Jetson GPIO Test

gpio-test.py

import Jetson.GPIO as GPIO
import time
import os

last = time.time()

def gpio_event(channel):
    global last
    t = time.time()
    print(t-last)
    last = t

# Needs RT permissions
# Enable RT with:
# sudo sysctl -w kernel.sched_rt_runtime_us=-1
# and run as root
pri = os.sched_get_priority_max(os.SCHED_RR)
print("Priority:", pri)
sched = os.sched_param(pri)
os.sched_setscheduler(0, os.SCHED_RR, sched)

GPIO.setmode(GPIO.BOARD)
channel = 16
GPIO.setup(channel, GPIO.IN, pull_up_down=GPIO.PUD_OFF)
GPIO.add_event_detect(channel, GPIO.FALLING, callback=gpio_event)

while 1:
    time.sleep(1)
GPIO.cleanup()