Re: [lwip-users] Xilinx PowerPC receive udp messages

[Peter Kampmann]

Problem is "solved", just tried to compile the code with the fresh EDK 8.2
and I get no errors :)

Regards,
Peter



Peter Kampmann wrote:
> 
> Thanks for your replies.
> 
> Perhaps there is a misunderstanding, all the lwip source files have the
> extern C Wrapping. 
> I tried the example code from Sathya and all worked fine. Then I use the
> same project and add another
> Application to it, then switched the Compiler to g++ and started to
> develop the c++ code.
> When coming to the point where I have to register the Interrupt using this
> code fragment from the source code from Sathya's example:
> 
> XIntc_RegisterHandler(XPAR_OPB_INTC_0_BASEADDR,
>                        XPAR_OPB_INTC_0_ETHERNET_MAC_IP2INTC_IRPT_INTR,
>                        (XInterruptHandler)XEmac_IntrHandlerFifo,
>                         xemacif_ptr->instance_ptr);
> 
> I get the error is: undefined reference to `XEmac_IntrHandlerFifo' 
> 
> After that, I tried some experiments with declaring the example code as
> extern C. I hoped then I could call this within the C++ code, but that
> gives the same error. 
> 
> Regards,
> Peter
> 
> 
> Sathya Thammanur wrote:
>> 
>> Hi Peter,
>> Matthew is right. Check if your ethernet interrupts are connected
>> correctly
>> and enabled accordingly. All the drivers code from EDK are wrapped with
>> extern C, so this shouldnt be an issue.
>> 
>> Sathya
>> 
>> 
>> On 8/23/06, Matthew Yingling <address@hidden> wrote:
>>>
>>> Is your hardware connected properly?
>>>
>>> In order for the EDK to properly detect the use of interrupts for
>>> Ethernet,
>>> you need to connect your Ethernet interrupt output to an interrupt
>>> controller or directly to your processor.  Otherwise it won't even try
>>> to
>>> link the interrupt code for the EMAC.
>>>
>>> Matthew Yingling
>>>
>>> -----Original Message-----
>>> From: address@hidden
>>> [mailto:address@hidden Behalf Of
>>> Peter Kampmann
>>> Sent: Wednesday, August 23, 2006 7:28 AM
>>> To: address@hidden
>>> Subject: Re: [lwip-users] Xilinx PowerPC receive udp messages
>>>
>>>
>>>
>>>
>>> Pedro Alves-6 wrote:
>>> >
>>> > A few ideas:
>>> >
>>> > 1)
>>> >
>>> > You wrapped this? :
>>> >  > XIntc_RegisterHandler(XPAR_OPB_INTC_0_BASEADDR,
>>>
>>> >  >                       
>>> XPAR_OPB_INTC_0_ETHERNET_MAC_IP2INTC_IRPT_INTR,
>>> >  >                        (XInterruptHandler)XEmac_IntrHandlerFifo,
>>> >  >                         xemacif_ptr->instance_ptr);
>>> >
>>> > or the declaration of XEmac_IntrHandlerFifo?
>>> >
>>>
>>> I wrapped the file that includes the above call
>>> XIntc_RegisterHandler(..)
>>> but that did not help.
>>> All files in lwip and the xilinx emac seem to have the
>>>
>>> #ifdef __cplusplus
>>> extern "C" { ...
>>>
>>> around their headers.
>>>
>>>
>>> Pedro Alves-6 wrote:
>>> >
>>> > You need to wrap XEmac_IntrHandlerFifo.
>>> >
>>> > No idea what the function looks like, but probably like this?
>>> > extern "C" void XEmac_IntrHandlerFifo(void*);
>>> >
>>> > 2)
>>> > Is the function really defined?
>>> > Try checking with the map file, if you have one,
>>> > or with something equivalent of nm or objdump.
>>> >
>>>
>>> The function is defined, when I use Ctrl+clicking onto
>>> XEmac_IntrHandlerFifo
>>> the Platform Studio SDK points me to the function, which is located in
>>> xemac.c.
>>> But the linker does not find it ...
>>>
>>> Regards,
>>> Peter
>>>
>>>
>>> Pedro Alves-6 wrote:
>>> >
>>> > Cheers,
>>> > Pedro Alves
>>> >
>>> >
>>> > _______________________________________________
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>>> > address@hidden
>>> > http://lists.nongnu.org/mailman/listinfo/lwip-users
>>> >
>>> >
>>> >
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