Re: [microblaze-uclinux] Ethernet problem whith FX12MM from Memec

[John Williams <jwilliams@xxxxxxxxxxxxxx>]

Rasmus Mattsson wrote:

> the petalinux is configured to connet to a DHCP server but right now i
> don't use any server for the PI address. the ip address is defined
> with ipconfig (see the txt file for more info)
>
> info in /proc/net/arp on petalinux:
> IP address       HW type     Flags       HW address            Mask     
> Device
> 192.168.11.5     0x1         0x2         00:00:1C:B5:EB:4B     *        
> eth0

So, it looks like the microblaze is receiving ARP packets OK (it knows 
the MAC address of the host)

> info in /proc/net/arp on the server:
> IP address       HW type     Flags       HW address            Mask     
> Device
> 192.168.11.99     0x1         0x2        00:00:C0:A3:E5:44    *        eth0

and your switch is working - the host knows the MAC address of the 
microblaze board.

So the  low level ARP packaets are being received fine, it's ICMP, UDP 
and TCP that's not working.

Try disabling SGDMA mode on the ethernet controller.  Edit your 
auto-config.in file, look for the CONFIG_XILINX_ETHERNET_DMA_MODE 
parameter, and change it from 3 (DMA) to 1 (FIFO) mode.

run "make oldconfig", then rebuild the kernel.

> I have Attached a txt file with the bootup info and all commands that
> I execute in petalinux. When i look closer to this boot process i see
> a strange message on line 6:
> Kernel command line: 'J}0$\$XH$,Q|'Kp,    is this expected? (i have to
> admit that I'm new to Linux)

It just means that the bootloader is providing a garbage command line to 
the kernel.  Are you using u-boot, or something else?  Anyway it's 
something to fix for completeness, but won't be doing any harm.

Regards,

John
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