A common cause of skin cancer is when two adjacent thymine (T) base pairs are fused together by an incoming ultraviolet ray. This causes the strand to be mis-read, which under the right circumstances causes the cell to go haywire.

Write a VHDL module which streams the genome through, and asserts (makes high) the foundtt signal every time the module emits a T which is part of a pair of Ts. It should be able to handle more than two in sequence, such as TTT or TTTT.

Adenine A00
Thymine T01
Guanine G10
Cytosine C11


Starter code

library IEEE; use IEEE.std_logic_1164.all; entity gene_findtt is port( clk : in std_logic; nuc_in : in std_logic_vector(1 downto 0); -- Input nucleotide nuc_out : out std_logic_vector(1 downto 0); -- Input nucleotide foundtt : out std_logic -- Whether the output nucleotide is part of a pair of thymines ); end; architecture synth of gene_findtt is begin end;

Are you confident about this change? (select one to recompile)

Compiler/test output: