RPi.GPIO interrupt not calling function long enough

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So I'm trying to design an LCD screen to have a Menu and a bunch of different functions and its supposed to take 4 buttons. A select, a menu, and an up and down. Right now I'm just trying to work on the Menu button. I want it to always display the clock unless the menu button is pressed. But when I press the button it doesn't stay on screen for the 5 seconds it's supposed to. I have no idea why it wont either. I've looked up the RPi interrupt and followed it, but it still won't stay up. The "hi" appears for not even half a second. I'm also using the raspberry pi spy's LCD library which I can link if needed be. The only thing I did was modify some timing things to match those of my displays and added the abilty to add text to any of the four rows at once seeings that I have a 20x4 display. If someone could help me, it would be greatly appreciated.

Here's the code:

#!usr/bin/python3
import RPi.GPIO as GPIO
import time
import sys
sys.path.append('/home/pi/Downloads')
import lcd

GPIO.setwarnings(False)
GPIO.setmode(GPIO.BOARD)
#GPIO.setup(33, GPIO.IN, pull_up_down=GPIO.PUD_UP)
GPIO.setup(11, GPIO.IN, pull_up_down=GPIO.PUD_UP)
#GPIO.setup(13, GPIO.IN, pull_up_down=GPIO.PUD_UP)
#GPIO.setup(15, GPIO.IN, pull_up_down=GPIO.PUD_UP)


lcd.lcd_init()

def start():
 for x in range(0,8):
 lcd.lcd_byte(lcd.LCD_LINE_2, lcd.LCD_CMD)
 lcd.lcd_string("[}>----TestOS----<]", 1)
 time.sleep(0.1)
 lcd.lcd_byte(lcd.LCD_LINE_2, lcd.LCD_CMD)
 lcd.lcd_string("[<>---TestOS-----]", 1)
 time.sleep(0.1)
 lcd.lcd_byte(lcd.LCD_LINE_2, lcd.LCD_CMD)
 lcd.lcd_string("[-<>--TestOS-----]", 1)
 time.sleep(0.1)
 lcd.lcd_byte(lcd.LCD_LINE_2, lcd.LCD_CMD)
 lcd.lcd_string("[--<>-TestOS-----]", 1)
 time.sleep(0.1)
 lcd.lcd_byte(lcd.LCD_LINE_2, lcd.LCD_CMD)
 lcd.lcd_string("[---<>TestOS-----]", 1)
 time.sleep(0.1)
 lcd.lcd_byte(lcd.LCD_LINE_2, lcd.LCD_CMD)
 lcd.lcd_string("[----<TestOS>----]", 1)
 time.sleep(0.1)
 lcd.lcd_byte(lcd.LCD_LINE_2, lcd.LCD_CMD)
 lcd.lcd_string("[-----TestOS<>---]", 1)
 time.sleep(0.1)
 lcd.lcd_byte(lcd.LCD_LINE_2, lcd.LCD_CMD)
 lcd.lcd_string("[-----TestOS-<>--]", 1)
 time.sleep(0.1)
 lcd.lcd_byte(lcd.LCD_LINE_2, lcd.LCD_CMD)
 lcd.lcd_string("[-----TestOS--<>-]", 1)
 time.sleep(0.1)
 lcd.lcd_byte(lcd.LCD_LINE_2, lcd.LCD_CMD)
 lcd.lcd_string("[-----TestOS---<>"), 1)
 lcd.lcd_byte(lcd.LCD_LINE_3, lcd.LCD_CMD)
 lcd.lcd_string(time.strftime(">----TestOS----<]", 1)
 time.sleep(0.1)
 lcd.lcd_byte(lcd.LCD_LINE_2, lcd.LCD_CMD)
 lcd.lcd_string("[<>---TestOS-----]", 1)
 time.sleep(0.1)
 lcd.lcd_byte(lcd.LCD_LINE_2, lcd.LCD_CMD)
 lcd.lcd_string("[-<>--TestOS-----]", 1)
 time.sleep(0.1)
 lcd.lcd_byte(lcd.LCD_LINE_2, lcd.LCD_CMD)
 lcd.lcd_string("[--<>-TestOS-----]", 1)
 time.sleep(0.1)
 lcd.lcd_byte(lcd.LCD_LINE_2, lcd.LCD_CMD)
 lcd.lcd_string("[---<>TestOS-----]", 1)
 time.sleep(0.1)
 lcd.lcd_byte(lcd.LCD_LINE_2, lcd.LCD_CMD)
 lcd.lcd_string("[----<TestOS>----]", 1)
 time.sleep(0.1)
 lcd.lcd_byte(lcd.LCD_LINE_2, lcd.LCD_CMD)
 lcd.lcd_string("[-----TestOS<>---]", 1)
 time.sleep(0.1)
 lcd.lcd_byte(lcd.LCD_LINE_2, lcd.LCD_CMD)
 lcd.lcd_string("[-----TestOS-<>--]", 1)
 time.sleep(0.1)
 lcd.lcd_byte(lcd.LCD_LINE_2, lcd.LCD_CMD)
 lcd.lcd_string("[-----TestOS--<>-]", 1)
 time.sleep(0.1)
 lcd.lcd_byte(lcd.LCD_LINE_2, lcd.LCD_CMD)
 lcd.lcd_string("[-----TestOS---<>%I:%M %p >----TestOS----<]", 1)
 time.sleep(0.1)
 lcd.lcd_byte(lcd.LCD_LINE_2, lcd.LCD_CMD)
 lcd.lcd_string("[<>---TestOS-----]", 1)
 time.sleep(0.1)
 lcd.lcd_byte(lcd.LCD_LINE_2, lcd.LCD_CMD)
 lcd.lcd_string("[-<>--TestOS-----]", 1)
 time.sleep(0.1)
 lcd.lcd_byte(lcd.LCD_LINE_2, lcd.LCD_CMD)
 lcd.lcd_string("[--<>-TestOS-----]", 1)
 time.sleep(0.1)
 lcd.lcd_byte(lcd.LCD_LINE_2, lcd.LCD_CMD)
 lcd.lcd_string("[---<>TestOS-----]", 1)
 time.sleep(0.1)
 lcd.lcd_byte(lcd.LCD_LINE_2, lcd.LCD_CMD)
 lcd.lcd_string("[----<TestOS>----]", 1)
 time.sleep(0.1)
 lcd.lcd_byte(lcd.LCD_LINE_2, lcd.LCD_CMD)
 lcd.lcd_string("[-----TestOS<>---]", 1)
 time.sleep(0.1)
 lcd.lcd_byte(lcd.LCD_LINE_2, lcd.LCD_CMD)
 lcd.lcd_string("[-----TestOS-<>--]", 1)
 time.sleep(0.1)
 lcd.lcd_byte(lcd.LCD_LINE_2, lcd.LCD_CMD)
 lcd.lcd_string("[-----TestOS--<>-]", 1)
 time.sleep(0.1)
 lcd.lcd_byte(lcd.LCD_LINE_2, lcd.LCD_CMD)
 lcd.lcd_string("[-----TestOS---<>]", 1)
 time.sleep(0.1)


 lcd.lcd_init()

 for x in range(0,120):
 lcd.lcd_byte(0xFF,True)

 time.sleep(5)
 lcd.lcd_init()


def Menu():
 lcd.lcd_init()
 lcd.lcd_byte(lcd.LCD_LINE_1, lcd.LCD_CMD)
 lcd.lcd_string("hi", 1)
 lcd.lcd_byte(lcd.LCD_LINE_2, lcd.LCD_CMD)
 lcd.lcd_string("hi", 1)
 time.sleep(5)

def clock():
 lcd.lcd_byte(lcd.LCD_LINE_1, lcd.LCD_CMD)
 lcd.lcd_string("+------------------+", 1)
 lcd.lcd_byte(lcd.LCD_LINE_2, lcd.LCD_CMD)
 lcd.lcd_string(time.strftime(">----TestOS----<]", 1)
 time.sleep(0.1)
 lcd.lcd_byte(lcd.LCD_LINE_2, lcd.LCD_CMD)
 lcd.lcd_string("[<>---TestOS-----]", 1)
 time.sleep(0.1)
 lcd.lcd_byte(lcd.LCD_LINE_2, lcd.LCD_CMD)
 lcd.lcd_string("[-<>--TestOS-----]", 1)
 time.sleep(0.1)
 lcd.lcd_byte(lcd.LCD_LINE_2, lcd.LCD_CMD)
 lcd.lcd_string("[--<>-TestOS-----]", 1)
 time.sleep(0.1)
 lcd.lcd_byte(lcd.LCD_LINE_2, lcd.LCD_CMD)
 lcd.lcd_string("[---<>TestOS-----]", 1)
 time.sleep(0.1)
 lcd.lcd_byte(lcd.LCD_LINE_2, lcd.LCD_CMD)
 lcd.lcd_string("[----<TestOS>----]", 1)
 time.sleep(0.1)
 lcd.lcd_byte(lcd.LCD_LINE_2, lcd.LCD_CMD)
 lcd.lcd_string("[-----TestOS<>---]", 1)
 time.sleep(0.1)
 lcd.lcd_byte(lcd.LCD_LINE_2, lcd.LCD_CMD)
 lcd.lcd_string("[-----TestOS-<>--]", 1)
 time.sleep(0.1)
 lcd.lcd_byte(lcd.LCD_LINE_2, lcd.LCD_CMD)
 lcd.lcd_string("[-----TestOS--<>-]", 1)
 time.sleep(0.1)
 lcd.lcd_byte(lcd.LCD_LINE_2, lcd.LCD_CMD)
 lcd.lcd_string("[-----TestOS---<>improve this question

edited Nov 10 at 17:35

PGCodeRider

2,1611725

edited Nov 10 at 17:35

PGCodeRider

2,1611725

edited Nov 10 at 17:35

PGCodeRider

2,1611725

asked Nov 8 at 0:21

Charlie C

132

asked Nov 8 at 0:21

Charlie C

132

asked Nov 8 at 0:21

Charlie C

132

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up vote
1
down vote

Your method clock() which is running in infinite loop, always override text on display with time.

You must stop clock() method when Menu() function runs.

I added global variable menu pressed:

#!usr/bin/python3
import RPi.GPIO as GPIO
import time
import sys
sys.path.append('/home/pi/Downloads')
import lcd

GPIO.setwarnings(False)
GPIO.setmode(GPIO.BOARD)
#GPIO.setup(33, GPIO.IN, pull_up_down=GPIO.PUD_UP)
GPIO.setup(11, GPIO.IN, pull_up_down=GPIO.PUD_UP)
#GPIO.setup(13, GPIO.IN, pull_up_down=GPIO.PUD_UP)
#GPIO.setup(15, GPIO.IN, pull_up_down=GPIO.PUD_UP)

menupressed = False

lcd.lcd_init()

def start():
 for x in range(0,8):
 lcd.lcd_byte(lcd.LCD_LINE_2, lcd.LCD_CMD)
 lcd.lcd_string("[>----TestOS----<]", 1)
 time.sleep(0.1)
 lcd.lcd_byte(lcd.LCD_LINE_2, lcd.LCD_CMD)
 lcd.lcd_string("[<>---TestOS-----]", 1)
 time.sleep(0.1)
 lcd.lcd_byte(lcd.LCD_LINE_2, lcd.LCD_CMD)
 lcd.lcd_string("[-<>--TestOS-----]", 1)
 time.sleep(0.1)
 lcd.lcd_byte(lcd.LCD_LINE_2, lcd.LCD_CMD)
 lcd.lcd_string("[--<>-TestOS-----]", 1)
 time.sleep(0.1)
 lcd.lcd_byte(lcd.LCD_LINE_2, lcd.LCD_CMD)
 lcd.lcd_string("[---<>TestOS-----]", 1)
 time.sleep(0.1)
 lcd.lcd_byte(lcd.LCD_LINE_2, lcd.LCD_CMD)
 lcd.lcd_string("[----<TestOS>----]", 1)
 time.sleep(0.1)
 lcd.lcd_byte(lcd.LCD_LINE_2, lcd.LCD_CMD)
 lcd.lcd_string("[-----TestOS<>---]", 1)
 time.sleep(0.1)
 lcd.lcd_byte(lcd.LCD_LINE_2, lcd.LCD_CMD)
 lcd.lcd_string("[-----TestOS-<>--]", 1)
 time.sleep(0.1)
 lcd.lcd_byte(lcd.LCD_LINE_2, lcd.LCD_CMD)
 lcd.lcd_string("[-----TestOS--<>-]", 1)
 time.sleep(0.1)
 lcd.lcd_byte(lcd.LCD_LINE_2, lcd.LCD_CMD)
 lcd.lcd_string("[-----TestOS---<>

up vote
1
down vote

Your method clock() which is running in infinite loop, always override text on display with time.

You must stop clock() method when Menu() function runs.

I added global variable menu pressed:

#!usr/bin/python3
import RPi.GPIO as GPIO
import time
import sys
sys.path.append('/home/pi/Downloads')
import lcd

GPIO.setwarnings(False)
GPIO.setmode(GPIO.BOARD)
#GPIO.setup(33, GPIO.IN, pull_up_down=GPIO.PUD_UP)
GPIO.setup(11, GPIO.IN, pull_up_down=GPIO.PUD_UP)
#GPIO.setup(13, GPIO.IN, pull_up_down=GPIO.PUD_UP)
#GPIO.setup(15, GPIO.IN, pull_up_down=GPIO.PUD_UP)

menupressed = False

lcd.lcd_init()

def start():
 for x in range(0,8):
 lcd.lcd_byte(lcd.LCD_LINE_2, lcd.LCD_CMD)
 lcd.lcd_string("[>----TestOS----<]", 1)
 time.sleep(0.1)
 lcd.lcd_byte(lcd.LCD_LINE_2, lcd.LCD_CMD)
 lcd.lcd_string("[<>---TestOS-----]", 1)
 time.sleep(0.1)
 lcd.lcd_byte(lcd.LCD_LINE_2, lcd.LCD_CMD)
 lcd.lcd_string("[-<>--TestOS-----]", 1)
 time.sleep(0.1)
 lcd.lcd_byte(lcd.LCD_LINE_2, lcd.LCD_CMD)
 lcd.lcd_string("[--<>-TestOS-----]", 1)
 time.sleep(0.1)
 lcd.lcd_byte(lcd.LCD_LINE_2, lcd.LCD_CMD)
 lcd.lcd_string("[---<>TestOS-----]", 1)
 time.sleep(0.1)
 lcd.lcd_byte(lcd.LCD_LINE_2, lcd.LCD_CMD)
 lcd.lcd_string("[----<TestOS>----]", 1)
 time.sleep(0.1)
 lcd.lcd_byte(lcd.LCD_LINE_2, lcd.LCD_CMD)
 lcd.lcd_string("[-----TestOS<>---]", 1)
 time.sleep(0.1)
 lcd.lcd_byte(lcd.LCD_LINE_2, lcd.LCD_CMD)
 lcd.lcd_string("[-----TestOS-<>--]", 1)
 time.sleep(0.1)
 lcd.lcd_byte(lcd.LCD_LINE_2, lcd.LCD_CMD)
 lcd.lcd_string("[-----TestOS--<>-]", 1)
 time.sleep(0.1)
 lcd.lcd_byte(lcd.LCD_LINE_2, lcd.LCD_CMD)
 lcd.lcd_string("[-----TestOS---<>improve this answer

answered Nov 9 at 8:08

Koxo

694

So, now it does stay on the screen for the 5 seconds its supposed to but, now it calls it twice before going back to the clock. And I tried to figure it out but I dont have any clue why
– Charlie C
Nov 9 at 19:31

Does it run twice everytime? Did you try to increase bounce time? I have no other idea.
– Koxo
Nov 11 at 0:29

1

What type of LCD display are you using?
– Koxo
Nov 11 at 1:26

I tried the bouncetime and nothing changed. The site for the display is adafru.it/198
– Charlie C
Nov 12 at 0:05

I should have one at home. I will try this code when I will have more time.
– Koxo
Nov 15 at 12:13

add a comment >----TestOS----<]", 1)
time.sleep(0.1)
lcd.lcd_byte(lcd.LCD_LINE_2, lcd.LCD_CMD)
lcd.lcd_string("[<>---TestOS-----]", 1)
time.sleep(0.1)
lcd.lcd_byte(lcd.LCD_LINE_2, lcd.LCD_CMD)
lcd.lcd_string("[-<>--TestOS-----]", 1)
time.sleep(0.1)
lcd.lcd_byte(lcd.LCD_LINE_2, lcd.LCD_CMD)
lcd.lcd_string("[--<>-TestOS-----]", 1)
time.sleep(0.1)
lcd.lcd_byte(lcd.LCD_LINE_2, lcd.LCD_CMD)
lcd.lcd_string("[---<>TestOS-----]", 1)
time.sleep(0.1)
lcd.lcd_byte(lcd.LCD_LINE_2, lcd.LCD_CMD)
lcd.lcd_string("[----<TestOS>----]", 1)
time.sleep(0.1)
lcd.lcd_byte(lcd.LCD_LINE_2, lcd.LCD_CMD)
lcd.lcd_string("[-----TestOS<>---]", 1)
time.sleep(0.1)
lcd.lcd_byte(lcd.LCD_LINE_2, lcd.LCD_CMD)
lcd.lcd_string("[-----TestOS-<>--]", 1)
time.sleep(0.1)
lcd.lcd_byte(lcd.LCD_LINE_2, lcd.LCD_CMD)
lcd.lcd_string("[-----TestOS--<>-]", 1)
time.sleep(0.1)
lcd.lcd_byte(lcd.LCD_LINE_2, lcd.LCD_CMD)
lcd.lcd_string("[-----TestOS---<>%a, %b %d, %Y >----TestOS----<]", 1)
time.sleep(0.1)
lcd.lcd_byte(lcd.LCD_LINE_2, lcd.LCD_CMD)
lcd.lcd_string("[<>---TestOS-----]", 1)
time.sleep(0.1)
lcd.lcd_byte(lcd.LCD_LINE_2, lcd.LCD_CMD)
lcd.lcd_string("[-<>--TestOS-----]", 1)
time.sleep(0.1)
lcd.lcd_byte(lcd.LCD_LINE_2, lcd.LCD_CMD)
lcd.lcd_string("[--<>-TestOS-----]", 1)
time.sleep(0.1)
lcd.lcd_byte(lcd.LCD_LINE_2, lcd.LCD_CMD)
lcd.lcd_string("[---<>TestOS-----]", 1)
time.sleep(0.1)
lcd.lcd_byte(lcd.LCD_LINE_2, lcd.LCD_CMD)
lcd.lcd_string("[----<TestOS>----]", 1)
time.sleep(0.1)
lcd.lcd_byte(lcd.LCD_LINE_2, lcd.LCD_CMD)
lcd.lcd_string("[-----TestOS<>---]", 1)
time.sleep(0.1)
lcd.lcd_byte(lcd.LCD_LINE_2, lcd.LCD_CMD)
lcd.lcd_string("[-----TestOS-<>--]", 1)
time.sleep(0.1)
lcd.lcd_byte(lcd.LCD_LINE_2, lcd.LCD_CMD)
lcd.lcd_string("[-----TestOS--<>-]", 1)
time.sleep(0.1)
lcd.lcd_byte(lcd.LCD_LINE_2, lcd.LCD_CMD)
lcd.lcd_string("[-----TestOS---<>{]", 1)
time.sleep(0.1)

lcd.lcd_init()

for x in range(0,120):
lcd.lcd_byte(0xFF,True)

time.sleep(5)
lcd.lcd_init()

def Menu():
global menupressed
menupressed = True
lcd.lcd_init()
lcd.lcd_byte(lcd.LCD_LINE_1, lcd.LCD_CMD)
lcd.lcd_string("hi", 1)
lcd.lcd_byte(lcd.LCD_LINE_2, lcd.LCD_CMD)
lcd.lcd_string("hi", 1)
time.sleep(5)
menupressed = False

def clock():
if(menupressed):
return #when menu button is pressed, return - dont show nothing on display
lcd.lcd_byte(lcd.LCD_LINE_1, lcd.LCD_CMD)
lcd.lcd_string("+------------------+", 1)
lcd.lcd_byte(lcd.LCD_LINE_2, lcd.LCD_CMD)
lcd.lcd_string(time.strftime("|%I:%M %p |"), 1)
lcd.lcd_byte(lcd.LCD_LINE_3, lcd.LCD_CMD)
lcd.lcd_string(time.strftime("|%a, %b %d, %Y |"), 1)
lcd.lcd_byte(lcd.LCD_LINE_4, lcd.LCD_CMD)
lcd.lcd_string("+------------------+", 1)
time.sleep(1)
lcd.lcd_byte(lcd.LCD_LINE_1, lcd.LCD_CMD)
lcd.lcd_string("+------------------+", 1)
lcd.lcd_byte(lcd.LCD_LINE_2, lcd.LCD_CMD)
lcd.lcd_string(time.strftime("|%I %M %p |"), 1)
lcd.lcd_byte(lcd.LCD_LINE_3, lcd.LCD_CMD)
lcd.lcd_string(time.strftime("|%a, %b %d, %Y |"), 1)
lcd.lcd_byte(lcd.LCD_LINE_4, lcd.LCD_CMD)
lcd.lcd_string("+------------------+", 1)
time.sleep(1)

GPIO.add_event_detect(11, GPIO.FALLING, callback=Menu, bouncetime=100)

start()
try:
while True:
clock()

finally:
lcd.lcd_init()
lcd.GPIO.cleanup()
GPIO.cleanup()

Hope it was helpful

answered Nov 9 at 8:08

Koxo

694

answered Nov 9 at 8:08

Koxo

694

answered Nov 9 at 8:08

Koxo

694

answered Nov 9 at 8:08

Koxo

694

So, now it does stay on the screen for the 5 seconds its supposed to but, now it calls it twice before going back to the clock. And I tried to figure it out but I dont have any clue why
– Charlie C
Nov 9 at 19:31

Does it run twice everytime? Did you try to increase bounce time? I have no other idea.
– Koxo
Nov 11 at 0:29

1

What type of LCD display are you using?
– Koxo
Nov 11 at 1:26

I tried the bouncetime and nothing changed. The site for the display is adafru.it/198
– Charlie C
Nov 12 at 0:05

I should have one at home. I will try this code when I will have more time.
– Koxo
Nov 15 at 12:13

add a comment |

So, now it does stay on the screen for the 5 seconds its supposed to but, now it calls it twice before going back to the clock. And I tried to figure it out but I dont have any clue why
– Charlie C
Nov 9 at 19:31

Does it run twice everytime? Did you try to increase bounce time? I have no other idea.
– Koxo
Nov 11 at 0:29

1

What type of LCD display are you using?
– Koxo
Nov 11 at 1:26

I tried the bouncetime and nothing changed. The site for the display is adafru.it/198
– Charlie C
Nov 12 at 0:05

I should have one at home. I will try this code when I will have more time.
– Koxo
Nov 15 at 12:13

So, now it does stay on the screen for the 5 seconds its supposed to but, now it calls it twice before going back to the clock. And I tried to figure it out but I dont have any clue why
– Charlie C
Nov 9 at 19:31

Does it run twice everytime? Did you try to increase bounce time? I have no other idea.
– Koxo
Nov 11 at 0:29

What type of LCD display are you using?
– Koxo
Nov 11 at 1:26

I tried the bouncetime and nothing changed. The site for the display is adafru.it/198
– Charlie C
Nov 12 at 0:05

I should have one at home. I will try this code when I will have more time.
– Koxo
Nov 15 at 12:13

add a comment |

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