Source code or static library for SysAL

[Roger Leigh]

The Nordic SDK provides headers for a finite state machine, queue, ringbuffer and other utilities in the 802_15_4 library in nRF5_SDK_17.0.2_d674dde/components/802_15_4/api/SysAL/ (sys_fsm.h, sys_queue.h, sys_ringbuffer.h etc).  Object code is provided in static libraries:

$ ar t components/802_15_4/raw/802_15_4_lib_gcc.a | grep sys_
sys_crc.o
sys_debug.o
sys_events.o
sys_fsm.o
sys_init.o
sys_memory_manager.o
sys_queue.o
sys_ringbuffer.o
sys_slab_allocator.o
sys_sleep.o
sys_task_scheduler.o
sys_time.o

Is it possible to use this functionality standalone in application code using just the base NRF SDK, or is it completely tied to the 802_15_4 library?

Is the source code for these modules available?

Many thanks,

Roger

[Edvin]

Hello,

While it is possible to use this without the 802.15.4, I don't know if I would recommend it. Basically, the 802.15.4 is just a shell containing more or less empty libraries. E.g. the sys_sleep only provides events that allows you to go to sleep. To actually go to sleep, you need to implement this yourself.

In addition, this library is written externally, so we don't have the implementation, making it difficult to support (and it is not well documented). So feel free to use it, but unfortunately, you are more or less on your own. 

That being said, the fsm.h/c is not part of this library, so yo can use these as you like. There is also an FSM implementation in our mesh sdk. The same applies to other modules you mention:

SDK\components\libraries\ringbuf,

SDK\components\libraries\queue.

Best regards,
Edvin

[Roger Leigh]

Hi Edvin,

Thanks for the insights.  The fsm code in the Mesh SDK looks pretty similar and we can look at the source to understand its behaviour properly, which would have been problematic for the 802.15.4 implementation since it wasn't documented and would have required figuring out by trial and error.

Thanks again,

Roger