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URL https://opencores.org/ocsvn/udp_ip_stack/udp_ip_stack/trunk

Subversion Repositories udp_ip_stack

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    /udp_ip_stack/trunk
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Rev 29 → Rev 33

/rtl/vhdl/arp_RX.vhd
213,58 → 213,61
--else
end if;
-- check for end of frame. Also, detect and discard if not our frame
if rx_count = 41 then -- TB 2013-01-14 15:09:45 was 42
next_rx_state <= PROCESS_ARP;
set_rx_state <= '1';
elsif not_our_arp(data_in, rx_count, our_ip_address) = '1' then
dataval <= data_in;
set_err_data <= '1';
next_rx_state <= WAIT_END;
set_rx_state <= '1';
elsif rx_count = 21 then
-- capture ARP operation
case data_in is
when x"01" =>
arp_oper_set_val <= REQUEST;
set_arp_oper <= '1';
when x"02" =>
arp_oper_set_val <= REPLY;
set_arp_oper <= '1';
when others => -- ignore other values
end case;
if not_our_arp(data_in, rx_count, our_ip_address) = '1' then
dataval <= data_in;
set_err_data <= '1';
next_rx_state <= WAIT_END;
set_rx_state <= '1';
 
else
case (to_integer(rx_count)) is
when 41 =>
next_rx_state <= PROCESS_ARP;
set_rx_state <= '1';
when 21 => -- capture ARP operation
case (data_in) is
when x"01" =>
arp_oper_set_val <= REQUEST;
set_arp_oper <= '1';
when x"02" =>
arp_oper_set_val <= REPLY;
set_arp_oper <= '1';
when others => -- ignore other values
end case;
-- capture source mac addr
elsif rx_count = 22 then
set_mac5 <= '1';
dataval <= data_in;
elsif rx_count = 23 then
set_mac4 <= '1';
dataval <= data_in;
elsif rx_count = 24 then
set_mac3 <= '1';
dataval <= data_in;
elsif rx_count = 25 then
set_mac2 <= '1';
dataval <= data_in;
elsif rx_count = 26 then
set_mac1 <= '1';
dataval <= data_in;
elsif rx_count = 27 then
set_mac0 <= '1';
dataval <= data_in;
-- capture source ip addr
elsif rx_count = 28 then
set_ip3 <= '1';
dataval <= data_in;
elsif rx_count = 29 then
set_ip2 <= '1';
dataval <= data_in;
elsif rx_count = 30 then
set_ip1 <= '1';
dataval <= data_in;
elsif rx_count = 31 then
set_ip0 <= '1';
dataval <= data_in;
end if;
when 22 =>
set_mac5 <= '1';
dataval <= data_in;
when 23 =>
set_mac4 <= '1';
dataval <= data_in;
when 24 =>
set_mac3 <= '1';
dataval <= data_in;
when 25 =>
set_mac2 <= '1';
dataval <= data_in;
when 26 =>
set_mac1 <= '1';
dataval <= data_in;
when 27 =>
set_mac0 <= '1';
dataval <= data_in;
when 28 => -- capture source ip addr
set_ip3 <= '1';
dataval <= data_in;
when 29 =>
set_ip2 <= '1';
dataval <= data_in;
when 30 =>
set_ip1 <= '1';
dataval <= data_in;
when 31 =>
set_ip0 <= '1';
dataval <= data_in;
when others => -- do nothing
end case;
end if;
-- end if;
end case;
 

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