library ieee; use ieee.std_logic_1164.all; Entity mcontrol is port( m_set,set,start,mopen,result,clk1,clk:in std_logic; en1,green,red,jinbao:out std_logic ); end mcontrol; Architecture behav of mcontrol is type states is(st0,st1,st2,st3,st4,st5); signal st:states; signal sp: std_logic; begin process(m_set, set, start, mopen, result, clk1, clk) begin if m_set='1'then en1<='0';green<='0';red<='0';sp<='0'; elsif clk'event and clk='1'then case st is when st0=> en1<='0'; green<='0'; red<='0'; sp<='0'; if start='1' then st<=st1; else st<=st0; end if; when st1=> en1<='1'; green<='0'; red<='0'; sp<='0'; if result='1' then st<=st2; elsif mopen='1' then st<=st4; elsif set='1' then st<=st0; else st<=st1; end if; when st2=> en1<='1'; green<='0'; red<='0'; sp<='0'; if mopen='1' then st<=st3; elsif set='1' then st<=st0; else st<=st2; end if; when st3=> en1<='0'; green<='1'; red<='0'; sp<='0'; if set='1' then st<=st0; else st<=st3; end if; when st4=> en1<='1'; green<='0'; red<='1'; sp<='0'; if result='1' then st<=st2; elsif set='1' then st<=st0; elsif result='0' and mopen='1' then st<=st5; else st<=st4; end if; when st5=> en1<='0'; green<='0'; red<='1'; sp<='1'; if set='1' then st<=st0; else st<=st5; end if; when others=> st<=st0; end case; end if; end process; jinbao<=(sp and clk1); end behav;解释代码
时间: 2024-04-23 09:22:34 浏览: 55
vhdl.zip_All Out_vhdl library use
这段代码是一个基于状态机的控制器,其实体定义了7个输入输出端口。其中,m_set、set、start、mopen、result是输入端口,clk1、clk是时钟输入端口,en1、green、red、jinbao是输出端口。
该控制器的状态由states类型定义,共有6个状态:st0、st1、st2、st3、st4和st5。在process过程中,当m_set='1'时,控制器处于初始状态,所有输出端口都被置为0;当start='1'时,控制器进入st1状态,en1输出为1,表示使能信号被置为1;当result='1'时,控制器进入st2状态,表示任务完成;当mopen='1'时,控制器进入st3状态,jinbao输出为1,表示警报信号被置为1;当result='0'且mopen='1'时,控制器进入st5状态,jinbao输出为1。
总的来说,该控制器根据输入信号的变化,不断地切换状态,控制输出信号的变化,从而实现相应的控制逻辑。
阅读全文