On Nov 4, 2007, at 5:41 PM, Jeongyeup Paek wrote:
To close the thread for now... my hypothesis was wrong. I went back to t1/CntToRfm/TOSBase, t2/BlinkToRadio/BaseStation, on the same testbed and the range seems to be identical. The main difference between my code and above (I think) is capturing timestamp at sfd interrupt. I need further investigation and experiments with my code. Thanks to everyone for help.
Good to know. Thanks for following up on this. Yeah, interrupt handler durations are tricky on radio stacks; when Sam Madden was writing TinyDB, he observed something very similar, and it took him and Wei Hong about 2 days to figure out the cause was changing timestamps from 16 to 32 bits; the few extra cycles made packet reception drop by something like 80%.
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