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lab11 / polypoint

Indoor localization based on the DecaWave DW1000.
Apache License 2.0
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Ranges are often reported as -2 million meters #6

Closed bpkempke closed 8 years ago

bradjc commented 8 years ago

I believe that is an error code.

https://github.com/lab11/polypoint/blob/master/software/firmware/oneway_tag.h#L24

bpkempke commented 8 years ago

This issue has been solved with commit c34a247d83d63a63692f4040b74ec41144df9d68. It turns out that if you receive a message too quickly after configuring the receiver, the incoming packet data will contain a variety of bit-shifted portions of the last received packet. Padding has been applied to the beginning and end of the ranging response windows to avoid this.

bradjc commented 8 years ago

I'm glad you found and solved this. I saw this happen and thought I was crazy because what chip messes up bits in bytes over SPI?