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
  Pine Rock64 eMMC lifespan moonspell79 3 276 08-19-2021, 06:46 PM
Last Post: bcnaz
  Rock64 No Audio - Solved wbecks 12 16,740 08-13-2021, 01:23 PM
Last Post: blakeadam
Question Hardware issues with Rock64 grobbs 11 2,379 07-24-2021, 10:23 AM
Last Post: robinkyle11
  Trustzone support for Rock64 capablegh 1 278 07-17-2021, 10:15 AM
Last Post: capablegh
  rock64, compile problems "illegal instruction", "memory fault" -> ddr_333Mhz? klausfelix 0 254 07-02-2021, 03:13 PM
Last Post: klausfelix
Information Serial Console for the Rock64 MarkHaysHarris777 33 33,267 06-24-2021, 12:24 PM
Last Post: mikeklien
  lost eletronic component rock64 marvin1986 1 516 06-01-2021, 06:27 PM
Last Post: 8bit
Shocked Rock64 - Reboots after few minutes addezai 2 728 04-22-2021, 07:03 PM
Last Post: addezai
  Rock64 Long Term stability ramprasad 4 2,330 03-16-2021, 07:23 PM
Last Post: Rocklobster
  Safest way to send shutdown signal to headless Rock64 SMB server? bmurphr1 3 1,512 03-14-2021, 06:01 PM
Last Post: clach04

Forum Jump:


Users browsing this thread: 1 Guest(s)