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| -- 作者：wangxinxin -- 發(fā)布時(shí)間：2010-12-19 14:00:46 -- FPGA 時(shí)鐘問題 剛學(xué)不久~ 我要做24H製的時(shí)鐘~但我一直DEBUG~一直用不出來~ 我Xilinx ISE 8.2i軟體~ 請會的人幫我看一下哪出錯(cuò)了~謝 library IEEE; use IEEE.STD_LOGIC_1164.ALL; use IEEE.STD_LOGIC_ARITH.ALL; use IEEE.STD_LOGIC_UNSIGNED.ALL; ---- Uncomment the following library declaration if instantiating ---- any Xilinx primitives in this code. --library UNISIM; --use UNISIM.VComponents.all; entity CLOCK_00_60 is Port ( CLK : in STD_LOGIC; RESET : in STD_LOGIC; ENABLE : out STD_LOGIC_VECTOR (6 downto 0); SEGMENT : out STD_LOGIC_VECTOR (6 downto 0)); end CLOCK_00_60; architecture Behavioral of CLOCK_00_60 is signal SCAN_CLK :STD_LOGIC; signal COUNT_CLK :STD_LOGIC; signal DECODE_BCD :STD_LOGIC_VECTOR (3 downto 0); signal mineable :STD_LOGIC; signal hreable :STD_LOGIC; signal POSITION:STD_LOGIC_VECTOR (6 downto 0); signal DIVIDER:STD_LOGIC_VECTOR (29 downto 1); signal COUNT_BCD:STD_LOGIC_VECTOR (23 downto 0); begin ------------------------------------------------- process (CLK,RESET) begin if RESET = \'0\' then DIVIDER <= ( others => \'0\'); elsif CLK\' event and CLK = \'1\' then DIVIDER <= DIVIDER + 1 ; end if; end process; COUNT_CLK<=DIVIDER(24); SCAN_CLK<=DIVIDER(15); ------------------------------------------------秒 process(RESET,SCAN_CLK) begin if RESET = \'0\' then COUNT_BCD <= ( others => \'0\'); elsif SCAN_CLK\' event and SCAN_CLK = \'1\' then if COUNT_BCD(3 downto 0)= x"9" then COUNT_BCD(3 downto 0)<= x"0"; COUNT_BCD(7 downto 4)<= COUNT_BCD(7 downto 4)+1; else COUNT_BCD(3 downto 0)<= COUNT_BCD(3 downto 0)+1; end if; end if; end process; mineable <= \'1\' when COUNT_BCD(7 downto 0) = x"59" else \'0\'; ----------------------------------------------------------分 process(RESET,SCAN_CLK) begin if RESET = \'0\' then COUNT_BCD <= ( others => \'0\'); if mineable = \'1\' then elsif SCAN_CLK\' event and SCAN_CLK = \'1\' then if COUNT_BCD(11 downto 8)= x"9" then COUNT_BCD(11 downto 8)<= x"0"; COUNT_BCD(15 downto 12)<= COUNT_BCD(15 downto 12)+1; else COUNT_BCD(11 downto 8)<= COUNT_BCD(11 downto 8)+1; end if; end if; end if; end process; hreable <= \'1\' when COUNT_BCD(15 downto 8) = x"59" else \'0\'; -------------------------------------------------------------時(shí) process(RESET,SCAN_CLK) begin if RESET = \'0\' then COUNT_BCD <= ( others => \'0\'); if mineable = \'1\' and hreable = \'1\' then elsif SCAN_CLK\' event and SCAN_CLK = \'1\' then if COUNT_BCD(19 downto 16)= x"9" then COUNT_BCD(19 downto 16)<= x"0"; COUNT_BCD(23 downto 20)<= COUNT_BCD(23 downto 20)+1; if COUNT_BCD(19 downto 16)= x"2" then COUNT_BCD(23 downto 20)<= x"0"; else COUNT_BCD(19 downto 16)<= COUNT_BCD(19 downto 16)+1; end if; end if; end if; end if; end process; process(RESET,SCAN_CLK) begin if RESET = \'0\' then POSITION <= "1111110"; elsif SCAN_CLK\' event and SCAN_CLK = \'1\' then POSITION<="111111"&POSITION(0); end if; end process; ENABLE<=POSITION; ----------------------------------------------------------- process(POSITION,SCAN_CLK) begin case POSITION is when "1111110" => DECODE_BCD <=COUNT_BCD(3 downto 0); --秒 when "1111101" => DECODE_BCD <=COUNT_BCD(7 downto 4); --秒 when "1111011" => DECODE_BCD <=COUNT_BCD(11 downto 8); --分 when "1110111" => DECODE_BCD <=COUNT_BCD(15 downto 12); --分 when "1101111" => DECODE_BCD <=COUNT_BCD(19 downto 16); --時(shí) when "1011111" => DECODE_BCD <=COUNT_BCD(23 downto 20); --時(shí) when others => null; end case; end process; with DECODE_BCD Select SEGMENT<= "1000000" when X"0", "1111001" when X"1", "0100100" when X"2", "0110000" when X"3", "0011001" when X"4", "0010010" when X"5", "0000010" when X"6", "1111000" when X"7", "0000000" when X"8", "0010000" when X"9", "1111111" when others; end Behavioral; |