SysBios exception

zhimin hu

Other Parts Discussed in Thread: SYSBIOS

Hi folks,

I am triying to use the exception handler that is plugged by default by bios6, however I can not run into the exception handler function. here is my configuration:

var Exception = xdc.useModule('ti.sysbios.family.c64p.Exception');

Exception.enablePrint = true;

Exception.nmiHook = '&myExcHookFxn';

var Hwi = xdc.useModule('ti.sysbios.family.c64p.Hwi');

However, when an internal exception,the myExcHookFxn()function is not being called,

Do you know why? Could you give me an example project about exception of sysbios? Thank you!

Regards,

Jimmy

over 13 years ago

0 David Friedland over 13 years ago

TI__Mastermind 18320 points

Jimmy,

What device are you using?

And what exactly is the internal exception that occurs that you think should trigger the hook function?

0 Karl Wechsler over 13 years ago in reply to David Friedland

TI__Mastermind 20805 points

Hi Jimmy --

I think you are using the wrong hook. The nmiHook is called if NMI occurs. The NMI vector is shared between NMI and exceptions and our exception module decodes some register to determine the source (NMI, internal, external). User can hook into any of these 3 points with a function. We first decode the internal or external exception and print some information before calling the user hook.

I think you need to set 'Exception.internalHook' instead of the 'nmiHook'. The exception code is provided in the ti/sysbios/family/c64p if you want to reference it and see how/when each hook is called.

Regards,
-Karl-

0 zhimin hu over 13 years ago in reply to David Friedland

Prodigy 50 points

Hi,David:

The device i use is TCI6616.

The internal exception i manul triger is a fetch operation exception.

0 zhimin hu over 13 years ago in reply to Karl Wechsler

Prodigy 50 points

Hi,Karl:

You are right,I use the 'exception.exceptionHook' instead of the 'nmihook',it can work as my expection.

Thank you cery much!

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SysBios exception