標(biāo)題: 程序錯誤，求助 [打印本頁] 作者: 淼森 時間: 2011-10-12 15:52 標(biāo)題: 程序錯誤，求助 六十進制計數(shù)器
library ieee;
use ieee.std_logic_1164.all;
use ieee.std_logic_unsigned.all;
entity counter_60 is
port(clk,bcd1wr,bcd10wr,cin:in std_logic;
co: out std_logic;
datain: in std_logic_vector(3 downto 0);
bcd1: out std_logic_vector(3 downto 0);
bcd10: out std_logic_vector(2 downto 0));
end counter_60;
architecture rtl of counter_60 is
signal bcd1n:std_logic_vector(3 downto 0);
signal bcd10n:std_logic_vector(2 downto 0);
begin
bcd1<=bcd1n;
bcd10<=bcd10n;
process(clk,bcd1wr,datain) is
begin
if(bcd1wr='1') then
bcd1n<=datain;
elsif(clk'event and clk='1') then
if(cin='1') then
if(bcd1n=9) then
bcd1n<="0000";
else
bcd1n<=bcd1n+'1';
end if;
end if;
end if;
end process;
process(clk,bcd10wr,datain) is
begin
if(bcd10wr='1') then
bcd10n<=datain(2 downto 0);
elsif(clk'event and clk='1') then
if(cin='1' and bcd1n=9) then
if(bcd10n=5) then
bcd10n<="000";
else
bcd10n<=bcd10n+'1';
end if;
end if;
end if;
end process;
process(bcd10n,bcd1n,cin) is
begin
if((cin='1') and (bcd1n=9) and (bcd10n=5)) then
co<='1';
else
co<='0';
end if;
end process;
end rtl;
可以編譯，但是仿真不合適，仿真不計數(shù)，請各位老師同仁指正，萬分感謝作者: penpen 時間: 2011-10-13 20:13
可能你這個程序應(yīng)該是沒有初始化初始值吧，作者: uacom 時間: 2011-10-19 14:01
請檢查你的程序邏輯是否有誤？作者: zhulinxy123 時間: 2011-11-2 13:54
仿真時，輸入信號定義時要給初始值