fact: Definition splitAtByte n (bits : BITS ((n.+1)*8)) :BITS (n*8) * BYTE := (split2 (n*8) 8 bits).
imports: Coq(ZArith.ZArith Strings.String) mathcomp.ssreflect.ssreflect mathcomp(ssrfun ssrbool eqtype ssrnat seq fintype tuple zmodp)