C语言中元素访问之数组

　　今天在写STM32程序时，出现了一个小问题，现在记录下来，应该说是自己的C语言基本功不行。加油吧

首先，发送函数的定义：

1 void rs485_put_bytes(uint8 *buf,uint32 len)  

所访问的结构体的定义：

typedef struct
{
  uint32_t StdId;  /*!< Specifies the standard identifier.
                        This parameter can be a value between 0 to 0x7FF. */
  uint32_t ExtId;  /*!< Specifies the extended identifier.
                        This parameter can be a value between 0 to 0x1FFFFFFF. */
  uint8_t IDE;     /*!< Specifies the type of identifier for the message that will be received.
                        This parameter can be a value of @ref CAN_identifier_type */
  uint8_t RTR;     /*!< Specifies the type of frame for the received message.
                        This parameter can be a value of @ref CAN_remote_transmission_request */
  uint8_t DLC;     /*!< Specifies the length of the frame that will be received.
                        This parameter can be a value between 0 to 8 */
  uint8_t Data[8]; /*!< Contains the data to be received. It ranges from 0 to 0xFF. */

  uint8_t FMI;     /*!< Specifies the index of the filter the message stored in the mailbox passes through.
                        This parameter can be a value between 0 to 0xFF */
} CanRxMsg;

定义一个结构体变量：

1 CanRxMsg RxMessage;

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