- packet size reduced by 4 if fcs-check is enabled

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git-svn-id: http://moon:8086/svn/vhdl/trunk@898 cc03376c-175c-47c8-b038-4cd826a8556b

lib/emac/src/emac_rx.vhd

@@ -267,7 +267,11 @@ byte_counter:
 	begin
 		if rising_edge(mii_rx_clk) then
 			if byte_count_rst = '1' then
-				byte_count		<= (others => '0');
+				if fcs_chk_en = '0' then
+					byte_count		<= to_unsigned(0, RAM_ADDR_WIDTH);
+				else
+					byte_count		<= unsigned(to_signed(-4, RAM_ADDR_WIDTH));
+				end if;
 			elsif sipo32_en = '1' and sipo32_din_vld = '1' then
 				byte_count		<= byte_count + 1;
 			end if;