CCS/TIDM-1007: #pragma SET_DATA_SECTION("controlVariables")

Xiaoyu Lv

Part Number: TIDM-1007
Other Parts Discussed in Thread: SFRA

Tool/software: Code Composer Studio

#pragma SET_DATA_SECTION("controlVariables")
// RAMP to generate forced angle when grid is not present
RAMPGEN rgen1;
volatile float sineAngle;

GI_STRUCT gi;

GV_STRUCT gv;

What's the function of the code ''#pragma SET_DATA_SECTION("controlVariables")''?

#pragma SET_DATA_SECTION()

// datalogger
DLOG_4CH dLog1;
float dBuff1[100], dBuff2[100], dBuff3[100], dBuff4[100];
float dVal1, dVal2, dVal3, dVal4;

//--- SFRA Related Variables ---

What's the function of the code ''#pragma SET_DATA_SECTION()''?

over 3 years ago

0 Santosh Jha over 3 years ago

TI__Guru 50430 points

Hi Xiaoyu,

This is used to place variables in the gives section.

Please refer to the C2000 compiler documentation for more details.

www.ti.com/.../spru514t.pdf

0 Xiaoyu Lv over 3 years ago in reply to Santosh Jha

Prodigy 100 points

What's the means of "applying the CODE_SECTION to all symbols below it" ?

What's its use？

0 Santosh Jha over 3 years ago in reply to Xiaoyu Lv

TI__Guru 50430 points

Hi,

Please go through the documentation. It explains the uses in details in the example.

In your code,

#pragma SET_DATA_SECTION("controlVariables")

GI_STRUCT gi;

GV_STRUCT gv;

#pragma SET_DATA_SECTION()

The global variables gi and gv will be placed in the memory section "controlVariable".

This memory section must be defined in linker command file.

0 Xiaoyu Lv over 3 years ago in reply to Santosh Jha

Prodigy 100 points

Thanks a lot!

What's the advantage of this configuration?

How to define linker cmd file? Where?

TIDM1007 CMD file is shown below.

SECTIONS
{
codestart : > BEGIN, PAGE = 0, ALIGN(4)
.text : >>FLASH_BANK0_SEC1 | FLASH_BANK0_SEC2 | FLASH_BANK0_SEC3, PAGE = 0, ALIGN(4)
.cinit : > FLASH_BANK0_SEC1, PAGE = 0, ALIGN(4)
.pinit : > FLASH_BANK0_SEC1, PAGE = 0, ALIGN(4)
.switch : > FLASH_BANK0_SEC1, PAGE = 0, ALIGN(4)
.reset : > RESET, PAGE = 0, TYPE = DSECT /* not used, */

.stack : > RAMM1, PAGE = 1

.ebss : >> RAMGS3 PAGE = 1
.esysmem : > RAMGS2 PAGE = 1
.econst : > FLASH_BANK0_SEC4, PAGE = 0, ALIGN(4)

Thank you for your support very much!

0 Santosh Jha over 3 years ago in reply to Xiaoyu Lv

TI__Guru 50430 points

Hi,

Please take a look at the link here

http://software-dl.ti.com/ccs/esd/documents/sdto_cgt_Linker-Command-File-Primer.html

This allows to place the global variable at particular location if your application needs it.

In your Linker Command file, just add a line

controlVariables > RAMGSx PAGE = x

x -> depends on where you have space and which page it is.

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C2000 microcontrollers forum

CCS/TIDM-1007: #pragma SET_DATA_SECTION("controlVariables")