• State
  • Locked Locked
  • Replies 3 replies
  • Subscribers 52 subscribers
  • Views 494 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

CC2540 Enter UBL through software

Donnie Wittbrodt
Prodigy 90 points

Other Parts Discussed in Thread: CC2540

I'd like to be able to enter the UBL through a software command without the need for a button press on startup.  I've searched around and haven't found any info regarding this yet.  Is this something that is possible with a CC2540?

  • 0
    TI__Mastermind 34660 points

    It should be possible. You could use a flash bye or a non-initialized RAM byte to decide whether to enter the UBL on startup. You could then edit this byte and reset the device in your command.

  • 0 in reply to Tim C
    Prodigy 90 points

    Thanks for the response.  It looks like to do it that way I'll need to read a byte of memory in ublExec(void).  I'd like to be able to write a byte using osal_snv_write in my application (already working) and then simply read back that byte with HalFlashRead.  The only problem now is how do I convert the snv ID to a real memory address?

  • 0 in reply to Donnie Wittbrodt
    Prodigy 90 points
    Got it working finally. Ended up adding a version of osal_snv (minus all the write commands to save space) to a duplicate UBL project. From there I modified the ublExec and ublInit functions so that it inits osal_snv and reads the ID that I write to in my application. It also leaves the timer intact so if a user wants to exit the bootloader without loading a new bin, they simply need to wait the appropriate period of time and it will jump to the current application. Since I removed the writing from osal_snv for the bootloader, the application needs to reset the bootloader flag on launch or it would always launch to the bootloader after an initial set.