The use of "bss:remoteable" with #pragma

Nithin Ramesan

In the HyperLink example function available with the MCSDK, the structure variable dataBufferSrc is declared as follows:

#pragma DATA_SECTION (dataBufferSrc, ".bss:remoteable");
#pragma DATA_ALIGN (dataBufferSrc, hyplnk_EXAMPLE_LINE_SIZE);
hyplnkExampledataBufferSrc_t dataBufferSrc;

Exactly what is "bss:remoteable"? It doesn't seem to be defined in the .cfg file of the project either.

Thanks.

over 8 years ago

0 Ganapathi Dhandapani95 over 8 years ago

TI__Mastermind 28085 points

Hi,

Please see this wiki article for DATA_SECTION. In this example code used another family TI device, not C66xx. You can take this as a reference.
processors.wiki.ti.com/.../Placing_Variables_in_Specific_Memory_Location_-_MSP430

Take a look at the below similar thread:
e2e.ti.com/.../830125

Thanks,

0 Nithin Ramesan over 8 years ago in reply to Ganapathi Dhandapani95

Intellectual 270 points

Thank you for your reply. I looked at the linked thread and took a look at my platform configuration. From what I understand, .bss:remoteable is essentially stored in L2SRAM by default, and I have confirmed this for my system.

Now, whenever I run the program, the address of dataBufferSrc is always at 0x800000, the starting address of L2SRAM.

My question now is, will dataBufferSrc always be stored at the beginning of L2SRAM, or will it be allotted somewhere in between as well?

0 Ganapathi Dhandapani95 over 8 years ago in reply to Nithin Ramesan

TI__Mastermind 28085 points

L2SRAM is used for default TI example code, user can use L2SRAM, MSMC or DDR memory for dataBufferSrc.

Example:

#pragma DATA_SECTION (dataBuffer, ".bss:hyplnkData");
#pragma DATA_ALIGN (dataBuffer, hyplnk_EXAMPLE_LINE_SIZE);
hyplnkExampleDataBuffer_t dataBuffer;

Code for .cfg file:

/* Create data sections for specific memory locations */

Program.sectMap[".bss:hyplnkData"] = new Program.SectionSpec();

Program.sectMap[".bss:hyplnkData"].loadAddress=0x830000;    //change the load address based on L2SRAM, MSMC or DDR memory.

If this is placed in an L2 RAM there are no other dependencies. If this is placed in MSMC or DDR RAM, then the SMS or SES MPAX must be configured to allow the access.

Thanks,

0 Nithin Ramesan over 8 years ago in reply to Ganapathi Dhandapani95

Intellectual 270 points

Thank you!

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The use of "bss:remoteable" with #pragma