Mouse ctrl and top added
This commit is contained in:
Florian Reitz
parent
3ba31c311f
commit
d69f115303
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@ -0,0 +1,224 @@
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library IEEE;
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use IEEE.STD_LOGIC_1164.all;
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use IEEE.STD_LOGIC_unsigned.all;
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entity mouseCtrl is
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port(
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clk7m : in STD_LOGIC;
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clr : in STD_LOGIC;
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sel : in STD_LOGIC;
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PS2C : inout STD_LOGIC;
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PS2D : inout STD_LOGIC;
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byte3 : out STD_LOGIC_VECTOR(7 downto 0);
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xData : out STD_LOGIC_VECTOR(8 downto 0);
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yData : out STD_LOGIC_VECTOR(8 downto 0)
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);
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end mouseCtrl;
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architecture mouseCtrl of mouseCtrl is
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type STATE_T is (start, clklo, datlo, relclk, sndbyt, wtack,
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wtclklo, wtcdrel, wtclklo1, wtclkhi1, getack, wtclklo2,
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wtclkhi2, getmdata);
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signal state: STATE_T;
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signal PS2Cf, PS2Df, cen, den, sndflg, xs, ys: STD_LOGIC;
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signal ps2cin, ps2din ps2cio, ps2dio: STD_LOGIC;
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signal ps2c_filter, ps2d_filter: STD_LOGIC_VECTOR(7 downto 0);
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signal xMouseV, yMouseV: STD_LOGIC_VECTOR(8 downto 0);
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signal xMouseD, yMouseD: STD_LOGIC_VECTOR(8 downto 0);
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signal shift1, shift2, shift3: STD_LOGIC_VECTOR(10 downto 0);
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signal f4cmd: STD_LOGIC_VECTOR(9 downto 0);
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signal bitCount, bitCount1: STD_LOGIC_VECTOR(3 downto 0);
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signal bitCount3: STD_LOGIC_VECTOR(5 downto 0);
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signal count: STD_LOGIC_VECTOR(11 downto 0);
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constant COUNT_MAX : STD_LOGIC_VECTOR(11 downto 0) := X"2BC"; -- 700 100us
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constant BIT_COUNT_MAX: STD_LOGIC_VECTOR(3 downto 0) := "1010"; -- 10
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constant BIT_COUNT1_MAX: STD_LOGIC_VECTOR(3 downto 0) := "1100"; -- 12 ack
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constant BIT_COUNT3_MAX: STD_LOGIC_VECTOR(5 downto 0) := "100001"; -- 33
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begin
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-- tri-state buffers
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ps2cio <= ps2cin when cen = '1' else 'Z';
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ps2dio <= ps2din when den = '1' else 'Z';
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PS2C <= ps2cio;
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PS2D <= ps2dio;
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-- filter for PS2 clock
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filter: process(clk7m, clr)
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begin
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if clr = '1' then
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ps2c_filter <= (others => '0');
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ps2d_filter <= (others => '0');
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PS2Cf <= '1';
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PS2Df <= '1';
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elsif rising_edge(clk7m) then
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ps2c_filter(7) <= ps2cio;
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ps2c_filter(6 downto 0) <= ps2c_filter(7 downto 1);
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ps2d_filter(7) <= ps2dio;
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ps2d_filter(6 downto 0) <= ps2d_filter(7 downto 1);
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if ps2c_filter = X"FF" then
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PS2Cf <= '1';
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elsif ps2c_filter = X"00" then
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PS2Cf <= '0';
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end if;
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if ps2d_filter = X"FF" then
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PS2Df <= '1';
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elsif ps2d_filter = X"00" then
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PS2Df <= '0';
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end if;
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end if;
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end process filter;
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-- state machine for reading mouse
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smouse: process(clk7m, clr)
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begin
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if clr = '1' then
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state <= start;
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cen <= '0';
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den <= '0';
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ps2din <= '0';
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count <= (others => '0');
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bitCount1 <= (others => '0');
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bitCount3 <= (others => '0');
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shift1 <= (others => '0');
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shift2 <= (others => '0');
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shift3 <= (others => '0');
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xMouseV <= (others => '0');
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yMouseV <= (others => '0');
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xMouseD <= (others => '0');
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yMouseD <= (others => '0');
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sndflg <= '0';
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elsif falling_edge(clk7m) then
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case state is
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when start =>
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cen <= '1'; -- enable clock output
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ps2cin <= '0'; -- start bit
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count <= (others => '0'); -- reset count
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state <= clklo;
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when clklo =>
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if count < COUNT_MAX then
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count <= count + 1;
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state <= clklo;
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else
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state <= datlo;
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den <= '1'; -- enable data output
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end if;
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when datlo =>
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state <= relclk
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cen <= '0'; -- release clock
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when relclk =>
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sndflg <= '1';
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state <= sndbyt;
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when sndbyt =>
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if bitCount < BIT_COUNT_MAX then
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state <= sndbyt;
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else
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state <= wtack;
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sndflg <= '0';
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den <= '0'; -- release data
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end if;
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when wtack => -- wait for data low
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if PS2Df = '1' then
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state <= wtack;
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else
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state <= wtclklo;
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end if;
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when wtclklo => -- wait for clock low
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if PS2Cf = '1' then
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state <= wtclklo;
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else
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state <= wtcdrel;
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end if;
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when wtcdrel => -- wait to release clock and data
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if PS2Cf = '1' and PS2Df = '1' then
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state <= wtclklo1;
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bitCount1 <= (others => '0');
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else
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state <= wtcdrel;
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end if;
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when wtclklo1 => -- wait for clock low
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if bitCount1 < BIT_COUNT1_MAX then
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if PS2Cf = '1' then
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state <= wtclklo1;
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else
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state wtclkhi1; -- get ack byte FA
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shift1 <= PS2Df & shift1(10 downto 1);
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end if;
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else
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state <= getack;
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end if;
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when wtclkhi1 => -- wait for clock high
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if PS2Cf = '0' then
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state <= wtclkhi1;
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else
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state <= wtclklo1;
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bitCount1 <= bitCount1 + 1;
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end if;
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when getack => -- get ack FA
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yMouseV <= shift1(9 downto 1);
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xMouseV <= shift2(8 downto 0);
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byte3 <= shift1(10 downto 5) & shift1(1 downto 0);
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state <= wtclklo2;
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bitCount3 <= (others => '0');
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when wtclklo2 => -- wait for clock low
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if bitCount3 < BIT_COUNT3_MAX then
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if PS2Cf = '1' then
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state <= wtclklo2;
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else
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state <= wtclkhi2;
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shift1 <= PS2Df & shift1(10 downto 1);
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shift2 <= shift1(0) & shift2(10 downto 1);
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shift3 <= shift2(0) & shift3(10 downto 1);
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end if;
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else
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xMouseV <= shift3(5) & shift2(8 downto 1); -- x velocity
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yMouseV <= shift3(6) & shift1(8 downto 1); -- y velocity
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byte3 <= shift3(8 downto 1);
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state <= getmdata;
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end if;
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when wtclkhi2 => -- wait for clock high
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if PS2Cf = '0' then
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state <= wtclkhi2;
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else
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state <= wtclklo2;
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bitCount3 <= bitCount3 + 1;
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end if;
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when getmdata => -- read mouse data and keep going
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xMouseD <= xMouseD + xMouseV; -- x distance
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yMouseD <= yMouseD + yMouseV; -- y distance
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bitCount3 <= (others => '0');
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state <= wtclklo2;
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end case;
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end if;
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end process smouse;
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-- send F4 command to mouse
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sndf4: process(PS2Cf, clr, sndflg)
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begin
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if clr = '1' then
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f4cmd <= "1011110100"; -- stop-parity-F4
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ps2din <= '0';
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bitCount <= (others => '0');
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elsif falling_edge(PS2Cf) and sndflg = '1' then
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ps2din <= f4cmd(0);
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f4cmd(8 downto 0) <= f4cmd(9 downto 1);
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f4cmd(9) <= '0';
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bitCount <= bitCount + 1;
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end if;
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end process sndf4;
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-- output select
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outsel: process(xMouseV, yMouseV, xMouseD, yMouseD, sel)
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begin
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if sel = '0' then
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xData <= xMouseV;
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yData <= yMouseV;
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else
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xData <= xMouseD;
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yData <= yMouseD;
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end if;
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end process outsel;
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end architecture mouseCtrl;
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@ -0,0 +1,49 @@
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library IEEE;
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use IEEE.STD_LOGIC_1164.all;
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use work.ps2_components.all;
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entity mouseTop is
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port(
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mclk : in STD_LOGIC;
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PS2C : inout STD_LOGIC;
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PS2D : inout STD_LOGIC;
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btn : in STD_LOGIC_VECTOR(3 downto 0);
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ld : out STD_LOGIC_VECTOR(3 downto 0);
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aToG : out STD_LOGIC_VECTOR(6 downto 0);
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dp : out STD_LOGIC;
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an : out STD_LOGIC_VECTOR(3 downto 0)
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);
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end mouseTop;
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architecture mouseTop of mouseTop is
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signal clk7m, clk190, clr: STD_LOGIC;
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signal byte3: STD_LOGIC_VECTOR(7 downto 0);
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signal xData, yData: STD_LOGIC_VECTOR(8 downto 0);
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signal xMouse: STD_LOGIC_VECTOR(15 downto 0);
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begin
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clr <= btn(3);
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dp <= '1'; -- decimal points off
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xMouse <= xData(7 downto 0) & yData(7 downto 0);
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ld(0) <= yData(8);
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ld(1) <= xData(8);
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ld(2) <= byte3(1); -- right button
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ld(3) <= byte3(0); -- left button
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U1 : clkdiv2
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port map(mclk => mclk, clr => clr, clk7m => clk7m, clk190 => clk190);
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U2 : mouseCtrl
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port map(clk7m => clk7m, clr => clr, sel => btn(0),
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PS2C => PS2C, PS2D => PS2D, byte3 => byte3,
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xData => xData, yData => yData);
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U3 : x7segb
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port map(x => xMouse, cclk => clk190, clr => clr,
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aToG => aToG, an => an);
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end mouseTop;
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