Implementing DFU trigger library

RE: Implementing DFU trigger library

Hung Bui — Tue, 26 Apr 2022 10:47:49 GMT

Hi Nabeel,

Please try testing with the ble_app_uart example.
Please check the log first to see if there is any assert. From the log of the bootloader you provided it doesn't seem that it stopped at sd_softdevice_enable() instead it printed " Advertising..."

You may want to compile the application without any optimization, and add DEBUG into the preprocessor's symbols in project setting.

RE: Implementing DFU trigger library

Nabeel Ar — Tue, 26 Apr 2022 10:46:49 GMT

Hi,

I've changed the configuration that you said in the bootloader. The OTA DFU works fine now.

Thanks for the support. It's a great help.

Thank you.

RE: Implementing DFU trigger library

Nabeel Ar — Tue, 26 Apr 2022 08:18:53 GMT

Hi,

I've flashed the usbd_ble_uart example and tried to debug. My debug terminal didn't work but still, I was able to step into the code. My debugging stopped in the ble_stack_init(); function, most particularly in SVCALL(SD_SOFTDEVICE_ENABLE, uint32_t, sd_softdevice_enable(nrf_clock_lf_cfg_t const * p_clock_lf_cfg, nrf_fault_handler_t fault_handler)); function def in nrf_sdm.h file. Though I can't able to access the debug terminal, I'm unable to check what error/assert msg I'm getting.

RE: Implementing DFU trigger library

Hung Bui — Tue, 26 Apr 2022 07:21:17 GMT

Hi,

Please try to debug and check if you get any error/assert.

RE: Implementing DFU trigger library

Nabeel Ar — Tue, 26 Apr 2022 05:15:16 GMT

Hi,

[quote userid="2121" url="~/f/nordic-q-a/87201/implementing-dfu-trigger-library/364716#364716"]Have you tested any BLE example in the SDK ? Did it work ? [/quote]

I've tested flashing ble_app_uart and usbd_ble_uart examples. It didn't advertise.

[quote userid="2121" url="~/f/nordic-q-a/87201/implementing-dfu-trigger-library/364716#364716"]

You would need to change NRF_SDH_CLOCK_LF_SRC configuration in sdk_config.h from 1 to 0 to select the RC instead of the crystal.

And NRF_SDH_CLOCK_LF_ACCURACY to 0, NRF_SDH_CLOCK_LF_RC_CTIV to 16 and NRF_SDH_CLOCK_LF_RC_TEMP_CTIV to 2.

[/quote]

It's already in this configuration.

RE: Implementing DFU trigger library

Hung Bui — Mon, 25 Apr 2022 12:26:07 GMT

Hi Nabeel,

If you don't have 32kHz crystal you would need to configure the softdevice to use the 32kHz RC instead.

Have you tested any BLE example in the SDK ? Did it work ?
You would need to change NRF_SDH_CLOCK_LF_SRC configuration in sdk_config.h from 1 to 0 to select the RC instead of the crystal.

And NRF_SDH_CLOCK_LF_ACCURACY to 0, NRF_SDH_CLOCK_LF_RC_CTIV to 16 and NRF_SDH_CLOCK_LF_RC_TEMP_CTIV to 2.

RE: Implementing DFU trigger library

Nabeel Ar — Mon, 25 Apr 2022 11:19:33 GMT

Hi,

[quote userid="2121" url="~/f/nordic-q-a/87201/implementing-dfu-trigger-library/364604#364604"]Please check if you have 32kHz crystal on your board ?[/quote]

We have an internal 32MHz crystal but no low-frequency 32kHz crystal connected to it. Is it important to have connected?

[quote userid="2121" url="~/f/nordic-q-a/87201/implementing-dfu-trigger-library/364604#364604"]If you only flash the softdevice + bootloader would it advertise DFUTarg ? [/quote]

No, it doesn't advertise as Dfutarg. When I debug I am getting the following in the log

<info> app: Inside main
<debug> app: In nrf_bootloader_init
<debug> nrf_dfu_settings: Calling nrf_dfu_settings_init()...
<debug> nrf_dfu_flash: Initializing nrf_fstorage_nvmc backend.
<debug> nrf_dfu_settings: Using settings page.
<debug> nrf_dfu_settings: Copying forbidden parts from backup page.
<debug> nrf_dfu_settings: Destination settings are identical to source, write not needed. Skipping.
<info> nrf_dfu_settings: Backing up settings page to address 0x7E000.
<debug> nrf_dfu_settings: Destination settings are identical to source, write not needed. Skipping.
<debug> app: Enter nrf_bootloader_fw_activate
<info> app: No firmware to activate.
<info> app: Boot validation failed. No valid app to boot.
<debug> app: DFU mode because app is not valid.
<info> nrf_bootloader_wdt: WDT is not enabled
<debug> app: in weak nrf_dfu_init_user
<debug> app: timer_stop (0x20002B04)
<debug> app: timer_activate (0x20002B04)
<info> app: Entering DFU mode.
<debug> app: Initializing transports (found: 1)
<debug> nrf_dfu_ble: Initializing BLE DFU transport
<debug> nrf_dfu_ble: Setting up vector table: 0x00072000
<debug> nrf_dfu_ble: Enabling SoftDevice.
<debug> nrf_dfu_ble: Configuring BLE stack.
<debug> nrf_dfu_ble: Enabling the BLE stack.
<debug> nrf_dfu_ble: No advertising name found
<debug> nrf_dfu_ble: Using default advertising name
<debug> nrf_dfu_ble: Advertising...
<debug> nrf_dfu_ble: BLE DFU transport initialized.
<debug> nrf_dfu_flash: Initializing nrf_fstorage_sd backend.
<debug> app: Enter main loop

Appriciate your help.

RE: Implementing DFU trigger library

Hung Bui — Mon, 25 Apr 2022 07:28:25 GMT

Hi Nabeel,

Please check if you have 32kHz crystal on your board ?
If you only flash the softdevice + bootloader would it advertise DFUTarg ?

If it doesn't you may want to flash the debug version of the bootloader and step into the code and check why it doesn't advertise. You can debug the bootloader the same way as debugging normal application.

RE: Implementing DFU trigger library

Nabeel Ar — Sat, 23 Apr 2022 12:18:04 GMT

Hi,

[quote userid="2121" url="~/f/nordic-q-a/87201/implementing-dfu-trigger-library/364501#364501"]I assume by "pca10100_s140_ble bootloader" you mean the bootloader in "\examples\dfu\secure_bootloader\pca10100_s140_ble" ? [/quote]

Yes.

[quote userid="2121" url="~/f/nordic-q-a/87201/implementing-dfu-trigger-library/364501#364501"]I would suggest to get familiar with this bootloader before you move to any further step. Make sure you can do a DFU update with this bootloader before trying to implement DFU buttonless.[/quote]

I've tried flashing bootloader, softdevice and bootloader setting page in my nRF52833 DK and my custom board. It works fine in DK where I can upload the zip packet and also application runs fine. But while flashing in my custom USB board it doesn't even advertise as "Dfutarg".

why it is so?

RE: Implementing DFU trigger library

Hung Bui — Fri, 22 Apr 2022 13:38:40 GMT

Hi again Nabeel,

I assume by "pca10100_s140_ble bootloader" you mean the bootloader in "\examples\dfu\secure_bootloader\pca10100_s140_ble" ?

I would suggest to get familiar with this bootloader before you move to any further step. Make sure you can do a DFU update with this bootloader before trying to implement DFU buttonless.

Note that the bootloader, out of the box, works as a peripheral, not a central. You would need to modify it to make it a central with the same services and characteristics.

The DFU trigger library nrf_dfu_trigger_usb.c has nothing to do with the DFU buttonless. It requires a button to be pressed to put the device to DFU mode. So it may not relevant to your application.

What you need to do is to study the \examples\ble_peripheral\ble_app_buttonless_dfu and implement the DFU buttonless service in your application.

RE: Implementing DFU trigger library

Nabeel Ar — Fri, 22 Apr 2022 11:43:07 GMT

Hi,

[quote userid="2121" url="~/f/nordic-q-a/87201/implementing-dfu-trigger-library/364446#364446"]Could you point me to the DFU trigger library you are using ?[/quote]

Its in \components\libraries\bootloader\dfu\nrf_dfu_trigger_usb.c and \components\libraries\usbd\class\nrf_dfu_trigger\app_usbd_nrf_dfu_trigger.c

[quote userid="2121" url="~/f/nordic-q-a/87201/implementing-dfu-trigger-library/364446#364446"]Please let me know how you are planning to do DFU update ? Is the USB device advertising as a peripheral and get connected by a phone ?[/quote]

I'm trying to do Buttonless DFU to my custom USB device which acts as a central. My USB device will do the scanning and I'll connect it with my nrf connect mobile app (advertiser). I'll initiate the dfu process by clicking the dfu icon in the top right of nrf connect app and I'll select the zip file and upload it. But it shows "Bootloader not found" error message.

[quote userid="2121" url="~/f/nordic-q-a/87201/implementing-dfu-trigger-library/364446#364446"]Regarding "Bootloader not found" error, this means you need to flash the bootloader to be able to use the buttonless service. [/quote]

I've flashed pca10100_s140_ble bootloader in it.

RE: Implementing DFU trigger library

Hung Bui — Fri, 22 Apr 2022 11:11:32 GMT

Hi Nabeel,

Could you point me to the DFU trigger library you are using ?

If you are trying to do Buttonless DFU you may want to have a look at this example: \examples\ble_peripheral\ble_app_buttonless_dfu

I don't think it has anything to do with the GP pin shortened with the RESET pin.

Please let me know how you are planning to do DFU update ? Is the USB device advertising as a peripheral and get connected by a phone ?

Regarding "Bootloader not found" error, this means you need to flash the bootloader to be able to use the buttonless service.

I would suggest to get familiar with the bootloader before you implement the buttonless service. I have a tutorial here that might be useful for you.