Flash program nRF52840 DK

[cdugue]

I have trouble programming the PDK using nrfjprog. I can flash the program fine using Segger Embedded Studio but it doesn't appear to be working using nrfjprog.

Here are the steps I followed:

1. Flash s140 softdevice using make flash_softdevice in the appropriate directory (worked fine)

2. Erase the user memory nrfjprog --family nrf52 -e

3. Program the chip with application.hex nrfjprog --family nrf52 --program application.hex

4. Reset the chip nrfjprog --family nrf52 -r

Following those steps, I don't get any error but the program doesn't appear to be working. I don't get any messages coming out of the J-Link debugger.

Note: I don't think the hex is the problem as I tried to flash both the hex file generated by gcc and the one obtained from Segger Embedded Studio. Also, I am building on mac.

[Sigurd]

Hi,

The command nrfjprog --family nrf52 -e will erase all user available program flash memory and the UICR page. So in step 2 you are erasing the S140 SoftDevice. Try to switch the order between step 1 and step 2.

[cdugue]

Hi Sigurd,

Thanks for your answer. I switched the order of steps, but I still can't run my program.

[Sigurd]

What SDK version are you using ? What example are you testing?

[cdugue]

I am using nrf5_SDK_for_Mesh_v0.10.0-Alpha_src. I am testing the light switch example: client/server.

[Sigurd]

In what directory did you use the "make flash_softdevice" command ?

Note that the Mesh 0.10.0-Alpha SDK uses S140 5.0.0-3.alpha, but the regular SDK uses the S140 5.0.0-2.alpha version. Make sure that you are using the correct SoftDevice version.