Debug mode is not working in Segger Embedded Studio?

[vishal]

We are using nRf52840 chip with Nordic SDK 15.0 version using SES IDE. When we use debug mode in build configurations program is not working or not debugging got error as a unknown function and stop running in below function:

void idle_state_handle(void) {
  if (NRF_LOG_PROCESS() == false) {
    nrf_pwr_mgmt_run();
  }
}

But when we select release mode the program is working fine. But we want to debug our code with break points, so will you please give me solution why program is not working in debug mode. Is any other setting that we need to configure in segger embedded studio for debugging. 

Thanks in advanced.......

[awneil]

vishal said:

got error as a unknown function

Please explain that.

What, exactly, did the message say? copy & paste the full text.

Where, exactly, did you get it - is it a build error, or while debugging?

[vishal]

The segger IDE is not showing proper error message the following screen got and stop application running. Is not showing any message or something other:

We have selected debug config from here as given in following image:

We are not getting any built error or any other error also, our application is directly stop running and said unknown function as described in first image in debug mode.

Thanks...

[awneil]

It says "unknown function" because you have stopped the code at a point which does not correspond to any code in any of your source files.

Most probably, it is in the SoftDevice.

Or it has crashed and is executing "random" code.

[Vidar Berg]

Hi,

The program appears to have entered the hardfault exception handler inside the MBR. It's normally forwarded to the main application, but will get trapped if breakpoint on hardfault is enabled in SES. Make sure you have this breakpoint disabled in the breakpoints view.

Breakpoints window. Start a debug session and use Ctrl+Alt+b to open view. 

This should ensure that the hardfault exception is forwarded to the application. Then you can use the HardFault handling library to determine if the fault was indeed caused by NRF_LOG_PROCESS.

[vishal]

Thanks for replay...

I have disabled all breakpoints and also disabled HardFault break point as attached following image:

But my application is not actually running not BLE adverting, Not showing all LOGS.

Will you please help me or provide step for How i implement   HardFault handling library  in my application to determine if the fault was indeed caused by NRF_LOG_PROCESS.

Thanks...!!

[Vidar Berg]

You need to halt the CPU to see where the program is stuck. It's probably going to be in the hardfault handler. 

vishal said:

Will you please help me or provide step for How i implement   HardFault handling library  in my application to determine if the fault was indeed caused by NRF_LOG_PROCESS.

Did you include hardfault_implementation.c and hardfault_handler_gcc.c from \components\libraries\hardfault in your project? You also need to enabled the hardfault handler in sdk_config.h

[vishal]

When i added this libraries into my project and enabled hardfault handler in sdk_config.h the got error like

<error> hardfault: HARD FAULT at 0x000273AA
<error> hardfault:   R0:  0x00140101  R1:  0x00000000  R2:  0x00000001  R3:  0x02FE2B00
000000
ult).
<error> hardfault: Bus Fault Address: 0x02FE2B04

Will you please tell me why this error coming where is exactly issue..

 Thanks..