52832 dfu issue

[king001]

SDK:nRF5_SDK_16.0.0_98a08e2

Hardware：52832QFAA

I refer to the code of ble_app_buttonless_dfu to port to ble_app_hrs_freertos but the following problems occur during the upgrade process

00> <error> hardfault: HARD FAULT at 0x00000000
00>
00> <error> hardfault: R0: 0x20004A78 R1: 0x20004AA0 R2: 0x00000008 R3: 0x00000000
00>
00> <error> hardfault: R12: 0x00000000 LR: 0x000365D7 PSR: 0x60000000
00>
00> <error> hardfault: Cause: The processor has attempted to execute an instruction that makes illegal use of the EPSR.

here are some detail info。

Ⅰ、app demo：

1.ble_app_buttonless_dfu

2.ble_app_hrs_freertos

Ⅱ、dfu demo：

/secure_bootloader/pca10040_s132_ble_debug

Ⅲ、My upgrade steps are as follows：

1.\nRF5_SDK_16.0.0_98a08e2\examples\dfu\secure_bootloader\pca10040_s132_ble_debug\armgcc\Makefile$make flash

2.\nRF5_SDK_16.0.0_98a08e2\examples\ble_peripheral\ble_app_hrs_freertos\pca10040\s132\armgcc\Makefile$make flash_softdevice

3.\nRF5_SDK_16.0.0_98a08e2\examples\ble_peripheral\ble_app_hrs_freertos\pca10040\s132\armgcc\Makefile$make flash

4.nrfutil pkg generate --hw-version 52 --application-version 0xff --application nrf52832_xxaa.hex --sd-req 0xcb --key-file private.pem dfu.zip

5.put step4 dfu.zip in nRF Connect(IOS 2.2)  than start dfu

Ⅳ、if I eraseall then do step 1->2->4->5 the dfu can be success.but do 1->2->3->4->5 , I can find adv in nRF Connect,but  when I do step 5,the error log turn up.

 

How can I solve this problem?

Why does it not automatically reset whether I add a watchdog or not?

[Vidar Berg]

Hello, 

Have you tested this with Android as well? I wonder if it could be related to the "advertising rename" feature used by iOS as was the case in this other thread from yesterday: https://devzone.nordicsemi.com/f/nordic-q-a/59881/advertising-rename-feature-not-working.  Hardfault will be triggered if you attempt to use the rename feature without having set up to SVCI interface. 

[king001]

thx for Vidar Berg,you are a good guy.

I have solve it. the reason is I have not call this function

err_code = ble_dfu_buttonless_async_svci_init();

APP_ERROR_CHECK(err_code);

But I have new question.

when i do step 5 ,during the time , I cancel the dfu, and then all the time Always in "Dfuxxx" state.

What I want is that no matter when the dfu is canceled at any dfu time, the program should run to the app state, but now it is in the dfu state, what can I do to do this？

[Vidar Berg]

Thanks for confirming that it worked.

king001 said:

"Dfuxxx" state.

What I want is that no matter when the dfu is canceled at any dfu time, the program should run to the app state, but now it is in

 Does it stay in DFU mode even after you reset the device? That would indicate that the existing application was deleted as a part of the DFU process (eg in case the app image was too big for a dual banked update). There is the Abort command which should let you cancel DFU like you want, but I'm not sure if it's used by the dfu library. You may have to issue the command in your app if not.