CCS/TMS320F28035: No source available for "0x3ff599"

Nikit,

This is not an error. CCS is simply letting you know that "C" source is not available since this code section is in the Boot ROM. If you look at the Disassembly window you should find the assembly code. I hope this answers your question and if so, please click the green "Verified Answer" button. Thank you.

- Ken

So how do I solve it? Is there some routine I need to add or any other changes I need to perform to have the code available at that address at restart?

Ken,

Please elaborate on your answer. i don't understand what you mean.

Thanks,
Nikit Shah

Nikit,

Very simply the Boot ROM code was written in assembly language and not C. Therefore, CCS cannot display this as C, and that is why you are seeing a message 'No source available <at address>'. You will also notice that you are giving an option to click "View Disassembly". In the Disassembly window you will find the assembly code from the Boot ROM. So in summary, your C code is compiled to assembly and therefore you can view it as C 'source' and assembly in the Disassembly window. However, for code that is written in assembly, the assembly is the source.

Also, please note that there is a difference between "reset" and "restart". Reset will reset the device (to the Boot ROM), and Restart will restore the program counter (PC) to the entry point for the currently loaded program, typically at the beginning of the main function.

I hope this helps. Please let me know if you have any other questions. If this answers your question, please click the green "Verified Answer" button. Thanks.

- Ken

Thanks for clearing that. I see this message on reset and not restart. I don't get this message on restarts but when I reset, this message pops up and as it does not find any source code at that address, it fails to run.
What can be done to tackle this? I have tried a few things(mentioned on my initial post) but that was not enough. Any suggestions?

Thanks again for helping.

Nikit,
On a restart the program control goes to your application's entry point. On a reset the program counter is at the reset entry point which is in device boot ROM. If you hit RUN after a reset then device boot ROM is run and what happens and how the device boot ROM functions is explained in the device boot ROM guide. On a stand-alone run without emulator, when device powers up or after the device resets, the device boot ROM is run and then it will boot as per the boot mode pins configured.

You can do a reset and then restart to set the program counter to your application and run the application. You don't have to run the boot ROM necessarily every time unless you are trying to see if the application can be started after the boot ROM executed. Refer to the device boot ROM guide on what you need to do to make sure the boot ROM starts the application correctly. But I doubt that this is what you are trying to do.

Nevertheless if you want to see the ROM source code, the ROM source code for your device is available in controlSuite and C2000Ware. In ControlSuite you will find :- C:\ti\controlSUITE\libs\utilities\boot_rom\2803x\2803x_boot_rom_v1

In C2000Ware the ROM source code for your device is at C:\ti\c2000\C2000Ware_1_00_02_00\libraries\boot_rom\f2803x\v1_0\rom_sources

Now, after you load your application, you can use ADD symbols option and select the ROM COFF file from the release directory from above folder path. Now if you do a reset it should point to the reset entry point with ROM source code. Note that the ROM source is only provided for reference, you will not be able to build the ROM project and load the ROM.

Hope this helps

Best Regards
Santosh Athuru

Nikit,

Yes, you will see this message on reset and not restart.  From my previous post, reset will cause the PC to be at the device reset entry point, which is in the Boot ROM (i.e. written in assembly - and not C source).  Restart will cause the PC to be at the application code entry point (i.e. in your case written in C source).  Please note that what you are seeing is NOT an error or warning.  All is working correctly and as intended.

Now, the other issue you need to be aware of is setting the boot modes.  For this I suggest reviewing the workshop materials at:

http://processors.wiki.ti.com/index.php/C2000_Archived_Workshops#C2000_Piccolo_Multi-Day_Workshop_-_Revision_2.1_December_2010_.28ExpKit_F28035.3B_CCSv4.2.3B_DSP.2FBIOS_5.41.29

See the boot modes in module 4 and review the lab directions in module 5, specifically step 11.  Please let me know if this helps.

- Ken

Santosh,

That explanation was helpful. I did add symbols and on running my application SelectMode_Boot.c pops up and the PC is on line
asm(" ESTOP0")

void WaitBoot(void)
{
WatchDogEnable();
for(;;)
{
// If the emulator stops here
// a) change EMU_KEY to 0x55AA
// b) write the appropriate boot mode to EMU_BMODE
// c) perform a debugger reset, and run
asm(" ESTOP0");
}
}

I have the respective changes done on f28035.gel file.
What are your comments on this?Any suggestions?

-Nikit Shah