vga.vhd

EDA实验--PS2键盘实验:利用键盘作为输入设备

library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
use IEEE.STD_LOGIC_ARITH.ALL;
use IEEE.STD_LOGIC_UNSIGNED.ALL;

entity vga_16 is
    Port ( clk : in std_logic;
           hs : out std_logic;
           vs : out std_logic;
           r : out std_logic;
           g : out std_logic;
           b : out std_logic;
		   innum  : in std_logic_vector(15 downto 0);
		   innum0 : in std_logic_vector(15 downto 0); 
           innum1 : in std_logic_vector(6 downto 0);
           innum2 : in std_logic_vector(6 downto 0);
           innum3 : in std_logic_vector(6 downto 0);
		   innum4 : in std_logic_vector(6 downto 0));
end vga_16;

architecture Behavioral of vga_16 is

constant  color1: std_logic_vector:="010";		--显示颜色为红色
constant  color2: std_logic_vector:="100";
constant  color3: std_logic_vector:="001";
constant  color4: std_logic_vector:="110";

signal 	hs1,vs1,fclk,cclk: std_logic;
signal 	fs: std_logic_vector(5 downto 0);
signal 	cc: std_logic_vector(4 downto 0);
signal 	ll: std_logic_vector(8 downto 0);
signal 	rgbp: std_logic_vector(3 downto 1);
signal	rgb: std_logic_vector(3 downto 1);

begin

	rgb(1)<=rgbp(1) and hs1 and vs1;
	rgb(2)<=rgbp(2) and hs1 and vs1;
	rgb(3)<=rgbp(3) and hs1 and vs1;
	
	fclk<=fs(5);
	cclk<=cc(4);
	
	hs<=hs1;
	vs<=vs1;
	
	r<=rgb(2);
	g<=rgb(3);
	b<=rgb(1);
	
	process(clk)
	begin
		if clk'event and clk='1' then
			if fs=50 then
				fs<="000000";
			else
				fs<=fs+1;
			end if;
		end if;
	end process;

	process(fclk)
	begin
		if fclk'event and fclk='1' then
			if cc=27 then
				cc<="00000";
			else
				cc<=cc+1;
			end if;
		end if;
	end process;

	process(cclk)
	begin
		if cclk'event and cclk='1' then
			if ll=481 then
				ll<="000000000";
			else
				ll<=ll+1;
			end if;
		end if;
	end process;

	process(cc, ll)
	begin
		if cc>23 then 			--行同步
			hs1<='0';
		else hs1<='1';
		end if;
		if ll>479 then			--场同步
			vs1<='0';
		else vs1<='1';
		end if;
	end process;

	process(cc,ll,innum,innum0,innum1,innum2,innum3,innum4)
	begin
		if cc>2 and cc<7 then
			if ll>60 and ll<101 and innum4(0)='0' then	--a0
				rgbp<=color1;
			elsif ll>180 and ll<221 and innum4(6)='0' then	--g0
				rgbp<=color1;
			elsif ll>300 and ll<341 and innum4(3)='0' then	--d0
				rgbp<=color1;
			elsif ll>60 and ll<202 then
				if (cc>2 and cc<4) and innum4(5)='0' then	--f0
					rgbp<=color1;
				elsif (cc>5 and cc<7) and innum4(1)='0' then	--b0
					rgbp<=color1;
				else rgbp<="000";
				end if;
			elsif ll>201 and ll<341 then
				if (cc>2 and cc<4) and innum4(4)='0' then	--e0
					rgbp<=color1;
				elsif (cc>5 and cc<7) and innum4(2)='0' then	--c0
					rgbp<=color1;
				else rgbp<="000";
				end if;
			elsif ll>350 and ll<370 then
				if cc>2 and cc<4 and innum(15)='1' then	--p8
					rgbp<=color1;
				elsif cc>3 and cc<5 and innum(14)='1' then	--p4
					rgbp<=color1;
				elsif cc>4 and cc<6 and innum(13)='1' then	--p2
					rgbp<=color1;
				elsif cc>5 and cc<7 and innum(12)='1' then	--p1
					rgbp<=color1;
				else rgbp<="000";
				end if;
			elsif ll>380 and ll<400 then	
				if cc>2 and cc<4 and innum0(15)='1' then	--q8
					rgbp<=color1;
				elsif cc>3 and cc<5 and innum0(14)='1' then	--q4
					rgbp<=color1;
				elsif cc>4 and cc<6 and innum0(13)='1' then	--q2
					rgbp<=color1;
				elsif cc>5 and cc<7 and innum0(12)='1' then	--q1
					rgbp<=color1;
				else rgbp<="000";
				end if;
			else
				rgbp<="000";
			end if;
		elsif cc>7 and cc<12 then
			if ll>60 and ll<101 and innum3(0)='0' then
				rgbp<=color2;
			elsif ll>180 and ll<221 and innum3(6)='0' then
				rgbp<=color2;
			elsif ll>300 and ll<341 and innum3(3)='0' then
				rgbp<=color2;
			elsif ll>60 and ll<202 then
				if (cc>7 and cc<9) and innum3(5)='0' then
					rgbp<=color2;
				elsif (cc>10 and cc<12) and innum3(1)='0' then
					rgbp<=color2;
				else rgbp<="000";
				end if;
			elsif ll>201 and ll<341 then
				if (cc>7 and cc<9) and innum3(4)='0' then
					rgbp<=color2;
				elsif (cc>10 and cc<12) and innum3(2)='0' then
					rgbp<=color2;
				else rgbp<="000";
				end if;
			elsif ll>350 and ll<370 then
				if cc>7 and cc<9 and innum(11)='1' then
					rgbp<=color2;
				elsif cc>8 and cc<10 and innum(10)='1' then
					rgbp<=color2;
				elsif cc>9 and cc<11 and innum(9)='1' then
					rgbp<=color2;
				elsif cc>10 and cc<12 and innum(8)='1' then
					rgbp<=color2;
				else rgbp<="000";
				end if;
			elsif ll>380 and ll<400 then
				if cc>7 and cc<9 and innum0(11)='1' then
					rgbp<=color2;
				elsif cc>8 and cc<10 and innum0(10)='1' then
					rgbp<=color2;
				elsif cc>9 and cc<11 and innum0(9)='1' then
					rgbp<=color2;
				elsif cc>10 and cc<12 and innum0(8)='1' then
					rgbp<=color2;
				else rgbp<="000";
				end if;
			else
				rgbp<="000";
			end if;
		elsif cc>12 and cc<17 then
			if ll>60 and ll<101 and innum2(0)='0' then
				rgbp<=color3;
			elsif ll>180 and ll<221 and innum2(6)='0' then
				rgbp<=color3;
			elsif ll>300 and ll<341 and innum2(3)='0' then
				rgbp<=color3;
			elsif ll>60 and ll<202 then
				if (cc>12 and cc<14) and innum2(5)='0' then
					rgbp<=color3;
				elsif (cc>15 and cc<17) and innum2(1)='0' then
					rgbp<=color3;
				else rgbp<="000";
				end if;
			elsif ll>201 and ll<341 then
				if (cc>12 and cc<14) and innum2(4)='0' then
					rgbp<=color3;
				elsif (cc>15 and cc<17) and innum2(2)='0' then
					rgbp<=color3;
				else rgbp<="000";
				end if;
			elsif ll>350 and ll<370 then
				if cc>12 and cc<14 and innum(7)='1' then
					rgbp<=color3;
				elsif cc>13 and cc<15 and innum(6)='1' then
					rgbp<=color3;
				elsif cc>14 and cc<16 and innum(5)='1' then
					rgbp<=color3;
				elsif cc>15 and cc<17 and innum(4)='1' then
					rgbp<=color3;
				else rgbp<="000";
				end if;
			elsif ll>380 and ll<400 then
				if cc>12 and cc<14 and innum0(7)='1' then
					rgbp<=color3;
				elsif cc>13 and cc<15 and innum0(6)='1' then
					rgbp<=color3;
				elsif cc>14 and cc<16 and innum0(5)='1' then
					rgbp<=color3;
				elsif cc>15 and cc<17 and innum0(4)='1' then
					rgbp<=color3;
				else rgbp<="000";
				end if;
			else
				rgbp<="000";
			end if;
		elsif cc>17 and cc<22 then
			if ll>60 and ll<101 and innum1(0)='0' then
				rgbp<=color4;
			elsif ll>180 and ll<221 and innum1(6)='0' then
				rgbp<=color4;
			elsif ll>300 and ll<341 and innum1(3)='0' then
				rgbp<=color4;
			elsif ll>60 and ll<202 then
				if (cc>17 and cc<19) and innum1(5)='0' then
					rgbp<=color4;
				elsif (cc>20 and cc<22) and innum1(1)='0' then
					rgbp<=color4;
				else rgbp<="000";
				end if;
			elsif ll>201 and ll<341 then
				if (cc>17 and cc<19) and innum1(4)='0' then
					rgbp<=color4;
				elsif (cc>20 and cc<22) and innum1(2)='0' then
					rgbp<=color4;
				else rgbp<="000";
				end if;
			elsif ll>350 and ll<370 then
				if cc>17 and cc<19 and innum(3)='1' then
					rgbp<=color4;
				elsif cc>18 and cc<20 and innum(2)='1' then
					rgbp<=color4;
				elsif cc>19 and cc<21 and innum(1)='1' then
					rgbp<=color4;
				elsif cc>20 and cc<22 and innum(0)='1' then
					rgbp<=color4;
				else rgbp<="000";
				end if;
			elsif ll>380 and ll<400 then
				if cc>17 and cc<19 and innum0(3)='1' then
					rgbp<=color4;
				elsif cc>18 and cc<20 and innum0(2)='1' then
					rgbp<=color4;
				elsif cc>19 and cc<21 and innum0(1)='1' then
					rgbp<=color4;
				elsif cc>20 and cc<22 and innum0(0)='1' then
					rgbp<=color4;
				else rgbp<="000";
				end if;
			else rgbp<="000";
			end if;	
		else rgbp<="000";
		end if;
	end process;

end Behavioral;