nRF5 SDK Scheduler Tutorial

RE: nRF5 SDK Scheduler Tutorial

user56525 — Thu, 17 Sep 2020 12:10:24 GMT

I am wondering, by which value I need to extend the scheduler event queue event data size i.e. SCHED_MAX_EVENT_DATA_SIZE, when using SoftDevice handler library? Maybe += sizeof(ble_evt_t)? Or is this handled internally?

RE: nRF5 SDK Scheduler Tutorial

user92259 — Mon, 03 Aug 2020 11:08:40 GMT

Hi Everyone, Has anyone been able to build a scheduler of the above example and implemented it in the nRF9160 DK. If so, can you let me know the dependencies or changes that I need to do here to get it woking in my nR9160 DK. Thanks :).

RE: nRF5 SDK Scheduler Tutorial

user90875 — Thu, 18 Jun 2020 10:48:24 GMT

Really nice tutorial and easy to understand the basic! Thank you verrrrrrrrrry much!!!

RE: nRF5 SDK Scheduler Tutorial

user18026 — Fri, 10 Apr 2020 06:13:05 GMT

Is this a typo: setting NRF_SDH_DISPATCH_MODEL to 1 (NRF_SDH_DISPATCH_MODEL_POLLING)

RE: nRF5 SDK Scheduler Tutorial

user69018 — Fri, 17 Jan 2020 09:46:52 GMT

[embed:dc8ab71f-3b98-42d9-b0f6-e21e02a0f8e2:b8bc0d85-5ddc-452c-b00f-8ce031e2d387:type=text&text=%23define%20SCHED_MAX_EVENT_DATA_SIZE%20%20%20MAX%28sizeof%28nrf_drv_gpiote_pin_t%29%2C%20APP_TIMER_SCHED_EVENT_DATA_SIZE%29]

This does not work, when compiling I get the error "error: storage size of 'APP_SCHED_BUF' isn't constant"

You can do this instead:

[embed:dc8ab71f-3b98-42d9-b0f6-e21e02a0f8e2:bc0a20cd-5b91-4c6f-88e3-53339eb2f3a9:type=text&text=typedef%20union%20%7B%0D%0A%20%20%20%20app_timer_event_t%20timer%3B%0D%0A%20%20%20%20nrf_drv_gpiote_pin_t%20pin%3B%0D%0A%7D%20app_scheduler_storage%3B%0D%0A%0D%0A%23define%20SCHED_MAX_EVENT_DATA_SIZE%20%20%20sizeof%28app_scheduler_storage%29]

RE: nRF5 SDK Scheduler Tutorial

user19122 — Sun, 27 May 2018 02:25:47 GMT

Hi,

I updated the tutorial project to be compatible with SDK V13 and higher. These are complied with GCC against V13.1. Added logging functions via nrf logger. Tested on Nordic nRF52. Happy for someone from Nordic to check and place on their server if deserving.

scheduler_tutorial_pre.zip
http://nodescan.dyndns.org:8080/nswebshare/share/eaacb15c81234ccfa345f2c5a2975a40/scheduler_tutorial_pre.zip

scheduler_tutorial_done.zip
http://nodescan.dyndns.org:8080/nswebshare/share/38ce2397c40247f393f1fce0fa4cfa74/scheduler_tutorial_done.zip

Any comments, fixes welcome.

Regards,

Darren

RE: nRF5 SDK Scheduler Tutorial

user24598 — Sat, 26 May 2018 10:02:07 GMT

Hi, Thanks for the wonderful tutorial. I have one question. I am using scheduler in my application. Scheduler Tasks are using some SD functions which require to have "Valid BLE connection". These tasks are put in the queue as soon as the connection is made and the tasks start executing. Some of the tasks are pretty time consuming involving sending kBs of data to the connected client through notification. Now, my problem is "How to terminate the ongoing task as soon as the connection is broken". Is there a way to terminate the queued tasks on receiving "Disconnection event". Can you please tell me an elegant way to do it?

RE: nRF5 SDK Scheduler Tutorial

user26919 — Wed, 18 Oct 2017 19:06:57 GMT

This tutorial no longer compiles when following the steps. I downloaded the .zip and SDK11 as instructed. At first the example compiles fine. But after making the first change, it no longer compiles.

RE: nRF5 SDK Scheduler Tutorial

user14615 — Mon, 22 Aug 2016 20:04:31 GMT

@Tom - typically interrupt flag is set and Interrupt Service Routine is called when previous ISR is returned. (but arm has more priority levels so it also can happened that later coming IRQ has higher priority and interrupts ongoing ISR). Basically if your ISR are fast you shall be ok. If ISR is too long it either slows down system reaction on other ISR which might be quicker. Or it can skip same IRQ - if you imagine that ISR would clear interrupt pending flag at the end and IRQ would be set again before flag clearing then ISR would be run only once...

RE: nRF5 SDK Scheduler Tutorial

user13885 — Tue, 28 Jun 2016 20:37:47 GMT

Awesome functionality. Really easy to put in if needed.

Thank you for the great design work. it really saves a lot of time.

Ben

RE: nRF5 SDK Scheduler Tutorial

user12611 — Fri, 03 Jun 2016 10:24:50 GMT

It clears all questions of Scheduler. Thanks. :-)

RE: nRF5 SDK Scheduler Tutorial

user13469 — Wed, 04 May 2016 00:08:48 GMT

Thanks for the tutorial!

I have one question.

If you don't use the scheduler and two events arrive at around the same time what happens? For instance, I don't seem to be having any trouble processing timer events and ble stack events in my program which doesn't use a scheduler.

RE: nRF5 SDK Scheduler Tutorial

user13419 — Fri, 22 Apr 2016 13:31:50 GMT

I can confirm this tutorial works smoothly with SDK 11. I don't believe I'm the first to comment here. Makes me think a lot of people out there might not be making full use of this pretty important feature - RJH