Edit - Arduino Stack Exchange

You are not logged in. Your edit will be placed in a queue until it is peer reviewed.

We welcome edits that make the post easier to understand and more valuable for readers. Because community members review edits, please try to make the post substantially better than how you found it, for example, by fixing grammar or adding additional resources and hyperlinks.

I'm not sure how useful interrupts are on a button matrix.

Gerben
– Gerben

2020-08-19 14:42:21 +00:00
Commented Aug 19, 2020 at 14:42
polling force cpu to check i/o ports in loop that cause waste cpu time and code is a cascaded for loop. where using interrupts lets cpu doing its normal code and interrupt with its input Vector make every thing ready for you, by some bit-wise operations you can find changed port and send correct output.

Saeed Mirshams
– Saeed Mirshams

2020-08-22 08:32:46 +00:00
Commented Aug 22, 2020 at 8:32
That’s a very common newbie trap. But go ahead.

Delta_G
– Delta_G

2020-09-18 17:07:48 +00:00
Commented Sep 18, 2020 at 17:07

Add a comment |

Correct minor typos or mistakes
Clarify meaning without changing it
Add related resources or links
Always respect the author’s intent
Don’t use edits to reply to the author

create code fences with backticks ` or tildes ~
```
like so
```
add language identifier to highlight code
```python
def function(foo):
print(foo)
```
put returns between paragraphs
for linebreak add 2 spaces at end
_italic_ or **bold**
indent code by 4 spaces
backtick escapes `like _so_`
quote by placing > at start of line
to make links (use https whenever possible)

<https://example.com>

[example](https://example.com)

<a href="https://example.com">example</a>

formatting help »
answering help »