C語言結構體賦值的方法之宏定義

今天發現結構體賦值可以用宏定義的辦法來賦值

typedef struct {
  I2C_TypeDef           *port;          /**< Peripheral port */
  GPIO_Port_TypeDef     sclPort;        /**< SCL pin port number */
  uint8_t               sclPin;         /**< SCL pin number */
  GPIO_Port_TypeDef     sdaPort;        /**< SDA pin port number */
  uint8_t               sdaPin;         /**< SDA pin number */
#if defined(_SILICON_LABS_32B_SERIES_0)
  uint8_t               portLocation;   /**< Port location */
#elif defined(_SILICON_LABS_32B_SERIES_1)
  uint8_t               portLocationScl; /**< Port location of SCL signal */
  uint8_t               portLocationSda; /**< Port location of SDA signal */
#endif
  uint32_t              i2cRefFreq;     /**< I2C reference clock */
  uint32_t              i2cMaxFreq;     /**< I2C max bus frequency to use */
  I2C_ClockHLR_TypeDef  i2cClhr;        /**< Clock low/high ratio control */
} I2CSPM_Init_TypeDef;

#define I2CSPM_INIT_DEFAULT                                                    \
  { I2C0,                       /* Use I2C instance 0 */                       \
    gpioPortC,                  /* SCL port */                                 \
    5,                          /* SCL pin */                                  \
    gpioPortC,                  /* SDA port */                                 \
    4,                          /* SDA pin */                                  \
    0,                          /* Location */                                 \
    0,                          /* Use currently configured reference clock */ \
    I2C_FREQ_STANDARD_MAX,      /* Set to standard rate  */                    \
    i2cClockHLRStandard,        /* Set to use 4:4 low/high duty cycle */       \
  }

 

這樣定義后，結構體就可以這樣賦值

 I2CSPM_Init_TypeDef I2C_Init = I2CSPM_INIT_DEFAULT;