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Programming nRF51822 via 6pin?

bolteon

Hello all,

So I've ran into an unfortunate situation, our firmware team decided to ditch us just as we're about to launch our product. I got a dump from them including just about everything we ever paid them to do, and have made my way through programming our PCB boards via an AVR ISP MkII and getting our iOS and Android apps to compile via the ionic framework.

The last thing I've left to do to get us back up and running as we look for replacements is programming the Raytec MDBT40 which houses the nRF51822. Along the lines of developement we had decided to use Adafruits firmware for the unit as it had extensions written that were favorable to what we wanted to do with the module.

Looking through the dump, this seems to be the instruction set to upload the firmware via the 6pin connector on our daughter board, and from what I gather- we need to upload it via a JLink (which we have) but need the 20pin to 6pin adapter (just the PCB part, not the cable since we already have a cable that we use for the AVR ISP MkII).

 .\JLink.exe -if SWD -device nRF51822 -speed auto
 
loadfile  <PATH>\Adafruit_BluefruitLE_Firmware-master\Adafruit_BluefruitLE_Firmware-master\softdevice\s110_nRF51822_7.1.0_softdevice.hex
loadfile  <PATH>\Adafruit_BluefruitLE_Firmware-master\Adafruit_BluefruitLE_Firmware-master\0.5.0\blefriend\blefriend_s110_xxaa_0_5_0_150224_blefriend_release.hex
r
g
for spifriend go to:
loadfile  <PATH>\Adafruit_BluefruitLE_Firmware-master\Adafruit_BluefruitLE_Firmware-master\softdevice\s110_nRF51_8.0.0_softdevice.hex
loadfile <PATH>\Adafruit_BluefruitLE_Firmware-master\Adafruit_BluefruitLE_Firmware-master\0.7.7\blespifriend\blespifriend_s110_xxac_0_7_7_161213_blespifriend.hex

Is there anything I'm missing? Does anyone know if I can buy just the PCB part without the cable? I know that seems silly but why have 2 cables?

Regardless, if there's anyway to do this update via OTA- a bit of help would be appreciated as I haven't found a way to do it via the Adafruit BLE app nor the Nordic BLE Connect app... every time I try to get the module into DFU- it disconnects.

Much appreciate any help and guidance, cheers.

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  • 0

    Update time...

    New JLINK showed up, same issues- so it has to be the board. Went digging with the multimeter and I’m guessing this is the issue:

    The MCU ISP is correct- and programs without issue. Pin 1 on the right hand column, 5 at the bottom and 6 next to it. 3.6V between these (1&5, 5&6).

    Now, it seems like something got really screwed up when rotating and routing the BLE ISP... 1&5 are in the other column, and their polarity is flipped.

    Green lines are continuity- not sure if those make a difference.

    Guess that explains the lack of functionality... I’m assuming here that regardless of programmer- the 6pin header pad is supposed to be wired the same (both AVR ISP MkII and JLINK).

    If so, is there any salvaging this connection setup? Does the polarity make a difference to the JLINK? What about alternative programming solutions (open to whatever is easiest)?

    Help! 

  • 0 in reply to bolteon

    The reads aren't off... this is the pinout for the AVR ISP MkII... which matches what's on the board for the pins to the MCU.

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