Feedback on vhdl

[tasos69]

I am new in vhdl.I wand to do a Feedback on vhdl.
I have p1i as input and p1o as output and a signal tp,and i wand to send the output to the input.

signal tp: STD_LOGIC_VECTOR (1 DOWNTO 0);

--...---

p1i: in STD_LOGIC_VECTOR (1 DOWNTO 0);
p1o: out STD_LOGIC_VECTOR (1 DOWNTO 0);

--other code...---

p1o<=tp;
tp<=p1i;

The result that i have in output at wave for pi0 is 0X(zero and X).

Somone can help me.

 

[jeandelfrigo]

tasos69,

Make sure tp is also a std_logic_vector 1 downto 0.

Why not just loop trough P1i to P1o (p1o <= p1i) altohough it would be better to clock it if possible.