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Debugger DevPack prevents SensorTag from running?

Paul Abbott
Intellectual 270 points
Other Parts Discussed in Thread: CC2650

I purchased the Debugger DevPack in hopes that I could use it for both debugging and as a convenient way to prototype additional hardware connected to the SensorTag using the unpopulated pcb header included on the Debugger DevPack PCB.

I want the Sensortag to work when there is no USB connection to the Debuger DevPack.
It is working as a debugger, but unfortunately when I unplug the USB cable, the SensorTag does not run.

Is it held in reset or something?  Is there a way around this? (hardware modification?)

If not, is there a blank prototyping DevPack with just a breakout connection to IO pins and some proto-board space?

  • 0
    TI__Mastermind 34660 points
    This should work fine. Can you verify that the device is powered correctly?
  • 0 in reply to Tim C
    Intellectual 270 points

    The SensorTag is running fine when the Debugger DevPack is not attached. As soon as I attach it (without USB connected) it stops. No LEDs are lit and no bluetooth advertising.

    FYI: I bought 5 sets of these from Arrow. I have verified the same behavior on two.

    The sticker on DebuggerDevPack says Rev.:1.2.0 1520

    The sticker on SensorTag says BLE Rev.: 1.1.3 1516

  • 0 in reply to Paul Abbott
    Prodigy 70 points

    Hi Paul,
    I am having a sensorTag runing with the Debug devpack attached. (I did not touch the battery)
    - try the Debug DevPack reset button
    - try to detach it then re attach it
    - try to switch the SensorTag off and on - side buttons (stops and starts advertising) ?
    I flashed the SensorTag with usb, it was running still attached, I detached the USB, it was not running anymore as you describe, reset didn't seem to help, I removed the debug devPack, switch off and on the sensor, it was running, reattach the debug devpack, then, not sure if I had to push the reset switch of the debug -(small black point on yellow circle).

    ----------------------------------

    Edit : as mentioned in later post, this worked but not reproducible, I don't know what is influencing this.

    Hope this helps.
    Wassim

  • 0 in reply to Wassim Filali
    Intellectual 810 points
    Hi Wassim,

    I face similar problem, my case as below:
    1. SensorTag attach with devpack and usb, SensorTag is running.
    2. After detach devpack, SensorTag is not running.
    3. I tried to remove battery and put it back, still same.

    I notice you mentioned switch off and on the sensor. Can you elaborate what you means by that? Basically I want the SensorTag running with devpack attached.

    Thanks.
  • 0 in reply to tkCheng
    Prodigy 70 points
    Hi Paul,
    by switch off and on the sensor I referred to the side button. There are two side buttons, one as a simple switch sensor, the other one starts and stops advertising (with led blinking).
    But I admit, I repeated the same test I described for you earlier and it didn't work, so I conclude that the behavior is inconsistent.
    I retried at least 3 more times and none worked, so there must have been another random parameter (floating pin or something).
    If I was you, and if it is really important to keep it working with and without the USB debugger, I would look for the J4 FIDU3 connector, maybe pulling up some pins would solve this.
    Wassim
  • 0 in reply to tkCheng
    Intellectual 810 points
    Finally found the reason, the battery has actually drain out. Changing a new one fix it.
    Anyway thanks to Wassim, your descriptions had led to me to right way.
  • 0 in reply to tkCheng
    Prodigy 70 points
    Sorry Cheng, yes not Paul,
    in your case, it was the battery then.
    But for Paul, and his case of using the Tag without USB attached and with Debug devPack attached, the battery does not help, I tried with a new one.
    The only time when it worked, it was while moving the debug board, and both green and red led were blinking, it might have worked due to a bad connection while moving it.
    Wassim
  • 0 in reply to Wassim Filali
    Intellectual 270 points
    Looks like I'm out-of-luck. Thanks for confirming.

    Is there another devpack available which would allow me to prototype a circuit?

    For now, Im planning to use the CC2650EM-7ID board with the SOC-BB. Much more expensive, but I'm on a deadline. Can someone confirm if these two boards are compatible?
    www.digikey.com/.../296-28922-ND
    www.digikey.com/.../296-41984-ND
  • 0 in reply to Paul Abbott
    TI__Mastermind 18780 points

    The SOC-BB board is made for earlier CC radios, not the CC26xx. However it will give you access to several of the DIOs, but there will also be several DIO and other signals that will be GND that you do not want connected to GND. For instant the JTAG_TMS is conncected to GND, JTAG_TCK, TDI and TDO are not connected to anything on the SOC-BB so it is not a straight forward solution. How will you program your CC2650 on the EMK without a SmartRF06EB board?

    Back to your original set-up with the debugger devpack, why can you not connect it to the USB? It is not designed to be used without USB power, so if not connected to the USB, you need to make sure to set the CC2650 pins that are connected to the TIVA so that you do not power this from the IO pins.  

  • 0 in reply to CHS
    TI__Mastermind 18780 points
    This is the feedback I got from the SensorTag team, the info will be added to the Debugger DevPack wiki page.
    "It is not recommended to use the Debug DevPack without the USB power atteched due to the risk of powering the Debugger from the coin cell battery on the SensorTag. The SensorTag battery voltage will be disconnected from the Debug DevPack power supply but there is a risk that the I/O lines from the CC2650 will power the MCU on the debugger. The following I/O DevPack signals are connected to the MCU on the DevPack

    Pin number Name
    5 DP12/AUDIO_FS/TDO
    10 DP5/UART_TX
    12 DP4/UART_RX
    15 DP8/SCLK/TDI"
  • 0 in reply to CHS
    Intellectual 270 points
    I'm not sure where you got your pin #s. This is what I see on the SensorTag schematic r1.2.
    IOID_29 // Pin 42, DP5/UART_TX
    IOID_28 // Pin 41, DP4/UART_RX
    IOID_16 // Pin 26, DP12/AUDIO FS/TDO
    IOID_17 // Pin 27, DP8/SCLK/TDI

    These defines are in board.h for the sensortag project:
    #define Board_DP5_UARTTX IOID_29
    #define Board_DP4_UARTRX IOID_28
    #define Board_EB_UART_TX IOID_16
    #define Board_EB_UART_RX IOID_17

    Since I am running the SimpleBLEPeripheral project,
    I added the following lines to PIN_Config BoardGpioInitTable[] in C:\ti\tirtos_simplelink_2_13_01_09\packages\ti\boards\SRF06EB\CC2650EM_7ID
    IOID_16 | PIN_INPUT_EN | PIN_PULLDOWN, // added to prevent debugger DevPack from being powered
    IOID_17 | PIN_INPUT_EN | PIN_PULLDOWN, // added to prevent debugger DevPack from being powered
    IOID_28 | PIN_INPUT_EN | PIN_PULLDOWN, // added to prevent debugger DevPack from being powered
    IOID_29 | PIN_INPUT_EN | PIN_PULLDOWN, // added to prevent debugger DevPack from being powered

    But still no luck. The SensorTag stops working as soon as I remove the USB cable. The voltage on the DevPack connector pin "VDD" is 1.1V.
    I tried replacing the battery.

    I'll try making the same mods to the SensorTag project and see if that works.

    BTW, Now this file is not in version control. What is the recommended way to add it to my version control- it is outside of my source tree.
  • 0 in reply to CHS
    Intellectual 270 points
    So my solution for now is to remove all of the components (except the connectors) from the Debugger DevPack so I can use it as a development board.

    In doing so, I have discovered that there seems to be a mistake in the pinout of the P2 "Test points" header. The DP4 and DP5 seem to be swapped.
    I verified the pinout of J2 on the SensorTag board, and it seems to be correct.

    But on the debugger DevPack PCB, I ohmed from J1 pin 11(XDSET_RXD) to P2 pin 11 ("DP4" on the silkscreen) and get no continuity. Same with pin 9 (XDSET_TXD and DP5).

    I get continuity from pin 11 on J1 to pin 9 on P2 and from pin 9 on J1 to pin 11 on P2.