RE: MBR lost ?

Vidar Berg — Wed, 24 Jul 2019 09:36:48 GMT

Thanks for update, glad to hear that you found a solution.

Best regards,

Vidar

RE: MBR lost ?

Fredcoach — Wed, 24 Jul 2019 09:31:33 GMT

Hi again Vidar, I just replaced the whole nRF5_SDK_15.3.0_59ac345 contents by the original one, built, dowloaded and it works!

Problem solved.

Thanks for your help,

Frederic

RE: MBR lost ?

Fredcoach — Wed, 24 Jul 2019 08:26:52 GMT

Hi Vidar, no, it is not exactly the same, as one is built for PCA10056 and the other one for PCA10059. I am getting the UART output through the USB but get the same thing when I connect a FTDI converter to the serial pins. I probably mistakenly modified a file which is used for PCA10056 build only but I don't know which one yet. Still have to dig deeper.And this would also explain why the pre-compiled image works but not the locally built one.

Best regards,

Frederic

RE: MBR lost ?

Vidar Berg — Wed, 24 Jul 2019 07:09:26 GMT

Hi Frederic,

Are you running the exact same FW on the dongle, and how are you getting the UART output from the dongle, is it with a separate UART bridge? I'm not sure why the data gets corrupted when you use the DK but I don't see how it could be related to flash programming, I think it must be something else.

RE: MBR lost ?

Fredcoach — Tue, 23 Jul 2019 15:06:53 GMT

Hello Vidar,

I just tried, first by compiling it. It did not send any message to the USB connection.

Then I flashed the precompiled version and got these messages on USB:

<info> app: Heart Rate collector example started.

<info> app: Starting scan.

It looks correct.

Then I reflashed my application and I got this on the USB (it looks really wrong…)

UATiiilzd
sn AT
sn AT
sn AT
sn AT
sn AT
sn AT
sn AT
sn AT
sn AT
sn AT
eoeyto tre!
sn AT
sn AT
sn AT
sn AT
rtn osn AT

o itnn.UigUREUigUREUigUREUigURssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssss

I downloaded my program onto several dongles, they work fine.

As I did not tell you before, it is on a nRF52840-DK that I have this problem.

Do you have any idea?

Best regards,

Frederic

RE: MBR lost ?

Vidar Berg — Fri, 19 Jul 2019 12:55:18 GMT

Hello,

The MBR section is included in the Softdevice image, so be sufficient to just re-program the app+softdevice after you've programmed an app that starts at address 0. Have you tried to program any of the other BLE examples to see if those work. One of the pre-compiled ones for instance:

nrfjprog --program

devzone.nordicsemi.com/.../ble_5F00_app_5F00_hrs_5F00_pca10056_5F00_s140.hex --chiperase --reset

Best regards,

Vidar