Python GPIO Library for the Rock64 (R64.GPIO)
I'd like to report my test on the interrupt of the GPIO, I wish this will be help for the development.

Hardware : Rock64 4GB (Rock64 V2 2017-0713)
Software : bionic-minimal-rock64-0.6.31-209-arm64 (kernel 4.4.120).

I tried interrupts with gpio-int-test.c on physical pin 16 (GPIO3_A5):
root@rock64:~# ./gpio-int-test 101

poll() GPIO 101 interrupt occurred
poll() GPIO 101 interrupt occurred

It had responses, but I found the followings :
  1. once gpio-int-test started, pin 16 had already been pulled-up internally to 3.2 V.
  2. it was difficult for me to pull-down the pin. With a 20K resistor pull-down to ground, interrupt was triggered repeatedly. With a 10K resistor, pin voltage became 0.443V, and it became more stable. When I opened the 10K resistor, interrupt was triggered.

The problem is : 
10K pull-down resistor is quite small, and even with the 10K resistor, the pin voltage is still 0.443V, not close 0V. There should be something wrong.

Messages In This Thread
RE: Python GPIO Library for the Rock64 (R64.GPIO) - by edupv - 04-11-2018, 10:02 PM

Possibly Related Threads…
Thread Author Replies Views Last Post
  Rock64 won't boot luminosity7 9 1,543 05-20-2023, 08:43 AM
Last Post: luminosity7
  How well does Rock64 deal with HDR and Atmos on Kodi? drvlikhell 3 764 04-29-2023, 04:24 AM
Last Post: newestssd
  OpenWRT on the Rock64 CanadianBacon 12 4,926 04-24-2023, 12:40 PM
Last Post: arunkhan
  Rock64 board not working, no HDMI no Ethernet. EDited 3 2,380 01-17-2023, 02:31 PM
Last Post: Flagtrax
  ROCK64 v3 can it boot from USB? Tsagualsa 4 874 11-29-2022, 11:31 AM
Last Post: Macgyver
  rock64 v3 spiflash Macgyver 0 331 11-28-2022, 02:18 PM
Last Post: Macgyver
  my rock64 dosen't work rookie_267 0 523 10-07-2022, 07:50 PM
Last Post: rookie_267
  Rock64 u-boot for eMMC Build Error mexicanflyer 0 578 09-18-2022, 02:29 PM
Last Post: mexicanflyer
  ROCK64 - Not start mathieu 0 780 07-11-2022, 03:49 AM
Last Post: mathieu
  Rock64 bricked shawwwn 6 4,060 01-29-2022, 05:49 AM
Last Post: shawwwn

Forum Jump:

Users browsing this thread: 1 Guest(s)