Added quick start guide.

Readme.md

@@ -1,3 +1,4 @@
 # Neurosky Mindwave M5Stack Core2 connection
 - Neusky Mindwave MAC Address: 98:07:2d:7f:ea:15
-- documentation: http://developer.neurosky.com/docs/doku.php?id=thinkgear_communications_protocol
+- documentation: http://developer.neurosky.com/docs/doku.php?id=thinkgear_communications_protocol
+- quick start guide: http://download.neurosky.com/public/Products/MindWave%20Mobile%202/MindWave%20Mobile%202%20Quick%20Start%20Guide.pdf

parser/core2_C_Parser.ino

@@ -0,0 +1,107 @@
+#define BAUDRATE 57600
+#define DEBUGOUTPUT 0
+
+// checksum variables
+byte  generatedChecksum = 0;
+byte  checksum = 0; 
+int   payloadLength = 0;
+byte  payloadData[64] = {0};
+byte  poorQuality = 0;
+byte  attention = 0;
+byte  meditation = 0;
+
+// system variables
+long    lastReceivedPacket = 0;
+boolean bigPacket = false;
+
+//////////////////////////
+// Microprocessor Setup //
+//////////////////////////
+void setup(){
+  Serial1.begin(BAUDRATE);           // Serial port 1 (ATMEGA2560)
+  Serial.begin(BAUDRATE);           // USB
+}
+
+////////////////////////////////
+// Read data from Serial UART //
+////////////////////////////////
+byte ReadOneByte() {
+  int ByteRead;
+  while(!Serial1.available());
+  ByteRead = Serial1.read();
+  
+  #if DEBUGOUTPUT  
+    Serial.print((char)ByteRead);   // echo the same byte out the USB serial (for debug purposes)
+  #endif
+  
+  return ByteRead;
+}
+
+/////////////
+//MAIN LOOP//
+/////////////
+void loop() {
+  // Look for sync bytes
+  if(ReadOneByte() == 170) {
+    if(ReadOneByte() == 170) {
+      payloadLength = ReadOneByte();
+      if(payloadLength > 169)                      //Payload length can not be greater than 169
+      return;
+
+      generatedChecksum = 0;        
+      for(int i = 0; i < payloadLength; i++) {  
+        payloadData[i] = ReadOneByte();            //Read payload into memory
+        generatedChecksum += payloadData[i];
+      }   
+
+      checksum = ReadOneByte();                      //Read checksum byte from stream      
+      generatedChecksum = 255 - generatedChecksum;   //Take one's compliment of generated checksum
+
+        if(checksum == generatedChecksum) {    
+
+        poorQuality = 200;
+        attention = 0;
+        meditation = 0;
+
+        for(int i = 0; i < payloadLength; i++) {    // Parse the payload
+          switch (payloadData[i]) {
+          case 2:
+            i++;            
+            poorQuality = payloadData[i];
+            bigPacket = true;            
+            break;
+          case 4:
+            i++;
+            attention = payloadData[i];                        
+            break;
+          case 5:
+            i++;
+            meditation = payloadData[i];
+            break;
+          case 0x80:
+            i = i + 3;
+            break;
+          case 0x83:
+            i = i + 25;      
+            break;
+          default:
+            break;
+          } // switch
+        } // for loop
+
+#if !DEBUGOUTPUT
+        // *** Add your code here ***
+        if(bigPacket) {
+          Serial.print("Attention: ");
+          Serial.print(attention);
+          Serial.print("\n");
+        }
+#endif        
+        bigPacket = false;        
+      }
+      else {
+        // Checksum Error
+      }  // end if else for checksum
+    } // end if read 0xAA byte
+  } // end if read 0xAA byte
+}

parser/sample_C_Parser

@@ -57,6 +57,7 @@ int main( int argc, char **argv ) {
      * application.  See documentation for "Serial I/O" for your
      * platform for details.
      */
+    
     FILE *stream = 0;
     stream = fopen( "COM4", "r" );