AM3358: PRU identification

Damon Kelly10

Prodigy 200 points

Part Number: AM3358

Is it possible for code in the AM335x PRU to identify which particular PRU (PRU0 or PRU1) it is running in?

over 8 years ago

0 Biser Gatchev-XID over 8 years ago

TI__Guru**** 393215 points

I have notified the PRU experts. They will respond here.

0 melissaw over 8 years ago in reply to Biser Gatchev-XID

TI__Genius 15960 points

Hi Damon,

There is no PRU hardware feature to enable this. However, there is a software trick that is commonly used.

Before running the firmware, you can have the ARM write a '0' into PRU DRAM0 and '1' into the same address in PRU DRAM1. The firmware can then read this address (using the PRU local data memory map or constant table) to identify whether it's running on PRU0 or PRU1.

Regards,

Melissa

0 Damon Kelly10 over 8 years ago in reply to melissaw

Prodigy 200 points

Thank you Melissa,

That is a good work-around.

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AM3358: PRU identification