LAUNCHXL-F28379D: Using Startup.firstFxns

Rashmitha Ramesh Nair

Hi,

I am trying to define some startup functions

I understand from the user guide example that I need to add below lines in .cfg file

var Startup = xdc.useModule('xdc.runtime.Startup');
Startup.firstFxns[Startup.firstFxns.length++] = '&myFirst';

and I have defined myFirst() function in my application

When I execute the code, it throws an error from Startup_exec() 



and is unable to proceed beyond the below part

 for (i = 0; i < Startup_firstFxns.length; i++) {
 /* REQ_TAG(SYSBIOS-955) */
 Startup_firstFxns.elem[i]();
 }

Question:
Is there anything else that needs to be defined to use Startup functions?

Regards,
Rashmitha

over 4 years ago

0 Whitney Dewey over 4 years ago

TI__Guru 54615 points

That "No source available" message isn't necessarily an error. _system_post_cinit() is probably written in assembly and that's why CCS says it can't find the source--there just isn't any C code for CCS to display. When you get to that point, you can probably open the disassembly window and assembly single step through it. Why is it stopping there? Does it seem to be stuck in a loop or hitting an ESTOP0 instruction?

When you say it can't proceed beyond that point, do you mean it gets stuck in that loop or just that you jump to some unfamiliar code when it calls Startup_firstFxns.elem[i]()?

Whitney

0 Rashmitha Ramesh Nair over 4 years ago in reply to Whitney Dewey

Intellectual 455 points

Hi Whitney,

Startup_firstFxns.elem[i](); calls a function in HeapMem.c

1. Void HeapMem_init()and from there into app_p28FP.c

2. It then enters Void HeapMem_restore(HeapMem_Object *obj)

The control then comes back to Startup_exec()

In the second iteration, Startup_firstFxns.elem[i](); calls xdc_Void ti_catalog_c2800_initF2837x_Boot_initStartup(xdc_Void) in app_p28FP.c

control then goes to void Boot_initFlash() in Boot.c

then goes to Queue.c then to System.c. The error is encountered in System_doPrint() in System.c. (It says "Break at address "0x6fd6" with no debug information available, or outside of program code.") further stepping leads to ILLEGAL_ISR()

Please see attached screenshot

Regards,

Rashmitha

0 Whitney Dewey over 4 years ago in reply to Rashmitha Ramesh Nair

TI__Guru 54615 points

Have you seen this thread? Can you follow some of the debug tips there? https://e2e.ti.com/support/processors-group/processors/f/processors-forum/953161/faq-can-you-explain-the-boot-sequence-for-ti-rtos-sys-bios-based-application/3521880#3521880

I also see it uses the "$add" to plug the a first function. Have you tried writing your cfg file that way instead?

Whitney

C2000™︎ microcontrollers

C2000 microcontrollers forum

LAUNCHXL-F28379D: Using Startup.firstFxns