Use this test software:
?
See which devices the processor finds from this list:
Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ
Owner - Operator
Big Signal Ranch ¨C K9ZC
Staunton, Illinois
Owner ¨C Operator
Villa Grand Piton ¨C J68HZ
Soufriere, St. Lucia W.I.
Rent it:
Moderator: North American QRO Group at Groups.IO.
Moderator: Amateur Radio Builders Group at Groups.IO.
email:? bill@...
Dr. Bill
Which I2C scanner SW do you use?
Unrelated to audio hat, sometimes when I boot up it does not see LPF or BPF address?
All the others are seen. after some fiddling it will work fine.?
I check the Ribbon cable and headers on the filter control board and lpf board and the all look good.?
Not sure if restarting program clears it up or tweaking hardware solves it.?
If the other I2C address are found I am thinking it is not a Teensy issue, does that sound correct?
Tim?