K64F: System stops when ethernet cable isn't plugged in

[tobiaswellnitz]

Hi,

I was playing around with the WebServer example (for FreeRTOS), with the SDK 2.0. I noted the uC execution is aborted when I initialise the interface (netif) and the ethernet connector is not plugged in.

This seems to be a bit unfortunate, since I have another task which handles some basic IO Input.

Investigating this issue with the debugger, shows me that the problem is within the PHY initialization (fsl_phy.c). In particular in PHY_Init().

PHY_Init() - line 84/85:

result = PHY_Write(base, phyAddr, PHY_BASICCONTROL_REG,

    (PHY_BCTL_AUTONEG_MASK | PHY_BCTL_RESTART_AUTONEG_MASK));

How can I initialise Ethernet / lwip without depending on a physically connected cable?

I presume the auto negotiation has to be replaced with fixed values, right?

Thanks,

Tobias

[butok · Accepted solution]

Hi Tobias,

Please disable the assert in ethernetif.c, low_level_init():

#if 0 /* Disable assert. If initial auto-negation is timeout,

        the ENET set to default 100Mbs and full-duplex.*/

    if (count == ENET_TIMEOUT)

    {

        LWIP_ASSERT("\r\nPHY Link down, please check the cable connection.\r\n", 0);

    }

#endif

It must help.

Best regards,

Andrey Butok

[tobiaswellnitz]

Thanks Andrey,

this did the trick.

Tobias

[Kan_Li]

Hi Tobias,

I have reported this to the KSDK team, and they are going to fix it in the next release. Thanks for your patience!

Have a great day,
Kan

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[Kan_Li]

Hi Tobias,

Which platform did you run the webserver from ksdk 2.0? Would you please help to clarify? Thanks for your patience!

Have a great day,
Kan

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[tobiaswellnitz]

Hey Kan,

The Platform is an K64F freedom board.

Thanks,

Tobias

Am 10.03.2016 um 07:32 schrieb Kan_Li <admin@community.freescale.com>:

NXP Community

K64F: System stops when ethernet cable isn't plugged in

reply from Kan_Li in Kinetis Software Development Kit - View the full discussion

Hi Tobias,

Which platform did you run the webserver from ksdk 2.0? Would you please help to clarify? Thanks for your patience!

Have a great day,

Kan

>