When is CRC status valid?

RE: When is CRC status valid?

ovrebekk — Fri, 03 Mar 2017 14:09:57 GMT

That is good to hear :)

RE: When is CRC status valid?

Martijn — Fri, 03 Mar 2017 10:09:41 GMT

Yes It works already ;).. but I was looking at my code and was wondering whether it was correct.

RE: When is CRC status valid?

ovrebekk — Fri, 03 Mar 2017 08:23:58 GMT

Sounds good. Keep in mind that you can enable interrupts on any of the events also (which you might be doing already).

RE: When is CRC status valid?

Martijn — Thu, 02 Mar 2017 07:53:02 GMT

Thank you! I suspected it worked like that, but I could not find a clear answer in the documentation. In my code I wait for the radio to leave rx mode after the ADDRESS event and after that check the CRCStatus to be OK and I check the END event has been triggered.

RE: When is CRC status valid?

ovrebekk — Thu, 02 Mar 2017 07:36:50 GMT

If you ignore the second comment then hopefully my response is more clear:
"The CRC status register is valid after the END event occurs" ;)

If you disable the radio before the END event is triggered the CRC status will not be valid.

As such it is quite common to avoid disabling the receiver in the period between receiving the address match and end events, because then you are most likely discarding a valid packet ("fake" packets do occur, but it happens very rarely if you use a 4 or 5 byte address).

RE: When is CRC status valid?

Martijn — Thu, 02 Mar 2017 07:29:01 GMT

You give me 2 answers, ADDRESS or END? If I start the radio in rx mode and the ADDRESS event is triggered(which means a reception is started), and I switch the Radio to RXIDLE right after the ADDRESS event. An incomplete message is received and no END event is triggered. Will The CRCStatus register be valid?

RE: When is CRC status valid?

ovrebekk — Wed, 01 Mar 2017 15:54:16 GMT

The CRC status register is valid after the END event occurs, which means that a packet was received.
If you don't get an address match then no packet is received, and the CRC will not be calculated.

Best regards
Torbjørn