A problem with hardware Interrupt. Only HWI7 to HWI 10 receives Interrupt.

lijesh k

Intellectual 420 points

Hi All,

I am facing a problem with hardware Interrupt. I have a project that does video processing.

I have added McBSP SPI to the project in Interrupt mode using CSL.

When I use the unused(HWI4 - HWI6, HWI13 etc) interrupt, I am not able to receive the SPI interrupt.

If I use HWI7 I can receive the receive interrupt. The video processing program process video frames.

But the video is corrupted!

Please help me to solve this issue.

From the .tci file I can see HWI7-to HWI10 is used. in ECM configuration.

I have no idea about this.

/* Enable ECM Handler */
bios.ECM.ENABLE = 1;

/* ECM configuration - manually Reflect these settings in soc.h */
bios.HWI.instance("HWI_INT7").interruptSelectNumber = 0;
bios.HWI.instance("HWI_INT8").interruptSelectNumber = 1;
bios.HWI.instance("HWI_INT9").interruptSelectNumber = 2;
bios.HWI.instance("HWI_INT10").interruptSelectNumber = 3;

Thanks

Lijesh

over 14 years ago

0 Brad Griffis over 14 years ago

TI__Guru*** 125430 points

Interrupts 4-15 all work in exactly the same way, so the only reason I can think of where it would work for INT7 but not work for others would be if those other interrupts are getting configured at run-time (e.g. by the NDK, etc.). I suppose the best way to look for this would be to look at the INTMUX registers and/or the interrupt vector table to see if it is being altered at run-time.

0 lijesh k over 14 years ago in reply to Brad Griffis

Intellectual 420 points

Thanks Brad Griffis.!

These interrupts are getting configured at run-time.

Lijesh

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A problem with hardware Interrupt. Only HWI7 to HWI 10 receives Interrupt.