📄 scinode2.vhd
字号:
else
case where_to_send is
when 0 =>
data_out <= req_xmit_q( req_xmit_q_first )(3);
when 1 =>
data_out <= res_xmit_q( res_xmit_q_first )(3);
when 2 => --send over the bypass_fifo & clear bypass_fifo
data_out <= bypass_fifo( bypass_fifo_ptr )(4);
bypass_fifo( bypass_fifo_ptr )(0) <= "1111111111111111"; bypass_fifo( bypass_fifo_ptr )(1) <= "1111111111111111";
bypass_fifo( bypass_fifo_ptr )(2) <= "1111111111111111"; bypass_fifo( bypass_fifo_ptr )(3) <= "1111111111111111";
bypass_fifo( bypass_fifo_ptr )(4) <= "1111111111111111";
when others =>
data_out <= "1111111111111111";
end case;
-- counter <= 5;
if( where_to_send = 4 or where_to_send = 3 or where_to_send = 2 ) then
priority_flg <= 0;
else
priority_flg <= where_to_send + 1;
end if;
end if;
when others => --send idle packet
data_out <= "1111111111111111";
-- counter <= 0;
end case;
-- reciever segment code;
case counter is
when 0 =>
if( global_cnt = 0 ) then
where_to_store <= 0;
else
case targetId(7 downto 0) is
when AddressId =>
where_to_store <= 1; --recieve the packet into the scinode reciever queue
when "11111111" => --skip idle packet,
when others =>
bypass_fifo( bypass_fifo_last )(0) <= data_in;
where_to_store <= 3;
end case;
end if;
counter <= 1;
when 1 =>
case where_to_store is
when 1 => --place the data_in into the res_rec_q or req_rec_q
case command is
when "00" =>
if( req_rec_q_full = '1' ) then
where_to_store <= 4;
stripper_q( stripper_q_last )(1) <= "0000000000000001";
stripper_q( stripper_q_last )(2) <= "00000000" & AddressId;
stripper_q( stripper_q_last )(3) <= "0000000000000001";
else
where_to_store <= 1;
end if;
when "10" => --response packet
if( res_rec_q_full = '1' ) then
where_to_store <= 4;
stripper_q( stripper_q_last )(1) <= "0000000000000011";
stripper_q( stripper_q_last )(2) <= "00000000" & AddressId;
stripper_q( stripper_q_last )(3) <= "0000000000000001";
else
where_to_store <= 2;
end if;
when "01" => --request echo
echo_flag <= 1;
when "11" => --response echo
echo_flag <= 2;
when others =>
end case;
when 3 => --bypass_fifo
bypass_fifo( bypass_fifo_last )(1) <= data_in;
when others =>
end case;
counter <= 2;
when 2 =>
case echo_flag is
when 0 => --not echo message;
case where_to_store is
when 1 =>
req_rec_q( req_rec_q_last )(0) <= data_in;
when 2 =>
res_rec_q( res_rec_q_last )(0) <= data_in;
when 3 =>
bypass_fifo( bypass_fifo_last )(2) <= data_in;
when 4 =>
stripper_q( stripper_q_last )(0) <= data_in;
if( stripper_q_last = 3 ) then
stripper_q_last <= 0;
else
stripper_q_last <= stripper_q_last + 1;
end if;
when others =>
end case;
when others =>
echo_sourceId <= data_in(7 downto 0);
end case;
counter <= 3;
when 3 =>
case echo_flag is
when 0 =>
case where_to_store is
when 1 =>
req_rec_q( req_rec_q_last )(1) <= data_in;
when 2 =>
res_rec_q( res_rec_q_last )(1) <= data_in;
when 3 =>
bypass_fifo( bypass_fifo_last )(3) <= data_in;
when others =>
end case;
when 1 => --request echo
if( data_in(0) = '0' ) then --the transaction is complete
if( req_xmit_q( req_xmit_q_first )(0)(7 downto 0) = echo_sourceId ) then
req_xmit_q_flg( req_xmit_q_first ) <= 0;
if( req_xmit_q_first = 3 ) then
req_xmit_q_first <= 0;
else
req_xmit_q_first <= req_xmit_q_first + 1;
end if;
end if;
else --resent the previous request packet
if( req_xmit_q( req_xmit_q_first )(0)(7 downto 0) = echo_sourceId ) then
req_xmit_q_flg( req_xmit_q_first ) <= 2;
end if;
end if;
when 2 => --response echo
if( data_in(0) = '0' ) then --the transaction is complete
if( res_xmit_q( res_xmit_q_first )(0)(7 downto 0) = echo_sourceId ) then
res_xmit_q_flg( res_xmit_q_first ) <= 0;
if( res_xmit_q_first = 3 ) then
res_xmit_q_first <= 0;
else
res_xmit_q_first <= res_xmit_q_first + 1;
end if;
end if;
else
if( res_xmit_q( res_xmit_q_first )(0)(7 downto 0) = echo_sourceId ) then
res_xmit_q_flg( res_xmit_q_first ) <= 2;
end if;
end if;
end case;
counter <= 4;
when 4 =>
case echo_flag is
when 0 =>
case where_to_store is
when 1 =>
req_rec_q( req_rec_q_last )(2) <= data_in;
if( req_rec_q_last = 3 ) then
req_rec_q_last <= 0;
else
req_rec_q_last <= req_rec_q_last + 1;
end if;
when 2 =>
res_rec_q( res_rec_q_last )(2) <= data_in;
if( res_rec_q_last = 3 ) then
res_rec_q_last <= 0;
else
res_rec_q_last <= res_rec_q_last + 1;
end if;
when 3 =>
bypass_fifo( bypass_fifo_last )(4) <= data_in;
if( bypass_fifo_last = 3 ) then
bypass_fifo_last <= 0;
else
bypass_fifo_last <= bypass_fifo_last + 1;
end if;
when others =>
end case;
when others =>
end case;
counter <= 5;
when others => --truncate the idle packet
counter <= 0;
if( echo_flag = 0 ) then
case where_to_store is --check if queue is full
when 2 =>
if( res_rec_q_last = res_rec_q_first ) then
res_rec_q_full <= '1';
end if;
when 1 =>
if( req_rec_q_last = req_rec_q_first ) then
req_rec_q_full <= '1';
end if;
when others =>
end case;
end if;
echo_flag <= 0;
where_to_store <= 0;
end case;
--Manupulate the recieving data
if( counter = 0 ) then
if( req_rec_q_full = '1' or ( process_priority /= 2 and req_rec_q_first /= req_rec_q_last )) then
if( req_rec_q( req_rec_q_first )(1)(8) = '0' ) then --request packet and store data;
case req_rec_q( req_rec_q_first )(1)(3 downto 0) is
when "0000" =>
a_tmp(0) <= req_rec_q( req_rec_q_first )(2)(15 downto 8);
b_tmp(0) <= req_rec_q( req_rec_q_first )(2)(7 downto 0);
when "0001" =>
a_tmp(1) <= req_rec_q( req_rec_q_first )(2)(15 downto 8);
b_tmp(1) <= req_rec_q( req_rec_q_first )(2)(7 downto 0);
when "0010" =>
a_tmp(2) <= req_rec_q( req_rec_q_first )(2)(15 downto 8);
b_tmp(2) <= req_rec_q( req_rec_q_first )(2)(7 downto 0);
when "0011" =>
a_tmp(3) <= req_rec_q( req_rec_q_first )(2)(15 downto 8);
b_tmp(3) <= req_rec_q( req_rec_q_first )(2)(7 downto 0);
when "0100" =>
a_tmp(4) <= req_rec_q( req_rec_q_first )(2)(15 downto 8);
b_tmp(4) <= req_rec_q( req_rec_q_first )(2)(7 downto 0);
when "0101" =>
a_tmp(5) <= req_rec_q( req_rec_q_first )(2)(15 downto 8);
b_tmp(5) <= req_rec_q( req_rec_q_first )(2)(7 downto 0);
when "0110" =>
a_tmp(6) <= req_rec_q( req_rec_q_first )(2)(15 downto 8);
b_tmp(6) <= req_rec_q( req_rec_q_first )(2)(7 downto 0);
when "0111" =>
a_tmp(7) <= req_rec_q( req_rec_q_first )(2)(15 downto 8);
b_tmp(7) <= req_rec_q( req_rec_q_first )(2)(7 downto 0);
when "1000" =>
a_tmp(8) <= req_rec_q( req_rec_q_first )(2)(15 downto 8);
b_tmp(8) <= req_rec_q( req_rec_q_first )(2)(7 downto 0);
when others =>
end case;
stripper_q( stripper_q_last )(0) <= req_rec_q( req_rec_q_first )(0); --insert request echo
stripper_q( stripper_q_last )(1) <= "0000000000000001";
stripper_q( stripper_q_last )(2) <= "00000000" & AddressId;
stripper_q( stripper_q_last )(3) <= "0000000000000000";
if( stripper_q_last = 3 ) then --update the stripper_q_last
stripper_q_last <= 0;
else
stripper_q_last <= stripper_q_last + 1;
end if;
if( req_rec_q_first = 3 ) then
req_rec_q_first <= 0;
else
req_rec_q_first <= req_rec_q_first + 1;
end if;
req_rec_q_full <= '0'; --deassert the req_rec_q_full signal
end if; --request packet and load data; NOT IMPLEMENT!!!!
process_priority <= 2;
elsif( res_rec_q_full = '1' or ( process_priority /= 1 and res_rec_q_first /= res_rec_q_last )) then
if( res_rec_q( res_rec_q_first )(1)(8) = '0' ) then --request packet and store data;
case res_rec_q( res_rec_q_first )(1)(3 downto 0) is
when "0000" =>
a_tmp(0) <= res_rec_q( res_rec_q_first )(2)(15 downto 8);
b_tmp(0) <= res_rec_q( res_rec_q_first )(2)(7 downto 0);
when "0001" =>
a_tmp(1) <= res_rec_q( res_rec_q_first )(2)(15 downto 8);
b_tmp(1) <= res_rec_q( res_rec_q_first )(2)(7 downto 0);
when "0010" =>
a_tmp(2) <= res_rec_q( res_rec_q_first )(2)(15 downto 8);
b_tmp(2) <= res_rec_q( res_rec_q_first )(2)(7 downto 0);
when "0011" =>
a_tmp(3) <= res_rec_q( res_rec_q_first )(2)(15 downto 8);
b_tmp(3) <= res_rec_q( res_rec_q_first )(2)(7 downto 0);
when "0100" =>
a_tmp(4) <= res_rec_q( res_rec_q_first )(2)(15 downto 8);
b_tmp(4) <= res_rec_q( res_rec_q_first )(2)(7 downto 0);
when "0101" =>
a_tmp(5) <= res_rec_q( res_rec_q_first )(2)(15 downto 8);
b_tmp(5) <= res_rec_q( res_rec_q_first )(2)(7 downto 0);
when "0110" =>
a_tmp(6) <= res_rec_q( res_rec_q_first )(2)(15 downto 8);
b_tmp(6) <= res_rec_q( res_rec_q_first )(2)(7 downto 0);
when "0111" =>
a_tmp(7) <= res_rec_q( res_rec_q_first )(2)(15 downto 8);
b_tmp(7) <= res_rec_q( res_rec_q_first )(2)(7 downto 0);
when "1000" =>
a_tmp(8) <= res_rec_q( res_rec_q_first )(2)(15 downto 8);
b_tmp(8) <= res_rec_q( res_rec_q_first )(2)(7 downto 0);
when others =>
end case;
stripper_q( stripper_q_last )(0) <= req_rec_q( req_rec_q_first )(0); --insert request echo
stripper_q( stripper_q_last )(1) <= "0000000000000011";
stripper_q( stripper_q_last )(2) <= "00000000" & AddressId;
stripper_q( stripper_q_last )(3) <= "0000000000000000";
if( stripper_q_last = 3 ) then --update the stripper_q_last
stripper_q_last <= 0;
else
stripper_q_last <= stripper_q_last + 1;
end if;
if( res_rec_q_first = 3 ) then
⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -