在头文件中简单修改一下片选引脚IO即可使用。
源文件
/**
* @file w25qxx.c
*
* @brief Create by AnKun on 2020/6/18
*
*/
#include "w25qxx.h"
#include "spi.h"
uint16_t W25QXX_TYPE = 0;
uint32_t W25QXX_SIZE = 0;
uint8_t W25QXX_UID[8];
static void delay_us(uint32_t us)
{
uint32_t delay = (HAL_RCC_GetHCLKFreq() / 4000000 * us);
while (delay--)
{
;
}
}
//SPI读写一个字节
//TxData:要写入的字节
//返回值:读取到的字节
static uint8_t W25QXX_SPI_ReadWriteByte(uint8_t TxData)
{
uint8_t RxData = 0X00;
if(HAL_SPI_TransmitReceive(W25QXX_SPI_Handle, &TxData, &RxData, 1, 10) != HAL_OK)
{
RxData = 0XFF;
}
return RxData;
}
//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
int W25QXX_Init(void)
{
MX_SPI1_Init();
W25QXX_CS_L(); /* 拉低选中 */
W25QXX_SPI_ReadWriteByte(0XFF);
W25QXX_CS_H(); /* 拉高取消 */
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
if((W25QXX_TYPE & 0XEF00) != 0XEF00)
{
return -1;
}
return 0;
}
//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;
}
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 = 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 = W25QXX_SPI_ReadWriteByte(0xFF);
}
W25QXX_CS_H();
}
//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 = 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); //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;
}
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
}
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