Update scroll to be an unsigned int #5
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scroll needs to be an unsigned integer... otherwise, it'll roll over to a negative value and 'wreak havoc' when updating the LED array in the subsequent loop. On a 32-bit processor, the int value will range from +2^31-1 top -2^31, so the rollover won't occur for a LONG time. However, on a number of Arduino platforms, the int value will only be 16-bits... so it'll roll at 32K iterations. (I commented in the YouTube video but decided to come here as well to propose the change.) Cheers, Dave
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scroll needs to be an unsigned integer... otherwise, it'll roll over to a negative value and 'wreak havoc' when updating the LED array in the subsequent loop. On a 32-bit processor, the int value will range from +2^31-1 top -2^31, so the rollover won't occur for a LONG time. However, on a number of Arduino platforms, the int value will only be 16-bits... so it'll roll at 32K iterations.
(I commented in the YouTube video but decided to come here as well to propose the change.)
Cheers,
Dave