//////////////////////////////////////////////////////////////////////
//// ////
//// eth_defines.v ////
//// ////
//// This file is part of the Ethernet IP core project ////
//// http://opencores.org/project,ethmac ////
//// ////
//// Author(s): ////
//// - Igor Mohor (igorM@opencores.org) ////
//// ////
//// Modified by: ////
//// - Julius Baxter (julius@opencores.org) ////
//// ////
//////////////////////////////////////////////////////////////////////
//// ////
//// Copyright (C) 2001, 2002 Authors ////
//// ////
//// This source file may be used and distributed without ////
//// restriction provided that this copyright statement is not ////
//// removed from the file and that any derivative work contains ////
//// the original copyright notice and the associated disclaimer. ////
//// ////
//// This source file is free software; you can redistribute it ////
//// and/or modify it under the terms of the GNU Lesser General ////
//// Public License as published by the Free Software Foundation; ////
//// either version 2.1 of the License, or (at your option) any ////
//// later version. ////
//// ////
//// This source is distributed in the hope that it will be ////
//// useful, but WITHOUT ANY WARRANTY; without even the implied ////
//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR ////
//// PURPOSE. See the GNU Lesser General Public License for more ////
//// details. ////
//// ////
//// You should have received a copy of the GNU Lesser General ////
//// Public License along with this source; if not, download it ////
//// from http://www.opencores.org/lgpl.shtml ////
//// ////
//////////////////////////////////////////////////////////////////////
//`define ETH_BIST // Bist for usage with Virtual Silicon RAMS
`define ETH_MBIST_CTRL_WIDTH 3 // width of MBIST control bus
// Generic FIFO implementation - hopefully synthesizable with Synplify
`define ETH_FIFO_GENERIC
// Ethernet implemented in Xilinx Chips (uncomment following lines)
// `define ETH_FIFO_XILINX // Use Xilinx distributed ram for tx and rx fifo
// `define ETH_XILINX_RAMB4 // Selection of the used memory for Buffer descriptors
// Core is going to be implemented in Virtex FPGA and contains Virtex
// specific elements.
// Ethernet implemented in Altera Chips (uncomment following lines)
//`define ETH_ALTERA_ALTSYNCRAM
// Ethernet implemented in ASIC with Virtual Silicon RAMs
// `define ETH_VIRTUAL_SILICON_RAM // Virtual Silicon RAMS used storing buffer decriptors (ASIC implementation)
// Ethernet implemented in ASIC with Artisan RAMs
// `define ETH_ARTISAN_RAM // Artisan RAMS used storing buffer decriptors (ASIC implementation)
// Uncomment when Avalon bus is used
//`define ETH_AVALON_BUS
`define ETH_MODER_ADR 8'h0 // 0x0
`define ETH_INT_SOURCE_ADR 8'h1 // 0x4
`define ETH_INT_MASK_ADR 8'h2 // 0x8
`define ETH_IPGT_ADR 8'h3 // 0xC
`define ETH_IPGR1_ADR 8'h4 // 0x10
`define ETH_IPGR2_ADR 8'h5 // 0x14
`define ETH_PACKETLEN_ADR 8'h6 // 0x18
`define ETH_COLLCONF_ADR 8'h7 // 0x1C
`define ETH_TX_BD_NUM_ADR 8'h8 // 0x20
`define ETH_CTRLMODER_ADR 8'h9 // 0x24
`define ETH_MIIMODER_ADR 8'hA // 0x28
`define ETH_MIICOMMAND_ADR 8'hB // 0x2C
`define ETH_MIIADDRESS_ADR 8'hC // 0x30
`define ETH_MIITX_DATA_ADR 8'hD // 0x34
`define ETH_MIIRX_DATA_ADR 8'hE // 0x38
`define ETH_MIISTATUS_ADR 8'hF // 0x3C
`define ETH_MAC_ADDR0_ADR 8'h10 // 0x40
`define ETH_MAC_ADDR1_ADR 8'h11 // 0x44
`define ETH_HASH0_ADR 8'h12 // 0x48
`define ETH_HASH1_ADR 8'h13 // 0x4C
`define ETH_TX_CTRL_ADR 8'h14 // 0x50
`define ETH_RX_CTRL_ADR 8'h15 // 0x54
`define ETH_DBG_ADR 8'h16 // 0x58
`define ETH_MODER_DEF_0 8'h00
`define ETH_MODER_DEF_1 8'hA0
`define ETH_MODER_DEF_2 1'h0
`define ETH_INT_MASK_DEF_0 7'h0
`define ETH_IPGT_DEF_0 7'h12
`define ETH_IPGR1_DEF_0 7'h0C
`define ETH_IPGR2_DEF_0 7'h12
`define ETH_PACKETLEN_DEF_0 8'h00
`define ETH_PACKETLEN_DEF_1 8'h06
`define ETH_PACKETLEN_DEF_2 8'h40
`define ETH_PACKETLEN_DEF_3 8'h00
`define ETH_COLLCONF_DEF_0 6'h3f
`define ETH_COLLCONF_DEF_2 4'hF
`define ETH_TX_BD_NUM_DEF_0 8'h40
`define ETH_CTRLMODER_DEF_0 3'h0
`define ETH_MIIMODER_DEF_0 8'h64
`define ETH_MIIMODER_DEF_1 1'h0
`define ETH_MIIADDRESS_DEF_0 5'h00
`define ETH_MIIADDRESS_DEF_1 5'h00
`define ETH_MIITX_DATA_DEF_0 8'h00
`define ETH_MIITX_DATA_DEF_1 8'h00
`define ETH_MIIRX_DATA_DEF 16'h0000 // not written from WB
`define ETH_MAC_ADDR0_DEF_0 8'h00
`define ETH_MAC_ADDR0_DEF_1 8'h00
`define ETH_MAC_ADDR0_DEF_2 8'h00
`define ETH_MAC_ADDR0_DEF_3 8'h00
`define ETH_MAC_ADDR1_DEF_0 8'h00
`define ETH_MAC_ADDR1_DEF_1 8'h00
`define ETH_HASH0_DEF_0 8'h00
`define ETH_HASH0_DEF_1 8'h00
`define ETH_HASH0_DEF_2 8'h00
`define ETH_HASH0_DEF_3 8'h00
`define ETH_HASH1_DEF_0 8'h00
`define ETH_HASH1_DEF_1 8'h00
`define ETH_HASH1_DEF_2 8'h00
`define ETH_HASH1_DEF_3 8'h00
`define ETH_TX_CTRL_DEF_0 8'h00 //
`define ETH_TX_CTRL_DEF_1 8'h00 //
`define ETH_TX_CTRL_DEF_2 1'h0 //
`define ETH_RX_CTRL_DEF_0 8'h00
`define ETH_RX_CTRL_DEF_1 8'h00
`define ETH_MODER_WIDTH_0 8
`define ETH_MODER_WIDTH_1 8
`define ETH_MODER_WIDTH_2 1
`define ETH_INT_SOURCE_WIDTH_0 7
`define ETH_INT_MASK_WIDTH_0 7
`define ETH_IPGT_WIDTH_0 7
`define ETH_IPGR1_WIDTH_0 7
`define ETH_IPGR2_WIDTH_0 7
`define ETH_PACKETLEN_WIDTH_0 8
`define ETH_PACKETLEN_WIDTH_1 8
`define ETH_PACKETLEN_WIDTH_2 8
`define ETH_PACKETLEN_WIDTH_3 8
`define ETH_COLLCONF_WIDTH_0 6
`define ETH_COLLCONF_WIDTH_2 4
`define ETH_TX_BD_NUM_WIDTH_0 8
`define ETH_CTRLMODER_WIDTH_0 3
`define ETH_MIIMODER_WIDTH_0 8
`define ETH_MIIMODER_WIDTH_1 1
`define ETH_MIICOMMAND_WIDTH_0 3
`define ETH_MIIADDRESS_WIDTH_0 5
`define ETH_MIIADDRESS_WIDTH_1 5
`define ETH_MIITX_DATA_WIDTH_0 8
`define ETH_MIITX_DATA_WIDTH_1 8
`define ETH_MIIRX_DATA_WIDTH 16 // not written from WB
`define ETH_MIISTATUS_WIDTH 3 // not written from WB
`define ETH_MAC_ADDR0_WIDTH_0 8
`define ETH_MAC_ADDR0_WIDTH_1 8
`define ETH_MAC_ADDR0_WIDTH_2 8
`define ETH_MAC_ADDR0_WIDTH_3 8
`define ETH_MAC_ADDR1_WIDTH_0 8
`define ETH_MAC_ADDR1_WIDTH_1 8
`define ETH_HASH0_WIDTH_0 8
`define ETH_HASH0_WIDTH_1 8
`define ETH_HASH0_WIDTH_2 8
`define ETH_HASH0_WIDTH_3 8
`define ETH_HASH1_WIDTH_0 8
`define ETH_HASH1_WIDTH_1 8
`define ETH_HASH1_WIDTH_2 8
`define ETH_HASH1_WIDTH_3 8
`define ETH_TX_CTRL_WIDTH_0 8
`define ETH_TX_CTRL_WIDTH_1 8
`define ETH_TX_CTRL_WIDTH_2 1
`define ETH_RX_CTRL_WIDTH_0 8
`define ETH_RX_CTRL_WIDTH_1 8
// Outputs are registered (uncomment when needed)
`define ETH_REGISTERED_OUTPUTS
// Settings for TX FIFO
`define ETH_TX_FIFO_DATA_WIDTH 32
// Defines for ethernet TX fifo size - impacts FPGA resource usage
//`define ETH_TX_FULL_PACKET_FIFO // Full 1500 byte TX buffer - uncomment this
//`define ETH_TX_256BYTE_FIFO // 256 byte TX buffer - uncomment this
//`define ETH_TX_512BYTE_FIFO // 512 byte TX buffer - uncomment this
`define ETH_TX_1KBYTE_FIFO // 1024 byte TX buffer - uncomment this
`ifdef ETH_TX_FULL_PACKET_FIFO
`define ETH_TX_FIFO_CNT_WIDTH 9
`define ETH_TX_FIFO_DEPTH 375
`else
`ifdef ETH_TX_1KBYTE_FIFO
`define ETH_TX_FIFO_CNT_WIDTH 8
`define ETH_TX_FIFO_DEPTH 256
`else
`ifdef ETH_TX_512BYTE_FIFO
`define ETH_TX_FIFO_CNT_WIDTH 7
`define ETH_TX_FIFO_DEPTH 128
`else
`ifdef ETH_TX_256BYTE_FIFO
`define ETH_TX_FIFO_CNT_WIDTH 6
`define ETH_TX_FIFO_DEPTH 64
`else
// Default is 64 bytes
`define ETH_TX_FIFO_CNT_WIDTH 4
`define ETH_TX_FIFO_DEPTH 16
`endif
`endif
`endif // !`ifdef ETH_TX_512BYTE_FIFO
`endif // !`ifdef ETH_TX_FULL_PACKET_FIFO
// Settings for RX FIFO
`define ETH_RX_FIFO_CNT_WIDTH 8
`define ETH_RX_FIFO_DEPTH 256
//`define ETH_RX_FIFO_CNT_WIDTH 7
//`define ETH_RX_FIFO_DEPTH 128
//`define ETH_RX_FIFO_CNT_WIDTH 6
//`define ETH_RX_FIFO_DEPTH 64
//`define ETH_RX_FIFO_CNT_WIDTH 5
//`define ETH_RX_FIFO_DEPTH 32
//`define ETH_RX_FIFO_CNT_WIDTH 4
//`define ETH_RX_FIFO_DEPTH 16
`define ETH_RX_FIFO_DATA_WIDTH 32
// Burst length
`define BURST_4BEAT
`ifdef BURST_4BEAT
`define ETH_BURST_LENGTH 4 // Change also ETH_BURST_CNT_WIDTH
`define ETH_BURST_CNT_WIDTH 3 // The counter must be width enough to count to ETH_BURST_LENGTH
`endif
//`define ETH_BURST_LENGTH 32 // Change also ETH_BURST_CNT_WIDTH
//`define ETH_BURST_CNT_WIDTH 7 // The counter must be width enough to count to ETH_BURST_LENGTH
// Undefine this to enable bursting for RX (writing to memory)
`define ETH_RX_BURST_EN
// WISHBONE interface is Revision B3 compliant (uncomment when needed)
`define ETH_WISHBONE_B3
// Hack where the transmit logic polls each of the TX buffers instead of having to keep track of what's going on
//`define TXBD_POLL
// Define this to allow reading of the Wishbone control state machine on reg
// address 0x58
`define WISHBONE_DEBUG//////////////////////////////////////////////////////////////////////
//// ////
//// eth_defines.v ////
//// ////
//// This file is part of the Ethernet IP core project ////
//// http://opencores.org/project,ethmac ////
//// ////
//// Author(s): ////
//// - Igor Mohor (igorM@opencores.org) ////
//// ////
//// Modified by: ////
//// - Julius Baxter (julius@opencores.org) ////
//// ////
//////////////////////////////////////////////////////////////////////
//// ////
//// Copyright (C) 2001, 2002 Authors ////
//// ////
//// This source file may be used and distributed without ////
//// restriction provided that this copyright statement is not ////
//// removed from the file and that any derivative work contains ////
//// the original copyright notice and the associated disclaimer. ////
//// ////
//// This source file is free software; you can redistribute it ////
//// and/or modify it under the terms of the GNU Lesser General ////
//// Public License as published by the Free Software Foundation; ////
//// either version 2.1 of the License, or (at your option) any ////
//// later version. ////
//// ////
//// This source is distributed in the hope that it will be ////
//// useful, but WITHOUT ANY WARRANTY; without even the implied ////
//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR ////
//// PURPOSE. See the GNU Lesser General Public License for more ////
//// details. ////
//// ////
//// You should have received a copy of the GNU Lesser General ////
//// Public License along with this source; if not, download it ////
//// from http://www.opencores.org/lgpl.shtml ////
//// ////
//////////////////////////////////////////////////////////////////////
//`define ETH_BIST // Bist for usage with Virtual Silicon RAMS
`define ETH_MBIST_CTRL_WIDTH 3 // width of MBIST control bus
// Generic FIFO implementation - hopefully synthesizable with Synplify
`define ETH_FIFO_GENERIC
// Ethernet implemented in Xilinx Chips (uncomment following lines)
// `define ETH_FIFO_XILINX // Use Xilinx distributed ram for tx and rx fifo
// `define ETH_XILINX_RAMB4 // Selection of the used memory for Buffer descriptors
// Core is going to be implemented in Virtex FPGA and contains Virtex
// specific elements.
// Ethernet implemented in Altera Chips (uncomment following lines)
//`define ETH_ALTERA_ALTSYNCRAM
// Ethernet implemented in ASIC with Virtual Silicon RAMs
// `define ETH_VIRTUAL_SILICON_RAM // Virtual Silicon RAMS used storing buffer decriptors (ASIC implementation)
// Ethernet implemented in ASIC with Artisan RAMs
// `define ETH_ARTISAN_RAM // Artisan RAMS used storing buffer decriptors (ASIC implementation)
// Uncomment when Avalon bus is used
//`define ETH_AVALON_BUS
`define ETH_MODER_ADR 8'h0 // 0x0
`define ETH_INT_SOURCE_ADR 8'h1 // 0x4
`define ETH_INT_MASK_ADR 8'h2 // 0x8
`define ETH_IPGT_ADR 8'h3 // 0xC
`define ETH_IPGR1_ADR 8'h4 // 0x10
`define ETH_IPGR2_ADR 8'h5 // 0x14
`define ETH_PACKETLEN_ADR 8'h6 // 0x18
`define ETH_COLLCONF_ADR 8'h7 // 0x1C
`define ETH_TX_BD_NUM_ADR 8'h8 // 0x20
`define ETH_CTRLMODER_ADR 8'h9 // 0x24
`define ETH_MIIMODER_ADR 8'hA // 0x28
`define ETH_MIICOMMAND_ADR 8'hB // 0x2C
`define ETH_MIIADDRESS_ADR 8'hC // 0x30
`define ETH_MIITX_DATA_ADR 8'hD // 0x34
`define ETH_MIIRX_DATA_ADR 8'hE // 0x38
`define ETH_MIISTATUS_ADR 8'hF // 0x3C
`define ETH_MAC_ADDR0_ADR 8'h10 // 0x40
`define ETH_MAC_ADDR1_ADR 8'h11 // 0x44
`define ETH_HASH0_ADR 8'h12 // 0x48
`define ETH_HASH1_ADR 8'h13 // 0x4C
`define ETH_TX_CTRL_ADR 8'h14 // 0x50
`define ETH_RX_CTRL_ADR 8'h15 // 0x54
`define ETH_DBG_ADR 8'h16 // 0x58
`define ETH_MODER_DEF_0 8'h00
`define ETH_MODER_DEF_1 8'hA0
`define ETH_MODER_DEF_2 1'h0
`define ETH_INT_MASK_DEF_0 7'h0
`define ETH_IPGT_DEF_0 7'h12
`define ETH_IPGR1_DEF_0 7'h0C
`define ETH_IPGR2_DEF_0 7'h12
`define ETH_PACKETLEN_DEF_0 8'h00
`define ETH_PACKETLEN_DEF_1 8'h06
`define ETH_PACKETLEN_DEF_2 8'h40
`define ETH_PACKETLEN_DEF_3 8'h00
`define ETH_COLLCONF_DEF_0 6'h3f
`define ETH_COLLCONF_DEF_2 4'hF
`define ETH_TX_BD_NUM_DEF_0 8'h40
`define ETH_CTRLMODER_DEF_0 3'h0
`define ETH_MIIMODER_DEF_0 8'h64
`define ETH_MIIMODER_DEF_1 1'h0
`define ETH_MIIADDRESS_DEF_0 5'h00
`define ETH_MIIADDRESS_DEF_1 5'h00
`define ETH_MIITX_DATA_DEF_0 8'h00
`define ETH_MIITX_DATA_DEF_1 8'h00
`define ETH_MIIRX_DATA_DEF 16'h0000 // not written from WB
`define ETH_MAC_ADDR0_DEF_0 8'h00
`define ETH_MAC_ADDR0_DEF_1 8'h00
`define ETH_MAC_ADDR0_DEF_2 8'h00
`define ETH_MAC_ADDR0_DEF_3 8'h00
`define ETH_MAC_ADDR1_DEF_0 8'h00
`define ETH_MAC_ADDR1_DEF_1 8'h00
`define ETH_HASH0_DEF_0 8'h00
`define ETH_HASH0_DEF_1 8'h00
`define ETH_HASH0_DEF_2 8'h00
`define ETH_HASH0_DEF_3 8'h00
`define ETH_HASH1_DEF_0 8'h00
`define ETH_HASH1_DEF_1 8'h00
`define ETH_HASH1_DEF_2 8'h00
`define ETH_HASH1_DEF_3 8'h00
`define ETH_TX_CTRL_DEF_0 8'h00 //
`define ETH_TX_CTRL_DEF_1 8'h00 //
`define ETH_TX_CTRL_DEF_2 1'h0 //
`define ETH_RX_CTRL_DEF_0 8'h00
`define ETH_RX_CTRL_DEF_1 8'h00
`define ETH_MODER_WIDTH_0 8
`define ETH_MODER_WIDTH_1 8
`define ETH_MODER_WIDTH_2 1
`define ETH_INT_SOURCE_WIDTH_0 7
`define ETH_INT_MASK_WIDTH_0 7
`define ETH_IPGT_WIDTH_0 7
`define ETH_IPGR1_WIDTH_0 7
`define ETH_IPGR2_WIDTH_0 7
`define ETH_PACKETLEN_WIDTH_0 8
`define ETH_PACKETLEN_WIDTH_1 8
`define ETH_PACKETLEN_WIDTH_2 8
`define ETH_PACKETLEN_WIDTH_3 8
`define ETH_COLLCONF_WIDTH_0 6
`define ETH_COLLCONF_WIDTH_2 4
`define ETH_TX_BD_NUM_WIDTH_0 8
`define ETH_CTRLMODER_WIDTH_0 3
`define ETH_MIIMODER_WIDTH_0 8
`define ETH_MIIMODER_WIDTH_1 1
`define ETH_MIICOMMAND_WIDTH_0 3
`define ETH_MIIADDRESS_WIDTH_0 5
`define ETH_MIIADDRESS_WIDTH_1 5
`define ETH_MIITX_DATA_WIDTH_0 8
`define ETH_MIITX_DATA_WIDTH_1 8
`define ETH_MIIRX_DATA_WIDTH 16 // not written from WB
`define ETH_MIISTATUS_WIDTH 3 // not written from WB
`define ETH_MAC_ADDR0_WIDTH_0 8
`define ETH_MAC_ADDR0_WIDTH_1 8
`define ETH_MAC_ADDR0_WIDTH_2 8
`define ETH_MAC_ADDR0_WIDTH_3 8
`define ETH_MAC_ADDR1_WIDTH_0 8
`define ETH_MAC_ADDR1_WIDTH_1 8
`define ETH_HASH0_WIDTH_0 8
`define ETH_HASH0_WIDTH_1 8
`define ETH_HASH0_WIDTH_2 8
`define ETH_HASH0_WIDTH_3 8
`define ETH_HASH1_WIDTH_0 8
`define ETH_HASH1_WIDTH_1 8
`define ETH_HASH1_WIDTH_2 8
`define ETH_HASH1_WIDTH_3 8
`define ETH_TX_CTRL_WIDTH_0 8
`define ETH_TX_CTRL_WIDTH_1 8
`define ETH_TX_CTRL_WIDTH_2 1
`define ETH_RX_CTRL_WIDTH_0 8
`define ETH_RX_CTRL_WIDTH_1 8
// Outputs are registered (uncomment when needed)
`define ETH_REGISTERED_OUTPUTS
// Settings for TX FIFO
`define ETH_TX_FIFO_DATA_WIDTH 32
// Defines for ethernet TX fifo size - impacts FPGA resource usage
//`define ETH_TX_FULL_PACKET_FIFO // Full 1500 byte TX buffer - uncomment this
//`define ETH_TX_256BYTE_FIFO // 256 byte TX buffer - uncomment this
//`define ETH_TX_512BYTE_FIFO // 512 byte TX buffer - uncomment this
`define ETH_TX_1KBYTE_FIFO // 1024 byte TX buffer - uncomment this
`ifdef ETH_TX_FULL_PACKET_FIFO
`define ETH_TX_FIFO_CNT_WIDTH 11
`define ETH_TX_FIFO_DEPTH 375
`else
`ifdef ETH_TX_1KBYTE_FIFO
`define ETH_TX_FIFO_CNT_WIDTH 9
`define ETH_TX_FIFO_DEPTH 256
`else
`ifdef ETH_TX_512BYTE_FIFO
`define ETH_TX_FIFO_CNT_WIDTH 8
`define ETH_TX_FIFO_DEPTH 128
`else
`ifdef ETH_TX_256BYTE_FIFO
`define ETH_TX_FIFO_CNT_WIDTH 7
`define ETH_TX_FIFO_DEPTH 64
`else
// Default is 64 bytes
`define ETH_TX_FIFO_CNT_WIDTH 5
`define ETH_TX_FIFO_DEPTH 16
`endif
`endif
`endif // !`ifdef ETH_TX_512BYTE_FIFO
`endif // !`ifdef ETH_TX_FULL_PACKET_FIFO
// Settings for RX FIFO
`define ETH_RX_FIFO_CNT_WIDTH 9
`define ETH_RX_FIFO_DEPTH 256
//`define ETH_RX_FIFO_CNT_WIDTH 8
//`define ETH_RX_FIFO_DEPTH 128
//`define ETH_RX_FIFO_CNT_WIDTH 7
//`define ETH_RX_FIFO_DEPTH 64
//`define ETH_RX_FIFO_CNT_WIDTH 6
//`define ETH_RX_FIFO_DEPTH 32
//`define ETH_RX_FIFO_CNT_WIDTH 5
//`define ETH_RX_FIFO_DEPTH 16
`define ETH_RX_FIFO_DATA_WIDTH 32
// Burst length
`define BURST_4BEAT
`ifdef BURST_4BEAT
`define ETH_BURST_LENGTH 4 // Change also ETH_BURST_CNT_WIDTH
`define ETH_BURST_CNT_WIDTH 3 // The counter must be width enough to count to ETH_BURST_LENGTH
`endif
//`define ETH_BURST_LENGTH 32 // Change also ETH_BURST_CNT_WIDTH
//`define ETH_BURST_CNT_WIDTH 7 // The counter must be width enough to count to ETH_BURST_LENGTH
// Undefine this to enable bursting for RX (writing to memory)
`define ETH_RX_BURST_EN
// WISHBONE interface is Revision B3 compliant (uncomment when needed)
`define ETH_WISHBONE_B3
// Hack where the transmit logic polls each of the TX buffers instead of having to keep track of what's going on
//`define TXBD_POLL
// Define this to allow reading of the Wishbone control state machine on reg
// address 0x58
`define WISHBONE_DEBUGError running this command: diff -w -U 5 "" ""
diff: : No such file or directory
diff: : No such file or directory