802.15.4 lack of documentation about example and API

[seneryilmaz]

I'm trying to implement a previous project on nRF52. However, lack of documentation about 802.15.4 is overwhelming. Also there is only one example which is Wireless UART. I'm trying to figure out working princible of this example but its documentation is about how to get it working not about how it works. I think at least a state chart about FSM should have been provided.

[Edvin]

Hello,

Thank you for reporting.

I agree that the 802.15.4 documentation from the SDK is not great. However, it is not much used. Our Zigbee and Thread SDK use a different 802.15.4 stack that is a bit more tested (but it is a driver without the MAC layer). 

The FSM doesn't have a graphical representation, but perhaps you are able to deduce the states and actions used if you look at the m_transition_table[] on line 142-174 in fsm.c 

Do you intend to use Thread or ZigBee? Or do you intend to use the raw 802.15.4 driver?

I assume you have found the information on infocenter regarding the 802.15.4 drivers.

Best regards,

Edvin

[seneryilmaz]

Also, there is a recent problem that I faced. I can't compile the project when I use falling asleep API. It gives me error: sys_sleep.c:(.text.sys_sleep_approver_register+0x2e): undefined reference to `ffs'

[Edvin]

What chip are you using? Is it the nRF52840? What "falling asleep API" do you refer to?

Please note that these examples don't have the same timeslot functionality as BLE, so the radios need to be listening when they do not transmit. 

[seneryilmaz]

Yes, it's nRF52840. I'm refering to falling asleep API in 802.15.4 system abstraction library. 

nRF5 SDK v16.0.0 > API Reference > IEEE 802.15.4 stack API > System abstraction library > Falling Asleep API

[Edvin]

What IDE do you use? And what function did you call, or what header did you include when that compile error occured?

BR,

Edvin