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Link error with CpIntc_dispatch in the CFG file

Clement FR
Genius 4750 points
Other Parts Discussed in Thread: SYSBIOS

Hello all,

(target c6678, sysbios 6.37, XDC tools 3.25, CCSv6 .98, compiler 7.4.5)

In my CFG I have

xdc.useModule('ti.sysbios.family.c66.tci66x.CpIntc');
xdc.useModule('ti.sysbios.family.c64p.Hwi');

...

Hwi.create(11, "&CpIntc_dispatch", hwi_params);

In my C file

#include <ti/sysbios/family/c66/tci66xx/CpIntc.h>
#include <ti/sysbios/family/c64p/Hwi.h>

But when I compile I get a link error saying that

the symbol CpIntc_dispatch is not found.

If I do the HWI creation at runtime (still with CpIntc_dispatch) it links.

I don't get it.

Thank you

Clement

  • 0
    TI__Expert 8175 points

    Clement,

    The CpIntc_dispatch is your Hwi(ISR) function. Do you have the function defined in your application? The linker will complain if it can't find that function defined elsewhere in your application.

    Moses

  • 0 in reply to Moses Isang
    Genius 4750 points

    Moses,

    CpIntc_dispatch is a TI SYSBIOS CpIntc function. It is defined in CpIntc.c, provided by TI. 
    Therefore i can't "define" it in my application.

    It's usage is recommended here :

    http://processors.wiki.ti.com/index.php/Configuring_Interrupts_on_Keystone_Devices

    The example code works for runtime creation but static configuration fails.

    Clement

  • 0 in reply to Clement FR
    TI__Mastermind 21645 points

    Hi Clement,

    The right way to register CpIntc_dispatch() as a Hwi function in the cfg file is as follows:

    Hwi.create(11, CpIntc.dispatch, hwi_params);

    However, it looks like there is a mismatch between the function signatures of CpIntc_dispatch() and Hwi function which will cause a build failure. A workaround is to use the full function name as follows:

    Hwi.create(11, "&ti_sysbios_family_c66_tci66xx_CpIntc_dispatch__E", hwi_params);

    I have filed a bug to fix the function signature. Here's the link to the bug:

    https://cqweb.ext.ti.com/cqweb/main?command=GenerateMainFrame&service=CQ&schema=SDO-Web&contextid=SDOWP&entityID=SDOCM00112060&entityDefName=IncidentReport&username=readonly&password=readonly

    Best,

    Ashish

  • 0 in reply to Ashish Kapania
    Genius 4750 points

    Hi Ashish,

    Thank you for your reply.

    I'll try your workaround.

    To my knowledge, CpIntc.dispatch use in the CFG is not described anywhere in the documentation (neither cdoc nor wiki). You may want to file a documentation problem report for that.


    Clement

  • 0 in reply to Clement FR
    TI__Mastermind 21645 points

    Hi Clement,

    I agree, the cdoc should include a cfg script example. I have updated the bug to also add a cfg example to the C66 CpIntc cdoc.

    Best,

    Ashish

  • 0 in reply to Ashish Kapania
    Genius 4750 points

    Thank you Ashish.

    I confirm it works with "&ti_sysbios_family_c66_tci66xx_CpIntc_dispatch__E"

    For others reading this :

    in Tools -> RTOS Object View there is very useful information about how you configured CpIntc.

    On my side I consider this thread closed.

    Clement