sd.c

mp3播放器

      //if( STATUS07_00 & RSPTIMEOUT )
      if( STATUS07_00 &( RSPTIMEOUT | CRC7ERROR ))
      {
         status = KO;
         break;
      }
      //if( STATUS07_00 & CRC7ERROR )
      //{
         //status = KO;
         //break;
      //}
   }

   while( !( STATUS07_00 & XFEREND ))
   {
      //if( STATUS07_00 & DTIMEOUT )
      if( STATUS07_00 &( DTIMEOUT | CRC16ERROR ))
      {
         status = KO;
         break;
      }
      //if( STATUS07_00 & CRC16ERROR )
      //{
         //status = KO;
         //break;
      //}
      //if( SDH_DMA_ACK ==( DMA_ACK_F | DMA_ACK ))
         //SDH_DMA_ACK = 0;
   }

   // what follows is much important for SD_CIF in USB mode,Mason@20060303
   //while( !( STATUS15_08 & BUSYEND ));  // not used in single-block write,Mason@20061030
   
   while( !( STATUS15_08 & BUSYEND ));
   SDH_DMA_ACK = DMA_AUTO;
     
   STATUS07_00 = 0xFF;
   STATUS15_08 = BUSYEND;
*/
   return status;
}
/************************************************
函 数 名: SDCIF_CMD27()
功    能：Programming of the programmable bits of the CSD(128 bits)
说    明：数据存放地址由SDH_DMA_CS决定
调    用：
全局变量：ErrVal
入口参数：无
出口参数：无
返 回 值：无
************************************************/
Bool SDCIF_CMD27( void )
{
   Bool status = OK;
   
   BLKLEN11_08 = 0x00;  //SET_BLOCKLEN
   BLKLEN07_00 = 128 / 8;
   DATACON = XFER_MODE_1;  //block write
   //argument dont't care
   CMDCON = WAITRSP | DATA_WITH;
   CMDINDEX = PROGRAM_CSD;
   while( !( STATUS07_00 & CMDSEND ));
   while( !( STATUS07_00 & RSPRXVP ))
   {
      /*if(( STATUS07_00 & RSPTIMEOUT )
         ||( STATUS07_00 & CRC7ERROR ))*/
      if( STATUS07_00 &( RSPTIMEOUT | CRC7ERROR ))
      {
         status = KO;
         break;
      }
   }
   while( !(STATUS07_00 & XFEREND ))
   {
      /*if(( STATUS07_00 & DTIMEOUT )
         ||( STATUS07_00 & CRC16ERROR ))*/
      if( STATUS07_00 &( DTIMEOUT | CRC16ERROR ))
      {
         status = KO;
         break;
      }
   }
   while( !( STATUS15_08 & BUSYEND ));
   SDH_DMA_ACK &= ~DMA_ACK_F; //DMA acknowledge flag

   STATUS07_00 = 0xFF;
   STATUS15_08 = BUSYEND;
   return status;
}
/************************************************
函 数 名: SDCIF_CMD28()
功    能：This command sets the write protection bit of the addressed group. 
          The properties of write protection are coded in the card specific data(WP_GRP_SIZE)
说    明：
调    用：
全局变量：ErrVal, SD_lba(FlashAddr[3:0])
入口参数：无
出口参数：无
返 回 值：无
************************************************/
Bool SDCIF_CMD28( void )
{
   Bool status = OK;
   DATACON = XFER_MODE_2;  //check busy
   ARG31_24 = SDVar.FlashAddr[ 0 ]; //argument = SD_lba(FlashAddr[3:0])
   ARG23_16 = SDVar.FlashAddr[ 1 ];
   ARG15_08 = SDVar.FlashAddr[ 2 ];
   ARG07_00 = SDVar.FlashAddr[ 3 ];
   CMDCON = WAITRSP | DATA_WITH;
   CMDINDEX = SET_WRITE_PROT;
   while( !(STATUS07_00 & CMDSEND ));
   while( !(STATUS07_00 & RSPRXVP ))
   {
      /*if(( STATUS07_00 & RSPTIMEOUT )
         ||( STATUS07_00 & CRC7ERROR ))*/
      if( STATUS07_00 &( RSPTIMEOUT | CRC7ERROR ))
      {
         status = KO;
         break;
      }
   }
   while( !( STATUS15_08 & BUSYEND ));

   STATUS07_00 = 0xFF;
   STATUS15_08 = BUSYEND;
   return status;
}
/************************************************
函 数 名: SDCIF_CMD29()
功    能：This command clears the write protection bit of the addressed group
说    明：
调    用：
全局变量：ErrVal, SD_lba(FlashAddr[3:0])
入口参数：无
出口参数：无
返 回 值：无
************************************************/
Bool SDCIF_CMD29( void )
{
   Bool status = OK;
   
   DATACON = XFER_MODE_2;  //check busy
   ARG31_24 = SDVar.FlashAddr[ 0 ]; //argument = SD_lba(FlashAddr[3:0])
   ARG23_16 = SDVar.FlashAddr[ 1 ];
   ARG15_08 = SDVar.FlashAddr[ 2 ];
   ARG07_00 = SDVar.FlashAddr[ 3 ];
   CMDCON = WAITRSP | DATA_WITH;
   CMDINDEX = CLR_WRITE_PROT;
   while( !( STATUS07_00 & CMDSEND ));
   while(!( STATUS07_00 & RSPRXVP ))
   {
      /*if(( STATUS07_00 & RSPTIMEOUT )
         ||( STATUS07_00 & CRC7ERROR ))*/
      if( STATUS07_00 &( RSPTIMEOUT | CRC7ERROR ))
      {
         status = KO;
         break;
      }
   }
   while( !( STATUS15_08 & BUSYEND ));

   STATUS07_00 = 0xFF;
   STATUS15_08 = BUSYEND;
   return status;
}
/************************************************
函 数 名: SDCIF_CMD30()
功    能：This command asks the card to send the status of the write protection bits
说    明：数据存放地址由SDH_DMA_CS决定
调    用：
全局变量：ErrVal, SD_lba(FlashAddr[3:0])
入口参数：无
出口参数：无
返 回 值：无
************************************************/
Bool SDCIF_CMD30( void )
{
   Bool status = OK;
   
   BLKLEN11_08 = 0x00;  //SET_BLOCKLEN
   BLKLEN07_00 = 0x04;
   DATACON = XFER_MODE_0;  //block read
   ARG31_24 = SDVar.FlashAddr[ 0 ]; //argument = SD_lba(FlashAddr[3:0])
   ARG23_16 = SDVar.FlashAddr[ 1 ];
   ARG15_08 = SDVar.FlashAddr[ 2 ];
   ARG07_00 = SDVar.FlashAddr[ 3 ];
   CMDCON = WAITRSP | DATA_WITH;
   CMDINDEX = SEND_WRITE_PROT;
   while( !( STATUS07_00 & CMDSEND ));
   while( !( STATUS07_00 & RSPRXVP ))
   {
      /*if(( STATUS07_00 & RSPTIMEOUT )
         ||( STATUS07_00 & CRC7ERROR ))*/
      if( STATUS07_00 &( RSPTIMEOUT | CRC7ERROR ))
      {
         status = KO;
         break;
      }
   }

   while( !( STATUS07_00 & XFEREND ))
   {
      /*if(( STATUS07_00 & DTIMEOUT )
         ||( STATUS07_00 & CRC16ERROR ))*/
      if( STATUS07_00 &( DTIMEOUT | CRC16ERROR ))
      {
         status = KO;
         break;
      }
   }
   STATUS07_00 = 0xFF;
   return status;
}
/************************************************
函 数 名: SDCIF_CMD32()
功    能：Sets the address of the first write block to be erased
说    明：
调    用：
全局变量：ErrVal, SD_lba(FlashAddr[3:0])
入口参数：无
出口参数：无
返 回 值：无
************************************************/
Bool SDCIF_CMD32( void )
{
   Bool status = OK;
   
   ARG31_24 = SDVar.FlashAddr[ 0 ]; //argument = SD_lba(FlashAddr[3:0])
   ARG23_16 = SDVar.FlashAddr[ 1 ];
   ARG15_08 = SDVar.FlashAddr[ 2 ];
   ARG07_00 = SDVar.FlashAddr[ 3 ];
   CMDCON = WAITRSP;
   CMDINDEX = ERASE_WR_BLK_START;
   while( !( STATUS07_00 & CMDSEND ));
   while( !( STATUS07_00 & RSPRXVP ))
   {
      /*if(( STATUS07_00 & RSPTIMEOUT )
         ||( STATUS07_00 & CRC7ERROR ))*/
      if( STATUS07_00 &( RSPTIMEOUT | CRC7ERROR ))
      {
         status = KO;
         break;
      }
   }
   STATUS07_00 = 0xFF;
   return status;
}
/************************************************
函 数 名: SDCIF_CMD33()
功    能：Sets the address of the last write block of the continuous range to be erased
说    明：
调    用：
全局变量：ErrVal, SD_lba(FlashAddr[3:0])
入口参数：无
出口参数：无
返 回 值：无
************************************************/
Bol SDCIF_CMD33( void )
{
   Bool status = OK;
   
   ARG31_24 = SDVar.FlashAddr[ 0 ]; //argument = SD_lba(FlashAddr[3:0])
   ARG23_16 = SDVar.FlashAddr[ 1 ];
   ARG15_08 = SDVar.FlashAddr[ 2 ];
   ARG07_00 = SDVar.FlashAddr[ 3 ];
   CMDCON = WAITRSP;
   CMDINDEX = ERASE_WR_BLK_END;
   while( !( STATUS07_00 & CMDSEND ));
   while(!(STATUS07_00 & RSPRXVP))
   {
      /*if(( STATUS07_00 & RSPTIMEOUT )
         ||( STATUS07_00 & CRC7ERROR ))*/
      if( STATUS07_00 &( RSPTIMEOUT | CRC7ERROR ))
      {
         status = KO;
         break;
      }
   }
   STATUS07_00 = 0xFF;
   return status;
}
/************************************************
函 数 名: SDCIF_CMD38()
功    能：Erases all previously selected write blocks
说    明：
调    用：
全局变量：ErrVal
入口参数：无
出口参数：无
返 回 值：无
************************************************/
Bool SDCIF_CMD38( void )
{
   Bool status = OK;
   
   //argument dont't care
   DATACON = XFER_MODE_2;  //check busy
   CMDCON = WAITRSP;
   CMDINDEX = ERASE;
   while( !( STATUS07_00 & CMDSEND ));
   while( !( STATUS07_00 & RSPRXVP ))
   {
      /*if(( STATUS07_00 & RSPTIMEOUT )
         ||( STATUS07_00 & CRC7ERROR ))*/
      if( STATUS07_00 &( RSPTIMEOUT | CRC7ERROR ))
      {
         status = KO;
         break;
      }
   }
   while( !( STATUS15_08 & BUSYEND ));
   STATUS07_00 = 0xFF;
   STATUS15_08 = BUSYEND;
   return status;
}
/************************************************
函 数 名: SDCIF_CMD42()
功    能：Used to set/reset the password or lock/unlock the card
          The size of the data block is set by the SET_BLOCK_LEN command
说    明：数据存放地址由SDH_DMA_CS决定
调    用：
全局变量：ErrVal
入口参数：BlockLen: 块长度, 由CMD16设置
出口参数：无
返 回 值：无
************************************************/
Bool SDCIF_CMD42( U8 BlockLen )
{
   Bool status = OK;
   BLKLEN11_08 = (U8)( BlockLen >> 8 );   //SET_BLOCKLEN
   BLKLEN07_00 = (U8)BlockLen;
   DATACON = XFER_MODE_1;  //block write
   //argument dont't care
   CMDCON = WAITRSP | DATA_WITH;
   CMDINDEX = LOCK_UNLOCK;
   while( !( STATUS07_00 & CMDSEND ));
   while( !( STATUS07_00 & RSPRXVP ))
   {
      /*if(( STATUS07_00 & RSPTIMEOUT )
         ||( STATUS07_00 & CRC7ERROR ))*/
      if( STATUS07_00 &( RSPTIMEOUT | CRC7ERROR ))
      {
         status = KO;
         break;
      }
   }
   while( !( STATUS07_00 & XFEREND ))
   {
      /*if(( STATUS07_00 & DTIMEOUT )
         ||( STATUS07_00 & CRC16ERROR ))*/
      if( STATUS07_00 &( DTIMEOUT | CRC16ERROR ))
      {
         status = KO;
         break;
      }
   }
   while( !( STATUS15_08 & BUSYEND ));
   SDH_DMA_ACK &= ~DMA_ACK_F;//DMA acknowledge flag

   STATUS07_00 = 0xFF;
   STATUS15_08 = BUSYEND;
   return status;
}
#endif
/************************************************
函 数 名: SDCIF_CMD55()
功    能：Indicates to the card that the next command is an
          application specific command rather than a
          standard command
说    明：
调    用：
全局变量：RCA
入口参数：无
出口参数：无
返 回 值：无
************************************************/
Bool SDCIF_CMD55( void )
{
   Bool status = OK;
   ARG31_24 = SDVar.RCA[ 1 ]; //argument = RCA
   ARG23_16 = SDVar.RCA[ 0 ];
   ARG15_08 = 0;
   ARG07_00 = 0;
   CMDCON = WAITRSP;
   CMDINDEX = APP_CMD;
   while( !( STATUS07_00 & CMDSEND ));
   while( !( STATUS07_00 & RSPRXVP ))
   {
      /*if(( STATUS07_00 & RSPTIMEOUT )
         ||( STATUS07_00 & CRC7ERROR ))*/
      if( STATUS07_00 &( RSPTIMEOUT | CRC7ERROR ))
      {
         //STATUS07_00 = 0xFF;
         //return KO;
         status = KO;
         break;
      }
   }
   STATUS07_00 = 0xFF;
   //return OK;
   return status;
}

/************************************************
函 数 名: SDCIF_ACMD06()
功    能：Defines the data bus width('00' = 1bit or '10' = 4 bits bus)to be used for data transfer
说    明：用于SD卡
调    用：
全局变量：ErrVal, BusBits
入口参数：无
出口参数：无
返 回 值：无
************************************************/
//设置SD卡数据总线宽度
Bool SDCIF_ACMD06( void )
{
   Bool status = OK;
   
   ARG31_24 = 0;
   ARG23_16 = 0;
   ARG15_08 = 0;
   ARG07_00 = SDVar.BusBits;  //argument = bus wide
   CMDCON = WAITRSP;
   CMDINDEX = SET_BUS_WIDTH;
   while( !( STATUS07_00 & CMDSEND ));
   while( !( STATUS07_00 & RSPRXVP ))
   {
      /*if(( STATUS07_00 & RSPTIMEOUT )
         ||( STATUS07_00 & CRC7ERROR ))*/
      if( STATUS07_00 &( RSPTIMEOUT | CRC7ERROR ))
      {
         //STATUS07_00 = 0xFF;
         //return KO;
         status = KO;
         break;
      }
   }
   STATUS07_00 = 0xFF;

   // set up SD_CIF Host bus bit I/F after SD Card
   if( SDVar.BusBits == 2 )
      //SDIFCON0 = WIDEBUS | CLK_EN;
      SDIFCON0 = WIDEBUS | CLK_EN/* | HISPEED*/;
   else
      //SDIFCON0 = WIDEBUS;
      SDIFCON0 = CLK_EN;
   //return OK;
   return status;
}
/************************************************
函 数 名: SDCIF_ACMD13()
功    能：Send the SD Card status(512 bits)
说    明：数据存放地址由SDH_DMA_CS决定
调    用：必须先调用SDCIF_CMD55()
全局变量：ErrVal
入口参数：无
出口参数：无
返 回 值：无
************************************************/
#if 0
void SDCIF_ACMD13( void )
{
   SDVar.ErrVal = 0;
   //argument dont't care
   BLKLEN11_08 = 0x00;  //SET_BLOCKLEN
   BLKLEN07_00 = 512 / 8;
   CMDCON = WAITRSP | DATA_WITH;
   CMDINDEX = SD_STATUS;
   while( !( STATUS07_00 & CMDSEND ));
   while( !( STATUS07_00 & RSPRXVP ))
   {
      if(( STATUS07_00 & RSPTIMEOUT )
         ||( STATUS07_00 & CRC7ERROR ))
      {
         SDVar.ErrVal = 1;
         STATUS07_00 = 0xFF;
         return;
      }
   }
   while( !( STATUS07_00 & XFEREND ))
   {
      if(( STATUS07_00 & DTIMEOUT )
         ||( STATUS07_00 & CRC16ERROR ))
      {
         SDVar.ErrVal = 1;
         STATUS07_00 = 0xFF;
         return;
      }
   }
   STATUS07_00 = 0xFF;
}
/************************************************
函 数 名: SDCIF_ACMD22()
功    能：Send the number of the written (without errors) write blocks
          Responds with 32 bits + CRC data block
说    明：数据存放地址由SDH_DMA_CS决定
调    用：必须先调用SDCIF_CMD55()
全局变量：ErrVal
入口参数：无
出口参数：无
返 回 值：无
************************************************/
void SDCIF_ACMD22( void )
{
   SDVar.ErrVal = 0;
   //argument dont't care
   BLKLEN11_08 = 0x00;//SET_BLOCKLEN
   BLKLEN07_00 = 32 / 8;
   CMDCON = WAITRSP | DATA_WITH;
   CMDINDEX = SEND_NUMBER_WR_BLOCKS;
   while( !( STATUS07_00 & CMDSEND ));
   while( !( STATUS07_00 & RSPRXVP ))
   {
      if(( STATUS07_00 & RSPTIMEOUT )
         ||( STATUS07_00 & CRC7ERROR ))
      {
         SDVar.ErrVal = 1;
         STATUS07_00 = 0xFF;
         return;
      }
   }
   while( !( STATUS07_00 & XFEREND ))
   {
      if(( STATUS07_00 & DTIMEOUT )
         ||( STATUS07_00 & CRC16ERROR ))
      {
         SDVar.ErrVal = 1;
         STATUS07_00 = 0xFF;
         return;
      }
   }
   STATUS07_00 = 0xFF;
}
#endif
/************************************************
函 数 名: SDCIF_ACMD41()
功    能：Asks the accessed card to send its operating
          condition register (OCR) content in the 
		  response on the CMD line