Jump to bootloader buttonless

RE: Jump to bootloader buttonless

Benjamin Schlegel — Tue, 25 Jul 2017 09:06:09 GMT

I added fs_init() just as described in devzone.nordicsemi.com/.../

Now the flash opteration works. I still needed to add NVIC_SystemReset() at the end of enter_bootloader(). Not the intended way but now it works for me.

RE: Jump to bootloader buttonless

Hung Bui — Tue, 25 Jul 2017 08:57:30 GMT

I would suggest to test with the experimental_ble_app_buttonless_dfu and see why it works there but not in your application.

RE: Jump to bootloader buttonless

Benjamin Schlegel — Mon, 24 Jul 2017 06:32:08 GMT

You are right. flash erase fails. nrf_dfu_flash_erase() in nrf_dfu_flash_buttonless.c calls fs_erase(). I get error "FS_ERR_NOT_INITIALIZED" in fs_erase()

RE: Jump to bootloader buttonless

Hung Bui — Fri, 21 Jul 2017 13:40:21 GMT

It's triggered when the flash updating is finish (writing to bootloader setting), inside flash_callback() , you can find sd_ble_gap_disconnect() called there.

I suspect that flash operation has never been finished.

RE: Jump to bootloader buttonless

Benjamin Schlegel — Fri, 21 Jul 2017 13:00:53 GMT

ble_dfu_on_ble_evt() is called in ble_evt_dispatch(). If I set a breakpoint in on_disconnect() it never stops there. Who triggers BLE_GAP_EVT_DISCONNECTED event? It seems that this event never happens. In buttonless example on_disconenct() is called. But I cant see the difference to my app.

RE: Jump to bootloader buttonless

Hung Bui — Fri, 21 Jul 2017 12:14:16 GMT

on_disconnect() is called when BLE_GAP_EVT_DISCONNECTED occurs, this is handled inside ble_dfu_on_ble_evt(). Make sure you put that inside ble_evt_dispatch() in main.c .

RE: Jump to bootloader buttonless

Benjamin Schlegel — Fri, 21 Jul 2017 11:23:48 GMT

with the experimental ble_app_buttonless_dfu example + bootloader it works. After jump to bootloader the device is still in application even the notification states Response for: Enter Bootloader Status: Success"

With the use of breakpoints I can see that the enter_bootloader() is called. The notification is triggered. The s_dfu_settings.enter_buttonless_dfu is set to true and nrf_dfu_settings_write gets called and runs completly. I cant see code where on_disconnect() is used after all of that. Where should on_disconenct() be called?

RE: Jump to bootloader buttonless

Hung Bui — Fri, 21 Jul 2017 10:56:13 GMT

Hi Benjamin,

If you test with the experimental_ble_app_buttonless_dfu , can you switch to the bootloader ?

What exactly happened when you "never jump to the bootloader" ? The device continue to operate in application as normal ?

Have you check if enter_bootloader() inside ble_dfu.c is called ? What the buttonless dfu example does is to write to bootloader setting , wait for the flash update is complete, then disconnect and on_disconnect() it will trigger a softreset to jump to bootloader.