Significant updates. Compiles and works, though not test significantly nor assumed to be particularly robust. I2C comms between Raduino and TeensyDSP. Some amount of functioning CAT. Haven't tried with any applications e.g. WSJT-X.

Raduino/ubitx_keyer.ino

@@ -296,7 +296,7 @@ void cwKeyer(void){
         return;                   //Tx stop control by Main Loop
       }
 
-      Check_Cat(2);
+      //Check_Cat(2);
     } //end of while
 //  }   //end of elese
 }