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nrf51822 not detected

guillermo

Hello I have a nrf51822 mbed kit PCA 10024 V1.0.0. When I connect the kit to the PC (Windows 7 64 bits) the Mkit enumerates as an MSD named MBED:

I updated the firmware to version 2018following the instructions stated in the following link: developer.mbed.org/.../

After putting the binary file in the MSD, it dissapears and the mbed LED flashes continously.

Then I tried to get started openning nRFgo studio but the mbed kit is not detected (no boards connected).

Can anybody help me ?

Many thanks Guillermo

  • 0

    Can it be that the J-link driver is not present on the Segger chip anymore? Try to reprogram the J-link driver with the following steps:

    • Download the J-link driver from the nrf51 product page.
    • Enter bootloader mode on the Segger chip by keeping IF BOOT presset at startup
    • Drag and drop the downloaded bin file, then do a power-cycle.

    The board should now be visible in nrfGo studio. This question on developer.mbed.org might also be relevant to you.

  • 0 in reply to MartinBL

    Hi Many thanks for your answer. I'm still trying to detect the nrf51822 mbed kit PCA 10024 V1.0.0.

    I don't have a nrf518922 DK, but a nrf51822 mbed kit, I'm trying to reprogram the

  • 0 in reply to MartinBL

    Can you please try this:

    • Unplug mkit from the usb.
    • Press and hold down the reset button and connect the usb while doing so
    • Mkit should now enumerate as an MSD named “BOOTLOADER”
    • Copy the binary file attached to the BOOTLOADER drive.
    • Wait until the drive dismounts and the mbed LED is flashing continuously
    • Unplug the board and plug in again, and the board should enumerate as usual.

    To erase an NRF chip on a bricked board (this will only work after the attached firmware update is done):

    • Connect the mkit via usb and make sure it enumerates as an MBED drive.
    • Press and hold down the reset button for ~5s
    • The mbed LED will start flashing while the reset button is pressed, and after 5 seconds the LED will flash at a faster rate to indicate the NRF chip erase.
    • Once the above step is complete the nrf chip should be fully erased and the board unblocked.
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