I'm still also unclear if I'm doing something wrong on the slave=20 (PIC1825K42) side, but that's MCC-generated code, which is very=20 undocumented. I was told that I pretty much need to figure that out=20 from the header file comments. Either way, nothing that the slave does should cause the master to=20 crash/reset. My local FAE has tried to convince me that the MCC/harmony/libraries=20 would save me time and aggravation, but I'm far from convinced at this=20 point. At least with my own code, I know where to look for issues. Cheers, -Neil. On 10/15/2018 3:49 PM, Harold Hallikainen wrote: > I have always talked directly to the I2C port instead of using the > library. Also, for me to get I2C to work, I generally need a logic > analyzer to watch the bus and a debugger for the PIC. It's very difficult > for me to get I2C working without the debugger and logic analyzer (may be > impossible... never tried!). > > Not much help... > > Good luck! > > Harold > > > --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .