LAUNCHXL-F28069M: Configuration to run a programm standalone (Programming done with Simulink).

Emmanuel,
For the "standalone" option there should be an option in Simulink to compile to run from flash vs RAM. This will program the flash with your code; and with the correct boot mode settings(boot from flash) will power up and run as you want. For a project in code composer there are build options for this; I assume there is something similar in Simulink but if someone who is more familiar with the tool properties could chime in I would appreciate it.

Assuming this is a static or saved setting, this should solve your second problem as well; i.e. on every new build it will load it to flash and then that will be the default to run from power up.

Best,
Matthew

In simulink configuration, you have an option "Boot from Flash". Simply tick that option.

You can check this video:

Regards,

Gautam

Hello Gautam,

thanks for the help. I've been using the simulink configuration with 'Boot from flash' option turned on as seen on the attached image, but it doesn't behave as i expect it to. While having the boot selection  switches in the up position, if i reboot the board it doesn't run the code just until i plug the USB cable. I want the code to run directly from startup. Is my configuration wrong or something?

Regards,

Emmanuel

Hello Matthew,

thanks for the quick response. It is good to know that it's possible, could you please tell me how this configuration is done? Maybe i can add custom code to the simulink generated code and this could solve my problem as well. If you look at my reply to Gautam, i am actually using this 'boot from flash' configuration, but after reboot i have to plug in the USB cable for the program to start running and i want to avoid that as well.

Regards,
Emmanuel

Emmanuel Santiago Iglesias said:

if i reboot the board it doesn't run the code just until i plug the USB cable.

You mean to run the code in standalone mode you need to plug-out and plug-in the USB cable?

After uploading the code i unplug the usb cable, turn off and then on the board. The board just holds the code until i plug the USB cable again and that is when the code starts running. I want the code to run as soon as i power up the board.

Hi Emmanuel,

The boot from flash check box is the way to get the code to run stand alone (on board power up).

https://www.mathworks.com/help/supportpkg/texasinstrumentsc2000/ref/sect-hw-imp-pane-c28x-build-options.html

Normally if you power down the board, unplug USB, and power on the board, the code will run after board boots. I don't know what happens if you reconnect USB after boot.

Cheers,

-Brian

Hello Brian,

i think the issue is something with the boot mode configuration. From the technical reference manual (SPRUFN6A) i noticed that the device does a check on some memory locations to determine boot mode (EMU_KEY and EMU_BMODE) before beginning the execution of the program. It also says that if some of the locations are invalid, then the 'wait boot mode' is used (see attached image), where the CPU keeps looping within the boot ROM until the emulator is connected. I assume the code is hanging there in this wait mode until i connect the USB. That's the check i want to overcome as i am using external power for the board. I've already tested with 5 different boards and all of them have the same behavior, so there has to be something wrong with my configuration. Any ideas on what i can do? Maybe my linker file is corrupted or something? Can i manually change the values of EMU_KEY andEMU_BMODE?

Regards, 

Emmanuel

Hi Emmanuel,

I've never had a problem with running stand alone, but I may not have tried the same setup you have.

Please contact MathWorks Technical Support and start a ticket, they can help answer this question or escalate to the development team for additional review.

Cheers,

-Brian