about Tx time stamp

Wireless Connectivity Ultra-Wideband
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1

Hi, I want to get Tx time stamp using dwt_readtxtimestamp, but every time the lowest byte I got is 52, I dont know why this happens. Anyone tried this?

[15:36:08.063] TX_Time stamp:
[15:36:08.063] 52 122 158 23 148
[15:36:08.066] TX_Time stamp:
[15:36:08.269] 52 162 201 35 151
[15:36:08.269] TX_Time stamp:
[15:36:08.473] 52 142 50 48 154

2

Hi
you should know (from DW1000 UM section 3) that DW1000 raw time of transmission has the low 9 bits of the TX timestamp set to 0. The frames are sent on 8ns boundary. When you add TX antenna delay to this (which prob has non zero lowest byte) you will have a constant value in the lowest byte.