Re: Porting DE_NET2 to NIOSII running on Quartus 12.1sp1 and QSYS

Altera_Forum · ‎04-04-2014

Hi,

I'm trying to port DE_NET2 to Quartus 12.1sp1 and QSYS.

I have created in QSYS dm9000a component based on DM9000A_IF.v file. The code:


module DM9000A_IF(    //    HOST Side
                    iDATA,
                    oDATA,
                    iCMD,
                    iRD_N,
                    iWR_N,
                    iCS_N,
                    iRST_N,
                    iCLK,
                    iOSC_50,
                    oINT,
                    //    DM9000A Side
                    ENET_DATA,
                    ENET_CMD,
                    ENET_RD_N,
                    ENET_WR_N,
                    ENET_CS_N,
                    ENET_RST_N,
                    ENET_INT,
                    ENET_CLK    );
//    HOST Side
input        iDATA;
input            iCMD;
input            iRD_N;
input            iWR_N;
input            iCS_N;
input            iRST_N;
input            iCLK;
input            iOSC_50;
output        oDATA;
output            oINT;
//    DM9000A Side
inout        ENET_DATA;
output            ENET_CMD;
output            ENET_RD_N;
output            ENET_WR_N;
output            ENET_CS_N;
output            ENET_RST_N;
output            ENET_CLK;
input            ENET_INT;
reg            TMP_DATA;
reg                ENET_CMD;
reg                ENET_RD_N;
reg                ENET_WR_N;
reg                ENET_CS_N;
reg                ENET_CLK;
reg            oDATA;
reg                oINT;
assign    ENET_DATA    =    ENET_WR_N    ?    16'hzzzz    :    TMP_DATA;
always@(posedge iCLK or negedge iRST_N)
begin
    if(!iRST_N)
    begin
        TMP_DATA     <=    0;
        ENET_CMD     <=    0;
        ENET_RD_N     <=    1;
        ENET_WR_N     <=    1;
        ENET_CS_N     <=    1;
        oDATA        <=    0;
        oINT        <=    0;
    end
    else
    begin
        oDATA        <=    ENET_DATA;
        oINT        <=    ENET_INT;
        TMP_DATA     <=    iDATA;
        ENET_CMD     <=    iCMD;
        ENET_CS_N     <=    iCS_N;
        ENET_RD_N     <=    iRD_N;
        ENET_WR_N     <=    iWR_N;
    end
end
always@(posedge iOSC_50)
ENET_CLK    <=    ~ENET_CLK;
assign    ENET_RST_N    =    iRST_N;
endmodule

Here's the componet overview:

https://www.alteraforum.com/forum/attachment.php?attachmentid=8694

Timing was taken from old DM9000A class.ptf.

Based on those settings I get in signal tap this results:

https://www.alteraforum.com/forum/attachment.php?attachmentid=8695

when executing this code on NIOS:

# define IO_addr     0# define IO_data     1
iow(0x1E, 0x01);
void iow(unsigned int reg, unsigned int data)
{
 IOWR(DM9000A_BASE,IO_addr,reg);
 usleep(STD_DELAY);
 IOWR(DM9000A_BASE,IO_data,data);
}

Value of reg 0x1E goes to the bus.

Also CMD going up was rather strange. So in the second try I have changed address units WORD to SYMBOLS in my component. And here's the result:

https://www.alteraforum.com/forum/attachment.php?attachmentid=8696

Now I can even write the whole 16 bits at once, and CMD is gone. I suppose that it's not good that I get two 16 bit writes to the DM9000a. Perhaps it's related to the 32 bits that gets written by NIOS so it gives two clock cycles. I have provided only 16 bits, rest all zero. So my questions are:

1) How to make only one 16 bit write ?

2) The second IOWR(DM9000A_BASE,IO_data,data) - so writing the data (CMD should be high) never goes to the bus, CMD is always low. Any ideas why ?

https://www.alteraforum.com/forum/attachment.php?attachmentid=8697

I add DM9000A_hw.tcl packed in zip, so you can easily open it in QSYS and see my component. Also I have uploaded the whole project to Dropbox:

https://www.dropbox.com/s/6ru77wyptaxcfdc/fpga_imgproc.rar

Thanks in advance,

Best regards,

madness

Altera_Forum · ‎04-05-2014

Hi,

I was able to make it running.

I have made no changes to NIOS code except changing this define:

#define IO_data 4

Also in the code the DM9000A.C file was included, which is rather bad so I only included .h file

and had to move ether_addr table to .C file from .h.

In my DM9000A component i have changed iDATA and oDATA to 32 bit and simply assigned

lower 16 bits to ENET_DATA.

I also resized iCMD to 8 bits and found out that bit 4 goes up when I write.

So i simply assigned this bit to ENET_CMD.

Also I changed read wait and write wait to 3 clock cycles in my DM9000A component (it's related to 100MHz clock for NIOS).

Best,

madness

Altera_Forum · ‎04-06-2014

--- Quote Start ---

Hi,

I was able to make it running.

I have made no changes to NIOS code except changing this define:

#define IO_data 4

Also in the code the DM9000A.C file was included, which is rather bad so I only included .h file

and had to move ether_addr table to .C file from .h.

In my DM9000A component i have changed iDATA and oDATA to 32 bit and simply assigned

lower 16 bits to ENET_DATA.

I also resized iCMD to 8 bits and found out that bit 4 goes up when I write.

So i simply assigned this bit to ENET_CMD.

Also I changed read wait and write wait to 3 clock cycles in my DM9000A component (it's related to 100MHz clock for NIOS).

Best,

madness

--- Quote End ---

Is it true that regardless of the actual PHY chip, the mdio interface is common, and the device specific initialization is done in software?

If so, couldn't an existing built-in qsys component (ex. LAN91C111) be instantiated, but registers initialized for the DM9000A?

EDIT: Since these chips have MACs built-in to them, why is another MAC (Altera's TSE) added into the system design... how does that even work?

Altera_Forum · ‎04-19-2014

--- Quote Start ---

Is it true that regardless of the actual PHY chip, the mdio interface is common, and the device specific initialization is done in software?

If so, couldn't an existing built-in qsys component (ex. LAN91C111) be instantiated, but registers initialized for the DM9000A?

EDIT: Since these chips have MACs built-in to them, why is another MAC (Altera's TSE) added into the system design... how does that even work?

--- Quote End ---

Hi happy,

Where can I find LAN91C111 qsys component ? Is it ported to new quartus version ?

Your statement about mdio does make sens.

I don't see Altera TSE mac in the design that I posted.

Best,

madness