From: Manfred <xzarion@l0725898.(none)>
Date: Tue, 11 Jan 2011 12:41:48 +0000 (+0100)
Subject: uart sollte jetzt gehen
X-Git-Tag: bootrom_v1~7
X-Git-Url: http://wien.tomnetworks.com/gitweb/?p=calu.git;a=commitdiff_plain;h=667cacc3afde14286378b3cbc54d2123c9d8807c

uart sollte jetzt gehen
---

diff --git a/cpu/src/rs232_rx_arc.vhd b/cpu/src/rs232_rx_arc.vhd
index 30d0e5b..d251e09 100755
--- a/cpu/src/rs232_rx_arc.vhd
+++ b/cpu/src/rs232_rx_arc.vhd
@@ -20,7 +20,7 @@ use work.core_pkg.all;
 
 architecture beh of rs232_rx is
 	-- definierern der intern verwendeten Signale
-	type STATE_TYPE is (IDLE, READ_START, READ_BIT, READ_STOP, POST_STOP);
+	type STATE_TYPE is (IDLE, READ_START, READ_BIT, READ_STOP);
 	signal state, state_next : STATE_TYPE;
 	signal bus_rx_last, bus_rx_int, new_rx_data_nxt : std_logic := '0';
 	signal cnt, cnt_next : integer := 0;
@@ -99,14 +99,7 @@ begin
 			when READ_STOP =>
 				-- hier wird nur noch auf das Stopbit abgewartet und gelesen um den
 				-- Lesevorgang koerrekt zu beenden
-				if baud_cnt = bd_rate and bus_rx = '1' then
-					state_next <= IDLE;
-				elsif baud_cnt = bd_rate and bus_rx = '0' then
-					state_next <= IDLE;
-				end if;
-			when POST_STOP =>
-				-- hier wird nur noch eine halbe Bitzeit gewartet
-				if baud_cnt(BAUD_RATE_WIDTH-2 downto 0) = bd_rate(BAUD_RATE_WIDTH-1 downto 1) then
+				if baud_cnt = bd_rate then
 					state_next <= IDLE;
 				end if;
 		end case;
@@ -153,17 +146,9 @@ begin
 				baud_cnt_next <= std_logic_vector(unsigned(baud_cnt) + 1);
 				if baud_cnt = bd_rate then 
 					baud_cnt_next <= (others => '0');
-					new_rx_data_nxt <= '1';
+					new_rx_data_nxt <= bus_rx;
 					rx_data_res_nxt <= rx_data_int;
 				end if;
-			when POST_STOP =>
-				--halbe bitzeit wartenr auf counter warten
-				baud_cnt_next <= baud_cnt + 1;
-				if baud_cnt(BAUD_RATE_WIDTH-2 downto 0) = bd_rate(BAUD_RATE_WIDTH-1 downto 1) then 
-					new_rx_data_nxt <= '1'; 
-					rx_data_res_nxt <= rx_data_int;
-					baud_cnt_next <= (others => '0');
-				end if;
 		end case;
 	end process;