X-Git-Url: http://wien.tomnetworks.com/gitweb/?a=blobdiff_plain;f=cpu%2Fsrc%2Frs232_rx_arc.vhd;h=0a9df83efd043ea824540ad389a46121539673e5;hb=61ccae8df4f138fd753bd1e5e7e8b8f25159d969;hp=1bdc472806753a562cbf6c9c933d4f3969bcb9dc;hpb=3e9337b7a4d81fb059f90716d7df9aa3bec9d719;p=calu.git

diff --git a/cpu/src/rs232_rx_arc.vhd b/cpu/src/rs232_rx_arc.vhd
index 1bdc472..0a9df83 100755
--- a/cpu/src/rs232_rx_arc.vhd
+++ b/cpu/src/rs232_rx_arc.vhd
@@ -26,6 +26,8 @@ architecture beh of rs232_rx is
 	signal cnt, cnt_next : integer := 0;
 	signal baud_cnt, baud_cnt_next : std_logic_vector(BAUD_RATE_WIDTH-1 downto 0);
 	signal rx_data_int, rx_data_nxt, rx_data_res_int, rx_data_res_nxt : uart_data;
+	signal sync : std_logic_vector(1 to SYNC_STAGES);
+	signal bus_rx : std_logic;
 	
 begin
 	-- syncronisierungs Prozess
@@ -36,7 +38,9 @@ begin
 			state <= IDLE;
 			cnt <= 0;
 			rx_data_res_int <= x"00";
+			rx_data_int <= (others => '0');
 			baud_cnt <= (others => '0');
+			sync <= (others => '1');
 
 		elsif rising_edge(sys_clk) then
 			-- sync Zustand, uebernehmen der next-Signale
@@ -48,11 +52,17 @@ begin
 			rx_data_res_int <= rx_data_res_nxt;
 			new_rx_data <= new_rx_data_nxt;
 
+			sync(1) <= bus_rx_unsync;
+			for i in 2 to SYNC_STAGES loop
+				sync(i) <= sync(i - 1);
+			end loop;
+			
 		end if;
 	end process;
 
 	-- setzen des Ausgangsignals, Rxt-Daten
 	rx_data <= rx_data_res_int;
+	bus_rx <= sync(SYNC_STAGES);
 
 	-- Zustandsmaschienen Prozess
 	rs232_states : process(sys_clk,state,cnt, bus_rx, bus_rx_last, baud_cnt,bus_rx_int,bd_rate)