Hi,
Bug Report:
==========
The NeoTrellis INT line occasionally getting stuck low issue.
Reproduce Case:
===============
I created a very simple reproduce case that is documented below:
Setup (pictures attached):
=========================================================
- (1) ItsyBitsy M4
- (1) NeoTrellis Keypad
- (1) Adafruit example code: interrupt.ino from the Adafruit seesaw Library\examples\NeoTrellis\interrupt\interrupt.ino
(this Adafruit example code polls the neotrellis INT line (there are no interrupts being used on the M4...the file name interrupt.ino is a bit confusing)
(this reproduce case is 100% Adafruit example code)
Test:
====
- press a kypd button a few times with the loop() delay set to 2ms.
- press a kypd button a few times with the loop() delay set to 50ms.
Results:
=========================================================
1) when the delay() in loop() is 2 ms the INT line does Not get stuck low
2) when the delay() in loop() is 50 ms the INT line Does get stuck low occasionally (anything >= a 7 ms delay() will cause the INT line to occasionally get stuck low)
Conclusions:
=========================================================
1) the length of the delay() in loop() appears to adversely affect the neotrellis INT pin's behavior
2) any code in loop() that takes longer then 7 ms to run will cause this issue to appear
3) this seems like a bug in the neotrellis firmware (ATSAMD09D14A see saw firmware)
4) this is a very straight forward way to reproduce the issue for testing and debugging
Let me know what you make of this reproduce case,
Louie
p.s. i have 13 of these neotrellis boards.
p.s. there is a workaround...detect when the INT line is stuck low and call NeoTrellis.SWReset()
p.s. i think Adafruit is awesome. I am very happy Adafruit customer. Your sw libraries make building so easy.
NeoTrellis INT line Bug Report
Moderators: adafruit_support_bill, adafruit
Please be positive and constructive with your questions and comments.
- LuLu100
- Posts: 18
- Joined: Fri Aug 10, 2018 3:34 pm
NeoTrellis INT line Bug Report
- Attachments
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- neoTrellis_issue_1.jpg (937.12 KiB) Viewed 253 times
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- neoTrellis_issue_2.jpg (892.64 KiB) Viewed 253 times
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- neoTrellis_issue_3.jpg (858.29 KiB) Viewed 253 times
- mikeysklar
- Posts: 13936
- Joined: Mon Aug 01, 2016 8:10 pm
Re: NeoTrellis INT line Bug Report
Nice bug report. Thank you for narrowing down the timing and the hard work.
Would you mind filing it with the Adafruit Seesaw github repo?
https://github.com/adafruit/Adafruit_Seesaw/issues
Would you mind filing it with the Adafruit Seesaw github repo?
https://github.com/adafruit/Adafruit_Seesaw/issues
- LuLu100
- Posts: 18
- Joined: Fri Aug 10, 2018 3:34 pm
Re: NeoTrellis INT line Bug Report
Hi Mike,
I created a github issue per your request:
https://github.com/adafruit/Adafruit_Seesaw/issues/76
Louie
I created a github issue per your request:
https://github.com/adafruit/Adafruit_Seesaw/issues/76
Louie
- mikeysklar
- Posts: 13936
- Joined: Mon Aug 01, 2016 8:10 pm
Re: NeoTrellis INT line Bug Report
Louie,
Thank you for all your work here. Good stuff.
Thank you for all your work here. Good stuff.
- adafruit2
- Posts: 22148
- Joined: Fri Mar 11, 2005 7:36 pm
Re: NeoTrellis INT line Bug Report
we're aware o the bug but have not had the time to sit down and figure out whats up!
Please be positive and constructive with your questions and comments.