initial files of pc_communication

[hwmod.git] / src / pc_communication.vhd

diff --git a/src/pc_communication.vhd b/src/pc_communication.vhd
new file mode 100644 (file)
index 0000000..3681c69
--- /dev/null
+++ b/src/pc_communication.vhd
@@ -0,0 +1,68 @@
+library ieee;
+use ieee.std_logic_1164.all;
+use ieee.numeric_std.all;
+use work.gen_pkg.all;
+
+
+entity pc_communication is
+       port (
+               sys_clk : in std_logic;
+               sys_res_n : in std_logic;
+
+               --button
+               btn_a : in std_logic;
+
+               --uart_tx
+               tx_data : out std_logic_vector(7 downto 0);
+               tx_new : out std_logic;
+               tx_done : in std_logic;
+
+               --uart_rx
+               rx_data : in std_logic_vector(7 downt 0); --not really required
+               rx_new : in std_logic_vector;
+
+               -- History
+               d_zeile : out hzeile;
+               d_spalte : out hspalte;
+               d_get :  out std_logic;
+               d_done : in std_logic;
+               d_char : in hbyte --;
+       );
+end entity pc_communication;
+
+
+
+architecture beh of display is
+       signal push_history, push_history_next : std_logic;
+begin
+
+       sync_push_history : process (sys_clk, sys_res_n)
+       begin
+               if sys_res_n = '0' then
+                       push_history <= '0';
+               elsif rising_edge(sys_clk) then
+                       push_history <= push_history_next;
+               end if;
+       end process sync_push_history;
+
+       push_history : process(rx_new, rx_data, btn_a)
+       begin
+               if ( (rx_new = '1' and rx_data = X"41") or btn_a '1') then
+                       push_history_next <= '1';
+               else
+                       push_history_next <= '0';
+               end if;
+       end process push_history;
+
+--     sync_pc : process ()
+--     begin
+--     end process sync_pc;
+--
+--     next_state_pc : process ()
+--     begin
+--     end process next_state_pc;
+--
+--     output_pc : process ()
+--     begin
+--     end process output_pc;
+end architecture beh;