给你一个调试成功的代码
Uint8 SD_Init(void)
{
    Uint8 time=0;
    temp = 0;
    Uint8 Rev_Data[4]={0};
    Uint8 pcmd8[] = {0x48,0x00,0x00,0x01,0xAA,0x87};  //CMD8
    Uint8 pcmd55[] = {0x77,0x00,0x00,0x00,0x00,0x00};  //CMD55
    Uint8 pcmd41[] = {0x69,0x40,0x00,0x00,0x00,0x00};  //CMD41
    Uint8 pcmd58[] = {0x7A,0x00,0x00,0x00,0x00,0x00};  //CMD58
   
  
    P9OUT &= ~BIT0;   //打开片选
     temp = SD_WriteCmd(pcmd8);  //读取卡片版本
     if(temp==0x05)
     {
       SD_Type =SDV1;
          //设置卡类型为SD V1.0，如果是V1.0卡，CM8指令后没有后续数据
       P9OUT |= BIT0;
       SD_ReadWriteByte(0xff); //多发8时钟
       P9OUT &= ~BIT0;
       do
       {
       temp = SD_WriteCmd(pcmd55);
       if(temp!=0x01) return temp;
       temp = SD_WriteCmd(pcmd41);
       time++;
       }while((temp!= 0x00)&& (time<200));
       P9OUT |= BIT0;
     }// if(temp==0x05)
     else if(temp == 0x01)
     {
          //V2.0卡，CM8命令后会传回4字节的数据，要跳过再结束本命令
          Rev_Data[0] = SD_ReadWriteByte(0xff);  //返回0x00
          Rev_Data[1] = SD_ReadWriteByte(0xff);  //返回0x00
          Rev_Data[2] = SD_ReadWriteByte(0xff);  //返回0x01
          Rev_Data[3] = SD_ReadWriteByte(0xff);  //返回0xAA
           
          P9OUT |= BIT0;
          SD_ReadWriteByte(0xff); //多发8时钟
          P9OUT &= ~BIT0;
        do
         {
          temp = SD_WriteCmd(pcmd55);
          if(temp!=0x01) return temp;
          temp = SD_WriteCmd(pcmd41);
          time++;
          if(time>250) return temp;
          }while(temp!= 0x00);
         
    //初始化指令发送完成，接下来获取OCR信息
    /*------鉴别SD2.0卡版本--------------*/
      
         temp=SD_WriteCmd(pcmd58);
         if(temp != 0x00)return temp;
       //读OCR指令发出后，紧接着是4字节的OCR信息
          Rev_Data[0] = SD_ReadWriteByte(0xff);  
          Rev_Data[1] = SD_ReadWriteByte(0xff);  
          Rev_Data[2] = SD_ReadWriteByte(0xff);  
          Rev_Data[3] = SD_ReadWriteByte(0xff);
          P9OUT |= BIT0;
          SD_ReadWriteByte(0xff);
          if(Rev_Data[0] & 0x40) SD_Type = SDHC;
           else SD_Type =SDV2;
     }// else if(temp == 0x01)
   
       UCB2BR0 = 0x01;  //SD为高速
       UCB2BR1 = 0x00;               
    return 1;