OMAP-L138 queries

Feroz,

Response below:

Is using Different frequency of operation for ARM & DSP possible?

[Sunil]: No, ARM and DSP run at the same frequency.

Linux on ARM9 and DSP NO OS ? How challenging will it be to run this software combo? Any advise

[Sunil]: This is possible - customer will have to come up with a system to handle inter-processor communication (DSPLink on ARM assumes SYSBIOS on DSP) and handle interrupts carefully.

How to debug on both ARM9 and DSP – simultaneously – run time on CCS v5? Any training/procedure for this?

[Sunil]: A debug session for the OMAPL138 will have bothe the ARM and DSP targets and provides the ability to set breakpoints, halt and run program code etc on both targets simultaneously

Internal RTC – How time accurate it is – in terms of ppm – say versus Maxim  DS3234  / TI BQ32000?

[Sunil]: RTC has a 16-bit compensation register with a range of +32766 to -32767 that takes effect every hour. I am not sure how to convert this to ppm.

Platform : CCS license quote for OMAP-L138 LogicPD EVM with Free CCS using XDS100v2

[Sunil]:Not sure of this question. But if a customer needs CCS licenses, can we direct them to estore?

Regards,

Sunil Kamath

Hi Sunil,

Sorry for the delay here. Was on travel/vsits... Please see my inputs/further queries

Is using Different frequency of operation for ARM & DSP possible?

[Sunil]: No, ARM and DSP run at the same frequency.

>> Why not? If I can change the formware clock settings, it should still work. Isn't it?

Linux on ARM9 and DSP NO OS ? How challenging will it be to run this software combo? Any advise

[Sunil]: This is possible - customer will have to come up with a system to handle inter-processor communication (DSPLink on ARM assumes SYSBIOS on DSP) and handle interrupts carefully.

Feroz>> Has any one tried this. I am discouraging the customer from going in this path, as most of our software is based on Linux/BIOS or NO-OS starterware on both DSP/ARM. Do you think its the right thing to do?

How to debug on both ARM9 and DSP – simultaneously – run time on CCS v5? Any training/procedure for this?

[Sunil]: A debug session for the OMAPL138 will have bothe the ARM and DSP targets and provides the ability to set breakpoints, halt and run program code etc on both targets simultaneously

Feroz >>OK

Internal RTC – How time accurate it is – in terms of ppm – say versus Maxim  DS3234  / TI BQ32000?

[Sunil]: RTC has a 16-bit compensation register with a range of +32766 to -32767 that takes effect every hour. I am not sure how to convert this to ppm.

Feroz>> Question is if there is an error and how often this pops up....ppm is failires per million ticks as I understand. OR lets day in a year how many ms/s of drift can be expected?

Platform : CCS license quote for OMAP-L138 LogicPD EVM with Free CCS using XDS100v2

[Sunil]:Not sure of this question. But if a customer needs CCS licenses, can we direct them to estore?

Feroz,

- DSP and ARM operating frequency

Sorry about the confusion, yes, the ARM and DSP can be run at different clock rates.

- No OS on DSP

This is not preferable from an ease-of-use standpoint as customer will have to write their own IPC communication system on the DSP. We are not aware of any customers doing it this way.

- RTC ppm

Let me get back to you on this one.

- CCS licenses

CCS has free limited licenses for XDS100 (http://processors.wiki.ti.com/index.php/Licensing_-_CCS)

Regards,

Sunil Kamath

Thanks Sunil!

I will await the RTC ppm/inputs.

Best Regards

Feroz