Boron CHG light flashing rapidly and not starting


#1

Hey All,

I have a Boron communicating with an Itsybitsy M0 over the I2C bus and everytime I power the boards up at the same time the boron CHG light starts flashing rapids and it will not start. If I start the Boron first and then start the M0 after everything comes up and they communicate correctly. Any thoughts on what would be preventing the Boron from starting? I know that the power ic and fuel gauge communicate over the I2C so I’m wondering if that is somehow related.

I really appreciate your input. Thank you!


#2

It sounds like your power supply cannot supply enough current to start up both boards at once. The Boron charge light flashing indicates not enough charging current. Take a look at your power supply and consider increasing available current to the boards.


#3

Thank you for the suggestion. I think that I’ve been able to track down the issue. It seems to be related to a busy line that I had configured that was sending an output to a pin on the Boron. The same power supply has been used on other PCBs without issue. It is still somewhat of a mystery, but the issue hasn’t presented itself since the change. Hopefully at some point the U8G2 SOS issue will be resolved then I can remove the ItsyBitsy that is driving the display.