DFU example not working

RE: DFU example not working

Moritz — Wed, 22 May 2019 10:17:49 GMT

Ran into the same problem and managed to resolve it quickly thanks to this answer. Shouldn't the makefiles for the dfu examples be adjusted accordingly?

RE: DFU example not working

Simon — Fri, 03 May 2019 12:14:35 GMT

As mentioned here and here, nRFgo Studio is outdated and we are not working on the app anymore. Does it work to program the bootloader with nRF Connect for desktop and the programmer app?

Best regards,

Simon

RE: DFU example not working

Keith Wakeham — Sat, 27 Apr 2019 19:15:25 GMT

Is nrfgo going to be updated to fix this problem because right now the "program bootloader" tab just got useless.

RE: DFU example not working

jonas.woerner — Mon, 08 Apr 2019 13:11:14 GMT

I was using S140 5.0.2alpha, but I have updated my main app to use S140 V6.0 and used the bootloader from SDK 15.0, now everything works as expected! :)

RE: DFU example not working

Simon — Mon, 08 Apr 2019 13:08:44 GMT

[quote user="jonas.woerner"]but my application uses the alpha version of the SD140, and the bootloader uses the normal SD140.[/quote]

Could you specify exactly what SoftDevice you are using for respectively the bootloader and the application. When changing the SoftDevice for an application you may have to do some API related changes to your code. The migration guides can be found along with the SoftDevice after downloading it.

Best regards,

Simon

RE: DFU example not working

jonas.woerner — Wed, 03 Apr 2019 10:20:29 GMT

ok,

I have different revisions of the nrf52840, but even the old one seems to work with the new softdevice, is that expected?

I will try to use SD16.1.1 ifor future, but Im still intereset in how I can build the examples for another SD...

I tried changing the FLASH origin in th elinker settings to the flash start of the corresponding softdevice, but that didnt do the trick..?

RE: DFU example not working

Simon — Mon, 01 Apr 2019 12:53:42 GMT

What revision of nRF52840 are you using? What SDK are you using, and what softDevice version are you using? Check the Compatibility matrix on what to go for. If you have the newest nRF52840 I would recommend you to use SDK 15.3.0 and SoftDevice S140 v6.1.1 for both the bootloader and the application.

Check out this tutorial regarding adjustments of RAM

Best regards,

Simon

RE: DFU example not working

jonas.woerner — Fri, 29 Mar 2019 11:57:51 GMT

wow, thats a really good answer, thanks!

I still have some questions left though ;)

in order to use the bootloader with my application, both have to be compiled for the same softdevice, but my application uses the alpha version of the SD140, and the bootloader uses the normal SD140.

also, I tweaked my RAM addresses of my application to give the softdevice more ram.

How can I compile the DFU bootloader with the other Softdevice and also give it more ram?

RE: DFU example not working

Simon — Tue, 26 Mar 2019 08:34:14 GMT

In SDK 15.3 the bootloader start address is stored in the MBR section instead of the UICR (since UICR cannot be protected by ACL/BPROT), and that causes problem in the makefile, where the nrfjprog command sectorerase is used, let me explain.

If you take a look at the makefile of the BLE DFU bootloader examples, you can see that the bootloader is flashed first, and the bootloader start address is stored in the MBR section. Then the Softdevice is flashed onto the chip using nrfjprog and the sectorerase command. The problem here is that sectorerase command will erase the bootloader start address before flashing the MBR.

Some solutions are:

Merge the Softdevice and the bootloader
Flash it in the following manner
- nrfjprog -f nrf52 --program s140_nrf52_6.1.0_softdevice.hex --chiperase
- nrfjprog -f nrf52 --program nrf52840_xxaa_s140.hex -r

Best regards,

Simon

RE: DFU example not working

jonas.woerner — Mon, 25 Mar 2019 12:54:55 GMT

Update: when I use mergehex to merge softdevice and bootloader and application, it works, but if I program it after another it doesnt...?!

Update2: when I compile and merge the debug bootloader, it works, but not with the non-debug version. also the non debug version is significantly smaller when compiled.