STM32F407 Discovery uart1串口通信

最新推荐文章于 2025-10-09 15:00:24 发布

原创

最新推荐文章于 2025-10-09 15:00:24 发布 · 1w 阅读

3 ·

CC 4.0 BY-SA版权

这篇博客介绍了如何在STM32F407 Discovery板上配置和使用UART1进行串口通信。通过设置GPIO、NVIC中断、USART初始化等步骤，实现串口发送和接收功能。示例代码包含USART配置函数和主函数中的关键操作，如波特率设置和中断启用。

#include "stm32f4_discovery.h"
#include <stdio.h>
 
#define LED1_ON     GPIO_SetBits(GPIOD,GPIO_Pin_12)
#define LED1_OFF	GPIO_ResetBits(GPIOD,GPIO_Pin_12)

#define LED2_ON     GPIO_SetBits(GPIOD,GPIO_Pin_13)
#define LED2_OFF	GPIO_ResetBits(GPIOD,GPIO_Pin_13)

extern uint8_t NbrOfDataToTransfer;
extern uint8_t NbrOfDataToRead;
extern __IO uint8_t TxCounter; 
extern __IO uint16_t RxCounter; 

void NVIC_Config(void);
void GPIO_Configuration(void);
void STM_EVAL_COMInit(void);
void USART_Configuration(int BaudRate);
void LED_Config(void);
void Delay(__IO uint32_t nCount);
 
int main(void)
{
  /* Configure the system clocks */
  NVIC_Config();                /* NVIC Configuration */
 
//GPIO_Configuration();         /* Configure the GPIOs */
  STM_EVAL_COMInit();  
  
  USART_Configuration(115200);        /* Configure the USART1 's mode */
                                /* Enable the EVAL_COM1 Transmit interrupt: this interrupt is generated when the 
                                   EVAL_COM1 transmit data register is empty */  

  USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);
  
  LED_Config();
  
  while (1)
  {
      Delay(0xfFFFFF); 
      Delay(0xfFFFFF); 
      printf("\n\rUSART Printf Example\n\r");
  }
}


void Delay(__IO uint32_t nCount)
{
  while(nCoun