On 1/14/17 3:32 PM, Bob Camp wrote:
Hi
On Jan 14, 2017, at 5:29 PM, Scott Stobbe <[email protected]> wrote:
I don't think wifi is ever going to be a real-time system, as it shares the
ether with all other ISM devices. That said even 1 ms of variation is still
4 orders of magnitude greater than the actual time of flight.
The precision time aspect will most certainly be done in hardware, even if
it's just as simple as a timestamp of receiving the beacon frame.
My concern *is* that it’s going to be like 1588 in that respect. Off we all have
to buy new time stamping hardware. Until that’s all up and running
you don’t get the new timing stuff. Based on what I see, there’s not a lot
of hope for it otherwise.
just rummmaging through some datasheets..
I see that for the SG922-0007 (a WiFi module with AT command set) they
do list a value that can be read for "timestamp of last received packet"
and "timestamp of last transmitted packet"
As to what those might mean??
A Copperhead WiFi shield for Arduino has a microchip MRF24WB0MA on it
(it's a few years old, I think it's been replaced by something newer)
Microchip doesn't make it easy to find the SPI interface details, though.
_______________________________________________
time-nuts mailing list -- [email protected]
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
