time synchronization across different nodes in a mesh network, single hop as well as multi hop.

[khosla]

I am working on time synchronizations between different nodes in a mesh network. I have earlier worked on the radio and the ppi examples given. I wish to generate time stamps at each send and receive events between two different nodes for which i am using the nRF radio along with two crystal oscillators, 16 M XOSC as well as 32.768 KHz XOSC with quartz crystal. Could you let me know that if i am using the ppi with the radio functionality, how do i define the two nodes in my code between which i want to send packets. then can i extend this case for n nodes too.

[Hung Bui]

Please attach your code as a text file. Please have look again at your comment above, how would you expect me to read what you pasted ?

You still haven't described clearly enough what you are planing to do and what the difficulties you have. Please try to follow the tutorial and get back if you have issues.

[khosla]

You can find the receiver functionality slightly above the main function. Since i am still experimenting on this, i was earlier thinking to collect the timestamp information (send and receive times) with the help of wireshark and analyser. But this won't be precise enough since there is no idea of the clocks analyser is using and that wireshark receive times can't be relied on. Although this could be done as a verification part only. I now ought to add some more timer functionality to achieve this. But i had another query that if i use the capture functionality in hardware timer, how do i go about it without CPU intervention, as we are normally doing this by calling TASKS_CAPTURE for each capture event in the code. But this involves CPU. What's the other CPU independent way for doing this. Would appreciate your advice!!!