TMS320F28379D: Using TSET instruction on Global Shared RAM to implement a Spinlock

Eduardo da Silva Pino

Hi folks,

Is it possible to use C28x's TSET instruction on Global Shared RAM to implement a simple spinlock to create critical section between CPUs?

Happy Holidays,

over 4 years ago

0 Santosh Jha over 4 years ago

TI__Guru 50611 points

Ed,

The subject matter experts are out of office until end of the year. Expect response by end of first week of January. Sincere apology for inconvenience.

0 Eduardo da Silva Pino over 4 years ago in reply to Santosh Jha

Prodigy 61 points

No problem, maybe someone else within the community can answer, either way I can wait.

Thanks for the heads up.

Best Regards!

0 KARTHIKEYAN RAJAMANICKAM over 4 years ago in reply to Eduardo da Silva Pino

TI__Genius 11645 points

Hello Ed,

TSET operations are atomic from a CPU standpoint only, but not on the memory controller shared b/w two CPU's.

If you could explain your use case little more in detail, will see if we can offer you a solution.

+1 Eduardo da Silva Pino over 4 years ago in reply to KARTHIKEYAN RAJAMANICKAM

Prodigy 61 points

Nevermind, I just remembered that only one CPU can have write permission to a GSxRAM block, so it would be impossible for both CPUs to use TSET on the same memory location.

I am going to close this one! Thanks

Best Regards,

Ed.

C2000™︎ microcontrollers

C2000 microcontrollers forum

TMS320F28379D: Using TSET instruction on Global Shared RAM to implement a Spinlock