NCS system off fast

NCS system off fasthttps://devzone.nordicsemi.com/f/nordic-q-a/87261/ncs-system-off-fastHello, NCS1.9.1, VSCode ,nRF21540DK, i want to system off fast, but after clicking the button1 many times, it cannot be restarted/awaken. Best regardsen-USTelligent Community 13Thu, 28 Apr 2022 00:35:42 GMTRE: NCS system off fasthttps://devzone.nordicsemi.com/thread/365272?ContentTypeID=1Thu, 28 Apr 2022 00:35:42 GMT137ad170-7792-4731-bb38-c0d22fbe4515:1c016e2c-f28b-4394-a9ec-15b28e77b2e8yoyou<p>thank you,<span>Simon</span></p><div style="clear:both;"></div>RE: NCS system off fasthttps://devzone.nordicsemi.com/thread/365238?ContentTypeID=1Wed, 27 Apr 2022 14:23:32 GMT137ad170-7792-4731-bb38-c0d22fbe4515:9db34c86-1bf0-450b-874b-9a2c89952bb8Simonr<p>Hi</p> <p>Glad to hear you were able to turn the device off correctly.</p> <p>In system OFF mode, the CPU is turned OFF (which is why the power consumption is so low), and thus you won't be able to use it for anything until you turn it back on. </p> <p>Best regards,</p> <p>Simon</p><div style="clear:both;"></div>RE: NCS system off fasthttps://devzone.nordicsemi.com/thread/365060?ContentTypeID=1Wed, 27 Apr 2022 00:52:52 GMT137ad170-7792-4731-bb38-c0d22fbe4515:9be50871-cc62-4b98-b26f-38209ca3f488yoyou<p>Hi,Simon,</p> <p>in main() ,when button pressed,will break while,</p> <p>and call <span>  </span><span>go_system_off</span><span>()</span><span>;</span></p> <div> <div>  </div> <div>I tried system off five times and couldn't wake up again.</div> <div> <div> <div><span style="color:#0000ff;">    press button to go_sysytem_off</span></div> <div><span style="color:#0000ff;">       <span style="color:#008000;">press button  to wake up ok</span></span> <div> <div><span style="color:#0000ff;">    press button to go_sysytem_off</span></div> <div><span style="color:#0000ff;">      <span style="color:#008000;"> press button  to wake up ok</span></span> <div> <div><span style="color:#0000ff;">    press button to go_sysytem_off</span></div> <div><span style="color:#0000ff;">       <span style="color:#008000;">press button  to wake up ok</span></span> <div> <div> <div><span style="color:#0000ff;">    press button to go_sysytem_off</span></div> <div><span>       <span style="color:#ff0000;">press button can't wake up</span></span> <div><span style="color:#0000ff;">    press button to go_sysytem_off</span></div> <div><span>       <span style="color:#ff0000;">press button can't wake up</span></span> <div><span style="color:#0000ff;">    press button to go_sysytem_off</span></div> <div><span>       <span style="color:#ff0000;">press button can't wake up</span></span></div> </div> </div> <img style="font-family:inherit;" alt=" " src="https://devzone.nordicsemi.com/resized-image/__size/640x158/__key/communityserver-discussions-components-files/4/pastedimage1651019932529v1.png" /></div> </div> </div> </div> </div> </div> </div> </div> </div> </div> <p><span style="font-size:150%;">when i change to as follow:</span></p> <div> <div><span style="color:#0000ff;">    k_timer_stop(&my_timer);</span></div> <div><span style="color:#0000ff;">    bt_le_scan_cb_unregister(&scan_callbacks);</span></div> <div><span style="color:#0000ff;">    bt_le_per_adv_sync_delete(sync);</span></div> <div><span style="color:#0000ff;">    bt_le_scan_stop();</span></div> <div><span style="color:#0000ff;">    go_system_off();</span></div> <div><span style="font-size:150%;">problem solved.</span></div> <div><span style="font-size:150%;"></span>    </div> <div><span style="font-size:150%;">one more question:</span></div> <div><span style="font-size:150%;">how to add codes to control LED twinkle or ADCreadBattery_NTC_temperature  in system off mode?</span></div> <div>     </div> </div> <p><span>Best regards,</span></p><div style="clear:both;"></div>RE: NCS system off fasthttps://devzone.nordicsemi.com/thread/364974?ContentTypeID=1Tue, 26 Apr 2022 13:25:09 GMT137ad170-7792-4731-bb38-c0d22fbe4515:d8c99a10-90f0-4e9d-86fa-86ad25464842Simonr<p>Hi</p> <p>Ah, I see. Yes, this is possible, as it's not necessary to have these busy wait and extra sleep calls before going to system OFF. You can just disable the peripherals you're using, and then go directly to system OFF if you'd like. The following snippet can be commented out entirely as long as you disable the UART at some point I think.</p> <p><pre class="ui-code" data-mode="c_cpp"> printk("Busy-wait %u s\n", BUSY_WAIT_S); k_busy_wait(BUSY_WAIT_S * USEC_PER_SEC); printk("Busy-wait %u s with UART off\n", BUSY_WAIT_S); int rc = pm_device_action_run(cons, PM_DEVICE_ACTION_SUSPEND); k_busy_wait(BUSY_WAIT_S * USEC_PER_SEC); rc = pm_device_action_run(cons, PM_DEVICE_ACTION_RESUME);</pre></p> <p>Best regards,</p> <p>Simon</p><div style="clear:both;"></div>RE: NCS system off fasthttps://devzone.nordicsemi.com/thread/364797?ContentTypeID=1Tue, 26 Apr 2022 02:55:40 GMT137ad170-7792-4731-bb38-c0d22fbe4515:98af831e-8b7e-4ec4-8686-3a7c13013f86yoyou<p>Hello,</p> <p><span>"fast" system OFF? means <span style="color:#0000ff;">k_busy_wait and sleep</span> will take time,system OFF process takes 4s,</span></p> <p><span>i want to system OFF less than 2s.</span></p> <p><span>   </span></p> <p><span>is in debug mode (i don't know how to set release mode)</span></p> <p><span>  </span></p> <p><span>system OFF ,when fully entering sleep mode, press the key to wake up，and than press the key go to system OFF,</span></p> <p><span>repeat this action and you will not be able to wake up within 10 times.</span></p> <p><span>(especially in the process of entering system OFF, click the button several times)</span></p> <p><span>  </span></p> <p><span>I hope I can go to sleep mode within 2 seconds after pressing the button to make sure I wake up every time I press the button.</span></p> <p><span></span></p> <p><span>Best regards,</span></p><div style="clear:both;"></div>RE: NCS system off fasthttps://devzone.nordicsemi.com/thread/364739?ContentTypeID=1Mon, 25 Apr 2022 13:22:37 GMT137ad170-7792-4731-bb38-c0d22fbe4515:5f6a9654-acdb-42b2-8938-edd2a3730fa6Simonr<p>Hi</p> <p>Can you explain what you mean about needing a "fast" system OFF? Also, what exact behavior do you see when pressing button 1 multiple times? Is this while in debug mode or in a release build? I need some more information to understand what the issue is and what you want to achieve here.</p> <p>Best regards,</p> <p>Simon</p><div style="clear:both;"></div>