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336 lines
12 KiB
336 lines
12 KiB
#include "w25qxx.h"
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#ifdef USE_W25QXX
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#include "spi.h"
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//////////////////////////////////////////////////////////////////////////////////
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//本程序只供学习使用，未经作者许可，不得用于其它任何用途
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//ALIENTEK STM32F429开发板
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//W25QXX驱动代码
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//正点原子@ALIENTEK
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//技术论坛:www.openedv.com
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//创建日期:2016/1/16
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//版本：V1.0
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//版权所有，盗版必究。
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//Copyright(C) 广州市星翼电子科技有限公司 2014-2024
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//All rights reserved
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//////////////////////////////////////////////////////////////////////////////////
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uint16_t W25QXX_TYPE=W25Q80; //默认是W25Q80
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//4Kbytes为一个Sector
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//16个扇区为1个Block
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//W25Q80
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//容量为1M字节,共有16个Block,256个Sector
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uint8_t SPI2_ReadWriteByte(uint8_t TxData)
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{
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uint8_t Rxdata;
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HAL_SPI_TransmitReceive(&W25QXXSPI,&TxData,&Rxdata,1, 1000);
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return Rxdata; //返回收到的数据
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}
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//初始化SPI FLASH的IO口
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void W25QXX_Init(void)
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{
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uint8_t temp;
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SPI2_ReadWriteByte(0Xff); //启动传输
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W25QXX_CS(1); //SPI FLASH不选中
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W25QXX_TYPE=W25QXX_ReadID(); //读取FLASH ID
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if(W25QXX_TYPE==W25Q256)
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{
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temp=W25QXX_ReadSR(3); //读取状态寄存器3，判断地址模式
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if((temp&0X01)==0) //如果不是4字节地址模式,则进入4字节地址模式
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{
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W25QXX_CS(0); //选中
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SPI2_ReadWriteByte(W25X_Enable4ByteAddr);//发送进入4字节地址模式指令
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W25QXX_CS(1); //取消片选
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}
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}
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}
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//读取W25QXX的状态寄存器，W25QXX一共有3个状态寄存器
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//状态寄存器1：
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//BIT7 6 5 4 3 2 1 0
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//SPR RV TB BP2 BP1 BP0 WEL BUSY
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//SPR:默认0,状态寄存器保护位,配合WP使用
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//TB,BP2,BP1,BP0:FLASH区域写保护设置
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//WEL:写使能锁定
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//BUSY:忙标记位(1,忙;0,空闲)
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//默认:0x00
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//状态寄存器2：
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//BIT7 6 5 4 3 2 1 0
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//SUS CMP LB3 LB2 LB1 (R) QE SRP1
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//状态寄存器3：
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//BIT7 6 5 4 3 2 1 0
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//HOLD/RST DRV1 DRV0 (R) (R) WPS ADP ADS
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//regno:状态寄存器号，范:1~3
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//返回值:状态寄存器值
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uint8_t W25QXX_ReadSR(uint8_t regno)
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{
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uint8_t byte=0,command=0;
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switch(regno)
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{
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case 1:
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command=W25X_ReadStatusReg1; //读状态寄存器1指令
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break;
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case 2:
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command=W25X_ReadStatusReg2; //读状态寄存器2指令
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break;
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case 3:
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command=W25X_ReadStatusReg3; //读状态寄存器3指令
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break;
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default:
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command=W25X_ReadStatusReg1;
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break;
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}
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W25QXX_CS(0); //使能器件
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SPI2_ReadWriteByte(command); //发送读取状态寄存器命令
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byte=SPI2_ReadWriteByte(0Xff); //读取一个字节
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W25QXX_CS(1); //取消片选
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return byte;
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}
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//写W25QXX状态寄存器
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void W25QXX_Write_SR(uint8_t regno,uint8_t sr)
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{
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uint8_t command=0;
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switch(regno)
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{
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case 1:
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command=W25X_WriteStatusReg1; //写状态寄存器1指令
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break;
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case 2:
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command=W25X_WriteStatusReg2; //写状态寄存器2指令
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break;
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case 3:
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command=W25X_WriteStatusReg3; //写状态寄存器3指令
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break;
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default:
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command=W25X_WriteStatusReg1;
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break;
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}
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W25QXX_CS(0); //使能器件
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SPI2_ReadWriteByte(command); //发送写取状态寄存器命令
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SPI2_ReadWriteByte(sr); //写入一个字节
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W25QXX_CS(1); //取消片选
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}
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//W25QXX写使能
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//将WEL置位
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void W25QXX_Write_Enable(void)
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{
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W25QXX_CS(0); //使能器件
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SPI2_ReadWriteByte(W25X_WriteEnable); //发送写使能
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W25QXX_CS(1); //取消片选
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}
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//W25QXX写禁止
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//将WEL清零
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void W25QXX_Write_Disable(void)
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{
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W25QXX_CS(0); //使能器件
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SPI2_ReadWriteByte(W25X_WriteDisable); //发送写禁止指令
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W25QXX_CS(1); //取消片选
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}
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//读取芯片ID
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//返回值如下:
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//0XEF13,表示芯片型号为W25Q80
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//0XEF14,表示芯片型号为W25Q16
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//0XEF15,表示芯片型号为W25Q32
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//0XEF16,表示芯片型号为W25Q64
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//0XEF17,表示芯片型号为W25Q128
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//0XEF18,表示芯片型号为W25Q256
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uint16_t W25QXX_ReadID(void)
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{
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uint16_t Temp = 0;
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W25QXX_CS(0);
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SPI2_ReadWriteByte(0x90);//发送读取ID命令
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SPI2_ReadWriteByte(0x00);
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SPI2_ReadWriteByte(0x00);
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SPI2_ReadWriteByte(0x00);
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Temp|=SPI2_ReadWriteByte(0xFF)<<8;
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Temp|=SPI2_ReadWriteByte(0xFF);
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W25QXX_CS(1);
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return Temp;
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}
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//读取SPI FLASH
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//在指定地址开始读取指定长度的数据
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//pBuffer:数据存储区
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//ReadAddr:开始读取的地址(24bit)
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//NumByteToRead:要读取的字节数(最大65535)
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void W25QXX_Read(uint8_t* pBuffer,uint32_t ReadAddr,uint16_t NumByteToRead)
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{
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uint16_t i;
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W25QXX_CS(0); //使能器件
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SPI2_ReadWriteByte(W25X_ReadData); //发送读取命令
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if(W25QXX_TYPE==W25Q256) //如果是W25Q256的话地址为4字节的，要发送最高8位
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{
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SPI2_ReadWriteByte((uint8_t)((ReadAddr)>>24));
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}
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SPI2_ReadWriteByte((uint8_t)((ReadAddr)>>16)); //发送24bit地址
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SPI2_ReadWriteByte((uint8_t)((ReadAddr)>>8));
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SPI2_ReadWriteByte((uint8_t)ReadAddr);
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for(i=0;i<NumByteToRead;i++)
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{
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pBuffer[i]=SPI2_ReadWriteByte(0XFF); //循环读数
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}
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W25QXX_CS(1);
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}
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//SPI在一页(0~65535)内写入少于256个字节的数据
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//在指定地址开始写入最大256字节的数据
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//pBuffer:数据存储区
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//WriteAddr:开始写入的地址(24bit)
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//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!!!
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void W25QXX_Write_Page(uint8_t* pBuffer,uint32_t WriteAddr,uint16_t NumByteToWrite)
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{
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uint16_t i;
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W25QXX_Write_Enable(); //SET WEL
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W25QXX_CS(0); //使能器件
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SPI2_ReadWriteByte(W25X_PageProgram); //发送写页命令
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if(W25QXX_TYPE==W25Q256) //如果是W25Q256的话地址为4字节的，要发送最高8位
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{
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SPI2_ReadWriteByte((uint8_t)((WriteAddr)>>24));
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}
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SPI2_ReadWriteByte((uint8_t)((WriteAddr)>>16)); //发送24bit地址
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SPI2_ReadWriteByte((uint8_t)((WriteAddr)>>8));
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SPI2_ReadWriteByte((uint8_t)WriteAddr);
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for(i=0;i<NumByteToWrite;i++)SPI2_ReadWriteByte(pBuffer[i]);//循环写数
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W25QXX_CS(1); //取消片选
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W25QXX_Wait_Busy(); //等待写入结束
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}
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//无检验写SPI FLASH
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//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!
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//具有自动换页功能
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//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!
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//pBuffer:数据存储区
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//WriteAddr:开始写入的地址(24bit)
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//NumByteToWrite:要写入的字节数(最大65535)
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//CHECK OK
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void W25QXX_Write_NoCheck(uint8_t* pBuffer,uint32_t WriteAddr,uint16_t NumByteToWrite)
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{
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uint16_t pageremain;
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pageremain=256-WriteAddr%256; //单页剩余的字节数
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if(NumByteToWrite<=pageremain)pageremain=NumByteToWrite;//不大于256个字节
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while(1)
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{
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W25QXX_Write_Page(pBuffer,WriteAddr,pageremain);
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if(NumByteToWrite==pageremain)break;//写入结束了
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else //NumByteToWrite>pageremain
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{
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pBuffer+=pageremain;
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WriteAddr+=pageremain;
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NumByteToWrite-=pageremain; //减去已经写入了的字节数
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if(NumByteToWrite>256)pageremain=256; //一次可以写入256个字节
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else pageremain=NumByteToWrite; //不够256个字节了
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}
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};
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}
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//写SPI FLASH
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//在指定地址开始写入指定长度的数据
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//该函数带擦除操作!
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//pBuffer:数据存储区
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//WriteAddr:开始写入的地址(24bit)
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//NumByteToWrite:要写入的字节数(最大65535)
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uint8_t W25QXX_BUFFER[4096];
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void W25QXX_Write(uint8_t* pBuffer,uint32_t WriteAddr,uint16_t NumByteToWrite)
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{
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uint32_t secpos;
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uint16_t secoff;
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uint16_t secremain;
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uint16_t i;
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uint8_t * W25QXX_BUF;
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W25QXX_BUF=W25QXX_BUFFER;
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secpos=WriteAddr/4096;//扇区地址
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secoff=WriteAddr%4096;//在扇区内的偏移
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secremain=4096-secoff;//扇区剩余空间大小
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//printf("ad:%X,nb:%X\r\n",WriteAddr,NumByteToWrite);//测试用
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if(NumByteToWrite<=secremain)secremain=NumByteToWrite;//不大于4096个字节
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while(1)
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{
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W25QXX_Read(W25QXX_BUF,secpos*4096,4096);//读出整个扇区的内容
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for(i=0;i<secremain;i++)//校验数据
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{
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if(W25QXX_BUF[secoff+i]!=0XFF)break;//需要擦除
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}
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if(i<secremain)//需要擦除
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{
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W25QXX_Erase_Sector(secpos);//擦除这个扇区
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for(i=0;i<secremain;i++) //复制
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{
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W25QXX_BUF[i+secoff]=pBuffer[i];
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}
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W25QXX_Write_NoCheck(W25QXX_BUF,secpos*4096,4096);//写入整个扇区
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}else W25QXX_Write_NoCheck(pBuffer,WriteAddr,secremain);//写已经擦除了的,直接写入扇区剩余区间.
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if(NumByteToWrite==secremain)break;//写入结束了
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else//写入未结束
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{
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secpos++;//扇区地址增1
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secoff=0;//偏移位置为0
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pBuffer+=secremain; //指针偏移
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WriteAddr+=secremain;//写地址偏移
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NumByteToWrite-=secremain; //字节数递减
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if(NumByteToWrite>4096)secremain=4096; //下一个扇区还是写不完
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else secremain=NumByteToWrite; //下一个扇区可以写完了
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}
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};
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}
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//擦除整个芯片
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//等待时间超长...
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void W25QXX_Erase_Chip(void)
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{
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W25QXX_Write_Enable(); //SET WEL
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W25QXX_Wait_Busy();
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W25QXX_CS(0); //使能器件
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SPI2_ReadWriteByte(W25X_ChipErase); //发送片擦除命令
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W25QXX_CS(1); //取消片选
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W25QXX_Wait_Busy(); //等待芯片擦除结束
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}
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//擦除一个扇区
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//Dst_Addr:扇区地址 根据实际容量设置
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//擦除一个扇区的最少时间:150ms
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void W25QXX_Erase_Sector(uint32_t Dst_Addr)
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{
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//监视falsh擦除情况,测试用
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//printf("fe:%x\r\n",Dst_Addr);
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Dst_Addr*=4096;
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W25QXX_Write_Enable(); //SET WEL
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W25QXX_Wait_Busy();
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W25QXX_CS(0); //使能器件
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SPI2_ReadWriteByte(W25X_SectorErase); //发送扇区擦除指令
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if(W25QXX_TYPE==W25Q256) //如果是W25Q256的话地址为4字节的，要发送最高8位
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{
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SPI2_ReadWriteByte((uint8_t)((Dst_Addr)>>24));
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}
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SPI2_ReadWriteByte((uint8_t)((Dst_Addr)>>16)); //发送24bit地址
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SPI2_ReadWriteByte((uint8_t)((Dst_Addr)>>8));
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SPI2_ReadWriteByte((uint8_t)Dst_Addr);
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W25QXX_CS(1); //取消片选
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W25QXX_Wait_Busy(); //等待擦除完成
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}
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//等待空闲
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void W25QXX_Wait_Busy(void)
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{
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while((W25QXX_ReadSR(1)&0x01)==0x01); // 等待BUSY位清空
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}
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//进入掉电模式
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void W25QXX_PowerDown(void)
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{
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W25QXX_CS(0); //使能器件
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SPI2_ReadWriteByte(W25X_PowerDown); //发送掉电命令
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W25QXX_CS(1); //取消片选
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HAL_Delay(3); //等待TPD
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}
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//唤醒
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void W25QXX_WAKEUP(void)
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{
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W25QXX_CS(0); //使能器件
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SPI2_ReadWriteByte(W25X_ReleasePowerDown); // send W25X_PowerDown command 0xAB
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W25QXX_CS(1); //取消片选
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HAL_Delay(3); //等待TRES1
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}
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#endif
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