CUBE里配置成异步模式，设置波特率，打开中断（先配置LCD再配置串口）：

 

串口发送

main.c

#include "string.h"

char temp[20];
sprintf(temp,"Hello World\r\n");
HAL_UART_Transmit(&huart1,(uint8_t *)temp,strlen(temp),50);

串口接收

interrupt.c

#include "usart.h"

char rxdata[30];
uint8_t rxdat;
uint8_t rx_index;
void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)
{rxdata[rx_index++] = rxdat;HAL_UART_Receive_IT(&huart1, &rxdat, 1);
}

main.c

extern char rxdata[30];
extern uint8_t rxdat;
extern uint8_t rx_index;char car_type[5];
char car_data[5];
char car_time[13];

 注：sscanf()里的1s不能去掉，1代表数据的长度为1

void Uart_RX_Pro(void)
{if(rx_index > 0){if(rx_index == 5){sscanf(rxdata,"%1s:%1s:%1s",car_type,car_data,car_time);//1s中的1不能去掉，因为此处演示的数为1:2:3}else{char temp[20];sprintf(temp,"Error");HAL_UART_Transmit(&huart1,(uint8_t *)temp,strlen(temp),50);}rx_index = 0;memset(rxdata,0,30);}
}

HAL_UART_Receive_IT(&huart1, &rxdat, 1);//初始化运行时需要进去一次

if(rx_index > 0)
{int temp = rx_index;HAL_Delay(1);if(temp == rx_index)Uart_RX_Pro();
}
char text[30];
sprintf(text,"car_type = %s   ",car_type);
LCD_DisplayStringLine(Line0, (u8 *)text);
sprintf(text,"car_dat = %s   ",car_data);
LCD_DisplayStringLine(Line4, (u8 *)text);
sprintf(text,"car_time = %s   ",car_time);
LCD_DisplayStringLine(Line9, (u8 *)text);

串口接收最终实现功能：串口发送a:b:c时屏幕会显示对应的数字，若不是这5个字符串口则会接收到Error。