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Timeline for Hex to binary, LED blinking

Current License: CC BY-SA 3.0

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Mar 20, 2017 at 16:07 comment added Edgar Bonet I just timed both solutions, both inside a function taking a uint8_t argument and returning an int. The OP's function takes from 14 to 86 cycles, depending on the number of set bits found. Yours takes 281 CPU cycles irrespective of its input.
Mar 20, 2017 at 15:40 comment added Edgar Bonet The OP already solved the problem of counting the bits set, and his solution looks more efficient than yours.
Mar 20, 2017 at 14:56 history answered Code Gorilla CC BY-SA 3.0