using shared region

imad azhaf

Other Parts Discussed in Thread: TMS320C6678

Hi,

i use the TMS320C6678 and i like to make a program that send a message from core 0 to core 1 using shared region and semaphore hardware.
i have finished the first step conserning the synchronization of tow cores using semaphore hardware, but i can't send message ( I think that my problem can be solved by using Cache , any idea?). Can any one help me please?

---- my ".cmd" file :
MEMORY{
MSMCRAM o = 0x0C000000 l = 0x003FFFFF
L2RAM o = 0x10800000 l = 0x0007FFFF
}
SECTIONS
{
.flags : > MSMCSRAM
.L2mem : > L2SRAM
}

---- my ".c" file :
#pragma DATA_SECTION(message,".flags");
MESSAGE message;

#pragma DATA_SECTION(message_received,".L2mem");
MESSAGE* message_received;
after creating my message i use this line " message_received = &message; " to give access to core 1 to my message.

thanks.

over 13 years ago

0 imad azhaf over 13 years ago

Prodigy 130 points

i am waiting for your propositions.

0 Chad Courtney over 13 years ago in reply to imad azhaf

TI__Mastermind 30825 points

I'm a bit confused exactly what you're trying to do here?

If you simply want to use a shared memory location for passing data and the Semaphore to check who owns it, then yes this is possible.

Note that if you're using Cache (L1D Cache) which I suspect you would be, then you will need to perform Writeback Invalidates and maintain cache coherence manually between the cores. Please see the C66x DSP Cache User's Guide.

Best Regards,

Chad

0 imad azhaf over 13 years ago in reply to Chad Courtney

Prodigy 130 points

Thank you Chad for your help.

Processors

Processors forum

using shared region