stm32f769 寄存器配置SD卡驱动--SD_GetCardInfo

ti

本帖最后由 lee_st 于 2018-3-24 10:36 编辑

下面是实现sd卡详细信息的函数SD_GetCardInfoSD_Error SD_GetCardInfo(SD_CardInfo *cardinfo)
{
      SD_Error errorstatus=SD_OK;
      u8 tmp=0;
      cardinfo->CardType=(u8)CardType;                               //卡类型
      cardinfo->RCA=(u16)RCA;                                                       //卡RCA值
      tmp=(u8)((CSD_Tab[0]&0xFF000000)>>24);
      cardinfo->SD_csd.CSDStruct=(tmp&0xC0)>>6;             //CSD结构
      cardinfo->SD_csd.SysSpecVersion=(tmp&0x3C)>>2;       //2.0协议还没定义这部分(为保留),应该是后续协议定义的
      cardinfo->SD_csd.Reserved1=tmp&0x03;                      //2个保留位
      tmp=(u8)((CSD_Tab[0]&0x00FF0000)>>16);                      //第1个字节
      cardinfo->SD_csd.TAAC=tmp;                                                //数据读时间1
      tmp=(u8)((CSD_Tab[0]&0x0000FF00)>>8);                       //第2个字节
      cardinfo->SD_csd.NSAC=tmp;                                               //数据读时间2
      tmp=(u8)(CSD_Tab[0]&0x000000FF);                               //第3个字节
      cardinfo->SD_csd.MaxBusClkFrec=tmp;                             //传输速度
      tmp=(u8)((CSD_Tab[1]&0xFF000000)>>24);                      //第4个字节
      cardinfo->SD_csd.CardComdClasses=tmp<<4;       //卡指令类高四位
      tmp=(u8)((CSD_Tab[1]&0x00FF0000)>>16);                    //第5个字节
      cardinfo->SD_csd.CardComdClasses|=(tmp&0xF0)>>4;//卡指令类低四位
      cardinfo->SD_csd.RdBlockLen=tmp&0x0F;               //最大读取数据长度
      tmp=(u8)((CSD_Tab[1]&0x0000FF00)>>8);                      //第6个字节
      cardinfo->SD_csd.PartBlockRead=(tmp&0x80)>>7;       //允许分块读
      cardinfo->SD_csd.WrBlockMisalign=(tmp&0x40)>>6;       //写块错位
      cardinfo->SD_csd.RdBlockMisalign=(tmp&0x20)>>5;       //读块错位
      cardinfo->SD_csd.DSRImpl=(tmp&0x10)>>4;
      cardinfo->SD_csd.Reserved2=0;                                     //保留
      if((CardType==STD_CAPACITY_SD_CARD_V1_1)||(CardType==STD_CAPACITY_SD_CARD_V2_0)||(MULtiMEDIA_CARD==CardType))//标准1.1/2.0卡/MMC卡
      {
            cardinfo->SD_csd.DeviceSize=(tmp&0x03)<<10;       //C_SIZE(12位)
             tmp=(u8)(CSD_Tab[1]&0x000000FF);                      //第7个字节
            cardinfo->SD_csd.DeviceSize|=(tmp)<<2;
            tmp=(u8)((CSD_Tab[2]&0xFF000000)>>24);             //第8个字节
            cardinfo->SD_csd.DeviceSize|=(tmp&0xC0)>>6;
            cardinfo->SD_csd.MaxRdCurrentVDDMin=(tmp&0x38)>>3;
            cardinfo->SD_csd.MaxRdCurrentVDDMax=(tmp&0x07);
            tmp=(u8)((CSD_Tab[2]&0x00FF0000)>>16);             //第9个字节
            cardinfo->SD_csd.MaxWrCurrentVDDMin=(tmp&0xE0)>>5;
            cardinfo->SD_csd.MaxWrCurrentVDDMax=(tmp&0x1C)>>2;
            cardinfo->SD_csd.DeviceSizeMul=(tmp&0x03)<<1;//C_SIZE_MULT
            tmp=(u8)((CSD_Tab[2]&0x0000FF00)>>8);                 //第10个字节
            cardinfo->SD_csd.DeviceSizeMul|=(tmp&0x80)>>7;
            cardinfo->CardCapacity=(cardinfo->SD_csd.DeviceSize+1);//计算卡容量
            cardinfo->CardCapacity*=(1<<(cardinfo->SD_csd.DeviceSizeMul+2));
            cardinfo->CardBlockSize=1<<(cardinfo->SD_csd.RdBlockLen);//块大小
            cardinfo->CardCapacity*=cardinfo->CardBlockSize;
      }else if(CardType==HIGH_CAPACITY_SD_CARD)       //高容量卡
      {
            tmp=(u8)(CSD_Tab[1]&0x000000FF);             //第7个字节
            cardinfo->SD_csd.DeviceSize=(tmp&0x3F)<<16;//C_SIZE
            tmp=(u8)((CSD_Tab[2]&0xFF000000)>>24);       //第8个字节
            cardinfo->SD_csd.DeviceSize|=(tmp<<8);
            tmp=(u8)((CSD_Tab[2]&0x00FF0000)>>16);       //第9个字节
            cardinfo->SD_csd.DeviceSize|=(tmp);
            tmp=(u8)((CSD_Tab[2]&0x0000FF00)>>8);       //第10个字节
            cardinfo->CardCapacity=(long long)(cardinfo->SD_csd.DeviceSize+1)*512*1024;//计算卡容量
            cardinfo->CardBlockSize=512;                      //块大小固定为512字节
      }
      cardinfo->SD_csd.EraseGrSize=(tmp&0x40)>>6;
      cardinfo->SD_csd.EraseGrMul=(tmp&0x3F)<<1;
      tmp=(u8)(CSD_Tab[2]&0x000000FF);                      //第11个字节
      cardinfo->SD_csd.EraseGrMul|=(tmp&0x80)>>7;
      cardinfo->SD_csd.WrProtectGrSize=(tmp&0x7F);
      tmp=(u8)((CSD_Tab[3]&0xFF000000)>>24);             //第12个字节
      cardinfo->SD_csd.WrProtectGrEnable=(tmp&0x80)>>7;
      cardinfo->SD_csd.ManDeflECC=(tmp&0x60)>>5;
      cardinfo->SD_csd.WrSpeedFact=(tmp&0x1C)>>2;
      cardinfo->SD_csd.MaxWrBlockLen=(tmp&0x03)<<2;
      tmp=(u8)((CSD_Tab[3]&0x00FF0000)>>16);             //第13个字节
      cardinfo->SD_csd.MaxWrBlockLen|=(tmp&0xC0)>>6;
      cardinfo->SD_csd.WriteBlockPaPartial=(tmp&0x20)>>5;
      cardinfo->SD_csd.Reserved3=0;
      cardinfo->SD_csd.ContentProtectAppli=(tmp&0x01);
      tmp=(u8)((CSD_Tab[3]&0x0000FF00)>>8);             //第14个字节
      cardinfo->SD_csd.FileFormatGrouop=(tmp&0x80)>>7;
      cardinfo->SD_csd.CopyFlag=(tmp&0x40)>>6;
      cardinfo->SD_csd.PermWrProtect=(tmp&0x20)>>5;
      cardinfo->SD_csd.TempWrProtect=(tmp&0x10)>>4;
      cardinfo->SD_csd.FileFormat=(tmp&0x0C)>>2;
      cardinfo->SD_csd.ECC=(tmp&0x03);
      tmp=(u8)(CSD_Tab[3]&0x000000FF);                      //第15个字节
      cardinfo->SD_csd.CSD_CRC=(tmp&0xFE)>>1;
      cardinfo->SD_csd.Reserved4=1;
      tmp=(u8)((CID_Tab[0]&0xFF000000)>>24);             //第0个字节
      cardinfo->SD_cid.ManufacturerID=tmp;
      tmp=(u8)((CID_Tab[0]&0x00FF0000)>>16);             //第1个字节
      cardinfo->SD_cid.OEM_AppliID=tmp<<8;
      tmp=(u8)((CID_Tab[0]&0x000000FF00)>>8);             //第2个字节
      cardinfo->SD_cid.OEM_AppliID|=tmp;
      tmp=(u8)(CID_Tab[0]&0x000000FF);                      //第3个字节
      cardinfo->SD_cid.ProdName1=tmp<<24;
      tmp=(u8)((CID_Tab[1]&0xFF000000)>>24);             //第4个字节
      cardinfo->SD_cid.ProdName1|=tmp<<16;
      tmp=(u8)((CID_Tab[1]&0x00FF0000)>>16);                  //第5个字节
      cardinfo->SD_cid.ProdName1|=tmp<<8;
      tmp=(u8)((CID_Tab[1]&0x0000FF00)>>8);             //第6个字节
      cardinfo->SD_cid.ProdName1|=tmp;
      tmp=(u8)(CID_Tab[1]&0x000000FF);                       //第7个字节
      cardinfo->SD_cid.ProdName2=tmp;
      tmp=(u8)((CID_Tab[2]&0xFF000000)>>24);             //第8个字节
      cardinfo->SD_cid.ProdRev=tmp;
      tmp=(u8)((CID_Tab[2]&0x00FF0000)>>16);             //第9个字节
      cardinfo->SD_cid.ProdSN=tmp<<24;
      tmp=(u8)((CID_Tab[2]&0x0000FF00)>>8);             //第10个字节
      cardinfo->SD_cid.ProdSN|=tmp<<16;
      tmp=(u8)(CID_Tab[2]&0x000000FF);                         //第11个字节
      cardinfo->SD_cid.ProdSN|=tmp<<8;
      tmp=(u8)((CID_Tab[3]&0xFF000000)>>24);             //第12个字节
      cardinfo->SD_cid.ProdSN|=tmp;
      tmp=(u8)((CID_Tab[3]&0x00FF0000)>>16);              //第13个字节
      cardinfo->SD_cid.Reserved1|=(tmp&0xF0)>>4;
      cardinfo->SD_cid.ManufactDate=(tmp&0x0F)<<8;
      tmp=(u8)((CID_Tab[3]&0x0000FF00)>>8);             //第14个字节
      cardinfo->SD_cid.ManufactDate|=tmp;
      tmp=(u8)(CID_Tab[3]&0x000000FF);                      //第15个字节
      cardinfo->SD_cid.CID_CRC=(tmp&0xFE)>>1;
      cardinfo->SD_cid.Reserved2=1;
      return errorstatus;
}

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stm32f769 寄存器配置SD卡驱动--SD_GetCardInfo

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