From 5723ec1a34181f1cfef9b8e870ab2e9a0362487c Mon Sep 17 00:00:00 2001
From: mindchasers <privateisland@mindchasers.com>
Date: Wed, 1 May 2019 18:16:45 -0400
Subject: initial commit, all basic functions work on Darsena V02

---
 source/ethernet_params.v | 38 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 38 insertions(+)
 create mode 100644 source/ethernet_params.v

(limited to 'source/ethernet_params.v')

diff --git a/source/ethernet_params.v b/source/ethernet_params.v
new file mode 100644
index 0000000..e974a05
--- /dev/null
+++ b/source/ethernet_params.v
@@ -0,0 +1,38 @@
+/*
+ *       ethernet_params.v
+ *
+ *   Copyright (C) 2018, 2019 Mind Chasers Inc.
+ *
+ *   Licensed under the Apache License, Version 2.0 (the "License");
+ *   you may not use this file except in compliance with the License.
+ *   You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *   Unless required by applicable law or agreed to in writing, software
+ *   distributed under the License is distributed on an "AS IS" BASIS,
+ *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *   See the License for the specific language governing permissions and
+ *   limitations under the License.
+ *   
+ *   function:	Ethernet related parameters
+ *		
+ */
+
+
+localparam MTU = 1520;	// Ethernet is actually 1500+framing (max 18)
+localparam IPG = 96; 	// Inter-packet Gap Bits
+
+localparam SZ_ETH_HEADER = 14;			// w/o VLAN
+localparam SZ_IPV4_HEADER = 20;			// w/o Options
+localparam SZ_UDP_HEADER = 8;
+
+localparam	TX_MODE_AN = 2'b00,
+TX_MODE_IDLE = 2'b01,
+TX_MODE_XMT_PKT = 2'b10,		// anything >= to this is a mode where a packet is transmitted
+TX_MODE_XMT_METRICS = 2'b11;
+
+// Note: The Length/Type field is transmitted and received with the high order octet first.
+localparam 	ETHER_TYPE_IPV4 = 16'h0800,
+ETHER_TYPE_IPV6 = 16'h86DD,
+ETHER_TYPE_ARP = 16'h0806;	
-- 
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