C++ (Cpp) SD_CS_ENABLE Examples

Example #1

File: diskio.c Project: dodocat/stm32_Demo_CAMERA

DRESULT disk_ioctl (
	BYTE drv,		/* Physical drive nmuber (0..) */
	BYTE ctrl,		/* Control code */
	void *buff		/* Buffer to send/receive control data */
)
{
    DRESULT res;


    if (drv)
    {    
        return RES_PARERR;  //仅支持单磁盘操作，否则返回参数错误
    }
    
    //FATFS目前版本仅需处理CTRL_SYNC，GET_SECTOR_COUNT，GET_BLOCK_SIZ三个命令
    switch(ctrl)
    {
    case CTRL_SYNC:
        SD_CS_ENABLE();
        if(SD_WaitReady()==0)
        {
            res = RES_OK;
        }
        else
        {
            res = RES_ERROR;
        }
        SD_CS_DISABLE();
        break;
        
    case GET_BLOCK_SIZE:
        *(WORD*)buff = 512;
        res = RES_OK;
        break;

    case GET_SECTOR_COUNT:
        *(DWORD*)buff = SD_GetCapacity();
        res = RES_OK;
        break;
    default:
        res = RES_PARERR;
        break;
    }

    return res;
}

Example #2

File: diskio.c Project: north-sj/OLED-STM32

DRESULT disk_ioctl (BYTE drv,BYTE ctrl,void* buff)//哪个盘，控制命令（0刷新缓存，3获取块大小，1获取磁盘容量），块大小和磁盘容量存放的指针
{
    DRESULT res;
    if (drv)
    {    
        return RES_PARERR;  //仅支持单磁盘操作，否则返回参数错误
    }
    
    //FATFS目前版本仅需处理CTRL_SYNC，GET_SECTOR_COUNT，GET_BLOCK_SIZ三个命令
    switch(ctrl)
    {
    case CTRL_SYNC:	//刷新磁盘缓存
   
		SD_CS_ENABLE();
        if(SD_WaitReady()==0)
        {
            res = RES_OK;
        }
        else
        {
            res = RES_ERROR;
        }
       
		SD_CS_DISABLE();
        break;
        
    case GET_BLOCK_SIZE://获取块的大小
        *(WORD*)buff = 512;
        res = RES_OK;
        break;

    case GET_SECTOR_COUNT: //获取磁盘的容量
        *(DWORD*)buff = SD_GetCapacity();
        res = RES_OK;
        break;
    default:
        res = RES_PARERR;
        break;
    }

    return res;
}