318 lines
8.5 KiB
C
318 lines
8.5 KiB
C
#include <string.h>
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#include "w25q256.h"
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///@brief Flash相关引脚初始化
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void Flash_GPIO_Init(void)
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{
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FLASH_CS_DISABLE;
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FLASH_CLK_HIGH;
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FLASH_MOSI_LOW;
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}
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///@brief 读取一个字节数据
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static uint8_t Flash_ReadOneByte(void)
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{
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uint8_t retValue = 0;
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FLASH_CLK_HIGH; //时钟线拉高,恢复时钟线为高电平
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for(uint8_t i= 0; i < 8; i++)
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{
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retValue <<= 1;
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FLASH_CLK_HIGH; //时钟线拉高,恢复时钟线为高电平
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if(FLASH_MISO_READ)
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{
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retValue |= 0x01;
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}
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else
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{
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retValue &= 0xFE;
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}
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FLASH_CLK_LOW; //时钟线拉低,产生下降沿读出数据
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}
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FLASH_CLK_HIGH;
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return (retValue);
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}
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///@brief 写入一个字节
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static void Flash_WriteOneByte(uint8_t DataBuffer)
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{
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FLASH_CLK_LOW; //时钟线拉低，恢复时钟线为低电平
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for(uint8_t i = 0; i < 8; i++)
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{
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FLASH_CLK_LOW; //时钟线拉低，恢复时钟线为低电平
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if(DataBuffer & 0x80)
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{
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FLASH_MOSI_HIGH;
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}
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else
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{
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FLASH_MOSI_LOW;
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}
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DataBuffer <<= 1;
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FLASH_CLK_HIGH; //时钟线拉高，产生上升沿写入数据
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}
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FLASH_CLK_LOW;
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FLASH_MOSI_HIGH; //一字节数据传送完毕，MOSI数据线置高表示空闲状态
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}
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///@brief 写指令
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static void Flash_Write_CMD(uint8_t *pCMD)
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{
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#ifdef FLASH_W25Q256
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for(uint8_t i = 0; i < 4; i++) //new add
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{
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Flash_WriteOneByte(pCMD[i]);
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}
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#endif
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#ifdef FLASH_W25Q128
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for(uint8_t i = 0; i < 3; i++) //new add
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{
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Flash_WriteOneByte(pCMD[i]);
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}
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#endif
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}
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///@brief 读取SR
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static uint8_t Flash_ReadSR(void)
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{
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uint8_t retValue = 0;
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FLASH_CS_ENABLE;
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Flash_WriteOneByte(Flash_ReadSR_CMD);
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retValue = Flash_ReadOneByte();
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FLASH_CS_DISABLE;
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return retValue;
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}
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///@brief 等待标志位
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static void Flash_Wait_Busy(void)
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{
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uint32_t i =0;
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while(((Flash_ReadSR() & FLASH_WRITE_BUSYBIT) == 0x01) && (i<0x1ffff))
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{
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i ++;
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}
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}
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///@brief 写使能
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static void Flash_Write_Enable(void)
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{
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FLASH_CS_ENABLE;
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Flash_WriteOneByte(Flash_WriteEnable_CMD);
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FLASH_CS_DISABLE;
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}
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#if 0
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///@brief 进入4字节模式
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void Enter4ByteAddrMode(void)
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{
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FLASH_CS_ENABLE; //使能器件
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Flash_WriteOneByte(W25Q_4ByteAddrModeEnable); //进入4Byte地址模式W25Q128以上使用
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FLASH_CS_DISABLE;
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}
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///@brief 退出4字节模式
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void Exit4ByteAddrMode(void)
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{
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FLASH_CS_ENABLE; //使能器件
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Flash_WriteOneByte(W25Q_Exit4ByteAddrModeEnable); //进入4Byte地址模式W25Q128以上使用
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FLASH_CS_DISABLE;
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}
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#endif
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///@brief 擦除区域
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void Flash_Erase_Sector(uint8_t Block_Num,uint8_t Sector_Number)
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{
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uint8_t pcmd[3] = {0};
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Flash_Write_Enable();
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FLASH_CS_ENABLE;
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Flash_WriteOneByte(Flash_SecErase_CMD);
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pcmd[0] = Block_Num;
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pcmd[1] = Sector_Number<<4;
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pcmd[2] = 0;
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Flash_Write_CMD(pcmd);
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FLASH_CS_DISABLE;
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Flash_Wait_Busy();//每次擦除数据都要延时等待写入结束
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return ;
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}
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///@brief 擦除块
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void Flash_Erase_Block(uint8_t BlockNum)
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{
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uint8_t pcmd[3] = {0};
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Flash_Write_Enable(); //写使能
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FLASH_CS_ENABLE; //片选拉低
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Flash_WriteOneByte(Flash_BlockErase_CMD); //传输Block擦除指令
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pcmd[0] = BlockNum ; //传24位地址
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Flash_Write_CMD(pcmd);
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FLASH_CS_DISABLE;
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Flash_Wait_Busy(); //每次擦除数据都要延时等待写入结束
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return ;
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}
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///@brief 页写
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void Flash_Write_Page(uint8_t *pBuffer, uint32_t WriteAddr, uint32_t WriteBytesNum)
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{
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uint8_t pcmd[4] = {0};
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Flash_Write_Enable();
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FLASH_CS_ENABLE;
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Flash_WriteOneByte(Flash_PageProgram_CMD);
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#ifdef FLASH_W25Q256
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pcmd[0] = (uint8_t)((WriteAddr&0xff000000)>>24); //new add
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pcmd[1] = (uint8_t)((WriteAddr&0x00ff0000)>>16);
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pcmd[2] = (uint8_t)((WriteAddr&0x0000ff00)>>8);
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pcmd[3] = (uint8_t)WriteAddr;
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#endif
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#ifdef FLASH_W25Q128
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pcmd[0] = (uint8_t)((WriteAddr&0x00ff0000)>>16);
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pcmd[1] = (uint8_t)((WriteAddr&0x0000ff00)>>8);
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pcmd[2] = (uint8_t)WriteAddr;
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#endif
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Flash_Write_CMD(pcmd);
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for(uint32_t i = 0;i < WriteBytesNum; i++)
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{
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Flash_WriteOneByte(pBuffer[i]); //向Flash中写入最大一页256bytes字节数据
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}
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FLASH_CS_DISABLE;
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Flash_Wait_Busy(); //每次写入一定数量的数据都要延时等待写入结束
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return;
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}
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///@brief 连续写入多页
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void Flash_Write_MorePage(uint8_t *pBuffer, uint32_t WriteAddr, uint32_t WriteBytesNum)
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{
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uint16_t PageByteRemain = 0;
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PageByteRemain = Flash_PAGEBYTE_LENGTH - WriteAddr%Flash_PAGEBYTE_LENGTH;
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if(WriteBytesNum <= PageByteRemain)
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{
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PageByteRemain = WriteBytesNum;
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}
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while(1)
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{
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Flash_Write_Page(pBuffer,WriteAddr,PageByteRemain);
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if(WriteBytesNum == PageByteRemain)
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{
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break;
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}
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else
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{
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pBuffer += PageByteRemain;
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WriteAddr += PageByteRemain;
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WriteBytesNum -= PageByteRemain;
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if(WriteBytesNum > Flash_PAGEBYTE_LENGTH)
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{
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PageByteRemain = Flash_PAGEBYTE_LENGTH;
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}
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else
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{
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PageByteRemain = WriteBytesNum;
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}
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}
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}
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return;
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}
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///@brief 连续写入多页
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uint8_t W25QXX_BUFFER[4096];
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void W25Q128_Write(uint8_t *pBuffer, uint32_t WriteAddr, uint32_t WriteBytesNum)
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{
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// volatile static int timeReadTemp1, timeReadTemp2, timeReadTemp3, timeReadTemp4, timeReadTemp5, timeReadTemp6;
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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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if (WriteBytesNum <= secremain)
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secremain = WriteBytesNum; //不大于4096个字节
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while (1)
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{
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// timeReadTemp1 = HAL_GetTick();
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Flash_Read(W25QXX_BUF, secpos * 4096, 4096); //读出整个扇区的内容
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// timeReadTemp2 = HAL_GetTick();
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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)
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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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Flash_Erase_Block(secpos); //擦除这个扇区
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// timeReadTemp3 = HAL_GetTick();
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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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Flash_Write_Page(W25QXX_BUF, secpos * 4096, 4096); //写入整个扇区
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// timeReadTemp4 = HAL_GetTick();
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// timeReadTemp5 = NumByteToWrite;
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// timeReadTemp6 = WriteAddr;
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}
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else
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Flash_Write_Page(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 (WriteBytesNum == secremain)
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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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WriteBytesNum -= secremain; //字节数递减
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if (WriteBytesNum > 4096)
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secremain = 4096; //下一个扇区还是写不完
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else
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secremain = WriteBytesNum; //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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///@brief 读取数据
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void Flash_Read(uint8_t *pBuffer,uint32_t ReadAddr,uint32_t ReadBytesNum)
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{
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uint8_t pcmd[4] = {0};
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FLASH_CS_ENABLE; //打开spiflash片选
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Flash_WriteOneByte(Flash_ReadData_CMD);
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#ifdef FLASH_W25Q256
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pcmd[0] = (uint8_t)((ReadAddr&0xff000000)>>24); //new add
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pcmd[1] = (uint8_t)((ReadAddr&0x00ff0000)>>16);
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pcmd[2] = (uint8_t)((ReadAddr&0x0000ff00)>>8);
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pcmd[3] = (uint8_t)ReadAddr;
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#endif
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#ifdef FLASH_W25Q128
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pcmd[0] = (uint8_t)((ReadAddr&0x00ff0000)>>16);
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pcmd[1] = (uint8_t)((ReadAddr&0x0000ff00)>>8);
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pcmd[2] = (uint8_t)ReadAddr;
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#endif
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Flash_Write_CMD(pcmd);
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for(uint32_t i = 0;i < ReadBytesNum; i++)
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{
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pBuffer[i] = Flash_ReadOneByte(); //读取SPIflash中指定bytes字节数据
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}
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FLASH_CS_DISABLE;
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return ;
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} |