[参考译文] CC3235SF：如何使用 sl_FsDel ()函数删除文件？

我收到无效令牌错误、但我正在尝试使用主机令牌删除文件。

static uint32_t appDeviceGetFileInfo(unsigned char *fileName)
{
   /* Holds struct for file system. */
   SlFsFileInfo_t fileInfo = {0};
   /* Holds return value. */
   int16_t RetVal = -1;
   /* Get information of a specific file. */
   RetVal = sl_FsGetInfo(fileName, g_tokens[SL_FS_TOKEN_MASTER], &fileInfo);
   /* Check if tokens from file system are acquired. */
   if(0 == RetVal)
   {
       /* Copy tokens. */
       g_tokens[SL_FS_TOKEN_READ_ONLY] = fileInfo.Token[SL_FS_TOKEN_READ_ONLY];
       g_tokens[SL_FS_TOKEN_WRITE_ONLY] = fileInfo.Token[SL_FS_TOKEN_WRITE_ONLY];
       g_tokens[SL_FS_TOKEN_WRITE_READ] = fileInfo.Token[SL_FS_TOKEN_WRITE_READ];
   }
   /* Return status value. */
   return RetVal;
}

/*!
 *  @brief  Function to actually write file to the file system.
 *
 *  @param  fileName    The pointer to the file name.
 *
 *  @param  p_buf       The pointer to buffer containing data to
 *                      be written to the file system.
 *
 *  @param  len         The number of bytes in the buffer that should
 *                      be written to the file system.
 *
 *  @return Returns 0 if write was successful, otherwise the error code.
 *
 */
int32_t appDeviceWriteFile(unsigned char *fileName, uint8_t *p_buf, size_t len)
{
    /* Holds file system handle. */
    int32_t fileHandle = -1;
    /* Holds return value. */
    int32_t retVal = -1;
    /* Create a secure file if not exists and open it for write. */
    fileHandle =  sl_FsOpen(fileName, \
                            SL_FS_CREATE | SL_FS_OVERWRITE | \
                            SL_FS_CREATE_MAX_SIZE( len ) | \
                            SL_FS_CREATE_SECURE | SL_FS_CREATE_PUBLIC_WRITE | \
                            SL_FS_CREATE_NOSIGNATURE, (_u32 *)&g_tokens[SL_FS_TOKEN_MASTER]);
    /* Check if handle has a valid value. */
    if(0 > fileHandle)
    {
        /* Error happened, abort. */
        sl_FsClose(fileHandle, NULL, (uint8_t *)'A', 1);
        /* Print error. */
        ERR_PRINT(ERROR_FILE_SYSTEM_OP);
    }
    else
    {
        /* Preferred in secure file that the Offset and
         * the length will be aligned to 16 bytes. */
        retVal = sl_FsWrite(fileHandle, 0, p_buf, len);
        /* Check for an error. */
        if(0 > retVal)
        {
            /* Error happened, abort. */
            sl_FsClose(fileHandle, NULL, (uint8_t *)'A', 1);
            /* Print error. */
            ERR_PRINT(ERROR_FILE_SYSTEM_OP);
        }
        /* Close file in storage device. */
        retVal = sl_FsClose(fileHandle, NULL, NULL , 0);
        /* Check for an error. */
        if(0 > retVal)
        {
            /* Error happened, abort. */
            sl_FsClose(fileHandle, NULL, (uint8_t *)'A', 1);
            /* Print error. */
            ERR_PRINT(ERROR_FILE_SYSTEM_OP);
        }
        /* Get tokens for the given file. */
        ERR_CHECK(appDeviceGetFileInfo(fileName), ERROR_NO_ERROR);
    }
    /* Return result. */
    return retVal;
}

int32_t appDeviceDeleteFile(unsigned char *fileName, size_t len)
{
    /* Holds file system handle. */
    int32_t fileHandle = -1;
    /* Holds return value. */
    int32_t retVal = -1;
    /* Create a secure file if not exists and open it for write. */
    fileHandle =  sl_FsOpen(fileName, \
                            SL_FS_CREATE | SL_FS_OVERWRITE | \
                            SL_FS_CREATE_MAX_SIZE( len ) | \
                            SL_FS_CREATE_SECURE | SL_FS_CREATE_PUBLIC_WRITE | \
                            SL_FS_CREATE_NOSIGNATURE, (_u32 *)&g_tokens[SL_FS_TOKEN_MASTER]);
    /* Check if handle has a valid value. */
    if(0 > fileHandle)
    {
        /* Error happened, abort. */
        sl_FsClose(fileHandle, NULL, (uint8_t *)'A', 1);
        /* Print error. */
        ERR_PRINT(ERROR_FILE_SYSTEM_OP);
    }
    else
    {
        sl_FsClose(fileHandle, NULL, (uint8_t *)'A', 1);
        ERR_CHECK(appDeviceGetFileInfo(fileName), ERROR_NO_ERROR);
        /* Delete the file. */
        retVal = sl_FsDel(fileName, g_tokens[SL_FS_TOKEN_MASTER]);
        /* Check for an error. */
        if(0 > retVal)
        {
            /* Error happened, abort. */
            sl_FsClose(fileHandle, NULL, (uint8_t *)'A', 1);
            /* Print error. */
            ERR_PRINT(ERROR_FILE_SYSTEM_OP);
        }
        /* Close file in storage device. */
        retVal = sl_FsClose(fileHandle, NULL, NULL , 0);
        /* Check for an error. */
        if(0 > retVal)
        {
            /* Error happened, abort. */
            sl_FsClose(fileHandle, NULL, (uint8_t *)'A', 1);
            /* Print error. */
            ERR_PRINT(ERROR_FILE_SYSTEM_OP);
        }
        /* Get tokens for the given file. */
        ERR_CHECK(appDeviceGetFileInfo(fileName), ERROR_NO_ERROR);
    }
    return retVal;
}

您好！

感谢您的关注、明天我会跟进。

此致！

Rogelio