I wrote my own interface to your Boiler Plate app (which is very well written btw). I need full 32-bit time stamps so i can replay/fastforward sensor packets for offline analysis. You have a good point though. I can append the extra 16 bits on the host side. Ill go ahead and do that.
Thanks, Nick On Wed, May 25, 2011 at 12:31 AM, mike healy <[email protected]> wrote: > Hi Nick, > > When you ask is there a way to enable 32-bit time stamping, at what level > are you looking to do this? > > The only way to do this is by changing the code. In BoilerPlate all you > need to do is change the timestampX variables from 16 bit to 32 bit, change > the data packet format accordingly (to use 4 bytes for the timestamp instead > of 2), and copy the longer timestamp into the packet (in the > prepareDataPacket() function). > > Note that you would also need to modify the host side software, e.g. > ShimmerConnect, so that it knows that the data packet format is different. > Again, this is easily done if required. > > However, what problem are you trying to solve by using a longer timestamp? > BoilerPlate is designed to be constantly streaming at a rate greater than or > equal to 1Hz. The host side device, be it a PC, laptop, phone or whatever, > surely has a clock with enough resolution to know if it hasn't received a > message for over 2 seconds (the time it takes for the timestamp to roll > over). You are probably better off detecting such a high rate of packet loss > at the host side for a number of reasons, not least that sending an extra > two bytes with every single data packet will have a significant impact on > the shimmer's battery life. > > Mike > > > On Tue, May 24, 2011 at 9:06 PM, Nicholas Hosein <[email protected]>wrote: > >> I noticed that the time stamp in the boiler plate app was 16 bits instead >> of 32. Because of this it rolls over quite frequently. Is there a way to >> enable 32 bit time stamping? >> _______________________________________________ >> Shimmer-users mailing list >> [email protected] >> https://lists.eecs.harvard.edu/mailman/listinfo/shimmer-users >> >> >
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