Hi,
i want to evaluate the time interval between "ARM side sending some data"
and
"DSP side really receive those data( ready to process those data)" and vice
versa.
if i use following way to evaluate, it can just evaluate the time comsumed
in "send" or "receive",
not intervel from "sending" to "finish receiving".
ARM or DSP side:
start = get_time();
send_to_another_side(&data);
end = get_time();
(can only get "end - start")
due to above reason, i want to use the following way:
ARM side DSP side
start = get_time(); receive_data(&buff);
send_data(&data); end = get_time();
but the essential condition is the "get_time" in both side must be in the
same time domain.
for instance, if "get_time" value is obtained by query OS timer counter
respectively, then they aren't in the
same time domain due to they(arm and dsp) use different timer as their OS
timer.
so i wonder is there any RTC (real-time counter) that shared by both side in
Davinci?
so that i can query "get_time" from it (the same time domain).
or
any idea about how to evaluate the time interval?
thanks in advance.
best,
kashin lin
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