Update

added support for travis ci

.travis.yml

@@ -0,0 +1,17 @@
+language: python
+python:
+    - "2.7"
+env:
+    - BOARD=uno
+    - BOARD=leonardo
+    - BOARD=esp01
+
+install:
+    - python -c "$(curl -fsSL https://raw.githubusercontent.com/platformio/platformio/master/scripts/get-platformio.py)"
+
+script:
+    - cd examples/FullFunction
+    - platformio ci -l ../.. FullFunction.ino --board=$BOARD
+    - cd ../GetStarted
+    - platformio ci -l ../.. getStarted.ino --board=$BOARD
+

DFRobotDFPlayerMini.cpp

@@ -33,6 +33,7 @@ uint16_t DFRobotDFPlayerMini::calculateCheckSum(uint8_t *buffer){
 void DFRobotDFPlayerMini::sendStack(){
   if (_sending[Stack_ACK]) {
     while (_isSending) {
+      delay(0);
       available();
     }
   }
@@ -81,11 +82,13 @@ void DFRobotDFPlayerMini::disableACK(){
 
 bool DFRobotDFPlayerMini::waitAvailable(){
   _isSending = true;
-  while (!available());
+  while (!available()){
+    delay(0);
+  }
   return _handleType != TimeOut;
 }
 
-bool DFRobotDFPlayerMini::begin(Stream &stream, bool isACK){
+bool DFRobotDFPlayerMini::begin(Stream &stream, bool isACK, bool doReset){
   if (isACK) {
     enableACK();
   }
@@ -94,11 +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;
 }
 
@@ -123,6 +133,7 @@ bool DFRobotDFPlayerMini::handleMessage(uint8_t type, uint16_t parameter){
 bool DFRobotDFPlayerMini::handleError(uint8_t type, uint16_t parameter){
   handleMessage(type, parameter);
   _isSending = false;
+  return false;
 }
 
 uint8_t DFRobotDFPlayerMini::readCommand(){
@@ -195,6 +206,7 @@ bool DFRobotDFPlayerMini::validateStack(){
 
 bool DFRobotDFPlayerMini::available(){
   while (_serial->available()) {
+    delay(0);
     if (_receivedIndex == 0) {
       _received[Stack_Header] = _serial->read();
 #ifdef _DEBUG
@@ -394,7 +406,6 @@ int DFRobotDFPlayerMini::readVolume(){
 
 uint8_t DFRobotDFPlayerMini::readEQ(){
   sendStack(0x44);
-  while (!available());
   if (waitAvailable()) {
     return read();
   }
@@ -458,12 +469,22 @@ int DFRobotDFPlayerMini::readFileCountsInFolder(int folderNumber){
   }
 }
 
+int DFRobotDFPlayerMini::readFolderCounts(){
+  sendStack(0x4F);
+  if (waitAvailable()) {
+    return read();
+  }
+  else{
+    return -1;
+  }
+}
+
 int DFRobotDFPlayerMini::readFileCounts(){
-  readFileCounts(DFPLAYER_DEVICE_SD);
+  return readFileCounts(DFPLAYER_DEVICE_SD);
 }
 
 int DFRobotDFPlayerMini::readCurrentFileNumber(){
-  readCurrentFileNumber(DFPLAYER_DEVICE_SD);
+  return readCurrentFileNumber(DFPLAYER_DEVICE_SD);
 }
 
 

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();
   
@@ -186,6 +186,8 @@ class DFRobotDFPlayerMini {
   int readFileCountsInFolder(int folderNumber);
   
   int readFileCounts();
+
+  int readFolderCounts();
   
   int readCurrentFileNumber();
   

examples/GetStarted/getStarted.ino

@@ -1,11 +1,11 @@
 /***************************************************
 DFPlayer - A Mini MP3 Player For Arduino
- <https://www.dfrobot.com/index.php?route=product/product&product_id=1121>
+ <https://www.dfrobot.com/index.php?route=product/product&search=mp3&description=true&product_id=1121>
  
  ***************************************************
  This example shows the basic function of library for DFPlayer.
  
- Created 2016-12-07
+ Created 2014-8-28
  By [Angelo qiao](Angelo.qiao@dfrobot.com)
  
  GNU Lesser General Public License.
@@ -15,7 +15,7 @@ DFPlayer - A Mini MP3 Player For Arduino
 
 /***********Notice and Trouble shooting***************
  1.Connection and Diagram can be found here
- <https://www.dfrobot.com/wiki/index.php/DFPlayer_Mini_SKU:DFR0299#Connection_Diagram>
+ <>
  2.This code is tested on Arduino Uno, Leonardo, Mega boards.
  ****************************************************/
 
@@ -40,7 +40,9 @@ void setup()
     Serial.println(F("Unable to begin:"));
     Serial.println(F("1.Please recheck the connection!"));
     Serial.println(F("2.Please insert the SD card!"));
-    while(true);
+    while(true){
+      delay(0); // Code to compatible with ESP8266 watch dog.
+    }
   }
   Serial.println(F("DFPlayer Mini online."));
   

library.properties

@@ -1,5 +1,5 @@
 name=DFRobotDFPlayerMini
-version=1.0.1
+version=1.0.2
 author=DFRobot
 maintainer=Angelo <angelo.qiao@dfrobot.com>
 sentence=Driver for DFPlayer Mini from DFRobot