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Image download from external processor

Yohannes Tesfai
Prodigy 170 points

Other Parts Discussed in Thread: CC2541

Hi,

I have an architecture with CC2541 as a slave connected to an external processor. I am running the full BT stack on CC2541 (not using HCI API), and running application on the external processor. I have JTAG connection to the external processor for factory image download, but don't have JTAG connection to the BT chip. My question is, what image is loaded in the BT chip before I get it? Is the image enough for me to be able to load my image from the external processor through a serial interface? If yes, is there example source code I can look at to start my development?

Thanks
Yohannes

  • 0
    TI__Guru** 105180 points
    Hi Yohannes,

    There is no pre-programmed image on the CC254x. If you search this forum for "factory programming" you can find factory programming options, such as gang flashing the chips prior to SMT. One method may be to gang flash an image containing a Serial Bootloader (SBL) then use your host MCU to update the image. Details on the SBL can be found on the BLE Wiki: processors.wiki.ti.com/.../SerialBootLoader

    Best wishes
  • 0 in reply to JXS
    Prodigy 170 points
    Hi JXS,

    Thanks for the info on this. I have a follow on question that occurred to me from your answer though. You mentioned programming the chips prior to SMT, is this something that we would do in the factory or is this something that we need TI/distributor to do? If it's something that we can do in our factory, can you please point me to information on it?

    Thanks
    Yohannes
  • 0 in reply to Yohannes Tesfai
    TI__Guru** 105180 points
    Hi Yohannes,

    For factory pre-programming, there are various posts on using a gang flash programmer to program the image. As to when/where this is done, it's up to you or your manufacturing facility. I'm not sure what services are offered by the distributor, but you can inquire to see if they offer pre-programming your image as an option.

    Best wishes