# GPIO interrupt

**URL:** <https://forums.developer.nvidia.com/t/gpio-interrupt/186345>\
**Category:** Jetson Nano\
**Tags:** gpio\
**Created:** [August 12, 2021, 1:25am UTC](https://forums.developer.nvidia.com/t/gpio-interrupt/186345 "2021-08-12T01:25:42Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![1346825367](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@1346825367](https://forums.developer.nvidia.com/u/1346825367)\
**Post date:** [August 12, 2021, 1:25am UTC](https://forums.developer.nvidia.com/t/gpio-interrupt/186345/1 "2021-08-12T01:25:42Z")

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I use gpio by Jetson GPIO Python library,the code is here

import Jetson.GPIO as GPIO  
import time

edge\_pin=15  
plus\_pin=31

def wait\_egde(c):  
GPIO.output(plus\_pin,GPIO.HIGH)  
time.sleep(0.001)  
GPIO.output(plus\_pin,GPIO.LOW)

def gpio\_init():  
GPIO.setmode(GPIO.BOARD)  
GPIO.setup(edge\_pin,GPIO.IN)  
GPIO.setup(plus\_pin,GPIO.OUT,initial=GPIO.LOW)  
GPIO.add\_event\_detect(edge\_pin,GPIO.RISING,callback=wait\_egde)

def main():  
gpio\_init()

```
   while True:

```

if **name** == ‘ **main** ’:  
main()

I want to detect plus rising edge by gpio 15 interrupt,the plus frequency is 80Hz,in interrupt callback funtion output a plus by gpio 31.It seems that the plus frequency of gpio 31 is also 80Hz,but it’s not,it’s a unregular plus.Is there any solution?

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<div class="post-metadata">

**Author:** ![JerryChang](https://sea2.discourse-cdn.com/nvidia/user_avatar/forums.developer.nvidia.com/jerrychang/32/14043_2.png) [@JerryChang](https://forums.developer.nvidia.com/u/JerryChang)\
**Post date:** [August 12, 2021, 6:06am UTC](https://forums.developer.nvidia.com/t/gpio-interrupt/186345/3 "2021-08-12T06:06:27Z")

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hello 1346825367,

please try to add bounctime in milliseconds for testing,  
please check this python example, [button\_interrupt.py](https://github.com/NVIDIA/jetson-gpio/blob/master/samples/button_interrupt.py) for reference,  
thanks

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<div class="post-metadata">

**Author:** ![nadeemm](https://sea2.discourse-cdn.com/nvidia/user_avatar/forums.developer.nvidia.com/nadeemm/32/367020_2.png) [@nadeemm](https://forums.developer.nvidia.com/u/nadeemm)\
**Post date:** [October 15, 2021, 3:20am UTC](https://forums.developer.nvidia.com/t/gpio-interrupt/186345/5 "2021-10-15T03:20:15Z")

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