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depreciate uint64ToString() #10

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junwoo091400
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Just uint64ToString function fix. Won't have any visual / performance difference.

previously, it was doing bit shift operation, and then truncated the string.
but since the values given to this function won't go over 4 billion for sure, this won't make any difference really :(
Setting values aren't as big as uint64_t. So there is no reason to use that function.
@junwoo091400 junwoo091400 changed the title Correct uint64ToString for plain Decimal numbers depreciate uint64ToString() Jul 6, 2018
@junwoo091400
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I think it is better not to use such function. We don't have any setting data that big anyway. And even if it is over 32-big boundary, that would require 10 digits. And I don't know if OLED can display that :)

@SolidGeek
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Yeah you are right, however, I am trying to get rid of the whole String constructor, as it takes up quite a lot of memory - and the whole sketch size is on the limit of the Atmega328p.

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