typedef struct
{
    union {
        __IO uint32_t MASKED_ACCESS[4096];/*!< Offset: 0x0000 to 0x3FFC Port data Register for pins     */
                                          /* PIOn_0 to PIOn_11 (R/W)                                    */
        struct {
             uint32_t RESERVED0[4095];
             __IO uint32_t DATA;          /*!< Offset: 0x3FFC Port data Register (R/W)                  */
        };
    };
       uint32_t RESERVED1[4096];
    __IO uint32_t DIR;                    /*!< Offset: 0x8000 Data direction Register (R/W)             */
    __IO uint32_t IS;                     /*!< Offset: 0x8004 Interrupt sense Register (R/W)            */
    __IO uint32_t IBE;                    /*!< Offset: 0x8008 Interrupt both edges Register (R/W)       */
    __IO uint32_t IEV;                    /*!< Offset: 0x800C Interrupt event Register  (R/W)           */
    __IO uint32_t IE;                     /*!< Offset: 0x8010 Interrupt mask Register (R/W)             */
    __IO uint32_t RIS;                    /*!< Offset: 0x8014 Raw interrupt status Register (R/ )       */
    __IO uint32_t MIS;                    /*!< Offset: 0x8018 Masked interrupt status Register (R/ )    */
    __IO uint32_t IC;                     /*!< Offset: 0x801C Interrupt clear Register (R/W)            */
} LPC_GPIO_TypeDef;     定义了头文件以后 然后再写程序的时候 写成了 “ LPC_GPIO2->DATA |=  BEEP    ”等等 好像不符合我们以前学结构体的规范呢  结构体不是……。……这个格式么   大放假的 哈哈 祝大家节日快乐  谢谢啦 此帖出自小平头技术问答