Python GPIO Library for the Rock64 (R64.GPIO)
#11
Internal SoC PullUps are usually between 20K to 100K.

So, using a external PullDown to put it low is like creating a voltage divider with the internal pullup, therefore with a external 20K, you get a voltage that is neither a LOW or a HIGH, explaining why you get interrupts triggered repeatedly.

If you use a external 1K as a pulldown instead, you will see that will be close to 0V ...
  Reply


Messages In This Thread
RE: Python GPIO Library for the Rock64 (R64.GPIO) - by martinayotte - 04-12-2018, 08:08 AM

Possibly Related Threads…
Thread Author Replies Views Last Post
  Rock64 board not working, no HDMI no Ethernet. EDited 3 1,904 01-17-2023, 02:31 PM
Last Post: Flagtrax
  How well does Rock64 deal with HDR and Atmos on Kodi? drvlikhell 2 357 12-16-2022, 09:51 PM
Last Post: drvlikhell
  ROCK64 v3 can it boot from USB? Tsagualsa 4 404 11-29-2022, 11:31 AM
Last Post: Macgyver
  rock64 v3 spiflash Macgyver 0 170 11-28-2022, 02:18 PM
Last Post: Macgyver
  OpenWRT on the Rock64 CanadianBacon 9 3,469 11-05-2022, 03:07 PM
Last Post: wilsonYan
  my rock64 dosen't work rookie_267 0 351 10-07-2022, 07:50 PM
Last Post: rookie_267
  Rock64 u-boot for eMMC Build Error mexicanflyer 0 411 09-18-2022, 02:29 PM
Last Post: mexicanflyer
  ROCK64 - Not start mathieu 0 607 07-11-2022, 03:49 AM
Last Post: mathieu
  Rock64 bricked shawwwn 6 3,404 01-29-2022, 05:49 AM
Last Post: shawwwn
  Rock64 <--> Rock64 Serial Connection mark1250 1 1,363 12-23-2021, 09:27 PM
Last Post: barray

Forum Jump:


Users browsing this thread: 1 Guest(s)