Getting Error

[mjconnor57]

I am developing a custom application that was started from 1 of the bluetooth examples for a customer and though I have been using the same custom PCB for 7 months, I am now, for the past few weeks, getting this error any time I run in debug mode. My application will run for a varying amount of time sometimes a second sometimes a minute then it throws the error. 

<error> app: ERROR 3735928559 [Unknown error code] at C:/nRF5_SDK_17.1.0_ddde560/modules/nrfx/hal/nrf_gpio.h:492
PC at: 0x00038B67
<error> app: End of error report

I was told to check out my call stack for further information and perhaps a clue as to which pin is causing this issue but the hex for the pin is changing every instance, I am attaching 2 screen captures as examples.

Any help is greatly appreciated.

Thank you

Matt

[Vidar Berg]

Hello Matt,

The first impression I get after looking at the call stacks is that it looks like a stack or buffer overrun. The pin variable passed to nrf_gpio_pin_toggle() is clearly corrupted, at least.

I found the project you shared with me in an earlier ticket, and it shows the pin number being retrieved from a global array. Can you check what the array index is when the assert is raised, and/or if the array contains the expected pin numbers?

Best regards,

Vidar

[mjconnor57]

Hi Vidar I definitely can check the value in the array, I am just not sure which array you are referring to so I can add it to my watch list?

The board definitions and pin assignment has been steady state since i last provided you the project, could you tell me hte array to check?

[Vidar Berg]

The call stack shows that the assert is raised when nrf_gpio_pin_toggle() is called from the timer2_event_handler() interrupt handler. So my suggestion is to have a closer look at the "this[<index>].stepper_step_pin" assignment.

[mjconnor57]

It seemed normal when it errored out this time;

21 is the correct pin # for stepper_step_pin. Though I got a different UART output than usual, this time it <error> app: SOFTDEVICE: ASSERTION FAILED. 

I will continue to run to see if i can get the same error code I was  typically seeing as this was the first time I have seen the softdevice assertion failed

[mjconnor57]

The second fault was more in line with previous faults throwing <error> app: UNKNOWN FAULT at 0x00038B7F

stepper_step_pin is still 21

[mjconnor57]

And the 3rd failure I got what I typically experience:

<error> app: ASSERTION FAILED at C:/nRF5_SDK_17.1.0_ddde560/modules/nrfx/hal/nrf_gpio.h:492

Hope this information helps.

Thank you for your help so far

Matt