Enthernet Code Comments - Answer Overflow

Enthernet Code

•Created by Boss lady on 8/5/2024 in #firmware-and-baremetal

Setting Up HC-SR04 Ultrasonic Sensor and 16x2 LCD on BeagleBone Black

@Boss lady Adding to @RED HAT points, here's a sample script to help you get started: updating and installing Libraries

sudo apt-get update
sudo apt-get install python3-pip
pip3 install Adafruit_BBIO
pip3 install RPLCD

sudo apt-get update
sudo apt-get install python3-pip
pip3 install Adafruit_BBIO
pip3 install RPLCD

writing script

import Adafruit_BBIO.GPIO as GPIO
import time
from RPLCD.gpio import CharLCD

TRIG = "P9_12"
ECHO = "P9_15"
LCD_RS = "P8_11"
LCD_RW = "P8_12"
LCD_E = "P8_13"
LCD_D4 = "P8_14"
LCD_D5 = "P8_15"
LCD_D6 = "P8_16"
LCD_D7 = "P8_17"

GPIO.setup(TRIG, GPIO.OUT)
GPIO.setup(ECHO, GPIO.IN)
lcd = CharLCD(pin_rs=LCD_RS, pin_rw=LCD_RW, pin_e=LCD_E,
              pins_data=[LCD_D4, LCD_D5, LCD_D6, LCD_D7],
              numbering_mode=GPIO.BOARD)

def measure_distance():
    GPIO.output(TRIG, True)
    time.sleep(0.00001)
    GPIO.output(TRIG, False)
    
    while GPIO.input(ECHO) == 0:
        pulse_start = time.time()
    
    while GPIO.input(ECHO) == 1:
        pulse_end = time.time()
    
    pulse_duration = pulse_end - pulse_start
    distance = pulse_duration * 17150
    distance = round(distance, 2)
    
    return distance

try:
    while True:
        dist = measure_distance()
        lcd.clear()
        lcd.write_string("Distance: {} cm".format(dist))
        time.sleep(1)
except KeyboardInterrupt:
    GPIO.cleanup()

import Adafruit_BBIO.GPIO as GPIO
import time
from RPLCD.gpio import CharLCD

TRIG = "P9_12"
ECHO = "P9_15"
LCD_RS = "P8_11"
LCD_RW = "P8_12"
LCD_E = "P8_13"
LCD_D4 = "P8_14"
LCD_D5 = "P8_15"
LCD_D6 = "P8_16"
LCD_D7 = "P8_17"

GPIO.setup(TRIG, GPIO.OUT)
GPIO.setup(ECHO, GPIO.IN)
lcd = CharLCD(pin_rs=LCD_RS, pin_rw=LCD_RW, pin_e=LCD_E,
              pins_data=[LCD_D4, LCD_D5, LCD_D6, LCD_D7],
              numbering_mode=GPIO.BOARD)

def measure_distance():
    GPIO.output(TRIG, True)
    time.sleep(0.00001)
    GPIO.output(TRIG, False)
    
    while GPIO.input(ECHO) == 0:
        pulse_start = time.time()
    
    while GPIO.input(ECHO) == 1:
        pulse_end = time.time()
    
    pulse_duration = pulse_end - pulse_start
    distance = pulse_duration * 17150
    distance = round(distance, 2)
    
    return distance

try:
    while True:
        dist = measure_distance()
        lcd.clear()
        lcd.write_string("Distance: {} cm".format(dist))
        time.sleep(1)
except KeyboardInterrupt:
    GPIO.cleanup()

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