Multitasking and event handling

RE: Multitasking and event handling

Roger — Tue, 21 Nov 2017 13:54:02 GMT

At the moment, I would like to run two tasks at the same time, both sampling at approximately 1 kHz. My application is quite small, one loop will be reading in IMU sensor measurements and updating a filter algorithm. The other loop will run the control algorithm. I need some codeblocks to execute when some events occur. I will also need to log data on an external SD as close as possible to real-time. Later on, I would like to read and write the data from a tablet to control and monitor the system. There might be additional tasks and events added on at a later stage. As you rightly point out, for multitasking, preemption will be necessary.

Quite new to FreeRTOS and looking forward to using it.

Thanks Dave and Hung for your comments.

RE: Multitasking and event handling

Hung Bui — Mon, 20 Nov 2017 15:33:41 GMT

Hi Roger,

I don't think we implement any multi tasking or real time OS inside our softdevice. It's basically a RTC timer and a scheduler working together. One task finishes before the other, no preemption.

For your application, what kind of limit you are thinking of ? I assume you are planning to do cooperative multitasking ?

I agree with Dave, freeRTOS would suit your need.

RE: Multitasking and event handling

Dave_couling — Sat, 18 Nov 2017 20:42:14 GMT

I'd highly recommend using the freeRTOS framework. Its very well vetted and supported by the community. So debugging issues will be made a bit easier.