我最近几乎完成了我的项目(我需要创建分频器(50MHZ->1HZ(1s))并完成 7 段显示解码器)。我的项目包含一个计时器(倒计时到 00:00 触发警报,如果当前状态为 00:00 则向上计数)。该项目在 Active HDL Simulator 上运行良好,但我不知道它是否适用于 FPGA。我使用行为方法使用 1 个进程编写了代码。我的问题是:如果我完成分频器,我的代码是否可以在 FPGA 上运行?如果没有,我该如何修改代码才能工作?
我的代码:
library IEEE;
use IEEE.STD_LOGIC_1164.all;
use IEEE.STD_LOGIC_unsigned.all;
use IEEE.STD_LOGIC_arith.all;
entity Timer is
port(start_stop,M,S : in std_logic; --Start/Stop , Minutes,Seconds
clk : in std_logic; -- clock 1 MHz
alarm : out std_logic; -- alarm/buzzer
s1,s2,m1,m2 : inout std_logic_vector(6 downto 0)); --BCD to 7segment display representation for seconds and minutes
end Timer;
--}} End of automatically maintained section
architecture Timer of Timer is
signal sec1,sec2,min1,min2 : std_logic_vector(3 downto 0);
signal T : std_logic := '0';
signal done : std_logic;
signal cu : std_logic;
component seg7 is
port(bcd : in std_logic_vector(3 downto 0);
output : out std_logic_vector(6 downto 0)
);
end component;
begin
P0 : process(clk,start_stop,M,S)
variable temp1,temp2,temp3,temp4 : std_logic_vector(3 downto 0);
variable carry_s,carry_m : std_logic;
variable alarm_counter : std_logic_vector(3 downto 0) := "1111"; -- buzzer/alarm counter
begin
if(M = '1'and S = '1' and start_stop = '0')
then
temp1 := "0000";
temp2 := "0000";
temp3 := "0000";
temp4 := "0000";
sec1 <= temp1;
sec2 <= temp2;
min1 <= temp3;
min2 <= temp4;
alarm <= '0';
done <= '0';
T <= '0';--RESET when you press M and S
elsif(M = '0' and S = '1' and start_stop = '0')
then
temp1 := temp1 + "0001";
if(temp1 = "1010")
then
temp1 := "0000";
carry_s := '1';
else
carry_s := '0';
end if;
if(carry_s = '1')
then
temp2 := temp2 + "0001";
if(temp2 = "0110")
then
temp2 := "0000";
carry_s := '0';
end if;
end if;
sec1 <= temp1;
sec2 <= temp2;-- Increment seconds when you press M
elsif(M = '1' and S = '0' and start_stop = '0')
then
temp3 := temp3 + "0001";
if(temp3 = "1010")
then
temp3 := "0000";
carry_m := '1';
else
carry_m := '0';
end if;
if(carry_m = '1')
then
temp4 := temp4 + "0001";
if(temp4 = "1010")
then
temp4 := "0000";
carry_m := '0';
end if;
end if;
min1 <= temp3;
min2 <= temp4;-- Increment minutes when you press M
elsif(S = '0' and M = '0' and start_stop = '1')
then
alarm <= '0';
T <= T xor '1';-- T Flip Flop behaviour
if(sec1 /= "0000" or sec2 /= "0000" or min1 /= "0000" or min2 /= "0000")
then
cu <= '0';
else
cu <= '1';
end if; -- counting directions
elsif(T = '1' and RISING_EDGE(clk))
then
if(cu = '0')
then
done <= '0';
temp1 := temp1 - "0001";
if(temp1 = "1111")
then
temp2 := temp2 - "0001";
temp1 := "1001";
end if;
if(temp2 = "1111")
then
temp2 := "0101";
carry_s := '1';
else
carry_s := '0';
end if;
if(carry_s = '1')
then
temp3 := temp3 - "0001";
if(temp3 = "1111")
then
temp4 := temp4 - "0001";
temp3 := "1001";
end if;
end if;
if(temp1 = "0000" and temp2 = "0000" and temp3 = "0000" and temp4 = "0000")
then
done <= '1';
end if;
sec1 <= temp1;
sec2 <= temp2;
min1 <= temp3;
min2 <= temp4;-- counting down
else
temp1 := temp1 + "0001";
if(temp1 = "1010")
then
temp1 := "0000";
temp2 := temp2 + "0001";
end if;
if(temp2 = "0110")
then
temp2 := "0000";
carry_s := '1';
else
carry_s := '0';
end if;
if(carry_s = '1')
then
temp3 := temp3 + "0001";
if(temp3 = "1010")
then
temp3 := "0000";
temp4 := temp4 + "0001";
if(temp4 = "1010")
then
temp4 := "0000";
T <= '0';
end if;
end if;
end if;
sec1 <= temp1;
sec2 <= temp2;
min1 <= temp3;
min2 <= temp4;-- counting up
end if;
end if;
if(done = '1')
then
T <= '0';
alarm_counter := alarm_counter - "0001";
alarm <= '1';
if(alarm_counter = "0000")
then
done <= '0';
alarm <= '0';
end if;
else
alarm_counter := "1111";
alarm <= '0';
end if;-- when the alarm starts
end process P0;
C1 : seg7 port map (sec1,s1);
C2 : seg7 port map (sec2,s2);
C3 : seg7 port map (min1,m1);
C4 : seg7 port map (min2,m2);
-- seven segment display port mapping
end Timer;
编辑:我修复了代码