Timeslot request leads to HardFault

[sewes]

Hello Community,

I want to request a timeslot with sd_radio_session_open(). Whenever i call this API function, the Application crashes with a HardFault.

I have no idea what is causing this issue. Any ideas?

<00> error> hardfault: HARD FAULT at 0x000355B6
00>
<00> error> hardfault:   R0:  0x000355C1  R1:  0x00000000  R2:  0xE000E100  R3:  0x00000000
00>
<00> error> hardfault:   R12: 0x00000000  LR:  0x000356DF  PSR: 0x61070025
00>
<00> error> hardfault: Cause: The processor has attempted to execute an instruction that makes illegal use of the EPSR.

[Susheel Nuguru]

you cannot call any sd_xxx related calls from the interrupt context which are higher in priority than the SVC call.

As you can see here that SVC interrupt priority on nRF52832 is set to 4. And if your interrupt handler from where you are calling sd_xxx function has a priority higher (lower in actual number = higher priority on ARM core) then it would generate a hardfault.

[sewes]

Ups...You're right. I missed this fact.

Thank you very much :-)

Problem solved!