I can't get the FM Radio to work on DUE. The SI4703 chip will not initialize. It appears to lock up the DUE. The SI4703 work great on mega but not on DUE. It is a i2c interface with a pin for reset. I think the issue is in the wire library. Or at least that is the way it looks to me.
I am using this library I commented out A4 and A5 also tried changing them to 20 and 21. No Luck. I also tried with it hooked up to A4 and A5.
I am unfamiliar with i2c that does not have address. Unless I am misunderstanding what I am reading it uses pin 2 to initialize the device and start communication on the bus. There is not and address involved. I did find a document that said it had an address of 0x11 So I tried it with a i2c scanner sketch and it comes back as no devices found.