nRF52840-Preview-DK: NRF_BREAKPOINT_COND is encountered when APP_ERROR_CHECK(err_code) executes

[syt1293]

Hi,

In my project, I am interfacing various modules (UART over ble, ADC, SPI, I2C) on nRF52840-Preview-DK board. I use IAR Embedded Workbench with nRF5_SDK_15.2 for code bring up. At this point, I have everything compiled in a single project with no compilation errors. Essentially, I hit NRF_BREAKPOINT_COND whenever APP_ERROR_CHECK(err_code) is called. Interestingly, this happens only when APP_ERROR_CHECK(err_code) within BLE related functions executes. Everything worked smoothly before I added the UART over BLE from SDK in the project.

Thanks!

[Turbo J]

Check the err_code variable in the debugger. You will only hit NRF_BREAKPOINT_COND if err_code was non-zero.

A non-zero err_code means there was an error in the previous function or SD call.

Identifying and fixing the bug will be OPs task - we don't see any source code.

[syt1293]

Thanks for the reply.

Yeah, I did that first thing. Surprisingly, value of err_code is zero and I still get NRF_BREAKPOINT_COND. That's why, for now, I commented out the APP_ERROR_CHECK(err_code) call which is not a great solution.

[Turbo J]

How did you test the value of err_code? In some cases the debugger might lie to you.

APP_ERROR_CHECK( 0 ) should not execute anything besides the zero value test.

Commenting out the APP_ERROR_CHECK just ignores the error, which usually also means some function won't work properly.