ANT minimum channel period on nRF51422

RE: ANT minimum channel period on nRF51422

Luca122131 — Fri, 03 Jul 2015 06:16:00 GMT

Ok, thanks!

RE: ANT minimum channel period on nRF51422

Petter Myhre — Thu, 02 Jul 2015 15:10:20 GMT

You want a message rate of 100Hz, then you need to set the channel period value to 32768/4 = 327.68->328. Just follow the example below equation 5-2.

RE: ANT minimum channel period on nRF51422

Luca122131 — Thu, 02 Jul 2015 14:53:32 GMT

I think that's correct using 10 for 100 Hz because the period is defined:

Period = 32768 / MessageRate (Hz)

in D00000652_ANT_Message_Protocol_and_Usage_Rev_5

Am I wrong?

RE: ANT minimum channel period on nRF51422

Petter Myhre — Thu, 02 Jul 2015 14:44:59 GMT

The limits for the nRF51422 depend on a set of parameters, number and types of channels etc. But if you only have one transmit/receive channel, 200Hz should be achieveable. But you should test your setup to check that you actually achieve it.

I believe the usPeriod should be the period in 32768Hz counts. So for 4Hz you insert 32768/4=8192. While for 100Hz you insert 32768/100=327.68->328. If you insert 100 you will actually try to use a frequency of 327.68Hz.

Please let me know how it goes.