How to convert this into a meaningful timestamp
the documentation for this particular piece of equipment gives the following:
Code:
struct
{
UINT32 CycleOffset : 12;
UINT32 CycleCount : 13;
UINT32 Second : 7;
}BUSTIME;
which is:
Bit[11..0] = Cycle Offset in parts of 1/3072 (=24.576 MHz)
Bit[24..12] = Cycle Count
Bit[31..25] = Second Count
the author of this documentation is...terse, to say the least.
my problem is that i need to ensure that the data i am retrieving from it is obtained after the function call is made. typically not a problem, but this has a buffer ring, and even if i drain it completely on each acquisition cycle, sometimes the data is still from the past :\
the only timestamping information is as follows:
UINT32[2] RxTime Out Receive time as 100ns ticks since 1.1.1601.
UINT32 BeginCycleTime Out When frame start events are active this is the bus time when
the frame start was detected (for bus time see remarks).
UINT32 EndCycleTime Out This is the bus time when the frame end was detected (for
bus time see remarks).
does anyone see a way to obtain the time that the data was actually acquired by the hardware? RxTime connotes to me the time when the data was transferred to me (which is not helpful), as opposed to when it was copied into the equipment's local buffer.
