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https://opencores.org/ocsvn/udp_ip_stack/udp_ip_stack/trunk
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| Rev 30 |
Rev 31 |
| Line 211... |
Line 211... |
rx_count_mode <= RST;
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rx_count_mode <= RST;
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set_rx_state <= '1';
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set_rx_state <= '1';
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--else
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--else
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end if;
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end if;
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-- check for end of frame. Also, detect and discard if not our frame
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-- check for end of frame. Also, detect and discard if not our frame
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if rx_count = 41 then -- TB 2013-01-14 15:09:45 was 42
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if not_our_arp(data_in, rx_count, our_ip_address) = '1' then
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next_rx_state <= PROCESS_ARP;
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set_rx_state <= '1';
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elsif not_our_arp(data_in, rx_count, our_ip_address) = '1' then
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dataval <= data_in;
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dataval <= data_in;
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set_err_data <= '1';
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set_err_data <= '1';
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next_rx_state <= WAIT_END;
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next_rx_state <= WAIT_END;
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set_rx_state <= '1';
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set_rx_state <= '1';
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elsif rx_count = 21 then
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-- capture ARP operation
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else
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case data_in is
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case (to_integer(rx_count)) is
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when 41 =>
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next_rx_state <= PROCESS_ARP;
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set_rx_state <= '1';
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when 21 => -- capture ARP operation
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case (data_in) is
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when x"01" =>
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when x"01" =>
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arp_oper_set_val <= REQUEST;
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arp_oper_set_val <= REQUEST;
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set_arp_oper <= '1';
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set_arp_oper <= '1';
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when x"02" =>
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when x"02" =>
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arp_oper_set_val <= REPLY;
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arp_oper_set_val <= REPLY;
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set_arp_oper <= '1';
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set_arp_oper <= '1';
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when others => -- ignore other values
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when others => -- ignore other values
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end case;
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end case;
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-- capture source mac addr
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-- capture source mac addr
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elsif rx_count = 22 then
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when 22 =>
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set_mac5 <= '1';
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set_mac5 <= '1';
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dataval <= data_in;
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dataval <= data_in;
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elsif rx_count = 23 then
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when 23 =>
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set_mac4 <= '1';
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set_mac4 <= '1';
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dataval <= data_in;
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dataval <= data_in;
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elsif rx_count = 24 then
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when 24 =>
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set_mac3 <= '1';
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set_mac3 <= '1';
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dataval <= data_in;
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dataval <= data_in;
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elsif rx_count = 25 then
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when 25 =>
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set_mac2 <= '1';
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set_mac2 <= '1';
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dataval <= data_in;
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dataval <= data_in;
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elsif rx_count = 26 then
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when 26 =>
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set_mac1 <= '1';
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set_mac1 <= '1';
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dataval <= data_in;
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dataval <= data_in;
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elsif rx_count = 27 then
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when 27 =>
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set_mac0 <= '1';
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set_mac0 <= '1';
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dataval <= data_in;
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dataval <= data_in;
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-- capture source ip addr
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when 28 => -- capture source ip addr
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elsif rx_count = 28 then
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set_ip3 <= '1';
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set_ip3 <= '1';
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dataval <= data_in;
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dataval <= data_in;
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elsif rx_count = 29 then
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when 29 =>
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set_ip2 <= '1';
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set_ip2 <= '1';
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dataval <= data_in;
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dataval <= data_in;
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elsif rx_count = 30 then
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when 30 =>
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set_ip1 <= '1';
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set_ip1 <= '1';
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dataval <= data_in;
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dataval <= data_in;
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elsif rx_count = 31 then
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when 31 =>
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set_ip0 <= '1';
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set_ip0 <= '1';
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dataval <= data_in;
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dataval <= data_in;
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when others => -- do nothing
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end case;
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end if;
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end if;
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-- end if;
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-- end if;
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end case;
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end case;
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when PROCESS_ARP =>
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when PROCESS_ARP =>
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