Getting LwIP working (MDIO can't read ID)

Jeremy Spiller

Other Parts Discussed in Thread: HALCOGEN

I used Halcogen 3.05 to get this link: http://processors.wiki.ti.com/index.php/HALCoGen_Ethernet_Driver_and_lwIP_Integration_Demonstration and downloaded the LwIP project from there.

In "jdkif.c" (the texas instruments HAL for LwIP) the function hdkif_hw_init calls Dp83640IDGet. That function always returns zero, and initialization fails. Dp83640IDGet calls MDIOPhyRegRead. At line 64 of mdio.c, it always falls through to "return FALSE" at line 71. I used HalCoGen as specified in the training video (checked all the MDIO bits, enabled EMAC, etc)

Any ideas on what I need to do to get MDIO working?

over 12 years ago

0 QJ Wang over 12 years ago

TI__Guru**** 196206 points

Hi Jeremy,

I have forwarded your post to one of our experts on lwip demo. He will be responding soon.

Regards,

0 erik sellgren over 12 years ago in reply to QJ Wang

Prodigy 30 points

I am having the same issue I think, how did you debug all this to see what its doing and where its falling through etc???

0 Jeremy Spiller over 12 years ago in reply to erik sellgren

Prodigy 150 points

It turns out that there are some DIP switches on the board that enable/disable the Ethernet and USB ports. Once I set the DIP switches properly, everything worked.

BTW, if you're using LwIP with the TI driver, there's a serious flaw that can hang TCP connections. I posted the fix on this thread: http://e2e.ti.com/support/microcontrollers/hercules/f/312/t/255152.aspx

-Jeremy

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Getting LwIP working (MDIO can't read ID)