不大于4096个字节while(1){W25QXX_Read(W25QXX_BUF,secpos*4096,4096);//读出整个扇区的内容for(i0;isecremain;i)//校验数据{if(W25QXX_BUF[secoffi]!0XFF)break;//需要擦除}if(isecremain)//需要擦除{W25QXX_Erase_Sector(secpos);//擦除这个扇区for(i0;isecremain;i) //复制{W25QXX_BUF[isecoff]pBuffer[i];}W25QXX_Write_NoCheck(W25QXX_BUF,secpos*4096,4096);//写入整个扇区}else W25QXX_Write_NoCheck(pBuffer,WriteAddr,secremain);//写已经擦除了的,直接写入扇区剩余区间.if(NumByteToWritesecremain)break;//写入结束了else//写入未结束{secpos;//扇区地址增1secoff0;//偏移位置为0pBuffersecremain; //指针偏移WriteAddrsecremain;//写地址偏移NumByteToWrite-secremain; //字节数递减if(NumByteToWrite4096)secremain4096; //下一个扇区还是写不完else secremainNumByteToWrite; //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 WELW25QXX_Wait_Busy();W25QXX_CS_0; //使能器件SPI2_ReadWriteByte(W25X_ChipErase); //发送片擦除命令W25QXX_CS_1; //取消片选W25QXX_Wait_Busy(); //等待芯片擦除结束
}
//擦除一个扇区
//Dst_Addr:扇区地址 根据实际容量设置
//擦除一个扇区的最少时间:150ms
void W25QXX_Erase_Sector(u32 Dst_Addr)
{//监视falsh擦除情况,测试用//printf(fe:%x\r\n,Dst_Addr);Dst_Addr*4096;W25QXX_Write_Enable(); //SET WELW25QXX_Wait_Busy();W25QXX_CS_0; //使能器件SPI2_ReadWriteByte(W25X_SectorErase); //发送扇区擦除指令if(W25QXX_TYPEW25Q64) //如果是W25Q256的话地址为4字节的要发送最高8位{SPI2_ReadWriteByte((u8)((Dst_Addr)24));}SPI2_ReadWriteByte((u8)((Dst_Addr)16)); //发送24bit地址SPI2_ReadWriteByte((u8)((Dst_Addr)8));SPI2_ReadWriteByte((u8)Dst_Addr);W25QXX_CS_1; //取消片选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位清空
}
//进入掉电模式
void W25QXX_PowerDown(void)
{W25QXX_CS_0; //使能器件SPI2_ReadWriteByte(W25X_PowerDown); //发送掉电命令W25QXX_CS_1; //取消片选//delay_us(3); //等待TPD
}
//唤醒
void W25QXX_WAKEUP(void)
{W25QXX_CS_0; //使能器件SPI2_ReadWriteByte(W25X_ReleasePowerDown); // send W25X_PowerDown command 0xABW25QXX_CS_1; //取消片选//delay_us(3); //等待TRES1
}
工程源码
链接https://pan.baidu.com/s/164MW7mOR8fnaHZUC0dt7SQ
提取码0nei
