Merge pull request #5 from jandelgado/make_call_to_init_optional

Made the call to init() in DFRobotDFPlayerMini::begin() optional.

Author: jimaobian

DFRobotDFPlayerMini.cpp

@@ -88,7 +88,7 @@ bool DFRobotDFPlayerMini::waitAvailable(){
   return _handleType != TimeOut;
 }
 
-bool DFRobotDFPlayerMini::begin(Stream &stream, bool isACK){
+bool DFRobotDFPlayerMini::begin(Stream &stream, bool isACK, bool doReset){
   if (isACK) {
     enableACK();
   }
@@ -97,11 +97,18 @@ bool DFRobotDFPlayerMini::begin(Stream &stream, bool isACK){
   }
 
   _serial = &stream;
-  _timeOutDuration += 3000;
-  reset();
-  waitAvailable();
-  _timeOutDuration -= 3000;
-  delay(200);
+
+  if (doReset) {
+    _timeOutDuration += 3000;
+    reset();
+    waitAvailable();
+    _timeOutDuration -= 3000;
+    delay(200);
+  } else {
+    // assume same state as with reset(): online
+    _handleType = DFPlayerCardOnline;
+  }
+
   return (readType() == DFPlayerCardOnline) || !isACK;
 }
 

DFRobotDFPlayerMini.h

@@ -105,7 +105,7 @@ class DFRobotDFPlayerMini {
 
   uint8_t readCommand();
 
-  bool begin(Stream& stream, bool isACK = true);
+  bool begin(Stream& stream, bool isACK = true, bool doReset = true);
 
   bool waitAvailable();