基于EP2C8Q208C8的数字闹钟程序.docx

library ieee;use ieee.std_logic_1164.all;use ieee.std_logic_arith.all;use ieee.std_logic_unsigned.all;entity stopwatch is port( Clk : in std_logic; -时钟输入 reset: in std_logic; -复位输入 start,over: in std_logic; -秒表控制输入 LED4_1: OUT STD_LOGIC_VECTOR(4 DOWNTO 1); MUSIC:OUT STD_LOGIC ; ledag: out std_logic_vector(6 downto 0); -七段码管显示输出 SEL:buffer std_logic_vector(1 downto 0) -七段码管扫描驱动); end stopwatch;architecture behave of stopwatch is signal Disp_Temp : integer range 0 to 15; Signal Disp_Decode:std_logic_vector(6 downto 0); signal mSEC1,mSEC10 : integer range 0 to 9; signal SEC1,SEC10 : integer range 0 to 9; signal Clk1kHz : std_logic; signal Clk1Hz : std_logic; signal Start_Flag : std_logic; SIGNAL PLED: STD_LOGIC_VECTOR(4 DOWNTO 1); begin PROCESS(clk) -generate 1hz clock signal variable cnt : INTEGER RANGE 0 TO 49999999;-产生1Hz时钟的分频计数器 BEGIN IF clk=1 AND clkevent THEN IF cnt=49999999 THEN cnt:=0; ELSE IF cnt25000000 THEN clk1hz=1; ELSE clk1hz=0; END IF; cnt:=cnt+1; END IF; END IF; END PROCESS; PROCESS(clk) -generate 1khz clock signal variable cnt1 : INTEGER RANGE 0 TO 49999;-产生1kHz时钟的分频计数器 BEGIN IF clk=1 AND clkevent THEN IF cnt1=49999 THEN cnt1:=0; ELSE IF cnt125000 THEN clk1khz=1; ELSE clk1khz=0; END IF; cnt1:=cnt1+1; END IF; END IF; END PROCESS; process(Clk1Hz) begin if(RESET=0) then -系统复位 MUSIC=1; mSEC1=0; mSEC10=0; SEC1=0; SEC10=0; Start_Flag=0; ELSif(start=0 and Start_Flag=0) then Start_Flag=1; elsif(over=0 and Start_Flag=1) then Start_Flag=0; elsif(Clk1Hzevent and Clk1Hz=1) then -正常运行 if(Start_Flag=1) then if(mSEC1=9) then mSEC1=0; if(mSEC10=5) then mSEC10=0; if(SEC1=9) then SEC1=0; if(SEC10=5) then SEC10=0; else SEC10=SEC10+1; end if; else SEC1=SEC1+1; end if; else mSEC10=mSEC10+1; end if; else mSEC1=mSEC1+1; end if; end if; end if;IF(MSEC1=0 AND MSEC10=0 AND RESET=1) THENMUSIC=0;ELSEMUSICPLEDPLEDPLEDPLEDDisp_TempDisp_TempDisp_TempDisp_Temp=mSEC1; end case; end process; process(Clk1khz) begin if(Clk1khzevent and Clk1khz=1) then -扫描累加 SEL=SEL+1;LED4_1=PLED; ledagDisp_DecodeDisp_DecodeDisp_DecodeDisp_DecodeDisp_DecodeDisp_DecodeDisp_DecodeDisp_D