16 bit one hot vector to 5 bit vector

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Hi,

I need to encode a 16 bit one hot vector to a 5 bit value (i.e every bit set in my 16 bit one hot vector represents a unique 5 bit value). I remember using state machines to do it the other way (5 bit vector to 16 bit one hot vector). Don't remember this though :(

Thanks for the help!!

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Hi ,

I think this is the code your are looking for :

library ieee;use ieee.std_logic_1164.all;use ieee.numeric_std.all;entity onehot_binary is port ( onehot_in : in std_logic_vector; binary_out : out std_logic_vector ); begin assert 2**binary_out'length = onehot_in'length severity failure;end;architecture rtl of onehot_binary is function one_hot_to_binary ( One_Hot : std_logic_vector ; size : natural ) return std_logic_vector is variable Bin_Vec_Var : std_logic_vector(size-1 downto 0); begin Bin_Vec_Var := (others => '0'); for I in One_Hot'range loop if One_Hot(I) = '1' then Bin_Vec_Var := Bin_Vec_Var or std_logic_vector(to_unsigned(I,size)); end if; end loop; return Bin_Vec_Var; end function;begin binary_out <= one_hot_to_binary(onehot_in, binary_out'length);end;

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