nrf51822 is locked by program

[wiki]

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 !

[Petter Myhre]

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?

[wiki]

I mean my program can be builded pass,but nrf51822 will be not work when I download this program .Meanwhile , I can not download any program next time.If I want to download again , I have to reset by J-Link commander . So I do not know what error can cause it and how can I avoid it .

[Petter Myhre]

Are you able to download it? Do you get an actual error? What is it? If you can download, have you tried to debug?

[Stian Røed Hafskjold]

Does the same thing happen with the example code (without modifications), or is it only your custom code? Are you using SoftDevice?

[wiki]

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 .