Nibbles and Bits
The Care and Feeding of My Pet Arduino
by Budd Churchward - WB7FHC - NIBBLES AND BITS LIBRARY
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In this section we are going to start keeping track of how long the key is held down.
We don't have to actually measure the time, instead we count how many times Arduino
loops through our sketch while the key is down. As soon as we release the key we are
going to print that value on the Serial Monitor. Also notice that we will put our
counter back to zero when we do that.
We won't be printing X's across the screen any more, so delete the line highlighted in orange.
Then copy the 4 sections highlighted in yellow and and paste them into your sketch in the places shown.
Notice the new line in the sketch that says:
downTime++;Another way to write the same line would be:
downTime=downTime+1;They both add 1 to downTime everytime Arduino loops through this code.
Compile and Run the sketch.
The numbers that appear on your monitor indicate the number of times Arduino swings through the loop while you are holding down the key. The longer you hold down the key, the larger the number.