Recieve Error when Using vTaskSetApplicationTaskTag

[achechet (Alex)]

I am new user of FreeRTOS, so may be my question can stupid, sorry!
I have try to use vTaskSetApplicationTaskTag as a point to control when my task start/stop.

I do use

BaseType_t xReturned_ONE = xTaskCreate(vTaskCode_ONE, “ONE”, 504, NULL, tskIDLE_PRIORITY, NULL );*

to define task, and then in code of task set tag

		vTaskSetApplicationTaskTag( NULL, ( void * ) 1 );

but here I have recieve a warning

warning: #167-D: argument of type “void *” is incompatible with parameter of type “TaskHookFunction_t”

How to patch this or where I do mistake?

[aggarg (Gaurav Aggarwal)]

@achechet

I have try to use vTaskSetApplicationTaskTag as a point to control when my task start/stop.

Can you elaborate on how you plan to do that and what problem are you trying to solve?

@achechet

warning: #167-D: argument of type “void *” is incompatible with parameter of type “TaskHookFunction_t”

You can avoid that warning by casing the parameter to TaskHookFunction_t instead of void*:

vTaskSetApplicationTaskTag( NULL, ( TaskHookFunction_t ) 1 );

[achechet (Alex)]

@aggarg

Can you elaborate on how you plan to do that and what problem are you trying to solve?

I will mark the start and end of the task time by switching the level on the port. by watching on the logic analyzer i can control the time used by the task

[achechet (Alex)]

@aggarg

You can avoid that warning by casing the parameter to TaskHookFunction_t instead of void*:

vTaskSetApplicationTaskTag( NULL, ( TaskHookFunction_t ) 1 );

Yes! It is working. Thank you!

[achechet (Alex)]

Dear Aggard, it is compiled but not work as it neccesary…
Tag is not set in TCB, after
vTaskSetApplicationTaskTag( NULL, ( void * ) 3 );
pxTaskTag still set as zero

What is can be?

[hs2 (Hartmut Schaefer)]

I think you try to follow the FreeRTOS trace macros example. Ok.
You should check the return code of xTaskCreate. Maybe the calls failed ?
Also did you enable stack checking and properly defined configASSERT for development ?
I’d recommend to do so.

[aggarg (Gaurav Aggarwal)]

@achechet

I will mark the start and end of the task time by switching the level on the port. by watching on the logic analyzer i can control the time used by the task

As suggested by @hs2, you should explore trace macros.

@achechet

What is can be?

You are looking at an invalid address - see the location of xTCB is 0xA5A5A5A5. What is xTCB?

[achechet (Alex)]

I do looking TCB at 0xA5A5A5A5

but after vTaskSetApplicationTaskTag( NULL, ( TaskHookFunction_t ) 1 );
it is still zero

[aggarg (Gaurav Aggarwal)]

You are likely trying to observe a stack variable after the function has returned - which is not valid. Call the xTaskGetApplicationTaskTag and check the return value.