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void  FSDev_SD_Card_BSP_CmdDataWr (FS_QTY               unit_nbr,

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                                   FS_DEV_SD_CARD_CMD  *p_cmd,

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                                   void                *p_src,

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                                   FS_DEV_SD_CARD_ERR  *p_err);

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Called from
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fs_dev_sd_card_bsp.c
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FSDev_SD_Card_WrData()
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N/A
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1142698Write data following a command. Anchor11426991142699
Arguments
 Anchor11427001142700unit_nbr Anchor11427011142701
Unit number of SD/MMC card.
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p_cmd Anchor11427031142703
Pointer to command that was started.
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p_src Anchor11427051142705
Pointer to source buffer.
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p_erranchor11427071142707
Pointer to variable that will receive the return error code from this function:
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FS_DEV_SD_CARD_ERR_NONE
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No error.
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FS_DEV_SD_CARD_ERR_NO_CARD
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No card present.
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FS_DEV_SD_CARD_ERR_UNKNOWN
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Unknown or other error.
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FS_DEV_SD_CARD_ERR_WAIT_TIMEOUT
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Timeout in waiting for data.
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FS_DEV_SD_CARD_ERR_DATA_UNDERRUN
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Data underrun.
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FS_DEV_SD_CARD_ERR_DATA_CHKSUM
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Error in data checksum.
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FS_DEV_SD_CARD_ERR_DATA_START_BIT
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Data start bit error.
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class
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FS_DEV_SD_CARD_ERR_DATA
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Other data error.
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Returned Value
 Anchor11427251142725None. Anchor11427261142726
Notes/Warnings
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Example
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The implementation of FSDev_SD_Card_BSP_CmdDataWr() in Listing C-10 is  is targeted for the same host controller as the other listings in this chapter; for more information, see FSDev_SD_Card_BSP_CmdStart().anchor
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                                   FS_DEV_SD_CARD_CMD  *p_cmd,
 void *p_src,

                                   void                *p_src,
                                   FS_DEV_SD_CARD_ERR  *p_err)
 {

{
    CPU_INT16U  interrupt_status;

    CPU_INT16U  error_status;

    CPU_INT16U  timeout;
 timeout = 0u; /* Wait until data xfer compl. */ (1) interrupt_status = 

    timeout          = 0u;                        /* Wait until data xfer compl. */  (1)
    interrupt_status = REG_INTERRUPT_STATUS;
 while 

    while (DEF_BIT_IS_CLR(interrupt_status,BIT_INTERRUPT_STATUS_ERROR
 | 
 | 
                                           BIT_INTERRUPT_STATUS_TRANSFER_COMPLETE) == DEF_YES))
 {
 {
        timeout++;

        interrupt_status = REG_INTERRUPT_STATUS;
 if (timeout == 

        if (timeout == TIMEOUT_TRANSFER_MAX)
 {
 {
           *p_err = FS_DEV_SD_CARD_ERR_WAIT_TIMEOUT;
 return; } } /* Handle error. */ (2) if 

            return;
        }
    }
                                                  /* Handle error.              */  (2)
    if (DEF_BIT_IS_SET(interrupt_status, BIT_INTERRUPT_STATUS_ERROR) == DEF_YES)
 {
 {
        error_status = REG_ERROR_STATUS;
 if 

        if (DEF_BIT_IS_SET(error_status, REG_ERROR_STATUS_DATA_END_BIT) == DEF_YES)
 {
 {
           *p_err = FS_DEV_SD_CARD_ERR_DATA;
 } else if 

        } else if (DEF_BIT_IS_SET(error_status, REG_ERROR_STATUS_DATA_CRC) == DEF_YES)
 {
 {
           *p_err = FS_DEV_SD_CARD_ERR_DATA_CRC;
 } else if 

        } else if (DEF_BIT_IS_SET(error_status, REG_ERROR_STATUS_DATA_TIMEOUT) == DEF_YES)
 {
 {
           *p_err = FS_DEV_SD_CARD_ERR_DATA_TIMEOUT;
 } else {

        } else {
           *p_err = FS_DEV_SD_CARD_ERR_UNKONWN;
 }

        }
        REG_ERROR_STATUS     = error_status;

        REG_INTERRUPT_STATUS = interrupt_status;
 return; }

        return;
    }
   
   *p_err = FS_DEV_SD_CARD_ERR_NONE;
 (3) }
title
FSDev_SD_Card_BSP_CmdDataWr()
void  FSDev_SD_Card_BSP_CmdDataWr (FS_QTY               unit_nbr,
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                                                  (3)
}

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(1) Wait until data transfer completes or an error occurs. The wait loop (or wait on semaphore) SHOULD always have a timeout to avoid blocking the task in the case of an unforeseen hardware malfunction or a software flaw.
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(2) Check if an error occurred. The error status register is decoded to produce the actual error condition. That is not necessary, strictly, but error counters that accumulate within the generic driver based upon returned error values may be useful while debugging a port.
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(3) Return no error. The data has been transferred already from the memory buffer using DMA.