Honored Contributor
Honored ContributorHi,
I am also trying to modify the Wishbone Ethernet IP core to be implemented in Quartus and SOPC Builder. I have run the verilog codes in the "rtl\verilog" folder in Quartus and it runs without any errors and warnings. I was advised before this to modify the eth_wishbone.v file by dropping the wishbone bus interface and adding the avalon bus interface. While I was studying this file, I saw that some part of it did support Avalon, such as the code: `ifdef ETH_AVALON_BUS .......... endif And also I tried to identify the various Wishbone signals for Wishbone common, Wishbone slave and Wishbone master, and finding the corresponding compatible signals in Avalon such as chipselect, waitrequest, byteenable, ....etc. While I did take out some seems unused signals by Avalon such as those error signals : err_<>_ and m_wb_cti_o and m_wb_bte_o. And i also dropped off those with `ifdef ETH_WISHBONE_B3 endif I really not sure whether I am doing the correct way. Then once the file is compiled without syntax errors(though, ..) , I tried to create a new component in SOPC Builder using Component Editors. Once the signals are loaded in the Signals Tab, I tried to set the signal types such as whether it is "avalon_slave" or " avalon_master" and whether it is a " chipselect" ,"begintransfer", "byteenable"...etc. But there are some signals, I don't know whether it belongs to " avalon_slave " or "avalon_master" such as those going to and coming from PHY chip as follows: (So I just see whether these signals is coming from PHY into a slave , so I put "avalon_slave" , "input" as "export" , or "global signals" as "export") input InvalidSymbol; // Invalid symbol was received during reception in //100 Mbps mode input LatchedCrcError; // CRC error input RxLateCollision; // Late collision occured while receiving frame input ShortFrame; // Frame shorter then the minimum size (r_MinFL) was received while small packets are enabled (r_RecSmall) input DribbleNibble; // Extra nibble received input ReceivedPacketTooBig;// Received packet is bigger than r_MaxFL input [15:0] RxLength; // Length of the incoming frame input LoadRxStatus; // Rx status was loaded input ReceivedPacketGood;// Received packet's length and CRC are good input AddressMiss; // When a packet is received AddressMiss status is written to the Rx BD input r_RxFlow; input r_PassAll; input ReceivedPauseFrm; // Tx Status signals input [3:0] RetryCntLatched; // Latched Retry Counter input RetryLimit; // Retry limit reached (Retry Max value + 1 attempts //were made) input LateCollLatched; // Late collision occured input DeferLatched; // Defer indication (Frame was defered before //sucessfully sent) output RstDeferLatched; input CarrierSenseLost; // Carrier Sense was lost during the frame //transmission // Tx input MTxClk; // Transmit clock (from PHY) input TxUsedData; // Transmit packet used data input TxRetry; // Transmit packet retry input TxAbort; // Transmit packet abort input TxDone; // Transmission ended output TxStartFrm; // Transmit packet start frame output TxEndFrm; // Transmit packet end frame output [7:0] TxData; // Transmit packet data byte output TxUnderRun; // Transmit packet under-run output PerPacketCrcEn; // Per packet crc enable output PerPacketPad; // Per packet pading // Rx input MRxClk; // Receive clock (from PHY) input [7:0] RxData; // Received data byte (from PHY) input RxValid; // input RxStartFrm; // input RxEndFrm; // input RxAbort; // This signal is set when address doesn't match. output RxStatusWriteLatched_sync2; //Register input r_TxEn; // Transmit enable input r_RxEn; // Receive enable input [7:0] r_TxBDNum; // Transmit buffer descriptor number // Interrupts output TxB_IRQ; output TxE_IRQ; output RxB_IRQ; output RxE_IRQ; output Busy_IRQ; // Bist `ifdef ETH_BIST input mbist_si_i; // bist scan serial in output mbist_so_o; // bist scan serial out input [`ETH_MBIST_CTRL_WIDTH - 1:0] mbist_ctrl_i; // bist chain shift control `endif At first, I assign the wb_stb to avalon "chipselect" , and wb_cyc to avalon "begintransfer", and wb_sel to avalon "byteenable", after I have studied the Wishbone specs and Avalon specs, and assigned based on my understanding. But I came across a topic in this Forum, that Mr./Mrs. slava stated that " wb_stb" and "wb_cyc" can be tied together in the Verilog code file itself. So how to do or write the code of combining the wb_stb and wb_cyc to behave as avalon "chipselect". Also, there is also a suggestion posted on using avalon naming : avs_(avalon valid slave) and avm_(avalon valid master), so do I write these naming in the Verilog file, changing wishbone "m_wb_<signalname> " to "avm_<signalname>. How do these suggestions , come into play in my initial problem of implementing Ethernet IP core in Avalon SOPC? I not sure whether I am doing the correct way, since I am still a new comer in Verilog and also Ethernet IP, therefore I need someone, some of you, who could kindly enlighten me. I really need help desperately.
