How to put DSP on hold in running ARM apps

Duy-Ky Nguyen88210

Other Parts Discussed in Thread: OMAP-L138

Hello,

I have DSP to collect data from FPGA via UPP bus then store into SATA HDD in normal mode.

In debug mode without SATA HDD, I use ARM to collect data, but it appears I'm loosing a lot of data, probably the missing data were collected by DSP as UPP is shared resource for both ARM & DSP ?!?!

My question is

HOW to put DSP on hold so I can run ARM code without DSP interference ?

Thanks,

~Duy-Ky

over 12 years ago

0 Renjith Thomas over 12 years ago

Guru 31670 points

Which is the SoC that you are using?

0 Duy-Ky Nguyen88210 over 12 years ago in reply to Renjith Thomas

Expert 2250 points

Ooops, so sorry, I forgot to mention the chip OMAP-L138

Thanks,

~Duy-Ky

0 Renjith Thomas over 12 years ago in reply to Duy-Ky Nguyen88210

Guru 31670 points

Duy-ky,

Are you running any code on DSP that is accessing uPP? I assume that you've interfaced only one FPGA device to the uPP bus. If so, why are you suspecting DSP to be reading from the uPP?

You can disable DSP by disabling power or clock to the module.

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How to put DSP on hold in running ARM apps