大师们请指点：怎么没有仿真输出波形？

library&nbsp;ieee;<br />use&nbsp;ieee.std_logic_1164.all;<br />use&nbsp;ieee.std_logic_unsigned.all;<br />entity&nbsp;haohao&nbsp;is<br />&nbsp;port(clkk:in&nbsp;std_logic;<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;ret:in&nbsp;std_logic;<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;clk1hz:out&nbsp;std_logic);<br />end&nbsp;haohao;<br />architecture&nbsp;behav&nbsp;of&nbsp;haohao&nbsp;is<br />signal&nbsp;&nbsp;div2clk&nbsp;:&nbsp;integer&nbsp;range&nbsp;7&nbsp;downto&nbsp;0;<br />&nbsp;signal&nbsp;&nbsp;&nbsp;kk1:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;std_logic;<br />begin<br />process(clkk,ret)<br />begin<br />&nbsp;&nbsp;if&nbsp;ret='1'&nbsp;&nbsp;then&nbsp;&nbsp;kk1&lt='0';<br />elsif&nbsp;&nbsp;div2clk=5&nbsp;then&nbsp;kk1&lt=not&nbsp;kk1;&nbsp;div2clk&lt=0;<br />elsif&nbsp;clkk'event&nbsp;and&nbsp;clkk='1'&nbsp;then&nbsp;div2clk&lt=div2clk+1;<br />end&nbsp;if;<br />end&nbsp;process;<br />clk1hz&lt=kk1;<br />end&nbsp;behav;