sdcmd.c

atmel de booloader 内有源代码 用blb编译

** Created by:    MingYuan Zheng 郑明远 
** Created Date:  2006-01-09 
**-------------------------------------------------------------------------------------------------------
** Modified by:
** Modified Date: 
**------------------------------------------------------------------------------------------------------
********************************************************************************************************/
INT8U SD_GetRCA(INT8U card_type, INT16U *RCA)
{
	INT32U param = *RCA << 16;
	INT8U response[6],tmp;
			
	tmp = SD_SendCommand(CMD3, param, CMD3_R, response); /* 向卡获取RCA命令 command that get RCA from card */
	if (tmp != SD_NO_ERR)
     	return tmp;
    
    if (card_type == 0)					    /* SD card */ 	
        *RCA = ((response[4] << 8) + response[3]);			 /* 取得响应中的RCA域 get RCA fields from response */
    
    return SD_NO_ERR;
}


/*********************************************************************************************************
** Function name: SD_SelectCard
** Descriptions:  select card
**                选择卡
** Input: 		  INT16U RCA   : 卡的RCA				INPUT:	  INT16U RCA  : the RCA of card
** Output: 		  0:   正确    >0:   错误码		  		Output:	  0:  right		>0:  error code
** Created by:    MingYuan Zheng 郑明远 
** Created Date:  2006-01-09 
**-------------------------------------------------------------------------------------------------------
** Modified by:
** Modified Date: 
**------------------------------------------------------------------------------------------------------
********************************************************************************************************/
INT8U SD_SelectCard(INT16U RCA)
{
	INT32U param;
	INT8U response[6], tmp;
	
	param = (INT32U)RCA << 16; 
	tmp = SD_SendCommand(CMD7, param, CMD7_R, response);  /* 选择卡命令 command that select card */
	if (tmp != SD_NO_ERR)
     	return tmp;

    return SD_NO_ERR;
}


/*********************************************************************************************************
** Function name: SD_DeSelectCard
** Descriptions:  deselect card
**                不选择卡
** Input: 		  NULL
** Output: 		  0:   正确    >0:   错误码		  		Output:	  0:  right		>0:  error code
** Created by:    MingYuan Zheng 郑明远 
** Created Date:  2006-01-09 
**-------------------------------------------------------------------------------------------------------
** Modified by:
** Modified Date: 
**------------------------------------------------------------------------------------------------------
********************************************************************************************************/
INT8U SD_DeSelectCard(void)
{
	INT32U param = 0;
	INT8U response[6], tmp;
	
	tmp = SD_SendCommand(CMD7, param, CMD0_R, response);   /* 不选择卡命令 command that deselect card */
	if (tmp != SD_NO_ERR)
     	return tmp;
     
    return SD_NO_ERR;
}


/*********************************************************************************************************
** Function name: SD_ReadCSD
** Descriptions:  read CSD register of card 
**                读卡的CSD寄存器
** Input: 		  INT8U csdlen  : 寄存器长度(固定为16)	INT8U csdlen  : len of register (fixed,is 16)
				  INT8U *recbuf : 接收缓冲区			INT8U *recbuf : recbuffer
** Output: 		  0:   正确    >0:   错误码		  		0:  right		>0:  error code
** Created by:    MingYuan Zheng 郑明远 
** Created Date:  2006-01-09 
**-------------------------------------------------------------------------------------------------------
** Modified by:
** Modified Date: 
**------------------------------------------------------------------------------------------------------
********************************************************************************************************/
INT8U SD_ReadCSD(INT16U RCA, INT8U csdlen, INT8U *recbuf)
{
	INT32U param;
    INT8U response[17], tmp;
    
    param = (INT32U)RCA << 16;
          
    tmp = SD_SendCommand(CMD9, param, CMD9_R, response);    /* 读CSD寄存器命令 command that read CSD register */
    if (tmp != SD_NO_ERR) 									
        return tmp;									
  	
 	for (tmp = 0; tmp < csdlen; tmp++)						/* 从响应中取得CSD get CSD from response */
 		recbuf[tmp] = response[tmp];
  	      
    return SD_NO_ERR; 
}


/*********************************************************************************************************
** Function name: SD_ReadCID
** Descriptions:  read CID register of card
**                读卡的CID寄存器
** Input: 		  INT16U RCA    : 卡RCA地址				INT16U RCA	  : the card RCA
				  INT8U cidlen  : 寄存器长度(固定为16)	INT8U cidlen  : len of register (fixed,is 16)
				  INT8U *recbuf : 接收缓冲区			INT8U *recbuf : recbuffer	
** Output: 		  0:   正确    >0:   错误码		  		Output:	  0:  right		>0:  error code
** Created by:    MingYuan Zheng 郑明远 
** Created Date:  2006-01-09 
**-------------------------------------------------------------------------------------------------------
** Modified by:
** Modified Date: 
**------------------------------------------------------------------------------------------------------
********************************************************************************************************/
INT8U SD_ReadCID(INT16U RCA, INT8U cidlen, INT8U *recbuf)
{
    INT32U param;
    INT8U response[17], tmp;
 
 	param = (INT32U)RCA << 16;
    
 	tmp = SD_SendCommand(CMD10, param, CMD10_R, response);	 /* 读CID寄存器命令 command that read CID register */
 	if (tmp != SD_NO_ERR)
     	return tmp;
 
 	for (tmp = 0; tmp < 16; tmp++)
 		recbuf[tmp] = response[tmp];						 /* 从响应中取得CID get CID from response */
	
	return SD_NO_ERR;
}


/*********************************************************************************************************
** Function name: SD_StopTransmission
** Descriptions:  stop data transmission
**                停止数据传输
** Input: 		  NULL
** Output: 		  0:   正确    >0:   错误码		  		0:  right		>0:  error code
** Created by:    MingYuan Zheng 郑明远 
** Created Date:  2006-01-09 
**-------------------------------------------------------------------------------------------------------
** Modified by:
** Modified Date: 
**------------------------------------------------------------------------------------------------------
********************************************************************************************************/
INT8U SD_StopTransmission(void)
{
	INT32U param = 0;
	INT8U response[6];
	
 	return (SD_SendCommand(CMD12, param, CMD12_R, response)); /* 结束数据传输命令失败 stop transmission command fail */
}


/*********************************************************************************************************
** Function name: SD_ReadCard_Status
** Descriptions:  read Card Status register of sd card
**                读SD卡的 Card Status 寄存器
** Input: 		  INT16U RCA    : 卡RCA地址				INT16U RCA	  : the card RCA
				  INT8U len  	: 寄存器长度(固定为4)	INT8U len     : len of register (fixed,is 4)
				  INT8U *recbuf : 接收缓冲区			INT8U *recbuf : recbuffer	
** Output: 		  0:   正确    >0:   错误码		  		 0:  right		>0:  error code
** Created by:    MingYuan Zheng 郑明远 
** Created Date:  2006-01-09 
**-------------------------------------------------------------------------------------------------------
** Modified by:
** Modified Date: 
**------------------------------------------------------------------------------------------------------
********************************************************************************************************/
INT8U SD_ReadCard_Status(INT16U RCA, INT8U len, INT8U *buffer)
{
	INT32U param;
    INT8U response[6],tmp;
    
    param = (INT32U)RCA << 16;
   
    tmp = SD_SendCommand(CMD13, param, CMD13_R, response);    /* 读 Card_Status 寄存器   read register of Card Status */
 	if (tmp != SD_NO_ERR)
 		return tmp;
    
    for (tmp = 0; tmp < 4; tmp++)							  /* 从响应中取得Card_Status read Card_Status from response */
 		buffer[tmp] = response[tmp + 1];			
 
 	return SD_NO_ERR;  	
}


/*********************************************************************************************************
** Function name: SD_GoInactive
** Descriptions:  forbid card into inactive state
**                使卡进入停止状态
** Input: 		  INT16U RCA    : 卡RCA地址				INT16U RCA	   : the card RCA
** Output: 		  0:   正确    >0:   错误码		  		0:  right		>0:  error code
** Created by:    Ming Yuan Zheng 郑明远 
** Created Date:  2006-01-09 
**-------------------------------------------------------------------------------------------------------
** Modified by:
** Modified Date: 
**------------------------------------------------------------------------------------------------------
********************************************************************************************************/
INT8U SD_GoInactive(INT16U RCA)
{
	INT32U param;
    INT8U response[6], tmp;
    
    param = (INT32U)RCA << 16;
    
    tmp = SD_SendCommand(CMD15, param, CMD15_R, response);  /* 使卡进入停止状态 forbid card into inactive state */

 	return tmp;	
}


/*********************************************************************************************************
** Function name: SD_SetBlockLen
** Descriptions:  set a block len of card
**                设置卡一个块的长度
** Input: 		  INT32U length	: 块的长度值			INT32U length	: the length of a block
** Output: 		  0:   正确    >0:   错误码		  		0:  right		>0:  error code
** Created by:    Ming Yuan Zheng 郑明远 
** Created Date:  2006-01-09 
**-------------------------------------------------------------------------------------------------------
** Modified by:
** Modified Date: 
**------------------------------------------------------------------------------------------------------
********************************************************************************************************/
INT8U SD_SetBlockLen(INT16U RCA, INT32U length)
{
	INT8U response[6],ret;
	
	ret = SD_SelectCard(RCA);					/* CMD7, 进入传输状态 */
    if (ret != SD_NO_ERR)
    	return ret;			
         												
    ret = SD_SendCommand(CMD16, length, CMD16_R, response);
    if (ret != SD_NO_ERR)
 		return ret;									/* 设置块的长度为length失败 set the length of block to length fail */

	ret = SD_JudgeResult(&response[1]);			/* 返回执行结果 return perform result */	
	if  (ret != SD_NO_ERR)
		return ret;
	
	return (SD_DeSelectCard());

	//return (SD_JudgeResult(&response[1]));			/* 返回执行结果 return perform result */	
}


/*********************************************************************************************************
** Function name: SD_ReadSingleBlock
** Descriptions:  read single block command
**                读单块命令
** Input: 		  INT32U blockaddr: 块地址				INT32U blockaddr: block address
** Output: 		  0:   正确    >0:   错误码		  		0:  right	>0:  error code
** Created by:    MingYuan Zheng 郑明远 
** Created Date:  2006-01-09 
**-------------------------------------------------------------------------------------------------------
** Modified by:
** Modified Date: 
**------------------------------------------------------------------------------------------------------
********************************************************************************************************/
INT8U SD_ReadSingleBlock(INT32U blockaddr)
{
	return (SD_BlockCommand(CMD17, CMD17_R, blockaddr)); /* 读单块命令 command that read single block */
}