view_para_mux.vhd

eda 开发数字钟的设计具体编程代码和开发流程与设计图

--6-ch data MUX module
--For view parameter from DEBUG LED BOARD
--view_data3 has locking-up function.
--
--2003.12.6

library ieee;
use ieee.std_logic_1164.all;
use ieee.std_logic_unsigned.all;

entity view_para_mux is
	port(clk_lock	    :in  std_logic;--may 5~~10Khz, lock up REGs per 0.1~~0.2ms
		 DEBUG_KEY 		:in  std_logic_vector(4 downto 0);
		 
		 view_data0_L	:in  std_logic_vector(7 downto 0);
		 view_data0_M	:in  std_logic_vector(7 downto 0);
		 view_data0_R	:in  std_logic_vector(7 downto 0);		 
		 
		 view_data1_L	:in  std_logic_vector(7 downto 0);
		 view_data1_M	:in  std_logic_vector(7 downto 0);
		 view_data1_R	:in  std_logic_vector(7 downto 0);
		 
		 view_data2_L	:in  std_logic_vector(7 downto 0);
		 view_data2_M	:in  std_logic_vector(7 downto 0);
		 view_data2_R	:in  std_logic_vector(7 downto 0);
		 
		 view_data3_L	:in  std_logic_vector(7 downto 0);
		 view_data3_M	:in  std_logic_vector(7 downto 0);
		 view_data3_R	:in  std_logic_vector(7 downto 0);
		 
		 view_data4_L	:in  std_logic_vector(7 downto 0);
		 view_data4_M	:in  std_logic_vector(7 downto 0);
		 view_data4_R	:in  std_logic_vector(7 downto 0);
		 
		 view_data5_L	:in  std_logic_vector(7 downto 0);
		 view_data5_M	:in  std_logic_vector(7 downto 0);
		 view_data5_R	:in  std_logic_vector(7 downto 0);
		 		 
		 DEBUG_DATA_L	:out std_logic_vector(7 downto 0); --left
		 DEBUG_DATA_M	:out std_logic_vector(7 downto 0); --middle
		 DEBUG_DATA_R	:out std_logic_vector(7 downto 0)  --right
	     );
end view_para_mux;
architecture beh of view_para_mux is

signal	 Reg_view_data1_L	:  std_logic_vector(7 downto 0);
signal	 Reg_view_data1_M	:  std_logic_vector(7 downto 0);
signal   Reg_view_data1_R	:  std_logic_vector(7 downto 0);

begin
	process(DEBUG_KEY,clk_lock)
	begin
		if clk_lock'event and clk_lock='1' then
			if DEBUG_KEY(0)='1' then  			--key3 up,
				Reg_view_data1_L<=view_data1_L; --when key3 down,lock up the Reg...
				Reg_view_data1_M<=view_data1_M;
				Reg_view_data1_R<=view_data1_R;
			end if;	
		end if;
	end process;
	
	process(DEBUG_KEY)
	begin
		case DEBUG_KEY is
			when "11111"=> --default situation
				DEBUG_DATA_L<=view_data0_L; --0x00--no use
				DEBUG_DATA_M<=view_data0_M; --
				DEBUG_DATA_R<=view_data0_R; --
			when "11110"=> --key1 pushed				--Ref R.G.B. L
				DEBUG_DATA_L<=Reg_view_data1_L; --Ref_R_L
				DEBUG_DATA_M<=Reg_view_data1_M; --Ref_G_L
				DEBUG_DATA_R<=Reg_view_data1_R; --Ref_B_L
			when "11101"=> --key2 pushed				--Ref R.G.B. H
				DEBUG_DATA_L<=view_data2_L; --Ref_R_H
				DEBUG_DATA_M<=view_data2_M; --Ref_G_H
				DEBUG_DATA_R<=view_data2_R; --Ref_B_H
			when "11011"=> --key3 pushed,when pushed,lock the REGs
				DEBUG_DATA_L<=view_data3_L; --ch AD samples R, with locked up
				DEBUG_DATA_M<=view_data3_M; --ch AD samples G
				DEBUG_DATA_R<=view_data3_R; --ch AD samples B
			when "10111"=> --key4 pushed
				DEBUG_DATA_L<=view_data4_L;--ch AD samples R, no locked up
				DEBUG_DATA_M<=view_data4_M;--ch AD samples G, no locked up
				DEBUG_DATA_R<=view_data4_R;--ch AD samples B, no locked up
			when "01111"=> --key5 pushed
				DEBUG_DATA_L<=view_data5_L;
				DEBUG_DATA_M<=view_data5_M;
				DEBUG_DATA_R<=view_data5_R;
			when others=>
				DEBUG_DATA_L<="11101110"; --"EE"
				DEBUG_DATA_M<="11101110";
				DEBUG_DATA_R<="11101110";			
		end case;			
	end process;
end beh;