sd_evt_get hang by HardFault_Handler

[RK]

Hello

I am using the nrf51822_Beacon application and SDKv7.1.0. have a issue when sd_evt_get function start executing, after imitatively program counter reach into HardFault_handler, it can not come outside the sd_evt_get().

[Hung Bui]

Hi Rk menat,

Do you have any modification to the code? Do you have the same issue when running normally (not in debug mode ? )

Do you have the same issue when trying with other example ? Which softdevice did you use ?

[RK]

hi Hung Bui,

Yes i modified the code for advertise functionality. it happen when in debug mode and not in normal mode(modified functionality will work fine).

[Hung Bui]

Hi Rk Menat,

When you add a break point and halt the CPU, other peripheral that the stack uses(timer, RTC, PPI, radio) still work and when you call a softdevice API, most likely you will receive a hardfault because the stack already crash.

For debugging you can use UART or Segger RTT to printout the trace.

[RK]

Hi Hung Bui,

what is the right way for one step debug ?

[Hung Bui]

Hi RK Menat, You can debug as long as you don't call further sd_* API. The BLE connectivity will be broken anyway if you add a break point (because the softdevice stops). It's suggested to use UART or Segger RTT to printout debug trace or you can add a breakpoint and step until another sd_* API call.

You can have a look here and here.