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Asked: 2026-05-30T11:38:31+00:00

I am using a bread boarded arduino. Inside my interrupt functions I want to

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I am using a bread boarded arduino. Inside my interrupt functions I want to read the value of one of my GPIO pins and then increment a counter if it is low. I am doing that using the following.

displayValues[4]++;
hasButtonPushed = true;

if(digitalRead(BUTTON_A) == LOW) {
    displayValues[5]++;
}
if(digitalRead(BUTTON_B) == LOW) {
    displayValues[6]++;
}
if(digitalRead(BUTTON_C) == LOW) {
    displayValues[7]++;
}

However, even when the input line is directly tied to high, the code returns low. I don’t believe that my Atmel is damaged. Any ideas?

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1 Answer

  1. Editorial Team

    The problem was an issue with the arduino library that was causing digital read not to work. The newer arduino versions fixed this issue but I got around it by rewriting everything into native AVR.

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