OMAP-L138 DSP Software Interrupt

Alexey Tsirlin

Hi.

I am trying to generate interrupt in DSP by software (in order to test interrupt service routine). I have enabled the interrupt in IER register, and set the INTMUX register for correct event to interrupt connection. Then I am setting the event in event register by writing to EVTSET register, the EVTFLAG register gets "1" in corresponding event but the interrupt is not generated. I think that all the interrupt settings are correct, as when real "hardware" interrupt occurs, the interrupt is generated OK. Is it possible to generate software interrupt in a way I have presented?

Thanks, Alexey.

over 14 years ago

0 Gaurav Agarwal over 14 years ago

TI__Expert 3425 points

Software interrupts are generated using the functionalities provide by the DSP/BIOS operating system. I am moving this post to the DSP/BIOS forum so that it can be answered by the DSP/BIOS experts.

Thanks,
Gaurav

0 David Friedland over 14 years ago

TI__Mastermind 18320 points

Are you actually using BIOS in this application? If so, what version?

0 Alexey Tsirlin over 14 years ago in reply to David Friedland

Intellectual 555 points

No, I am not using BIOS.....

0 David Friedland over 14 years ago in reply to Alexey Tsirlin

TI__Mastermind 18320 points

OK, I am going to move this thread to a different forum in hopes of it getting a faster response.

0 tlee over 14 years ago

TI__Guru 62975 points

Alexey,

Are you using the Event Combiner or a dedicated interrupt line? Setting the event flag will only trigger an interrupt when using the Event Combiner:

http://e2e.ti.com/support/dsp/omap_applications_processors/f/42/t/61762.aspx

-Tommy

0 Alexey Tsirlin over 14 years ago in reply to tlee

Intellectual 555 points

Yes, I am using dedicated interrupt line, so I guess this is the source of the problem. I have found work around by setting interrupt flag of the DSP itself (IFR i think).

Thank you for the answer.

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OMAP-L138 DSP Software Interrupt