라즈베리파이 LED를 Button으로 켜기

Posted on: 2020년 04월 27일 2020년 04월 27일
Categories: 강의자료, 라즈베리파이

개발환경
1. CNDI사의 라즈베리파이 모듈 사용
2. Digital Push Button Brick
Button Switch Brick :
1. 누르는 동작을 감지하는 스위치
라즈베리파이와 연결
1. CNDI사의 Button Switch Brick
  1. S : GPIO 17
  2. V : VCC 5V
  3. G : GND
2. CNDI사의 Octopus 5mm LED Brick OBLED – Red
  1. S : GPIO 04
  2. V : VCC 5V
  3. G : GND

소스(button_switch.py) : 스위치가 눌리면(LOW) “Switch Detected..”을 출력

# !/usr/bin/env python
# coding:utf-8
import RPi.GPIO as gpio
import time
import sys
import warnings
warnings.filterwarnings('ignore')

SW = 17

if __name__ == '__main__': # Program start from here
    gpio.setmode(gpio.BCM)

    gpio.setup(SW, gpio.IN)

    try:
        while True:
            nVal = gpio.input(SW)
            if nVal == False: #gpio.LOW: #0:
                print("Switch Detected..")
            time.sleep(1)
    except KeyboardInterrupt: # When 'Ctrl+C' is pressed, the child program destroy() will be executed.
        gpio.cleanup() # Release resource
        sys.exit()

# !/usr/bin/env python

# coding:utf-8

import RPi.GPIO as gpio

import time

import sys

import warnings

warnings.filterwarnings('ignore')

SW = 17

if __name__ == '__main__': # Program start from here

gpio.setmode(gpio.BCM)

gpio.setup(SW, gpio.IN)

try:

while True:

nVal = gpio.input(SW)

if nVal == False: #gpio.LOW: #0:

print("Switch Detected..")

time.sleep(1)

except KeyboardInterrupt: # When 'Ctrl+C' is pressed, the child program destroy() will be executed.

gpio.cleanup() # Release resource

sys.exit()

소스(led_sw.py) : 스위치가 눌리면(LOW) LED가 켜지고 놓으면 꺼짐

# !/usr/bin/env python
# coding:utf-8
import RPi.GPIO as gpio
import time
import sys
import warnings
warnings.filterwarnings('ignore')

SW = 17
LED = 4


if __name__ == '__main__': # Program start from here
    gpio.setmode(gpio.BCM)

    gpio.setup(SW, gpio.IN)
    gpio.setup(LED, gpio.OUT, initial=gpio.LOW)

    try:
        while True:
            nVal = gpio.input(SW)
            if nVal == False: #gpio.LOW: #0:
                gpio.output(LED, gpio.HIGH)
                #print("Switch Detected..")
            else:
                gpio.output(LED, gpio.LOW)
    except KeyboardInterrupt: # When 'Ctrl+C' is pressed, the child program destroy() will be executed.
        gpio.cleanup() # Release resource
        sys.exit()

# !/usr/bin/env python

# coding:utf-8

import RPi.GPIO as gpio

import time

import sys

import warnings

warnings.filterwarnings('ignore')

SW = 17

LED = 4

if __name__ == '__main__': # Program start from here

gpio.setmode(gpio.BCM)

gpio.setup(SW, gpio.IN)

gpio.setup(LED, gpio.OUT, initial=gpio.LOW)

try:

while True:

nVal = gpio.input(SW)

if nVal == False: #gpio.LOW: #0:

gpio.output(LED, gpio.HIGH)

#print("Switch Detected..")

else:

gpio.output(LED, gpio.LOW)

except KeyboardInterrupt: # When 'Ctrl+C' is pressed, the child program destroy() will be executed.

gpio.cleanup() # Release resource

sys.exit()

소스(led_sw_interrupt.py) : 스위치가 눌리면(LOW) LED가 켜지고 놓으면 꺼짐(인터럽트 사용)

# !/usr/bin/env python
# coding:utf-8
import RPi.GPIO as gpio
import time
import sys
import warnings
warnings.filterwarnings('ignore')

SW = 7  #17
LED = 5 #4


def push_callback(channel):
    if gpio.input(SW) == gpio.LOW:
        gpio.output(LED, gpio.HIGH)
    else:
        gpio.output(LED, gpio.LOW)


gpio.setmode(gpio.BCM)
gpio.setup(SW, gpio.IN)
gpio.setup(LED, gpio.OUT, initial=gpio.LOW)

gpio.add_event_detect(SW, gpio.BOTH, callback=push_callback)
# gpio.FALLING or gpio_RISING or gpio.BOTH


try:
    while True:
        time.sleep(10)
except KeyboardInterrupt: # When 'Ctrl+C' is pressed, the child program destroy() will be executed.
    gpio.cleanup() # Release resource
    sys.exit()

gpio.remove_event_detect(SW)

# !/usr/bin/env python

# coding:utf-8

import RPi.GPIO as gpio

import time

import sys

import warnings

warnings.filterwarnings('ignore')

SW = 7 #17

LED = 5 #4

def push_callback(channel):

if gpio.input(SW) == gpio.LOW:

gpio.output(LED, gpio.HIGH)

else:

gpio.output(LED, gpio.LOW)

gpio.setmode(gpio.BCM)

gpio.setup(SW, gpio.IN)

gpio.setup(LED, gpio.OUT, initial=gpio.LOW)

gpio.add_event_detect(SW, gpio.BOTH, callback=push_callback)

# gpio.FALLING or gpio_RISING or gpio.BOTH

try:

while True:

time.sleep(10)

except KeyboardInterrupt: # When 'Ctrl+C' is pressed, the child program destroy() will be executed.

gpio.cleanup() # Release resource

sys.exit()

gpio.remove_event_detect(SW)

whan0623

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