首页写一段-HC-SR04和lcd1602的超声波测距代码

写一段-HC-SR04和lcd1602的超声波测距代码

时间: 2025-02-22 16:31:15 浏览: 39

当然可以。HC-SR04是一种常用的超声波传感器模块，而LCD1602是一个16x2字符液晶显示屏。这里提供一个基本的Python示例，假设我们正在使用Arduino作为主控制器： ```python import RPi.GPIO as GPIO import time # HC-SR04设置 TRIG_PIN = 18 ECHO_PIN = 21 GPIO.setmode(GPIO.BCM) # 使用BCM编号模式 GPIO.setup(TRIG_PIN, GPIO.OUT) GPIO.setup(ECHO_PIN, GPIO.IN) # LCD1602设置 RS = 23 EN = 24 D4 = 25 D5 = 26 D6 = 19 D7 = 13 LCD_WIDTH = 16 LCD_LINE_1 = 0x80 LCD_LINE_2 = 0xC0 GPIO.setup(RS, GPIO.OUT) GPIO.setup(EN, GPIO.OUT) GPIO.setup(D4, GPIO.OUT) GPIO.setup(D5, GPIO.OUT) GPIO.setup(D6, GPIO.OUT) GPIO.setup(D7, GPIO.OUT) def send_cmd(cmd): GPIO.output(RS, GPIO.LOW) GPIO.output(EN, GPIO.HIGH) GPIO.output([D4, D5, D6, D7], cmd & 0xFF) time.sleep_us(3) GPIO.output(EN, GPIO.LOW) def send_data(data): GPIO.output(RS, GPIO.HIGH) GPIO.output(EN, GPIO.HIGH) GPIO.output([D4, D5, D6, D7], data & 0xFF) time.sleep_us(1) GPIO.output(EN, GPIO.LOW) def ultrasonic_distance(): GPIO.output(TRIG_PIN, False) time.sleep_us(2) GPIO.output(TRIG_PIN, True) time.sleep_us(10) GPIO.output(TRIG_PIN, False) while GPIO.input(ECHO_PIN) == 0: pulse_start_time = time.time() while GPIO.input(ECHO_PIN) == 1: pulse_end_time = time.time() pulse_duration = pulse_end_time - pulse_start_time distance_cm = (pulse_duration * 34300) / 2 return distance_cm def display_distance(distance_cm): send_cmd(LCD_LINE_1 | LCD_WIDTH) send_data(ord('U')) send_data(ord(':')) send_data(int(distance_cm)) send_data(ord(' ')) try: while True: distance_cm = ultrasonic_distance() if distance_cm < 200: # 距离太近，忽略测量结果 continue display_distance(distance_cm) time.sleep(1) # 每秒测量一次 except KeyboardInterrupt: GPIO.cleanup()

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