nrf51822 HardFault

[Mr.Li]

Hi Nordic Tech support team, Now, I burn my nrf51822 softdevice Bootloader and application by nRFgo Studio tool。There are some problems as follow： (1) When I burn softdevice firmware and I choice enable softdevice protection，When I burn application firmware and run， occur HardFault error. I check my application code, I find that HardFault error caused by code " NRF_POWER->RESET = 1". If I delete "NRF_POWER->RESET = 1",My application firmware run well.

(2) When I don't choice enable softdevice protection and don't delete code, "NRF_POWER->RESET = 1",My application firmware run well，too.

(3) When I use nrfjprog.exe to burn firmware， don't delete code, "NRF_POWER->RESET = 1", My application firmware run well，too.

I find nRFgo Studio tool enable softdevice protection by default, if I disable it, What are the effects ? I want to my application to support hard reset function, i find i have to write code，NRF_POWER->RESET = 1. How can get the reason of HardFault error? Why do I set RESET “NRF_POWER->RESET = 1” code cause HardFault error？ Thanks ！

[Petter Myhre]

When using the SoftDevice the power peripheral is restricted, as you can see here.

NRF_POWER->RESET = 1 enables pin reset in debug interface mode, is this what you want to do? Or do you want to reset? Then you can use sd_nvic_SystemReset().

[Petter Myhre]

On the nRF51, in normal mode (not debug), the reset pin will always be enabled. You don't have to do anything.