stm32F103vgt6 SPI2读写flash w25Q128 都不出数据-jorry的回答

13条回答

2019-07-21 19:46

u16 SPI_FLASH_TYPE=W25Q128;//Ä¬èÏ¾íêÇ25Q128

//4KbytesÎaò»¸öSector
//16¸öéèÇøÎa1¸öBlock
//W25X16
//èYá¿Îa2M×Ö½ú,12óD32¸öBlock,512¸öSector

//3õê¼»ˉSPI FLASHμÄIO¿ú
void SPI_Flash_Init(void)
{
  GPIO_InitTypeDef GPIO_InitStructure;
RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOB, ENABLE );//PORTBê±Öóê1Äü

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;  //íÆíìêä3ö
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOB, &GPIO_InitStructure);
GPIO_SetBits(GPIOB,GPIO_Pin_5);  //ÖÃ¸ß1©μçflash

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;  // PB12 íÆíì
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;  //íÆíìêä3ö
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOB, &GPIO_InitStructure);

GPIO_SetBits(GPIOB,GPIO_Pin_12);  //spi flash 2»Ñ¡ÖD

SPI2_Init();    //3õê¼»ˉSPI
SPI2_SetSpeed(SPI_BaudRatePrescaler_2);//éèÖÃÎa18Mê±Öó,¸ßËùÄ￡ê½
SPI_FLASH_TYPE=SPI_Flash_ReadID();//¶áè¡FLASH ID.

}

//¶áè¡SPI_FLASHμÄ×′ì¬¼Ä′æÆ÷
//BIT7  6 5 4 3 2 1 0
//SPR RV  TB BP2 BP1 BP0 WEL BUSY
//SPR:Ä¬èÏ0,×′ì¬¼Ä′æÆ÷±￡»¤Î»,ÅäoÏWPê1óÃ
//TB,BP2,BP1,BP0:FLASHÇøóòD′±￡»¤éèÖÃ
//WEL

′ê1ÄüËø¶¨
//BUSY:Ã|±ê¼ÇÎ»(1,Ã|;0,¿ÕÏD)
//Ä¬èÏ:0x00
u8 SPI_Flash_ReadSR(void)
{
u8 byte=0;
SPI_FLASH_CS=0;                         //ê1ÄüÆ÷¼t
SPI2_ReadWriteByte(W25X_ReadStatusReg); //·￠Ëí¶áè¡×′ì¬¼Ä′æÆ÷Ãüáî
byte=SPI2_ReadWriteByte(0Xff);          //¶áè¡ò»¸ö×Ö½ú
SPI_FLASH_CS=1;                         //è¡ÏûÆ¬Ñ¡
return byte;
}
//D′SPI_FLASH×′ì¬¼Ä′æÆ÷
//Ö»óDSPR,TB,BP2,BP1,BP0(bit 7,5,4,3,2)¿éòÔD′!!!
void SPI_FLASH_Write_SR(u8 sr)
{
SPI_FLASH_CS=0;                         //ê1ÄüÆ÷¼t
SPI2_ReadWriteByte(W25X_WriteStatusReg); //·￠ËíD′è¡×′ì¬¼Ä′æÆ÷Ãüáî
SPI2_ReadWriteByte(sr);             //D′èëò»¸ö×Ö½ú
SPI_FLASH_CS=1;                         //è¡ÏûÆ¬Ñ¡
}
//SPI_FLASHD′ê1Äü
//½«WELÖÃÎ»
void SPI_FLASH_Write_Enable(void)
{
SPI_FLASH_CS=0;                         //ê1ÄüÆ÷¼t
SPI2_ReadWriteByte(W25X_WriteEnable);    //·￠ËíD′ê1Äü
SPI_FLASH_CS=1;                         //è¡ÏûÆ¬Ñ¡
}
//SPI_FLASHD′½ûÖ1
//½«WELÇåáã
void SPI_FLASH_Write_Disable(void)
{
SPI_FLASH_CS=0;                         //ê1ÄüÆ÷¼t
SPI2_ReadWriteByte(W25X_WriteDisable);    //·￠ËíD′½ûÖ1Ö¸áî
SPI_FLASH_CS=1;                         //è¡ÏûÆ¬Ñ¡
}
//¶áè¡D¾Æ¬ID W25X16μÄID:0XEF14
u16 SPI_Flash_ReadID(void)
{
u16 Temp = 0;
SPI_FLASH_CS=0;
SPI2_ReadWriteByte(0x90);//·￠Ëí¶áè¡IDÃüáî
SPI2_ReadWriteByte(0x00);
SPI2_ReadWriteByte(0x00);
SPI2_ReadWriteByte(0x00);
Temp|=SPI2_ReadWriteByte(0xFF)<<8;
Temp|=SPI2_ReadWriteByte(0xFF);
SPI_FLASH_CS=1;
return Temp;
}
//¶áè¡SPI FLASH
//ÔúÖ¸¶¨μØÖ·¿aê¼¶áè¡Ö¸¶¨3¤¶èμÄêy¾Y
//pBuffer:êy¾Y′æ′￠Çø
//ReadAddr:¿aê¼¶áè¡μÄμØÖ·(24bit)
//NumByteToRead:òa¶áè¡μÄ×Ö½úêy(×î′ó65535)
void SPI_Flash_Read(u8* pBuffer,u32 ReadAddr,u16 NumByteToRead)
{
u16 i;
SPI_FLASH_CS=0;                         //ê1ÄüÆ÷¼t
SPI2_ReadWriteByte(W25X_ReadData);       //·￠Ëí¶áè¡Ãüáî
SPI2_ReadWriteByte((u8)((ReadAddr)>>16));  //·￠Ëí24bitμØÖ·
SPI2_ReadWriteByte((u8)((ReadAddr)>>8));
SPI2_ReadWriteByte((u8)ReadAddr);
for(i=0;i<NumByteToRead;i++)
{
      pBuffer[i]=SPI2_ReadWriteByte(0XFF); //Ñ-»·¶áêy

}
   SPI_FLASH_CS=1;                         //è¡ÏûÆ¬Ñ¡
}
//SPIÔúò»ò3(0~65535)ÄúD′èëéùóú256¸ö×Ö½úμÄêy¾Y
//ÔúÖ¸¶¨μØÖ·¿aê¼D′èë×î′ó256×Ö½úμÄêy¾Y
//pBuffer:êy¾Y′æ′￠Çø
//WriteAddr:¿aê¼D′èëμÄμØÖ·(24bit)
//NumByteToWrite:òaD′èëμÄ×Ö½úêy(×î′ó256),¸Ãêy2»ó|¸Ã3¬1y¸Ãò3μÄê￡óà×Ö½úêy!!!
void SPI_Flash_Write_Page(u8* pBuffer,u32 WriteAddr,u16 NumByteToWrite)
{
u16 i;
SPI_FLASH_Write_Enable();                //SET WEL
SPI_FLASH_CS=0;                         //ê1ÄüÆ÷¼t
SPI2_ReadWriteByte(W25X_PageProgram);    //·￠ËíD′ò3Ãüáî
SPI2_ReadWriteByte((u8)((WriteAddr)>>16)); //·￠Ëí24bitμØÖ·
SPI2_ReadWriteByte((u8)((WriteAddr)>>8));
SPI2_ReadWriteByte((u8)WriteAddr);
for(i=0;i<NumByteToWrite;i++)SPI2_ReadWriteByte(pBuffer[i]);//Ñ-»·D′êy
SPI_FLASH_CS=1;                         //è¡ÏûÆ¬Ñ¡
SPI_Flash_Wait_Busy();    //μè′yD′èë½áêø
}
//ÎT¼ìÑéD′SPI FLASH
//±ØDëè·±￡ËùD′μÄμØÖ··¶Î§ÄúμÄêy¾Yè«2¿Îa0XFF,·ñÔòÔú·Ç0XFF′|D′èëμÄêy¾Y½«ê§°ü!
//¾ßóD×Ô¶ˉ»»ò31|Äü
//ÔúÖ¸¶¨μØÖ·¿aê¼D′èëÖ¸¶¨3¤¶èμÄêy¾Y,μ«êÇòaè·±￡μØÖ·2»Ô½½ç!
//pBuffer:êy¾Y′æ′￠Çø
//WriteAddr:¿aê¼D′èëμÄμØÖ·(24bit)
//NumByteToWrite:òaD′èëμÄ×Ö½úêy(×î′ó65535)
//CHECK OK
void SPI_Flash_Write_NoCheck(u8* pBuffer,u32 WriteAddr,u16 NumByteToWrite)
{
u16 pageremain;
pageremain=256-WriteAddr%256; //μ￥ò3ê￡óàμÄ×Ö½úêy
if(NumByteToWrite<=pageremain)pageremain=NumByteToWrite;//2»′óóú256¸ö×Ö½ú
while(1)
{
SPI_Flash_Write_Page(pBuffer,WriteAddr,pageremain);
if(NumByteToWrite==pageremain)break;//D′èë½áêøáË
     else //NumByteToWrite>pageremain
{
pBuffer+=pageremain;
WriteAddr+=pageremain;

NumByteToWrite-=pageremain;    //¼õè￥òÑ¾-D′èëáËμÄ×Ö½úêy
if(NumByteToWrite>256)pageremain=256; //ò»′Î¿éòÔD′èë256¸ö×Ö½ú
else pageremain=NumByteToWrite;    //2»1»256¸ö×Ö½úáË
}
};
}
//D′SPI FLASH
//ÔúÖ¸¶¨μØÖ·¿aê¼D′èëÖ¸¶¨3¤¶èμÄêy¾Y
//¸Ãoˉêy′ø2á3y2ù×÷!
//pBuffer:êy¾Y′æ′￠Çø
//WriteAddr:¿aê¼D′èëμÄμØÖ·(24bit)
//NumByteToWrite:òaD′èëμÄ×Ö½úêy(×î′ó65535)
u8 SPI_FLASH_BUF[4096];
void SPI_Flash_Write(u8* pBuffer,u32 WriteAddr,u16 NumByteToWrite)
{
u32 secpos;
u16 secoff;
u16 secremain;
u16 i;

secpos=WriteAddr/4096;//éèÇøμØÖ· 0~511 for w25x16
secoff=WriteAddr%4096;//ÔúéèÇøÄúμÄÆ«òÆ
secremain=4096-secoff;//éèÇøê￡óà¿Õ¼ä′óD¡

if(NumByteToWrite<=secremain)secremain=NumByteToWrite;//2»′óóú4096¸ö×Ö½ú
while(1)
{
SPI_Flash_Read(SPI_FLASH_BUF,secpos*4096,4096);//¶á3öÕû¸öéèÇøμÄÄúèY
for(i=0;i<secremain;i++)//D￡Ñéêy¾Y
{
if(SPI_FLASH_BUF[secoff+i]!=0XFF)break;//Dèòa2á3y
}
if(i<secremain)//Dèòa2á3y
{
SPI_Flash_Erase_Sector(secpos);//2á3yÕa¸öéèÇø
for(i=0;i<secremain;i++)    //¸′ÖÆ
{
SPI_FLASH_BUF[i+secoff]=pBuffer[i];
}
SPI_Flash_Write_NoCheck(SPI_FLASH_BUF,secpos*4096,4096);//D′èëÕû¸öéèÇø

}else SPI_Flash_Write_NoCheck(pBuffer,WriteAddr,secremain);//D′òÑ¾-2á3yáËμÄ,Ö±½óD′èëéèÇøê￡óàÇø¼ä.
if(NumByteToWrite==secremain)break;//D′èë½áêøáË
else//D′èëÎ′½áêø
{
secpos++;//éèÇøμØÖ·Ôö1
secoff=0;//Æ«òÆÎ»ÖÃÎa0

   pBuffer+=secremain;  //Ö¸ÕëÆ«òÆ
WriteAddr+=secremain;//D′μØÖ·Æ«òÆ
   NumByteToWrite-=secremain; //×Ö½úêyμY¼õ
if(NumByteToWrite>4096)secremain=4096; //ÏÂò»¸öéèÇø»1êÇD′2»íê
else secremain=NumByteToWrite; //ÏÂò»¸öéèÇø¿éòÔD′íêáË
}
};
}
//2á3yÕû¸öD¾Æ¬
//ÕûÆ¬2á3yê±¼ä:
//W25X16:25s
//W25X32:40s
//W25X64:40s
//μè′yê±¼ä3¬3¤...
void SPI_Flash_Erase_Chip(void)
{
SPI_FLASH_Write_Enable();                //SET WEL
SPI_Flash_Wait_Busy();
    SPI_FLASH_CS=0;                         //ê1ÄüÆ÷¼t
SPI2_ReadWriteByte(W25X_ChipErase);       //·￠ËíÆ¬2á3yÃüáî
SPI_FLASH_CS=1;                         //è¡ÏûÆ¬Ñ¡
SPI_Flash_Wait_Busy();       //μè′yD¾Æ¬2á3y½áêø
}
//2á3yò»¸öéèÇø
//Dst_Addr:éèÇøμØÖ· 0~511 for w25x16
//2á3yò»¸öé½ÇøμÄ×îéùê±¼ä:150ms
void SPI_Flash_Erase_Sector(u32 Dst_Addr)
{
Dst_Addr*=4096;
SPI_FLASH_Write_Enable();                //SET WEL
SPI_Flash_Wait_Busy();
    SPI_FLASH_CS=0;                         //ê1ÄüÆ÷¼t
SPI2_ReadWriteByte(W25X_SectorErase);    //·￠ËíéèÇø2á3yÖ¸áî
SPI2_ReadWriteByte((u8)((Dst_Addr)>>16));  //·￠Ëí24bitμØÖ·
SPI2_ReadWriteByte((u8)((Dst_Addr)>>8));
SPI2_ReadWriteByte((u8)Dst_Addr);
SPI_FLASH_CS=1;                         //è¡ÏûÆ¬Ñ¡
SPI_Flash_Wait_Busy();       //μè′y2á3yíê3é
}
//μè′y¿ÕÏD
void SPI_Flash_Wait_Busy(void)
{
while ((SPI_Flash_ReadSR()&0x01)==0x01); // μè′yBUSYÎ»Çå¿Õ
}
//½øèëμôμçÄ￡ê½
void SPI_Flash_PowerDown(void)
{
    SPI_FLASH_CS=0;                         //ê1ÄüÆ÷¼t
SPI2_ReadWriteByte(W25X_PowerDown);       //·￠ËíμôμçÃüáî
SPI_FLASH_CS=1;                         //è¡ÏûÆ¬Ñ¡
delay_us(3);                            //μè′yTPD
}
//»½DÑ
void SPI_Flash_WAKEUP(void)
{
    SPI_FLASH_CS=0;                         //ê1ÄüÆ÷¼t
SPI2_ReadWriteByte(W25X_ReleasePowerDown); //  send W25X_PowerDown command 0xAB
SPI_FLASH_CS=1;                         //è¡ÏûÆ¬Ñ¡
delay_us(3);                            //μè′yTRES1
}

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