GPIO questions about edge

#23

According to this pinout:

https://wiki.radxa.com/Rock5/hardware/5b/gpio

Yes!
I only update the GPIO’s address for pins 16 and 18 on a previous answer…

#24

I’ve tested Callbacks for IRQ and it worked for me!

#25

could you send me the python script you used to test callbacks so I can test on my radxa5?
following is the script I am testing, I have a rain gauge hooked to pin 23. I didn’t bother with radxa file for pins, just changed the pin mapping file.
#!/usr/bin/python3
import time
import sys

import OPi.GPIO as GPIO
GPIO.setwarnings(False)
channel = 23
GPIO.setmode(GPIO.BOARD)
GPIO.setup(channel, GPIO.IN, pull_up_down=GPIO.PUD_DOWN)

rainTick = 0 # Count of the rain input trigger
interval = 5 # Set now to define scope of variable
rainTime = 0 # Use this to detect erroneous rain events

def raintrig(channel):
time.sleep(0.02) #added 05-12-2020 to see if helps error in rain waits 10ms
global rainTick
global rainTime
rainTick += 1
print(“in raintrig”, rainTick)

GPIO.add_event_detect(channel, GPIO.FALLING, callback=raintrig)
GPIO.add_event_callback(channel, raintrig)

while True:
print(‘Reading…’)
if GPIO.input(channel) == GPIO.LOW:
print(‘Pressed’)
else:
print(‘Released’)
time.sleep(2)

#26

You can try:

import time
import sys

import OPi.GPIO as GPIO

don’t turn off the warnings while you are testing.

GPIO.setwarnings(False)

channel = 23
GPIO.setmode(GPIO.BOARD)

Check if the "Pull down command is working, in my case, this doesn’t work. you manually need to put a resistor to reach this.)

GPIO.setup(channel, GPIO.IN, pull_up_down=GPIO.PUD_DOWN)

Clean the channel from previous configurations. (You must use this also at the end of your script.)

GPIO.cleanup()
time.sleep(1)
GPIO.remove_event(channel)

rainTick = 0 # Count of the rain input trigger
interval = 5 # Set now to define scope of variable
rainTime = 0 # Use this to detect erroneous rain events

def raintrig(channel):
time.sleep(0.02) #added 05-12-2020 to see if helps error in rain waits 10ms
global rainTick
global rainTime
rainTick += 1
print(“in raintrig”, rainTick)

GPIO.add_event_detect(channel, GPIO.FALLING, callback=raintrig)
GPIO.add_event_callback(channel, raintrig)

while True:
print(‘Reading…’)
if GPIO.input(channel) == GPIO.LOW:
print(‘Pressed’)
else:
print(‘Released’)
time.sleep(2)

#27

I put a 330 ohm resistor in the circuit. I added GPIO.cleanup(). Changed the warnings to true. I am running the script thru Thonny so doubt it matters.

Ran the script again with the changes and no difference
RPi
I have been running this basic script using RPi.GPIO on a raspberry for over 3 years. It is running right now. That is why this is so frustrating.

#28

Please send me the python script that you tested callback so I can test my here, Thanks

#29

Please check this snippet , I test it on a a radxa CM3 board.

Modify the required parameters.
Also, I made a mistake in my previous reply. You cannot GPIO.cleanup() after GPIO.setup() the pin. Sorry for that.
Check this out:

import time
import radxa.radxa_cm3_io
from OPi import GPIO as GPIO

GPIO.cleanup()
time.sleep(5)
GPIO.setmode(radxa.radxa_cm3_io.SBC)

pin = 19
pin2 = 15

i=0
def interrupt(var):
global i
i=i+1
print(f"event number {i}")
print(f"Event triggered by pin: {var}")

#GPIO.setwarnings(False)
try:

GPIO.setup(pin, GPIO.IN)
GPIO.remove_event_detect(pin)
GPIO.setup(pin2, GPIO.IN)
GPIO.remove_event_detect(pin2)
# time.sleep(5)
# print( GPIO.input(pin) )

GPIO.add_event_detect(pin, GPIO.FALLING, callback=interrupt)
GPIO.add_event_detect(pin2, GPIO.FALLING, callback=interrupt)
# 
while True:
    print( f"Pin number { pin } is: { GPIO.input(pin) } " )
    print( f"Pin number { pin2 } is: { GPIO.input(pin2) } " )
    time.sleep(1)

except KeyboardInterrupt:
pass
finally:
GPIO.cleanup()

#30

radxa cm3 io uses a different cpu chip so I don’t know why the code would run on radxa5 just because it runs on cm3.

Also this can’t be python3 script as the indents all mostly wrong. Also I can’ run
import radxa.radxa_cm3_io on radxa5.

From Thonny:
Traceback (most recent call last):
File “/home/pi/OPiTest6.py”, line 22, in
GPIO.setup(pin, GPIO.IN)
File “/home/pi/.local/lib/python3.9/site-packages/OPi/GPIO.py”, line 477, in setup
sysfs.unexport(pin)
File “/home/pi/.local/lib/python3.9/site-packages/OPi/sysfs.py”, line 45, in unexport
fp.write(str(pin))
OSError: [Errno 22] Invalid argument

thanks for all your suggestions, hope someone with an radxa5 will pitch in with some answers.

#31

I just want you to know this thread was very helpfull for me. I think ill do my own library based on this one. I’ll try to collaborate to the repository and also plan to do this for the rock5C and maybe the zero3E that I’ve got.

Also I’ll try to post some more comprensive guide to GPIO.

This thread solved all my doubts on how to proceed. Thanks!

#32

Hello. I did a couple of updates on the library. Here you can find updated:

I send a pull request but it’s my very first time using github.