LP-CC2652RB: How to increase the stack size of TI-RTOS project's main.c?

Hello Qinchen Gu,

I hope you are well. 
To find the cmd file you first need to open the properties for project_zero, go into build, arm linker, and find the file search path, under that we will se the path with “/examples/rtos/LP_CC2652RB/ble5stack/project_zero/tirtos7/ticlang/”, paste that after where your sdk is located in files and we will find the cmd file (second image). As a test when STACK_SIZE (in .cmd file, open/edited with text editor) is set to 1024, we get 00000400 in .map, but when we double it to 2048 we get 00000800 as __STACK_SIZE.

You can configure the stack size for each task separately, find the code snippet below in the project_zero. 

For example, 

void ProjectZero_createTask(void)
{
    Task_Params taskParams;

    // Configure task
    Task_Params_init(&taskParams);
    taskParams.stack = appTaskStack;
    taskParams.stackSize = PZ_TASK_STACK_SIZE;
    taskParams.priority = PZ_TASK_PRIORITY;

    Task_construct(&pzTask, ProjectZero_taskFxn, &taskParams, NULL);
}

For more information on heap sizes (which could be the reason for your overflow) try looking into the ble_relase.cfg file found in "C:\ti\simplelink_cc13xx_cc26xx_sdk_7_10_01_23\source\ti\dmm\apps\common\tirtos" (or wherever you installed your sdk). Alternatively, the BLE user/migration guide gives some useful insight into the functions of the program (search for "heap"). 

If increasing the RTOS and application stack sizes does not resolve the issue, please consider monitoring your heap usage and adjusting accordingly, have a great day. 

Thanks,
Alex

Hi Alex,

Thanks for your detailed reply! I found the .cmd file and opened it, and found the following lines related to STACK_SIZE:

/*******************************************************************************
 * Stack
 */

/* Create global constant that points to top of stack */
/* CCS: Change stack size under Project Properties    */
__STACK_TOP = __stack + __STACK_SIZE;

And

--symbol_map __TI_STACK_SIZE=__STACK_SIZE
--symbol_map __TI_STACK_BASE=__stack

It doesn't seem to contain explicit definition of the __STACK_SIZE symbol. The comment in the first code snippet takes me back to the project properties -> ARM linker settings. However, no matter what value I set the "Set C system stack size (--stack_size, -stack)" (under Build -> Arm Linker -> Basic Options) to, I always get 0x400 for __STACK_SIZE in the generated map file. BTW, the value was initially blank, and I tried both 1024 and 2048, which doesn't seem to affect the build at all.

Regarding setting the app stack size, how do I verify the its stack size increased? I'm observing the Memory Allocation's SRAM section, and its value doesn't seem to change with the app stack size value.

Thanks!

Qinchen

Thanks, Alex! I'm finally able to change the stack size now.