HPI communication issue

sunny

Other Parts Discussed in Thread: OMAP5912

Hi,

Iam trying to use the HPI interface of the 5510 DSP (using DSK 5510 kit). The host side processor is omap 5910 and have interfaced the hpi with the emifs. I would like to check if the HPI can be interfaced with the emifs as we are finding difficulties in communicating with the 5510 through hpi. The simple test i did is to write to the hpic registers. I am trying to set the HPI_INT in the hpi so that it generates an interrupt on the dsp side and hence can atleast ensure that the HPI register writes are successful. However its failing to generate any interrupts (IFR0) and so am sure write to the HPIC register is failing.

So before i continue debugging further i would like to check if HPI can work with EMIFS instead of emif interface of omap 5912.

Thanks

over 14 years ago

0 Steve Tsang over 14 years ago

TI__Mastermind 23785 points

What is the application to do this interface conversion?

Regards.

0 sunny over 14 years ago in reply to Steve Tsang

Prodigy 40 points

Thanks for your response,

The application is for some kind of audio streaming. This is not for any kind of interface conversion , Its just that we want to use hpi as the interface to communicate between DSK and the omap5912.

0 Steve Tsang over 14 years ago in reply to sunny

TI__Mastermind 23785 points

You have to ensure traansactions meet both peripherals interface requirements. It would be easier for hpi to hpi or emif to emif.

Regards,

0 sunny over 14 years ago in reply to Steve Tsang

Prodigy 40 points

Does it mean that a hpi has to be always interfaced with a host processor which supports hpi or hpi cognizant . Please confirm.

0 Steve Tsang over 14 years ago in reply to sunny

TI__Mastermind 23785 points

Each interface: eg. USB, UART, HPI, EMIF etc has their own defined handshake protocol to secure a smooth data movement. Violation of the protocol handshake would end with incorrect data transfer.

To simply answer you question is yes.

Regards.

0 sunny over 14 years ago in reply to Steve Tsang

Prodigy 40 points

Hi Steve Tsang,

Thanks for your response, I think you may have to review and withdraw your statement. HPI is absolutely possible to interface with the emifs or any emif interface if you can suffice its timing requirements. I'm now able achieve HPI communication and transfer data to and fro between Omap5912 and the dsp 5510 through HPI-emifs.

So its definitely not an impossible task to interface a HPI with the non-HPI interface though it is not as straight forward as one expects but certainly is doable.

Just for your information.

Thanks

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HPI communication issue