DW1000 not working Tag and determination of coordinates in Node

[Dmitry]

Hi,

Connected SYNC, implemented next but the same problem.

@mciholas

You can do the SYNC circuit without any flop if you want. Simply output it from the processor, asynchronous to the 38.4 MHz clock, and it can be longer than one pulse width without issue. Yes, this violates the setup and hold times most of the time and there will be a chance the SYNC will not happen on the same clock pulse at each DW1000. But that is easily detected when you receive a packet and the RX-TIME will be 26 ns off, way more than is sane for a PDoA device with two closely spaced antennas. Then just SYNC pulse again until you get both DW1000s aligned. We’ve built devices like that with multiple DW1000s and it works fine, less than 5% of the time do you need to resync, and no added parts! Just need to add a little bit of resync code and you are all set.

I noticed that in PDoA Kit XTAL2 connected to the GND via 100pF capacitor. But in our board XTAL2 not connected. Could this be a reason?