369 lines
11 KiB
C
369 lines
11 KiB
C
#include "stm32f4xx.h"
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#include "flash.h"
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#include "mymem.h"
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#include "base.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战舰STM32开发板
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//W25Q64 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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//修改日期:2012/9/9
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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 2009-2019
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//All rights reserved
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//////////////////////////////////////////////////////////////////////////////////
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static u16 SPI_FLASH_Type=W25Q64;//默认就是25Q64
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#define W25Q_MOSI PAout(4)
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#define W25Q_CLK PAout(5)
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#define W25Q_MISO PAin(7)
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#define W25Q_CS PCout(3)
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void delay_us(u32 us)
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{
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// us=us*5;
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// while (us--);
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}
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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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//W25X16
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//容量为2M字节,共有32个Block,512个Sector
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//初始化SPI FLASH的IO口
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void SPI_Flash_Init(void)
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{
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GPIO_InitTypeDef GPIO_InitStructure; //定义结构体
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RCC_AHB1PeriphClockCmd ( RCC_AHB1Periph_GPIOA, ENABLE); //初始化GPIOG时钟
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RCC_AHB1PeriphClockCmd ( RCC_AHB1Periph_GPIOC, ENABLE); //初始化GPIOD时钟
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT; //输出模式
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GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; //推挽输出
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GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP; //上拉
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GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz; //速度选择
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//初始化 LED1 引脚
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4|GPIO_Pin_5;
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GPIO_Init(GPIOA, &GPIO_InitStructure);
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3;
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GPIO_Init(GPIOC, &GPIO_InitStructure);
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN; //输出模式
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GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; //推挽输出
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GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP; //上拉
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GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz; //速度选择
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//初始化 LED1 引脚
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7;
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GPIO_Init(GPIOA, &GPIO_InitStructure);
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SPI_FLASH_Type=SPI_Flash_ReadID();//读取FLASH ID.
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}
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u8 W25Q_ReadWriteByte(u8 da)
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{
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u8 i=0;
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u8 ret=0;
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for (i=0;i<8;i++)
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{
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W25Q_CLK=0;
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delay_us(5);
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if (da&0x80)
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W25Q_MOSI=1;
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else
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W25Q_MOSI=0;
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da<<=1;
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delay_us(5);
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W25Q_CLK=1;
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delay_us(5);
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ret<<=1;
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ret|=W25Q_MISO;
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delay_us(5);
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}
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return ret;
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}
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//读取SPI_FLASH的状态寄存器
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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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u8 SPI_Flash_ReadSR(void)
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{
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u8 byte=0;
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W25Q_CS=0; //使能器件
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W25Q_ReadWriteByte(W25X_ReadStatusReg); //发送读取状态寄存器命令
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byte=W25Q_ReadWriteByte(0Xff); //读取一个字节
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W25Q_CS=1; //取消片选
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return byte;
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}
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//写SPI_FLASH状态寄存器
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//只有SPR,TB,BP2,BP1,BP0(bit 7,5,4,3,2)可以写!!!
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void SPI_FLASH_Write_SR(u8 sr)
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{
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W25Q_CS=0; //使能器件
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W25Q_ReadWriteByte(W25X_WriteStatusReg); //发送写取状态寄存器命令
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W25Q_ReadWriteByte(sr); //写入一个字节
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W25Q_CS=1; //取消片选
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}
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//SPI_FLASH写使能
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//将WEL置位
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void SPI_FLASH_Write_Enable(void)
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{
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W25Q_CS=0; //使能器件
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W25Q_ReadWriteByte(W25X_WriteEnable); //发送写使能
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W25Q_CS=1; //取消片选
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}
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//SPI_FLASH写禁止
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//将WEL清零
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void SPI_FLASH_Write_Disable(void)
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{
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W25Q_CS=0; //使能器件
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W25Q_ReadWriteByte(W25X_WriteDisable); //发送写禁止指令
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W25Q_CS=1; //取消片选
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}
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//读取芯片ID W25X16的ID:0XEF14
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u16 SPI_Flash_ReadID(void)
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{
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u16 Temp = 0;
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W25Q_CS=0;
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W25Q_ReadWriteByte(0x90);//发送读取ID命令
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W25Q_ReadWriteByte(0x00);
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W25Q_ReadWriteByte(0x00);
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W25Q_ReadWriteByte(0x00);
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Temp|=W25Q_ReadWriteByte(0xFF)<<8;
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Temp|=W25Q_ReadWriteByte(0xFF);
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W25Q_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 SPI_Flash_Read(u8* pBuffer,u32 ReadAddr,u32 NumByteToRead)
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{
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u16 i;
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W25Q_CS=0; //使能器件
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W25Q_ReadWriteByte(W25X_ReadData); //发送读取命令
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W25Q_ReadWriteByte((u8)((ReadAddr)>>16)); //发送24bit地址
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W25Q_ReadWriteByte((u8)((ReadAddr)>>8));
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W25Q_ReadWriteByte((u8)ReadAddr);
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for(i=0;i<NumByteToRead;i++)
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{
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pBuffer[i]=W25Q_ReadWriteByte(0XFF); //循环读数
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}
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W25Q_CS=1; //取消片选
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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 SPI_Flash_Write_Page(u8* pBuffer,u32 WriteAddr,u16 NumByteToWrite)
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{
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u16 i;
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SPI_FLASH_Write_Enable(); //SET WEL
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W25Q_CS=0; //使能器件
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W25Q_ReadWriteByte(W25X_PageProgram); //发送写页命令
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W25Q_ReadWriteByte((u8)((WriteAddr)>>16)); //发送24bit地址
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W25Q_ReadWriteByte((u8)((WriteAddr)>>8));
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W25Q_ReadWriteByte((u8)WriteAddr);
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for(i=0;i<NumByteToWrite;i++)W25Q_ReadWriteByte(pBuffer[i]);//循环写数
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W25Q_CS=1; //取消片选
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SPI_Flash_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 SPI_Flash_Write_NoCheck(u8* pBuffer,u32 WriteAddr,u32 NumByteToWrite)
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{
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u16 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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SPI_Flash_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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//u8 SPI_FLASH_BUF[4096];
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void SPI_Flash_Write(u8* pBuffer,u32 WriteAddr,u32 NumByteToWrite)
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{
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u32 secpos;
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u16 secoff;
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u16 secremain;
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u16 i;
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u8 *SPI_FLASH_BUF=mymalloc(4096);
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if (SPI_FLASH_BUF==0)
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{
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return;
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}
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mymemset(SPI_FLASH_BUF,0xaa,4096);
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secpos=WriteAddr/4096;//扇区地址 0~511 for w25x16
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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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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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SPI_Flash_Read(SPI_FLASH_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(SPI_FLASH_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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SPI_Flash_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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SPI_FLASH_BUF[i+secoff]=pBuffer[i];
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}
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SPI_Flash_Write_NoCheck(SPI_FLASH_BUF,secpos*4096,4096);//写入整个扇区
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}else SPI_Flash_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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myfree(SPI_FLASH_BUF);
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}
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//擦除整个芯片
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//整片擦除时间:
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//W25X16:25s
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//W25X32:40s
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//W25X64:40s
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//等待时间超长...
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void SPI_Flash_Erase_Chip(void)
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{
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SPI_FLASH_Write_Enable(); //SET WEL
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SPI_Flash_Wait_Busy();
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W25Q_CS=0; //使能器件
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W25Q_ReadWriteByte(W25X_ChipErase); //发送片擦除命令
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W25Q_CS=1; //取消片选
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SPI_Flash_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 0~511 for w25x16
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//擦除一个山区的最少时间:150ms
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void SPI_Flash_Erase_Sector(u32 Dst_Addr)
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{
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//Dst_Addr*=4096;
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SPI_FLASH_Write_Enable(); //SET WEL
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SPI_Flash_Wait_Busy();
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W25Q_CS=0; //使能器件
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W25Q_ReadWriteByte(W25X_SectorErase); //发送扇区擦除指令
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W25Q_ReadWriteByte((u8)((Dst_Addr)>>16)); //发送24bit地址
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W25Q_ReadWriteByte((u8)((Dst_Addr)>>8));
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W25Q_ReadWriteByte((u8)Dst_Addr);
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W25Q_CS=1; //取消片选
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SPI_Flash_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 SPI_Flash_Wait_Busy(void)
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{
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while ((SPI_Flash_ReadSR()&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 SPI_Flash_PowerDown(void)
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{
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W25Q_CS=0; //使能器件
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W25Q_ReadWriteByte(W25X_PowerDown); //发送掉电命令
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W25Q_CS=1; //取消片选
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delay_us(3); //等待TPD
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}
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//唤醒
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void SPI_Flash_WAKEUP(void)
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{
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W25Q_CS=0; //使能器件
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W25Q_ReadWriteByte(W25X_ReleasePowerDown); // send W25X_PowerDown command 0xAB
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W25Q_CS=1; //取消片选
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delay_us(3); //等待TRES1
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}
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u16 SPI_Flash_GetType (void)
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{
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return SPI_FLASH_Type;
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}
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