【stm32】hal库学习笔记-UART/USART串口通信（超详细！）

【stm32】hal库学习笔记-UART/USART串口通信

hal库驱动函数

CubeMX图形化配置

导入LCD.ioc

RTC设置

时钟树配置

设置LSE为RTC时钟源

USART设置

中断设置

程序编写

编写主函数

  /* USER CODE BEGIN 2 */
  lcd_init();
  lcd_show_str(10, 10, 16, "Demo12_1:USART1-CH340", RED);
  lcd_show_str(10, 30, 16, "Please connect board with PC", RED);
  lcd_show_str(10, 50, 16, "via MiniUSB line before power on", RED);
  uint8_t hello1[] = "Hello, blocking\n";
  HAL_UART_Transmit(&huart1, hello1, sizeof(hello1), 500);
  HAL_Delay(10);
  uint8_t hello2[] = "Hello, none blocking\n";
  HAL_UART_Transmit_IT(&huart1, hello2, sizeof(hello2));
  lcd_show_str(10, 90, 16, "Received command string is: ", RED);
  HAL_UART_Receive_IT(&huart1, rxBuffer, RX_CMD_LEN);
  /* USER CODE END 2 */

在rtc.c中重写回调函数

/* USER CODE BEGIN 1 */
void HAL_RTCEx_WakeUpTimerEventCallback(RTC_HandleTypeDef *hrtc) {
	RTC_TimeTypeDef sTime;
	RTC_DateTypeDef sDate;
	if (HAL_RTC_GetTime(hrtc, &sTime, RTC_FORMAT_BIN) == HAL_OK) {
		HAL_RTC_GetDate(hrtc, &sDate, RTC_FORMAT_BIN);
		uint8_t timeStr[20];
		sprintf(timeStr, "%2d:%2d:%2d\n", sTime.Hours, sTime.Minutes, sTime.Seconds);
		lcd_show_str(30, 70, 16, timeStr, BLACK);
		if (isUploadTime) {
			HAL_UART_Transmit(&huart1, timeStr, strlen(timeStr), 200);
		}
	}
}
/* USER CODE END 1 */

在usart.h文件中编写定义

/* USER CODE BEGIN Private defines */
#define RX_CMD_LEN 5
extern uint8_t rxBuffer[];
extern uint8_t isUploadTime;
/* USER CODE END Private defines */

编写usart.c

/* USER CODE BEGIN 0 */
#include "rtc.h"
#include "lcd.h"
#include 
uint8_t proBuffer[10] = "#S45;\n";
uint8_t rxBuffer[10] = "#H12;\n";
uint8_t rxCompleted = RESET;
uint8_t isUploadTime = 1;
/* USER CODE END 0 */

/* USER CODE BEGIN 1 */
void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart) {
	if (huart->Instance == USART1) {
		rxCompleted = SET;
		for (uint16_t i = 0; i  
实现效果