It seems like an issue with the crystal or GCLK initialization. Are you using the crystal?
The examples may not have been updated with the latest Board Support Package drivers from Atmel and hence may not have the latest work-arounds in the underlying drivers. Shortcut to the SAMD20J18 Errata sheet.
Thank you for your reply.
Will share by private message.
We are not using the crystal. Its the same way as in the default code available for download in Data stream example. Also, the BMF055 is working without issues in the shuttle board.
Please support us in solving the issue with the BMF055 IC.
Also, is it possible to share the BMF055 shuttle board layout with us? It would help us to compare with our custom PCB and resolve any errors that might have been created while designing our PCB.
Thanks & regards,
In your previous comments, you said you are not using external crystal but i found 32KHz crystal on your schematic.
Does it mean you just not install it on PCB?
If it is the case, you can take a look the errata which my colleague shared to you in comments. there is some extra things need to be take care in your code.
I also attached the BMF055 shuttle schematic in the attachment.