通过串口输出打印信息

• 添加log.c

  #include "log.h"
  
  #if LOG_ENABLE
  
  #include "n32l43x.h"
  #include "n32l43x_gpio.h"
  #include "n32l43x_usart.h"
  #include "n32l43x_rcc.h"
  
  #define LOG_USARTx      USART1
  #define LOG_PERIPH      RCC_APB2_PERIPH_USART1
  #define LOG_GPIO        GPIOA
  #define LOG_PERIPH_GPIO RCC_APB2_PERIPH_GPIOA
  #define LOG_TX_PIN      GPIO_PIN_9
  #define LOG_RX_PIN      GPIO_PIN_10
  
  void log_init(void)
  {
      GPIO_InitType GPIO_InitStructure;
      USART_InitType USART_InitStructure;
  
      GPIO_InitStruct(&GPIO_InitStructure);
  
      RCC_EnableAPB2PeriphClk(RCC_APB2_PERIPH_AFIO | LOG_PERIPH_GPIO, ENABLE);
  
      RCC_EnableAPB2PeriphClk(LOG_PERIPH, ENABLE);
  
  
      GPIO_InitStructure.Pin        = LOG_TX_PIN;
      GPIO_InitStructure.GPIO_Mode  = GPIO_Mode_AF_PP;
      GPIO_InitStructure.GPIO_Slew_Rate = GPIO_Slew_Rate_High;
  		GPIO_InitStructure.GPIO_Alternate = GPIO_AF4_USART1;
      GPIO_InitPeripheral(LOG_GPIO, &GPIO_InitStructure);
  
      GPIO_InitStructure.Pin       = LOG_RX_PIN;
      GPIO_InitStructure.GPIO_Pull = GPIO_Pull_Up;
  	  GPIO_InitStructure.GPIO_Alternate = GPIO_AF4_USART1;
      GPIO_InitPeripheral(LOG_GPIO, &GPIO_InitStructure);
  
      USART_InitStructure.BaudRate            = 115200;
      USART_InitStructure.WordLength          = USART_WL_8B;
      USART_InitStructure.StopBits            = USART_STPB_1;
      USART_InitStructure.Parity              = USART_PE_NO;
      USART_InitStructure.HardwareFlowControl = USART_HFCTRL_NONE;
      USART_InitStructure.Mode                = USART_MODE_RX | USART_MODE_TX;
  
      // init uart
      USART_Init(LOG_USARTx, &USART_InitStructure);
  
      // enable uart
      USART_Enable(LOG_USARTx, ENABLE);
  }
  
  
  int fputc(int ch, FILE* f)
  {
      USART_SendData(LOG_USARTx, (uint8_t)ch);
      while (USART_GetFlagStatus(LOG_USARTx, USART_FLAG_TXDE) == RESET)
          ;
  
      return (ch);
  }
  
  #ifdef USE_FULL_ASSERT
  
  __WEAK void assert_failed(const uint8_t* expr, const uint8_t* file, uint32_t line)
  {
      log_error("assertion failed: `%s` at %s:%d", expr, file, line);
      while (1)
      {
      }
  }
  #endif // USE_FULL_ASSERT
  
  #endif // LOG_ENABLE
  #endif // LOG_ENABLE
  

  #endif // LOG_ENABLE
• 添加log.h

  #ifndef __LOG_H__
  #define __LOG_H__
  
  #ifndef LOG_ENABLE
  #define LOG_ENABLE 1
  #endif
  
  #if LOG_ENABLE
  
  #include 
  
  #define LOG_NONE    0
  #define LOG_ERROR   10
  #define LOG_WARNING 20
  #define LOG_INFO    30
  #define LOG_DEBUG   40
  
  #ifndef LOG_LEVEL
  #define LOG_LEVEL LOG_DEBUG
  #endif
  
  #if LOG_LEVEL >= LOG_INFO
  #define log_info(...) printf(__VA_ARGS__)
  #else
  #define log_info(...)
  #endif
  
  #if LOG_LEVEL >= LOG_ERROR
  #define log_error(...) printf(__VA_ARGS__)
  #else
  #define log_error(...)
  #endif
  
  #if LOG_LEVEL >= LOG_WARNING
  #define log_warning(...) printf(__VA_ARGS__)
  #else
  #define log_warning(...)
  #endif
  
  #if LOG_LEVEL >= LOG_DEBUG
  #define log_debug(...) printf(__VA_ARGS__)
  #else
  #define log_debug(...)
  #endif
  
  void log_init(void);
  
  #else /* !LOG_ENABLE */
  
  #define log_info(...)
  #define log_warning(...)
  #define log_error(...)
  #define log_debug(...)
  #define log_init()
  
  #endif
  
  #define log_func() log_debug("call %s [%d]\\r\\n", __FUNCTION__,__LINE__)
  
  #endif /* __LOG_H__ */
  #endif /* __LOG_H__ */
  

  #endif /* __LOG_H__ */
• man调用

  int main(void)
  {
      log_init();
  
      log_func();
  	//assert_param(0);
      while (1)
      {
  
      }
  }
  }
  

  }

异常处理

• 若无法正常打印信息，则查看keil5配置，需要 打开use microLIB

  
  审核编辑：汤梓红