STM32库USART_ITConfig的坑

USART_ITConfig只能使用一个中断标志！

看看中断参数的定义：

#define USART_IT_PE                          ((uint16_t)0x0028)
#define USART_IT_TXE                         ((uint16_t)0x0727)
#define USART_IT_TC                          ((uint16_t)0x0626)
#define USART_IT_RXNE                        ((uint16_t)0x0525)
#define USART_IT_ORE_RX                      ((uint16_t)0x0325) /* In case interrupt is generated if the RXNEIE bit is set */
#define USART_IT_IDLE                        ((uint16_t)0x0424)
#define USART_IT_LBD                         ((uint16_t)0x0846)
#define USART_IT_CTS                         ((uint16_t)0x096A)
#define USART_IT_ERR                         ((uint16_t)0x0060)
#define USART_IT_ORE_ER                      ((uint16_t)0x0360) /* In case interrupt is generated if the EIE bit is set */
#define USART_IT_NE                          ((uint16_t)0x0260)
#define USART_IT_FE                          ((uint16_t)0x0160)

如果你一不小心使用了或运算施工图配置多个中断，而又没有打开断言开关的宏，恐怕你会痛苦一阵子了！

在stm32f4xx_conf.h中，打开标志并定义函数

#define USE_FULL_ASSERT    1

void assert_failed(uint8_t *file, uint32_t line);

/* Uncomment the line below to expanse the "assert_param" macro in the
   Standard Peripheral Library drivers code */
#define USE_FULL_ASSERT    1

/* Exported macro ------------------------------------------------------------*/
#ifdef  USE_FULL_ASSERT

/**
  * @brief  The assert_param macro is used for function's parameters check.
  * @param  expr: If expr is false, it calls assert_failed function
  *   which reports the name of the source file and the source
  *   line number of the call that failed.
  *   If expr is true, it returns no value.
  * @retval None
  */
#define assert_param(expr) ((expr) ? (void)0 : assert_failed((uint8_t *)__FILE__, __LINE__))
/* Exported functions ------------------------------------------------------- */
void assert_failed(uint8_t *file, uint32_t line);
#else
#define assert_param(expr) ((void)0)
#endif /* USE_FULL_ASSERT */

void assert_failed(uint8_t *file, uint32_t line);

void assert_failed(uint8_t *file, uint32_t line);