DFU example doesn't work. need explain step by step

RE: DFU example doesn't work. need explain step by step

Mikhail — Fri, 01 Dec 2017 07:25:40 GMT

Thanks for Your help.

RE: DFU example doesn't work. need explain step by step

Hung Bui — Fri, 01 Dec 2017 07:18:18 GMT

@Mikhail: Please create a new case, this case is pretty long now. If you see something doesn't work you need to explore the code and figure out why. I can't explain everything for you step by step. If you want to switch from application to bootloader, please try to test with the buttonless example included in the SDK and use exactly the same what we do there.

RE: DFU example doesn't work. need explain step by step

Mikhail — Thu, 30 Nov 2017 15:18:15 GMT

sorry, now works. But after setting 0xB1 and reboot, no DFUTarg advertising.

RE: DFU example doesn't work. need explain step by step

Mikhail — Thu, 30 Nov 2017 11:43:57 GMT

Hi again! Sorry. But I can't write from my app

    err_code = sd_power_gpregret_clr(0, 0xffffffff);
VERIFY_SUCCESS(err_code);

err_code = sd_power_gpregret_set(0, BOOTLOADER_DFU_START);
VERIFY_SUCCESS(err_code);

when try to read in the bootloader:

  if(NRF_POWER->GPREGRET == BOOTLOADER_DFU_START)

result- not writed. ?

RE: DFU example doesn't work. need explain step by step

Mikhail — Wed, 29 Nov 2017 13:47:11 GMT

Yes, all work fine. Should read appendix 1) Thanks for help!

RE: DFU example doesn't work. need explain step by step

Mikhail — Wed, 29 Nov 2017 11:23:28 GMT

I folowed all steps. And bootloader work good. I mean: when flash SD and bootloader, I can see advertise DFUTarg. I can connect and uppload firmware .zip prepared before. Once again- it works good. Now I learn appendix 1.

RE: DFU example doesn't work. need explain step by step

Hung Bui — Tue, 28 Nov 2017 16:41:13 GMT

Before you test something like that, please make sure bootloader works, do what i described in the guide, all the step. And let me know if it works. I can't follow you if I don't know what you have tested and what you have not. Also please check appendix 1, you need to create the bootloader setting hex to be able to flash with Jlink.

RE: DFU example doesn't work. need explain step by step

Mikhail — Tue, 28 Nov 2017 13:19:48 GMT

Now I try do next steps: - flash SD, flash Bootloader, flash .hex app- all via J-link. Correct? After that I don't have work my app, but I see DFUTarg in the Air. Is it normal? I nothink changed in .hex app. What I did wrong? Thanks for help.

RE: DFU example doesn't work. need explain step by step

Hung Bui — Tue, 28 Nov 2017 13:13:31 GMT

Hi Mikhail,

Sorry I didn't see your last comment. Yes you can flash your app using Jlink and then use DFU OTA later. You have 2 option to enter DFU , via holding a button when the board reset or enter it via BLE command (buttonless example). Please have a look at appendix 2 in my blog.

After you enter DFU bootloader with a button, you should do DFU OTA, not flashing via Jlink.

RE: DFU example doesn't work. need explain step by step

Mikhail — Tue, 28 Nov 2017 13:04:12 GMT

Hung, final question- how to make DFU with button and with first flashed .hex. I mean, I flash .hex as usual. After that If I press button and reboot, I will can flash via DFUTarg. How to do it?

RE: DFU example doesn't work. need explain step by step

Mikhail — Thu, 23 Nov 2017 15:10:40 GMT

Ok. I need first type of bootloader with keys. But I want to do one thing- I want to flash my app via programmer (J-link) after I want to have a possibility upgrade via DFU. Which settings should set in my app?

RE: DFU example doesn't work. need explain step by step

Hung Bui — Thu, 23 Nov 2017 13:35:56 GMT

Hi Mikhail,

The buttonless project is simply a showcase how you enter the bootloader by a command via BLE instead of press a button and trigger a reset. Basically what it does is to wait for the command on a characteristic (DFU service) and when there is a write command it will write to bootloader setting in flash a flag and then trigger a reset. After that the bootloader when booting up will check the flag and enter DFU mode.

You need to include ble_dfu.c into your project and implement that dfu service in your application. You need to init it and also add the ble_dfu_on_ble_evt() into ble_evt_dispatch() as normal service.

There is nothing about keys here so you don't need public_key.c

Note that you need both the bootloader and the buttonless dfu, they are not the same.

RE: DFU example doesn't work. need explain step by step

Mikhail — Thu, 23 Nov 2017 12:35:16 GMT

Also, I can't find in the experimental_ble_app_buttonless_dfu where should I change public_key.c to my file?

RE: DFU example doesn't work. need explain step by step

Mikhail — Thu, 23 Nov 2017 11:50:41 GMT

I try to buttonless DFU. I have one question- is the necessary spetial prepare my app? Or this DFU characteristic included in the DFU buttonless bootloader? And I can use my previous prepared app?

RE: DFU example doesn't work. need explain step by step

Mikhail — Thu, 23 Nov 2017 09:22:09 GMT

Yes. after change clock_lf_cfg now work. Thanks. I just forget that I can find by search. I try to boot via this bootloader.

RE: DFU example doesn't work. need explain step by step

Hung Bui — Thu, 23 Nov 2017 08:54:26 GMT

The clock source is selected in ble_stack_init() in nrf_ble_dfu.c

Note that you can always do a full search (find in files) using Ctrl+Shift+F, using that you can find for example clock_lf_cfg in all files and can quickly find where the clock is defined.

RE: DFU example doesn't work. need explain step by step

Mikhail — Thu, 23 Nov 2017 08:17:30 GMT

52832QFAA suppose 512

RE: DFU example doesn't work. need explain step by step

Mikhail — Wed, 22 Nov 2017 19:52:54 GMT

About chip, I'll give answer tomorrow. I ask regarding RC because I can't find a place in the boot project where I can change it settings (from qristall to RC). In the SDK i find and changed it. I think, I well good know SDK. But I also can't find place in the boot where set DFUTarg for ex.

RE: DFU example doesn't work. need explain step by step

Hung Bui — Wed, 22 Nov 2017 16:59:21 GMT

Yes, if you don't have crystal, you use RC for the bootloader. I'm not sure why you have to ask, you already mentioned about that above ??

If you see issue, you debug it. That's why I ask how familiar you are with the SDK. The bootloader is not a black box, you can debug and find the reason why it doesn't advertise. It's no different from a normal application.

You have 149 errors could be because the size of the bootloader is bigger than the size allocated for it, you need to increase the size of the bootloader in the project setting. You need to move the bootloader down a little bit to make enough room for it.

Which chip is on your custom board ? we have 2 variant, one with 256kB and one with 512kB flash.

RE: DFU example doesn't work. need explain step by step

Mikhail — Wed, 22 Nov 2017 13:09:56 GMT

When set optimization 0- 149 errors. When return to 3- 0 errors. ?? Answer for my previous question.

RE: DFU example doesn't work. need explain step by step

Mikhail — Wed, 22 Nov 2017 10:04:45 GMT

Terefore, you mean that with flash only SD and boot, should be advertise DFUTarg? What about my custom board- there is no cristall- I use RC.

RE: DFU example doesn't work. need explain step by step

Mikhail — Tue, 21 Nov 2017 15:30:47 GMT

I'll try and write.

RE: DFU example doesn't work. need explain step by step

Hung Bui — Tue, 21 Nov 2017 13:47:20 GMT

Maybe you should turn on Logging and check what is in the log. You can switch the log on in the SDK_config.h.

Also you can add breakpoint inside the bootloader to check what goes wrong. You may need to set optimization level to 0 to debug.

RE: DFU example doesn't work. need explain step by step

Mikhail — Tue, 21 Nov 2017 13:33:27 GMT

Hi! I don't have any advertise. I folow all steps till D1. I flashed only SD and bootloader. No advertise. I have nrf connect app. Additional- I use custom board. This board doesn't have cristall. We use RC. I mean

ble_stack_init()

	nrf_clock_lf_cfg_t clock_lf_cfg = {	.source        = NRF_CLOCK_LF_SRC_RC,
																			.rc_ctiv       = 16,
																			.rc_temp_ctiv  = 2,
																		};

RE: DFU example doesn't work. need explain step by step

Hung Bui — Tue, 21 Nov 2017 10:05:36 GMT

If you don't have any application flashed, the bootloader will detect that and will enter bootloader mode and wait for DFU update. Still could you describe what the problem you have now when following my guide ? Please try to test without any modification, the device should advertise as DFUTarg, you can check it using nRFConnect app on the phone or PC.