Enable input on pinMode OUTPUT to support reading back current value via digitalRead

cores/arduino/wiring_digital.c

@@ -58,8 +58,10 @@ void pinMode( uint32_t ulPin, uint32_t ulMode )
     break ;
 
     case OUTPUT:
+      // enable input, to support reading back values
+      PORT->Group[g_APinDescription[ulPin].ulPort].PINCFG[g_APinDescription[ulPin].ulPin].bit.INEN = 1 ;
+
       // Set pin to output mode
-      PORT->Group[g_APinDescription[ulPin].ulPort].PINCFG[g_APinDescription[ulPin].ulPin].reg&=~(uint8_t)(PORT_PINCFG_INEN) ;
       PORT->Group[g_APinDescription[ulPin].ulPort].DIRSET.reg = (uint32_t)(1<<g_APinDescription[ulPin].ulPin) ;
     break ;