Dominick.Vansevenant/Zorro-LAN-IDE
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Logic update

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- fix LAN port byte swap with byte writes
  - swap UDS/LDS mapping to WRL/WRL
  - duplicate LAN DQ bytes by re-using ClockPort logic
  - issues:
    - DQ logic doesn't fit in one Function Block anymore
    - some optimization/relaxation might be needed
This commit is contained in:
HenrykRichter
2018-04-30 08:11:45 +02:00
parent dd0537a36d
commit c8ff432e7a
2 changed files with 1764 additions and 1756 deletions
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Logic/LAN_IDE/LAN_IDE_CP.vhd
+14 -6
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@@ -16,6 +16,8 @@
-- Revision 0.01 - File Created
-- Additional Comments:
--
-- directory cleanup hint:
-- svn status|grep ^M|sed "s/^M [\t ]*//"|xargs rm
----------------------------------------------------------------------------------
library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
@@ -92,6 +94,7 @@ architecture Behavioral of LAN_IDE_CP is
);
SIGNAL LAN_RST_SM: lan_reset :=nop;
SIGNAL lancp: STD_LOGIC; -- LAN or ClockPort
SIGNAL ide: STD_LOGIC;
SIGNAL autoconfig: STD_LOGIC;
SIGNAL lan_adr: STD_LOGIC;
@@ -200,6 +203,7 @@ begin
lan_adr <= '0';
lan_adr_sw <= '0';
cp <= '0';
lancp <= '0';
elsif(falling_edge(AS))then
--default values
autoconfig <= '0';
@@ -207,6 +211,7 @@ begin
lan_adr <= '0';
lan_adr_sw <= '0';
cp <= '0';
lancp <= '0';
if(A(23 downto 16) = x"E8" and AUTO_CONFIG_DONE < "11" and CFIN='0')then
autoconfig <= '1';
elsif(A(23 downto 16) = LAN_BASEADR and SHUT_UP(0)='0' )then
@@ -214,8 +219,10 @@ begin
lan_adr_sw <= '1';
end if;
lan_adr <= '1';
lancp <= '1';
elsif(A(23 downto 16) = CP_BASEADR and SHUT_UP(1)='0')then
cp <= '1';
lancp <= '1';
elsif(A(23 downto 16) = IDE_BASEADR and SHUT_UP(2)='0')then
ide <= '1';
end if;
@@ -256,8 +263,9 @@ begin
if(lan_adr='1' and DS='0' and A(15)='0')then
LAN_RD_S <= RW;
LAN_WRH_S <= not UDS and not RW;
LAN_WRL_S <= not LDS and not RW;
-- swapped LDS/UDS here: ENC624 is little endian
LAN_WRH_S <= not LDS and not RW;
LAN_WRL_S <= not UDS and not RW;
end if;
end if;
end process lan_rw_gen;
@@ -442,13 +450,13 @@ begin
Dout1 & x"FFF" when RW='1' and autoconfig ='1' and AS='0' else
(others => 'Z');
--defined lancp signal that matches both LAN and CP addresses
DQ <= LAN_D_CLR when (LAN_RST_SM = wait0 or LAN_RST_SM = clr or LAN_RST_SM = clr_commit) else
LAN_D_SET when (LAN_RST_SM = wait1 or LAN_RST_SM = set or LAN_RST_SM = set_commit) else
D when RW='0' and AS='0' and lan_adr ='1' and lan_adr_sw ='0' else
D( 7 downto 0) & D( 7 downto 0) when RW='0' and AS='0' and lancp = '1' and LDS='0' and UDS='1' else
D(15 downto 8) & D(15 downto 8) when RW='0' and AS='0' and lancp = '1' and LDS='1' and UDS='0' else
D( 7 downto 0) & D(15 downto 8) when RW='0' and AS='0' and lan_adr ='1' and lan_adr_sw ='1' else
D when RW='0' and AS='0' and cp = '1' and LDS='0' and UDS='0' else
D( 7 downto 0) & D( 7 downto 0) when RW='0' and AS='0' and cp = '1' and LDS='0' and UDS='1' else
D(15 downto 8) & D(15 downto 8) when RW='0' and AS='0' and cp = '1' and LDS='1' and UDS='0'
D when RW='0' and AS='0' and lancp ='1'
else (others => 'Z');
IDE_W <= IDE_W_S when AS='0' else '1';