DFU issue with UART

RE: DFU issue with UART

Amanda Hsieh — Thu, 24 Oct 2019 09:19:11 GMT

Hi Avi,

Why would you disable HWFC?

Please enable HWFC which might solve the problem. Please see this post.

-Amanda H.

RE: DFU issue with UART

Avi A — Tue, 22 Oct 2019 17:03:25 GMT

Hi Amanda,

Thank you for responding. I have not made any changes to pca10040_uart_debug example except for disabling HWFC in sdk_config.h.

I tried additional debugging as you suggested. I found that everything works after DFU until the app_start. In the app_start the issue occurs at the jump_addr step

if (current_isr_num == 0)
{

jump_to_addr(new_msp, new_lr, reset_handler); // Jump directly to the App's Reset Handler.
}

Following is the my last debug log before reset, that I am seeing which I added before the above step.

<debug> app: jump_to_addr current_isr_num: 0 new_msp: 200012E0 reset_handler: 243D1

I am not sure why the jump to addr does not work. I have no issues with the app when I run it with just the softdevice.

RE: DFU issue with UART

Amanda Hsieh — Tue, 22 Oct 2019 12:27:09 GMT

Hi Avi,

Did you modify the secure_bootloader\pca10040_uart_debug example? If so, what is that?

It looks like it reset before the nrf_dfu_settings_init() in the nrf_bootloader_init(). Could you check it execute dfu_enter_button_init() or not? You add a debug info as

NRF_LOG_DEBUG("dfu_enter_button_init");

-Amanda H.