example ble_app_uart_c run error

[Jacky Chang]

Hi Sir, 

I use the example ble_app_uart_c, the program runs to APP_UART_FIFO_INIT() in uart_init(), an error will occur, and the program jumps to NRF_BREAKPOINT_COND --> System reset, how to fix and set it? 

Development environment:
keil5
Device: nRF52840
SDK: nRFSDK160098a08e2(v16.0.0)
Softdevice ver.: nrf57-7.0.1
DeviceFamilPack: v8.32.1

example: example\ble_central\ble_app_uart_c

Regard and Thanks,

Jacky.

[Karl Ylvisaker]

Hello Jacky,

Could you make sure that DEBUG is defined, so that you may see where the error is generated, and what the error code is?
I would suspect that you are experiencing UART initialization error, for example as the result of an invalid callback function or similar.

Could you elaborate on the behavior of the example up until the crash?
It would also be helpful if you could share the parameters you are providing APP_UART_FIFO_INIT with.

Best regards,
Karl

[Jacky Chang]

Karl, Thank you!

1. This sample program is the official source code, I have not made any changes.

2. Before crash, execute nrfx_uarte_rx(), see return error code below.


3. This is the parameter data before APP_UART_FIFO_INIT() enters


4. Enter the parameter value of crash.


5. log file
8836.JLinkLog.txt

[Karl Ylvisaker]

Hello Jacky,

It seems to me that the device fails while initializing the UART module.

How is your hardware configuration when you power on the device?
I have tested this example myself, without fail, but I have heard about customers receiving an error when initializing UART with the UART pins floating.
Could you verify for me that your UART pins are connected to their target when you power on your device?

Furthermore, your included screenshots does not show which error code is generated.
Could you add "DEBUG" to your preprocessor defines in the keil project settings?
This should enable you to see which specific error the app_error_handler is called with.

Best regards,
Karl