1、模拟SPI方式的IO配置
2、驱动代码2.1 头文件- #ifndef __W25QXX_H
- #define __W25QXX_H
- #include "main.h"
- //W25X系列/Q系列芯片列表
- //W25Q80 ID 0XEF13
- //W25Q16 ID 0XEF14
- //W25Q32 ID 0XEF15
- //W25Q64 ID 0XEF16
- //W25Q128 ID 0XEF17
- #define W25Q80 0XEF13
- #define W25Q16 0XEF14
- #define W25Q32 0XEF15
- #define W25Q64 0XEF16
- #define W25Q128 0XEF17
- extern uint16_t W25QXX_TYPE; //定义W25QXX芯片型号
- extern uint32_t W25QXX_SIZE; //容量
- extern uint8_t W25QXX_UID[]; //唯一ID
- //
- //指令表
- #define W25X_WriteEnable 0x06
- #define W25X_WriteDisable 0x04
- #define W25X_ReadStatusReg 0x05
- #define W25X_WriteStatusReg 0x01
- #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
- void W25QXX_Init(void);
- uint16_t W25QXX_ReadID(void); //读取FLASH ID
- void W25QXX_ReadUniqueID(uint8_t UID[8]); //读取唯一ID
- uint32_t W25QXX_ReadCapacity(void); //读取容量
- uint8_t W25QXX_ReadSR(void); //读取状态寄存器
- void W25QXX_Write_SR(uint8_t 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_NoCheck(uint8_t* pBuffer,uint32_t WriteAddr,uint16_t NumByteToWrite);
- void W25QXX_Read(uint8_t* pBuffer,uint32_t ReadAddr,uint16_t NumByteToRead); //读取flash
- void W25QXX_Write(uint8_t* pBuffer,uint32_t WriteAddr,uint16_t NumByteToWrite);//写入flash
- void W25QXX_Erase_Chip(void); //整片擦除
- void W25QXX_Erase_Sector(uint32_t 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
复制代码 2.2 源文件- #include "w25qxx.h"
- uint16_t W25QXX_TYPE = 0;
- uint32_t W25QXX_SIZE = 0;
- uint8_t W25QXX_UID[8] = {0};
- ///
- /// 移植修改区
- ///
- ///
- #define W25QXX_CS_H() HAL_GPIO_WritePin(GPIOA, GPIO_PIN_15, GPIO_PIN_SET)
- #define W25QXX_CS_L() HAL_GPIO_WritePin(GPIOA, GPIO_PIN_15, GPIO_PIN_RESET)
- #define W25QXX_SCK_H() HAL_GPIO_WritePin(GPIOB, GPIO_PIN_3, GPIO_PIN_SET)
- #define W25QXX_SCK_L() HAL_GPIO_WritePin(GPIOB, GPIO_PIN_3, GPIO_PIN_RESET)
- #define W25QXX_MOSI_H() HAL_GPIO_WritePin(GPIOB, GPIO_PIN_5, GPIO_PIN_SET)
- #define W25QXX_MOSI_L() HAL_GPIO_WritePin(GPIOB, GPIO_PIN_5, GPIO_PIN_RESET)
- #define W25QXX_MISO_GET() (HAL_GPIO_ReadPin(GPIOB, GPIO_PIN_4) == GPIO_PIN_SET ? 1 : 0)
- static void delay_us(uint32_t us)
- {
- uint32_t delay = (HAL_RCC_GetHCLKFreq() / 4000000 * us);
- while (delay--)
- {
- ;
- }
- }
- static uint8_t W25QXX_SPI_ReadWriteByte(uint8_t TxData)
- {
- int i = 0;
- uint8_t RxData = 0;
- W25QXX_SCK_L();
- for(i = 7; i >= 0; i--)
- {
- W25QXX_SCK_L();
- if(TxData & (1 << i))
- {
- W25QXX_MOSI_H();
- }
- else
- {
- W25QXX_MOSI_L();
- }
- delay_us(1);
- W25QXX_SCK_H();
- RxData <<= 1;
- RxData |= W25QXX_MISO_GET();
- delay_us(1);
- }
- W25QXX_SCK_L();
- return RxData;
- }
- static void W25QXX_SPI_Init(void)
- {
- // 这里添加初始化IO的代码
- }
- ///
- /// 驱动代码
- ///
- ///
- //4Kbytes为一个Sector
- //16个扇区为1个Block
- //W25Q128
- //容量为16M字节,共有128个Block,4096个Sector
- //初始化SPI FLASH的IO口
- void W25QXX_Init(void)
- {
- W25QXX_SPI_Init();
- W25QXX_CS_H(); // 取消片选
- W25QXX_SCK_L(); // 时钟空闲为低电平
- W25QXX_CS_L();
- W25QXX_SPI_ReadWriteByte(0XFF);
- W25QXX_CS_H();
- W25QXX_TYPE=W25QXX_ReadID(); //读取FLASH ID
- W25QXX_SIZE=W25QXX_ReadCapacity(); //读取容量
- W25QXX_ReadUniqueID(W25QXX_UID); //读取唯一ID
- }
- uint32_t W25QXX_ReadCapacity(void)
- {
- int i = 0;
- uint8_t arr[4] = {0,0,0,0};
- W25QXX_CS_L();
- W25QXX_SPI_ReadWriteByte(0x5A);
- W25QXX_SPI_ReadWriteByte(0x00);
- W25QXX_SPI_ReadWriteByte(0x00);
- W25QXX_SPI_ReadWriteByte(0x84);
- W25QXX_SPI_ReadWriteByte(0x00);
- for(i = 0; i < sizeof(arr); i++)
- {
- arr<i> = W25QXX_SPI_ReadWriteByte(0xFF);
- }
- W25QXX_CS_H();
- return ((((*(uint32_t *)arr)) + 1) >> 3);
- }
- void W25QXX_ReadUniqueID(uint8_t UID[8])
- {
- int i = 0;
- W25QXX_CS_L();
- W25QXX_SPI_ReadWriteByte(0x4B);
- W25QXX_SPI_ReadWriteByte(0x00);
- W25QXX_SPI_ReadWriteByte(0x00);
- W25QXX_SPI_ReadWriteByte(0x00);
- W25QXX_SPI_ReadWriteByte(0x00);
- for(i = 0; i < 8; i++)
- {
- UID<i> = W25QXX_SPI_ReadWriteByte(0xFF);
- }
- W25QXX_CS_H();
- }
- //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
- uint8_t W25QXX_ReadSR(void)
- {
- uint8_t byte=0;
- W25QXX_CS_L(); //使能器件
- W25QXX_SPI_ReadWriteByte(W25X_ReadStatusReg); //发送读取状态寄存器命令
- byte=W25QXX_SPI_ReadWriteByte(0Xff); //读取一个字节
- W25QXX_CS_H(); //取消片选
- return byte;
- }
- //写W25QXX状态寄存器
- //只有SPR,TB,BP2,BP1,BP0(bit 7,5,4,3,2)可以写!!!
- void W25QXX_Write_SR(uint8_t sr)
- {
- W25QXX_CS_L(); //使能器件
- W25QXX_SPI_ReadWriteByte(W25X_WriteStatusReg);//发送写取状态寄存器命令
- W25QXX_SPI_ReadWriteByte(sr); //写入一个字节
- W25QXX_CS_H(); //取消片选
- }
- //W25QXX写使能
- //将WEL置位
- void W25QXX_Write_Enable(void)
- {
- W25QXX_CS_L(); //使能器件
- W25QXX_SPI_ReadWriteByte(W25X_WriteEnable); //发送写使能
- W25QXX_CS_H(); //取消片选
- }
- //W25QXX写禁止
- //将WEL清零
- void W25QXX_Write_Disable(void)
- {
- W25QXX_CS_L(); //使能器件
- W25QXX_SPI_ReadWriteByte(W25X_WriteDisable); //发送写禁止指令
- W25QXX_CS_H(); //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
- uint16_t W25QXX_ReadID(void)
- {
- uint16_t Temp = 0;
- W25QXX_CS_L();
- W25QXX_SPI_ReadWriteByte(0x90);//发送读取ID命令
- W25QXX_SPI_ReadWriteByte(0x00);
- W25QXX_SPI_ReadWriteByte(0x00);
- W25QXX_SPI_ReadWriteByte(0x00);
- Temp|=W25QXX_SPI_ReadWriteByte(0xFF)<<8;
- Temp|=W25QXX_SPI_ReadWriteByte(0xFF);
- W25QXX_CS_H();
- 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(uint8_t* pBuffer,uint32_t ReadAddr,uint16_t NumByteToRead)
- {
- uint16_t i;
- W25QXX_CS_L(); //使能器件
- W25QXX_SPI_ReadWriteByte(W25X_ReadData); //发送读取命令
- W25QXX_SPI_ReadWriteByte((uint8_t)((ReadAddr)>>16)); //发送24bit地址
- W25QXX_SPI_ReadWriteByte((uint8_t)((ReadAddr)>>8));
- W25QXX_SPI_ReadWriteByte((uint8_t)ReadAddr);
- for(i=0; i<NumByteToRead; i++)
- {
- pBuffer<i>=W25QXX_SPI_ReadWriteByte(0XFF); //循环读数
- }
- W25QXX_CS_H();
- }
- //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(uint8_t* pBuffer,uint32_t WriteAddr,uint16_t NumByteToWrite)
- {
- uint16_t i;
- W25QXX_Write_Enable(); //SET WEL
- W25QXX_CS_L(); //使能器件
- W25QXX_SPI_ReadWriteByte(W25X_PageProgram); //发送写页命令
- W25QXX_SPI_ReadWriteByte((uint8_t)((WriteAddr)>>16)); //发送24bit地址
- W25QXX_SPI_ReadWriteByte((uint8_t)((WriteAddr)>>8));
- W25QXX_SPI_ReadWriteByte((uint8_t)WriteAddr);
- for(i=0; i<NumByteToWrite; i++)W25QXX_SPI_ReadWriteByte(pBuffer<i>); //循环写数
- W25QXX_CS_H(); //取消片选
- W25QXX_Wait_Busy(); //等待写入结束
- }
- //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(uint8_t* pBuffer,uint32_t WriteAddr,uint16_t NumByteToWrite)
- {
- uint16_t pageremain;
- pageremain=256-WriteAddr%256; //单页剩余的字节数
- if(NumByteToWrite<=pageremain)pageremain=NumByteToWrite;//不大于256个字节
- while(1)
- {
- W25QXX_Write_Page(pBuffer,WriteAddr,pageremain);
- if(NumByteToWrite==pageremain)break;//写入结束了
- else //NumByteToWrite>pageremain
- {
- pBuffer+=pageremain;
- WriteAddr+=pageremain;
- NumByteToWrite-=pageremain; //减去已经写入了的字节数
- if(NumByteToWrite>256)pageremain=256; //一次可以写入256个字节
- else pageremain=NumByteToWrite; //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)
- uint8_t W25QXX_BUFFER[4096];
- void W25QXX_Write(uint8_t* pBuffer,uint32_t WriteAddr,uint16_t NumByteToWrite)
- {
- uint32_t secpos;
- uint16_t secoff;
- uint16_t secremain;
- uint16_t i;
- uint8_t * W25QXX_BUF;
- W25QXX_BUF=W25QXX_BUFFER;
- secpos=WriteAddr/4096;//扇区地址
- secoff=WriteAddr%4096;//在扇区内的偏移
- secremain=4096-secoff;//扇区剩余空间大小
- if(NumByteToWrite<=secremain)secremain=NumByteToWrite;//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(i=0; i<secremain; i++) //校验数据
- {
- if(W25QXX_BUF[secoff+i]!=0XFF)break;//需要擦除
- }
- if(i<secremain)//需要擦除
- {
- 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); //写已经擦除了的,直接写入扇区剩余区间.
- if(NumByteToWrite==secremain)break;//写入结束了
- else//写入未结束
- {
- secpos++;//扇区地址增1
- secoff=0;//偏移位置为0
- pBuffer+=secremain; //指针偏移
- WriteAddr+=secremain; //写地址偏移
- NumByteToWrite-=secremain; //字节数递减
- 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_L(); //使能器件
- W25QXX_SPI_ReadWriteByte(W25X_ChipErase); //发送片擦除命令
- W25QXX_CS_H(); //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
- //擦除一个山区的最少时间:150ms
- void W25QXX_Erase_Sector(uint32_t Dst_Addr)
- {
- //监视falsh擦除情况,测试用
- Dst_Addr*=4096;
- W25QXX_Write_Enable(); //SET WEL
- W25QXX_Wait_Busy();
- W25QXX_CS_L(); //使能器件
- W25QXX_SPI_ReadWriteByte(W25X_SectorErase); //发送扇区擦除指令
- W25QXX_SPI_ReadWriteByte((uint8_t)((Dst_Addr)>>16)); //发送24bit地址
- W25QXX_SPI_ReadWriteByte((uint8_t)((Dst_Addr)>>8));
- W25QXX_SPI_ReadWriteByte((uint8_t)Dst_Addr);
- W25QXX_CS_H(); //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()&0x01)==0x01); // 等待BUSY位清空
- }
- //进入掉电模式
- void W25QXX_PowerDown(void)
- {
- W25QXX_CS_L(); //使能器件
- W25QXX_SPI_ReadWriteByte(W25X_PowerDown); //发送掉电命令
- W25QXX_CS_H(); //取消片选
- delay_us(3); //等待TPD
- }
- //唤醒
- void W25QXX_WAKEUP(void)
- {
- W25QXX_CS_L(); //使能器件
- W25QXX_SPI_ReadWriteByte(W25X_ReleasePowerDown); // send W25X_PowerDown command 0xAB
- W25QXX_CS_H(); //取消片选
- delay_us(3); //等待TRES1
- }
- </i></i></i></i></i>
复制代码 |