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- added command fifo for xfer unit

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- completed first version of receiver
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git-svn-id: http://moon:8086/svn/vhdl/trunk@811 cc03376c-175c-47c8-b038-4cd826a8556b
This commit is contained in:
jens
2010-03-23 11:34:28 +00:00
parent c3c2cdfe2b
commit cd285df8e8
5 changed files with 558 additions and 173 deletions
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lib/emac/src/emac_top_jb.vhd
+20 -13
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@@ -73,8 +73,9 @@ registers_write:
if rising_edge(CLK_I) then
if_rdy <= '1';
tx_ctrl_in.data_vld <= '0';
tx_ctrl_in.alloc_req_size_vld <= '0';
tx_ctrl_in.alloc_req_en <= '0';
tx_ctrl_in.tx_size_vld <= '0';
tx_ctrl_in.tx_req_en <= '0';
rx_ctrl_in.uncommit <= '0';
if RST_I = '1' then
rx_int_en <= '0';
tx_int_en <= '0';
@@ -84,18 +85,19 @@ registers_write:
when "0000" =>
tx_ctrl_in.tx_er <= DAT_I(31);
tx_ctrl_in.alloc_req_en <= DAT_I(16);
tx_ctrl_in.tx_req_en <= DAT_I(17);
rx_ctrl_in.uncommit <= DAT_I(16);
tx_int_en <= DAT_I(5);
rx_int_en <= DAT_I(4);
when "0001" =>
if_rdy <= '0'; -- allow request size to propagate inside TX module
tx_ctrl_in.alloc_req_size_vld <= '1';
tx_din <= X"0000" & DAT_I(31 downto 16);
tx_ctrl_in.tx_size_vld <= '1';
tx_din <= X"0000" & DAT_I(31 downto 16);
when "0010" =>
tx_ctrl_in.data_vld <= '1';
tx_din <= DAT_I;
tx_ctrl_in.data_vld <= '1';
tx_din <= DAT_I;
when others => null;
end case;
@@ -107,26 +109,31 @@ registers_read:
process(CLK_I)
begin
if rising_edge(CLK_I) then
ACK_O <= '0';
rx_ctrl_in.data_read <= '0';
ACK_O <= rx_ctrl_out.data_vld;
DAT_O <= rx_dout;
if (STB_I and CYC_I) = '1' then
ACK_O <= not WE_I;
DAT_O <= (others => '0');
case ADDR_I(5 downto 2) is
when "0000" =>
DAT_O <= (others => '0');
ACK_O <= not WE_I;
DAT_O(31) <= tx_ctrl_in.tx_er;
DAT_O(30) <= mii_rx_er;
DAT_O(29) <= mii_col;
DAT_O(28) <= mii_crs;
DAT_O(16) <= tx_ctrl_out.alloc_req;
DAT_O(17) <= tx_ctrl_out.tx_req;
DAT_O(16) <= rx_ctrl_out.rx_vld;
DAT_O(5) <= tx_int_en;
DAT_O(4) <= rx_int_en;
when "0001" =>
DAT_O(31 downto 16) <= tx_ctrl_out.alloc_req_size(15 downto 0);
ACK_O <= not WE_I;
DAT_O <= tx_ctrl_out.tx_size & rx_ctrl_out.rx_size;
when "0010" =>
rx_ctrl_in.data_read <= not WE_I;
when others => null;
end case;
end if;