reg

1、

/** GPIO - Register Layout Typedef */
typedef struct {
  __IO uint32_t DR;                                /**< GPIO data register, offset: 0x0 */
  __IO uint32_t GDIR;                              /**< GPIO direction register, offset: 0x4 */
  __I  uint32_t PSR;                               /**< GPIO pad status register, offset: 0x8 */
  __IO uint32_t ICR1;                              /**< GPIO interrupt configuration register1, offset: 0xC */
  __IO uint32_t ICR2;                              /**< GPIO interrupt configuration register2, offset: 0x10 */
  __IO uint32_t IMR;                               /**< GPIO interrupt mask register, offset: 0x14 */
  __IO uint32_t ISR;                               /**< GPIO interrupt status register, offset: 0x18 */
  __IO uint32_t EDGE_SEL;                          /**< GPIO edge select register, offset: 0x1C */
} GPIO_Type;

 

led
    /* 3、初始化GPIO,GPIO1_IO03设置为输出*/
    GPIO1->GDIR |= (1 << 3);     

    /* 4、设置GPIO1_IO03输出低电平，打开LED0*/
    GPIO1->DR &= ~(1 << 3);        
    GPIO1->DR |= (1<<3);    /* 关闭LED0 */
    
beep
    /* 3、初始化GPIO,GPIO5_IO01设置为输出 */
    GPIO5->GDIR |= (1 << 1);     

    /* 4、设置GPIO5_IO01输出高电平，关闭蜂鸣器 */
    GPIO5->DR |= (1 << 1);    
    
    GPIO5->DR &= ~(1 << 1);    /* 打开蜂鸣器 */

 

2、

/** EPIT - Register Layout Typedef */
typedef struct {
  __IO uint32_t CR;                                /**< Control register, offset: 0x0 */
  __IO uint32_t SR;                                /**< Status register, offset: 0x4 */
  __IO uint32_t LR;                                /**< Load register, offset: 0x8 */
  __IO uint32_t CMPR;                              /**< Compare register, offset: 0xC */
  __I  uint32_t CNR;                               /**< Counter register, offset: 0x10 */
} EPIT_Type;

3、

/** UART - Register Layout Typedef */
typedef struct {
  __I  uint32_t URXD;                              /**< UART Receiver Register, offset: 0x0 */
       uint8_t RESERVED_0[60];
  __IO uint32_t UTXD;                              /**< UART Transmitter Register, offset: 0x40 */
       uint8_t RESERVED_1[60];
  __IO uint32_t UCR1;                              /**< UART Control Register 1, offset: 0x80 */
  __IO uint32_t UCR2;                              /**< UART Control Register 2, offset: 0x84 */
  __IO uint32_t UCR3;                              /**< UART Control Register 3, offset: 0x88 */
  __IO uint32_t UCR4;                              /**< UART Control Register 4, offset: 0x8C */
  __IO uint32_t UFCR;                              /**< UART FIFO Control Register, offset: 0x90 */
  __IO uint32_t USR1;                              /**< UART Status Register 1, offset: 0x94 */
  __IO uint32_t USR2;                              /**< UART Status Register 2, offset: 0x98 */
  __IO uint32_t UESC;                              /**< UART Escape Character Register, offset: 0x9C */
  __IO uint32_t UTIM;                              /**< UART Escape Timer Register, offset: 0xA0 */
  __IO uint32_t UBIR;                              /**< UART BRM Incremental Register, offset: 0xA4 */
  __IO uint32_t UBMR;                              /**< UART BRM Modulator Register, offset: 0xA8 */
  __I  uint32_t UBRC;                              /**< UART Baud Rate Count Register, offset: 0xAC */
  __IO uint32_t ONEMS;                             /**< UART One Millisecond Register, offset: 0xB0 */
  __IO uint32_t UTS;                               /**< UART Test Register, offset: 0xB4 */
  __IO uint32_t UMCR;                              /**< UART RS-485 Mode Control Register, offset: 0xB8 */
} UART_Type;

4、

/** I2C - Register Layout Typedef */
typedef struct {
  __IO uint16_t IADR;                              /**< I2C Address Register, offset: 0x0 */
       uint8_t RESERVED_0[2];
  __IO uint16_t IFDR;                              /**< I2C Frequency Divider Register, offset: 0x4 */
       uint8_t RESERVED_1[2];
  __IO uint16_t I2CR;                              /**< I2C Control Register, offset: 0x8 */
       uint8_t RESERVED_2[2];
  __IO uint16_t I2SR;                              /**< I2C Status Register, offset: 0xC */
       uint8_t RESERVED_3[2];
  __IO uint16_t I2DR;                              /**< I2C Data I/O Register, offset: 0x10 */
} I2C_Type;

5、

/** ECSPI - Register Layout Typedef */
typedef struct {
  __I  uint32_t RXDATA;                            /**< Receive Data Register, offset: 0x0 */
  __O  uint32_t TXDATA;                            /**< Transmit Data Register, offset: 0x4 */
  __IO uint32_t CONREG;                            /**< Control Register, offset: 0x8 */
  __IO uint32_t CONFIGREG;                         /**< Config Register, offset: 0xC */
  __IO uint32_t INTREG;                            /**< Interrupt Control Register, offset: 0x10 */
  __IO uint32_t DMAREG;                            /**< DMA Control Register, offset: 0x14 */
  __IO uint32_t STATREG;                           /**< Status Register, offset: 0x18 */
  __IO uint32_t PERIODREG;                         /**< Sample Period Control Register, offset: 0x1C */
  __IO uint32_t TESTREG;                           /**< Test Control Register, offset: 0x20 */
       uint8_t RESERVED_0[28];
  __O  uint32_t MSGDATA;                           /**< Message Data Register, offset: 0x40 */
} ECSPI_Type;

 

二、

最后一个是IO几那后面设置的时候就是io多少

void led_init(void)
{
    /* 1、初始化IO复用 */
    IOMUXC_SetPinMux(IOMUXC_GPIO1_IO03_GPIO1_IO03,0);        /* 复用为GPIO1_IO03 */
    
    
    /* 2、、配置GPIO1_IO03的IO属性    
     *bit 16:0 HYS关闭
     *bit [15:14]: 00 默认下拉
     *bit [13]: 0 kepper功能
     *bit [12]: 1 pull/keeper使能
     *bit [11]: 0 关闭开路输出
     *bit [7:6]: 10 速度100Mhz
     *bit [5:3]: 110 R0/6驱动能力
     *bit [0]: 0 低转换率
     */
    IOMUXC_SetPinConfig(IOMUXC_GPIO1_IO03_GPIO1_IO03,0X10B0);
    
    /* 3、初始化GPIO,GPIO1_IO03设置为输出*/
    GPIO1->GDIR |= (1 << 3);     

    /* 4、设置GPIO1_IO03输出低电平，打开LED0*/
    GPIO1->DR &= ~(1 << 3);        
}