Hi Nordic
My program can build pass, but it can lock nrf51822 . Do you know what error can cause it ?
I am looking forward to receiving you reply !
Your question is difficult to understand and include very little information. I recommend you to read this blog and edit your question.
I wild guess; could it be that you call sd_power_system_off() somewhere?
sd_power_system_off()
I can dowmload first time ,but i can not download next time . error :No Cortex-M SW Device Found . keil can not identify nrf51822 and cannot debug .