uart: bugfix fuer busy reset

[calu.git] / cpu / src / extension_uart_b.vhd

diff --git a/cpu/src/extension_uart_b.vhd b/cpu/src/extension_uart_b.vhd
index 7df072ab5fa7d9be8ded77e94dfa4fd114bf38a5..09cec401b335ea2bcb8f1767de17d7faee7d5857 100644 (file)
--- a/cpu/src/extension_uart_b.vhd
+++ b/cpu/src/extension_uart_b.vhd
@@ -17,8 +17,7 @@ signal        bd_rate : baud_rate_l;
 signal rx_data : std_logic_vector(7 downto 0);
 
 signal uart_int_nxt : std_logic;
-
-signal uart_data_read, uart_data_read_nxt : std_logic;
+signal uart_data_read_nxt : std_logic;
 
 begin
 
@@ -75,7 +74,6 @@ begin
                        w4_uart_receive <= (others=>'0');
                        tx_rdy_int <= '0';
                        new_tx_data <= '0';
-                       uart_data_read <= '0';
                        uart_int <= '0';
 
        elsif rising_edge(clk) then            
@@ -85,14 +83,14 @@ begin
                        w4_uart_receive <= w4_uart_receive_nxt;
                        new_tx_data <= new_tx_data_nxt;
                        tx_rdy_int <= tx_rdy;
-                       uart_data_read <= uart_data_read_nxt;
                        uart_int <= uart_int_nxt;
    end if;
 end process syn;
 
 -------------------------- LESEN UND SCHREIBEN ANFANG ------------------------------------------------------------
 
-gwriten : process (ext_reg,tx_rdy,w1_st_co,w2_uart_config,w3_uart_send,w4_uart_receive,tx_rdy_int, rx_data, new_bus_rx, uart_data_read)
+gwriten : process
+       (ext_reg,tx_rdy,w1_st_co,w2_uart_config,w3_uart_send,w4_uart_receive,tx_rdy_int, rx_data, new_bus_rx, uart_data_read_nxt)
 
 variable tmp_data  : gp_register_t;
 
@@ -142,7 +140,7 @@ begin
                uart_int_nxt <= '1';
        end if;
        
-       if (uart_data_read = '1' and w1_st_co(1) = '1' and ext_reg.sel = '1') then
+       if (uart_data_read_nxt = '1' and w1_st_co(1) = '1' and ext_reg.sel = '1') then
                w1_st_co_nxt(1) <= '0';
        end if;