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The NeoTrellis INT line occasionally getting stuck low issue.
Reproduce Case:
I created a very simple reproduce case that is documented below:
Setup:
(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)
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:
when the delay() in loop() is 2 ms the INT line does Not get stuck low
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:
the length of the delay() in loop() appears to adversely affect the neotrellis INT pin's behavior
any code in loop() that takes longer then 7 ms to run will cause this issue to appear
this seems like a bug in the neotrellis firmware (ATSAMD09D14A see saw firmware)
this is a very straight forward way to reproduce the issue for testing and debugging
Hope this is helpful,
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.
The text was updated successfully, but these errors were encountered:
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:
(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)
Pictures:
This bug report was originally posted on the adafruit forum which included some pictures
https://forums.adafruit.com/viewtopic.php?f=22&t=192463
Test:
Results:
Conclusions:
Hope this is helpful,
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.
The text was updated successfully, but these errors were encountered: