[OMAP-L137] DSPLINK and EDMA

Richard Bagdazian

Other Parts Discussed in Thread: OMAP-L137

I have a question regarding the use of edma in conjunction with DSPLINK on an OMAP-L137 evm board.

Does dsplink already include edma driver support? I am asking because I am attempting to integrate the edma driver (per: edma3_lld_01_07_00_01) into an application that runs successfuly until I make a call to edma3init() in my startup code. By including that call in my initial start up task, the application dies at various random times, usually with a failure indicated in response to a dsplink related operation. I am wondering if by calling edma3init in my startup task, I am screwing up internal state of dsplink which may already be using the edma hardware. ALso is calling edma3init at task level ok, or does it need to be in main before starting the DSP/Bios scheduler?

thanks

Richard Bagdazian

over 15 years ago

0 Deepali Uppal over 15 years ago

TI__Expert 4930 points

Richard,

I am not aware of the edma3init calling convention.

I will answer the DSPLink related questions. DSPLink does not use EDMA or provide any EDMA support on the OMAP-L137 platform.

Deepali

0 Anuj Aggarwal over 15 years ago

TI__Expert 3990 points

Richard,

As Deepali mentioned, DSPLink doesn't include EDMA3 driver and it doesn't use EDMA3 hardware too. So there should be no clash between these two.

Can you please explain what exactly you tried to do when you integrated EDMA3 driver? Moreover, would it be possible for you to use the latest EDMA3 driver 01.11.00.03 which can be downloaded from: http://software-dl.ti.com/dsps/dsps_public_sw/sdo_sb/targetcontent/edma3_lld/edma3-lld-bios5/01_11_00_03/index_FDS.html

Also, can you check where did your application crash? Can you put some printf's and take a log for the same?

edma3init() can be called from task context and there is no hard requirement for it to be in main() before starting the DSP/BIOS scheduler.

0 Brad Griffis over 15 years ago in reply to Anuj Aggarwal

TI__Guru*** 125430 points

Does edma3init() dynamically plug any interrupts? Perhaps it is trashing an interrupt already setup in your tcf file or by dsplink.

0 Richard Bagdazian over 15 years ago in reply to Brad Griffis

Intellectual 630 points

Thanks for your helpful responses. I was able to resolve the problem after backtracking and carefully reviewing my changes. I had inadvertently changed part of my tcf file and it was causing memory layout problems. Since fixing it, I've been able to integrate a DSPLINK based application and the sample Audio passthrough application as my input source. Currently I'm optimizing my algorithm to get it up to real time speed.

Thanks again,

Richard Bagdazian

0 William Kelleher over 15 years ago in reply to Richard Bagdazian

Prodigy 10 points

Hi Richard,

I've encountered a similar problem while trying to integrate the helloDSP sample with the audio passthrough sample. Can you be more specific as to how you resolved this?

Thank you,

Will

0 Jone Joniee over 10 years ago in reply to Richard Bagdazian

Intellectual 470 points

Dear Rechard,

I would be very very thankful if you answer the following questions:
1. Where do you call the EDMA3init()?
2. How do you change the tcf file? it is possible send your tcf file to me?

best regards,

Processors

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[OMAP-L137] DSPLINK and EDMA